Merge branch 'nushell:main' into main

.github/workflows/typos.yml

@@ -10,4 +10,4 @@ jobs:
         uses: actions/checkout@v4.1.7
 
       - name: Check spelling
-        uses: crate-ci/typos@v1.27.3
+        uses: crate-ci/typos@v1.28.1

Cargo.toml

@@ -71,7 +71,7 @@ brotli = "6.0"
 byteorder = "1.5"
 bytes = "1"
 bytesize = "1.3"
-calamine = "0.24.0"
+calamine = "0.26.1"
 chardetng = "0.1.17"
 chrono = { default-features = false, version = "0.4.34" }
 chrono-humanize = "0.2.3"
@@ -106,7 +106,7 @@ lsp-server = "0.7.5"
 lsp-types = { version = "0.95.0", features = ["proposed"] }
 mach2 = "0.4"
 md5 = { version = "0.10", package = "md-5" }
-miette = "7.2"
+miette = "7.3"
 mime = "0.3.17"
 mime_guess = "2.0"
 mockito = { version = "1.6", default-features = false }
@@ -129,7 +129,7 @@ proc-macro-error = { version = "1.0", default-features = false }
 proc-macro2 = "1.0"
 procfs = "0.16.0"
 pwd = "1.3"
-quick-xml = "0.32.0"
+quick-xml = "0.37.0"
 quickcheck = "1.0"
 quickcheck_macros = "1.0"
 quote = "1.0"
@@ -156,22 +156,23 @@ syn = "2.0"
 sysinfo = "0.32"
 tabled = { version = "0.16.0", default-features = false }
 tempfile = "3.14"
-terminal_size = "0.3"
+terminal_size = "0.4"
 titlecase = "2.0"
 toml = "0.8"
 trash = "5.2"
 umask = "2.1"
 unicode-segmentation = "1.12"
-unicode-width = "0.1"
+unicode-width = "0.2"
 ureq = { version = "2.10", default-features = false }
 url = "2.2"
-uu_cp = "0.0.27"
+uu_cp = "0.0.28"
-uu_mkdir = "0.0.27"
+uu_mkdir = "0.0.28"
-uu_mktemp = "0.0.27"
+uu_mktemp = "0.0.28"
-uu_mv = "0.0.27"
+uu_mv = "0.0.28"
-uu_whoami = "0.0.27"
+uu_touch = "0.0.28"
-uu_uname = "0.0.27"
+uu_whoami = "0.0.28"
-uucore = "0.0.27"
+uu_uname = "0.0.28"
+uucore = "0.0.28"
 uuid = "1.11.0"
 v_htmlescape = "0.15.0"
 wax = "0.6"
@@ -313,7 +314,7 @@ bench = false
 # To use a development version of a dependency please use a global override here
 # changing versions in each sub-crate of the workspace is tedious
 [patch.crates-io]
-# reedline = { git = "https://github.com/nushell/reedline", branch = "main" }
+reedline = { git = "https://github.com/nushell/reedline", branch = "main" }
 # nu-ansi-term = {git = "https://github.com/nushell/nu-ansi-term.git", branch = "main"}
 
 # Run all benchmarks with `cargo bench`

README.md

@@ -58,7 +58,7 @@ For details about which platforms the Nushell team actively supports, see [our p
 
 ## Configuration
 
-The default configurations can be found at [sample_config](crates/nu-utils/src/sample_config)
+The default configurations can be found at [sample_config](crates/nu-utils/src/default_files)
 which are the configuration files one gets when they startup Nushell for the first time.
 
 It sets all of the default configuration to run Nushell.  From here one can

crates/nu-cli/src/completions/command_completions.rs

@@ -1,5 +1,7 @@
+use std::collections::HashMap;
+
 use crate::{
-    completions::{Completer, CompletionOptions, MatchAlgorithm},
+    completions::{Completer, CompletionOptions},
     SuggestionKind,
 };
 use nu_parser::FlatShape;
@@ -9,7 +11,7 @@ use nu_protocol::{
 };
 use reedline::Suggestion;
 
-use super::{completion_common::sort_suggestions, SemanticSuggestion};
+use super::{completion_options::NuMatcher, SemanticSuggestion};
 
 pub struct CommandCompletion {
     flattened: Vec<(Span, FlatShape)>,
@@ -33,10 +35,11 @@ impl CommandCompletion {
     fn external_command_completion(
         &self,
         working_set: &StateWorkingSet,
-        prefix: &str,
+        sugg_span: reedline::Span,
-        match_algorithm: MatchAlgorithm,
+        matched_internal: impl Fn(&str) -> bool,
-    ) -> Vec<String> {
+        matcher: &mut NuMatcher<String>,
-        let mut executables = vec![];
+    ) -> HashMap<String, SemanticSuggestion> {
+        let mut suggs = HashMap::new();
 
         // os agnostic way to get the PATH env var
         let paths = working_set.permanent_state.get_path_env_var();
@@ -54,24 +57,38 @@ impl CommandCompletion {
                                 .completions
                                 .external
                                 .max_results
-                                > executables.len() as i64
+                                <= suggs.len() as i64
-                                && !executables.contains(
-                                    &item
-                                        .path()
-                                        .file_name()
-                                        .map(|x| x.to_string_lossy().to_string())
-                                        .unwrap_or_default(),
-                                )
-                                && matches!(
-                                    item.path().file_name().map(|x| match_algorithm
-                                        .matches_str(&x.to_string_lossy(), prefix)),
-                                    Some(true)
-                                )
-                                && is_executable::is_executable(item.path())
                             {
-                                if let Ok(name) = item.file_name().into_string() {
+                                break;
-                                    executables.push(name);
                             }
+                            let Ok(name) = item.file_name().into_string() else {
+                                continue;
+                            };
+                            let value = if matched_internal(&name) {
+                                format!("^{}", name)
+                            } else {
+                                name.clone()
+                            };
+                            if suggs.contains_key(&value) {
+                                continue;
+                            }
+                            if matcher.matches(&name) && is_executable::is_executable(item.path()) {
+                                // If there's an internal command with the same name, adds ^cmd to the
+                                // matcher so that both the internal and external command are included
+                                matcher.add(&name, value.clone());
+                                suggs.insert(
+                                    value.clone(),
+                                    SemanticSuggestion {
+                                        suggestion: Suggestion {
+                                            value,
+                                            span: sugg_span,
+                                            append_whitespace: true,
+                                            ..Default::default()
+                                        },
+                                        // TODO: is there a way to create a test?
+                                        kind: None,
+                                    },
+                                );
                             }
                         }
                     }
@@ -79,7 +96,7 @@ impl CommandCompletion {
             }
         }
 
-        executables
+        suggs
     }
 
     fn complete_commands(
@@ -88,69 +105,60 @@ impl CommandCompletion {
         span: Span,
         offset: usize,
         find_externals: bool,
-        match_algorithm: MatchAlgorithm,
+        options: &CompletionOptions,
     ) -> Vec<SemanticSuggestion> {
         let partial = working_set.get_span_contents(span);
+        let mut matcher = NuMatcher::new(String::from_utf8_lossy(partial), options.clone());
 
-        let filter_predicate = |command: &[u8]| match_algorithm.matches_u8(command, partial);
+        let sugg_span = reedline::Span::new(span.start - offset, span.end - offset);
 
-        let mut results = working_set
+        let mut internal_suggs = HashMap::new();
-            .find_commands_by_predicate(filter_predicate, true)
+        let filtered_commands = working_set.find_commands_by_predicate(
-            .into_iter()
+            |name| {
-            .map(move |x| SemanticSuggestion {
+                let name = String::from_utf8_lossy(name);
+                matcher.add(&name, name.to_string())
+            },
+            true,
+        );
+        for (name, description, typ) in filtered_commands {
+            let name = String::from_utf8_lossy(&name);
+            internal_suggs.insert(
+                name.to_string(),
+                SemanticSuggestion {
                     suggestion: Suggestion {
-                    value: String::from_utf8_lossy(&x.0).to_string(),
+                        value: name.to_string(),
-                    description: x.1,
+                        description,
-                    span: reedline::Span::new(span.start - offset, span.end - offset),
+                        span: sugg_span,
                         append_whitespace: true,
                         ..Suggestion::default()
                     },
-                kind: Some(SuggestionKind::Command(x.2)),
+                    kind: Some(SuggestionKind::Command(typ)),
-            })
-            .collect::<Vec<_>>();
-
-        let partial = working_set.get_span_contents(span);
-        let partial = String::from_utf8_lossy(partial).to_string();
-
-        if find_externals {
-            let results_external = self
-                .external_command_completion(working_set, &partial, match_algorithm)
-                .into_iter()
-                .map(move |x| SemanticSuggestion {
-                    suggestion: Suggestion {
-                        value: x,
-                        span: reedline::Span::new(span.start - offset, span.end - offset),
-                        append_whitespace: true,
-                        ..Suggestion::default()
                 },
-                    // TODO: is there a way to create a test?
+            );
-                    kind: None,
+        }
-                });
 
-            let results_strings: Vec<String> =
+        let mut external_suggs = if find_externals {
-                results.iter().map(|x| x.suggestion.value.clone()).collect();
+            self.external_command_completion(
-
+                working_set,
-            for external in results_external {
+                sugg_span,
-                if results_strings.contains(&external.suggestion.value) {
+                |name| internal_suggs.contains_key(name),
-                    results.push(SemanticSuggestion {
+                &mut matcher,
-                        suggestion: Suggestion {
+            )
-                            value: format!("^{}", external.suggestion.value),
-                            span: external.suggestion.span,
-                            append_whitespace: true,
-                            ..Suggestion::default()
-                        },
-                        kind: external.kind,
-                    })
         } else {
-                    results.push(external)
+            HashMap::new()
-                }
+        };
-            }
 
-            results
+        let mut res = Vec::new();
-        } else {
+        for cmd_name in matcher.results() {
-            results
+            if let Some(sugg) = internal_suggs
+                .remove(&cmd_name)
+                .or_else(|| external_suggs.remove(&cmd_name))
+            {
+                res.push(sugg);
             }
         }
+        res
+    }
 }
 
 impl Completer for CommandCompletion {
@@ -158,7 +166,7 @@ impl Completer for CommandCompletion {
         &mut self,
         working_set: &StateWorkingSet,
         _stack: &Stack,
-        prefix: &[u8],
+        _prefix: &[u8],
         span: Span,
         offset: usize,
         pos: usize,
@@ -188,18 +196,18 @@ impl Completer for CommandCompletion {
                 Span::new(last.0.start, pos),
                 offset,
                 false,
-                options.match_algorithm,
+                options,
             )
         } else {
             vec![]
         };
 
         if !subcommands.is_empty() {
-            return sort_suggestions(&String::from_utf8_lossy(prefix), subcommands, options);
+            return subcommands;
         }
 
         let config = working_set.get_config();
-        let commands = if matches!(self.flat_shape, nu_parser::FlatShape::External)
+        if matches!(self.flat_shape, nu_parser::FlatShape::External)
             || matches!(self.flat_shape, nu_parser::FlatShape::InternalCall(_))
             || ((span.end - span.start) == 0)
             || is_passthrough_command(working_set.delta.get_file_contents())
@@ -214,13 +222,11 @@ impl Completer for CommandCompletion {
                 span,
                 offset,
                 config.completions.external.enable,
-                options.match_algorithm,
+                options,
             )
         } else {
             vec![]
-        };
+        }
-
-        sort_suggestions(&String::from_utf8_lossy(prefix), commands, options)
     }
 }
 

crates/nu-cli/src/completions/completion_common.rs

@@ -1,22 +1,20 @@
-use super::MatchAlgorithm;
+use super::{completion_options::NuMatcher, MatchAlgorithm};
-use crate::{
+use crate::completions::CompletionOptions;
-    completions::{matches, CompletionOptions},
-    SemanticSuggestion,
-};
-use fuzzy_matcher::{skim::SkimMatcherV2, FuzzyMatcher};
 use nu_ansi_term::Style;
 use nu_engine::env_to_string;
 use nu_path::dots::expand_ndots;
 use nu_path::{expand_to_real_path, home_dir};
 use nu_protocol::{
     engine::{EngineState, Stack, StateWorkingSet},
-    CompletionSort, Span,
+    Span,
 };
 use nu_utils::get_ls_colors;
+use nu_utils::IgnoreCaseExt;
 use std::path::{is_separator, Component, Path, PathBuf, MAIN_SEPARATOR as SEP};
 
 #[derive(Clone, Default)]
 pub struct PathBuiltFromString {
+    cwd: PathBuf,
     parts: Vec<String>,
     isdir: bool,
 }
@@ -30,35 +28,41 @@ pub struct PathBuiltFromString {
 /// want_directory: Whether we want only directories as completion matches.
 /// Some commands like `cd` can only be run on directories whereas others
 /// like `ls` can be run on regular files as well.
-pub fn complete_rec(
+fn complete_rec(
     partial: &[&str],
-    built: &PathBuiltFromString,
+    built_paths: &[PathBuiltFromString],
-    cwd: &Path,
     options: &CompletionOptions,
     want_directory: bool,
     isdir: bool,
 ) -> Vec<PathBuiltFromString> {
-    let mut completions = vec![];
-
     if let Some((&base, rest)) = partial.split_first() {
         if base.chars().all(|c| c == '.') && (isdir || !rest.is_empty()) {
+            let built_paths: Vec<_> = built_paths
+                .iter()
+                .map(|built| {
                     let mut built = built.clone();
                     built.parts.push(base.to_string());
                     built.isdir = true;
-            return complete_rec(rest, &built, cwd, options, want_directory, isdir);
+                    built
+                })
+                .collect();
+            return complete_rec(rest, &built_paths, options, want_directory, isdir);
         }
     }
 
-    let mut built_path = cwd.to_path_buf();
+    let prefix = partial.first().unwrap_or(&"");
+    let mut matcher = NuMatcher::new(prefix, options.clone());
+
+    for built in built_paths {
+        let mut path = built.cwd.clone();
         for part in &built.parts {
-        built_path.push(part);
+            path.push(part);
         }
 
-    let Ok(result) = built_path.read_dir() else {
+        let Ok(result) = path.read_dir() else {
-        return completions;
+            continue;
         };
 
-    let mut entries = Vec::new();
         for entry in result.filter_map(|e| e.ok()) {
             let entry_name = entry.file_name().to_string_lossy().into_owned();
             let entry_isdir = entry.path().is_dir();
@@ -67,17 +71,15 @@ pub fn complete_rec(
             built.isdir = entry_isdir;
 
             if !want_directory || entry_isdir {
-            entries.push((entry_name, built));
+                matcher.add(entry_name.clone(), (entry_name, built));
+            }
         }
     }
 
-    let prefix = partial.first().unwrap_or(&"");
+    let mut completions = vec![];
-    let sorted_entries = sort_completions(prefix, entries, options, |(entry, _)| entry);
+    for (entry_name, built) in matcher.results() {
-
-    for (entry_name, built) in sorted_entries {
         match partial.split_first() {
             Some((base, rest)) => {
-                if matches(base, &entry_name, options) {
                 // We use `isdir` to confirm that the current component has
                 // at least one next component or a slash.
                 // Serves as confirmation to ignore longer completions for
@@ -85,8 +87,7 @@ pub fn complete_rec(
                 if !rest.is_empty() || isdir {
                     completions.extend(complete_rec(
                         rest,
-                            &built,
+                        &[built],
-                            cwd,
                         options,
                         want_directory,
                         isdir,
@@ -94,14 +95,19 @@ pub fn complete_rec(
                 } else {
                     completions.push(built);
                 }
-                }
+
-                if entry_name.eq(base)
+                // For https://github.com/nushell/nushell/issues/13204
-                    && matches!(options.match_algorithm, MatchAlgorithm::Prefix)
+                if isdir && options.match_algorithm == MatchAlgorithm::Prefix {
-                    && isdir
+                    let exact_match = if options.case_sensitive {
-                {
+                        entry_name.eq(base)
+                    } else {
+                        entry_name.to_folded_case().eq(&base.to_folded_case())
+                    };
+                    if exact_match {
                         break;
                     }
                 }
+            }
             None => {
                 completions.push(built);
             }
@@ -147,15 +153,25 @@ fn surround_remove(partial: &str) -> String {
     partial.to_string()
 }
 
+pub struct FileSuggestion {
+    pub span: nu_protocol::Span,
+    pub path: String,
+    pub style: Option<Style>,
+    pub cwd: PathBuf,
+}
+
+/// # Parameters
+/// * `cwds` - A list of directories in which to search. The only reason this isn't a single string
+///   is because dotnu_completions searches in multiple directories at once
 pub fn complete_item(
     want_directory: bool,
     span: nu_protocol::Span,
     partial: &str,
-    cwd: &str,
+    cwds: &[impl AsRef<str>],
     options: &CompletionOptions,
     engine_state: &EngineState,
     stack: &Stack,
-) -> Vec<(nu_protocol::Span, String, Option<Style>)> {
+) -> Vec<FileSuggestion> {
     let cleaned_partial = surround_remove(partial);
     let isdir = cleaned_partial.ends_with(is_separator);
     let expanded_partial = expand_ndots(Path::new(&cleaned_partial));
@@ -175,7 +191,10 @@ pub fn complete_item(
         partial.push_str(&format!("{path_separator}."));
     }
 
-    let cwd_pathbuf = Path::new(cwd).to_path_buf();
+    let cwd_pathbufs: Vec<_> = cwds
+        .iter()
+        .map(|cwd| Path::new(cwd.as_ref()).to_path_buf())
+        .collect();
     let ls_colors = (engine_state.config.completions.use_ls_colors
         && engine_state.config.use_ansi_coloring)
         .then(|| {
@@ -186,7 +205,7 @@ pub fn complete_item(
             get_ls_colors(ls_colors_env_str)
         });
 
-    let mut cwd = cwd_pathbuf.clone();
+    let mut cwds = cwd_pathbufs.clone();
     let mut prefix_len = 0;
     let mut original_cwd = OriginalCwd::None;
 
@@ -194,19 +213,21 @@ pub fn complete_item(
     match components.peek().cloned() {
         Some(c @ Component::Prefix(..)) => {
             // windows only by definition
-            cwd = [c, Component::RootDir].iter().collect();
+            cwds = vec![[c, Component::RootDir].iter().collect()];
             prefix_len = c.as_os_str().len();
             original_cwd = OriginalCwd::Prefix(c.as_os_str().to_string_lossy().into_owned());
         }
         Some(c @ Component::RootDir) => {
             // This is kind of a hack. When joining an empty string with the rest,
             // we add the slash automagically
-            cwd = PathBuf::from(c.as_os_str());
+            cwds = vec![PathBuf::from(c.as_os_str())];
             prefix_len = 1;
             original_cwd = OriginalCwd::Prefix(String::new());
         }
         Some(Component::Normal(home)) if home.to_string_lossy() == "~" => {
-            cwd = home_dir().map(Into::into).unwrap_or(cwd_pathbuf);
+            cwds = home_dir()
+                .map(|dir| vec![dir.into()])
+                .unwrap_or(cwd_pathbufs);
             prefix_len = 1;
             original_cwd = OriginalCwd::Home;
         }
@@ -223,8 +244,14 @@ pub fn complete_item(
 
     complete_rec(
         partial.as_slice(),
-        &PathBuiltFromString::default(),
+        &cwds
-        &cwd,
+            .into_iter()
+            .map(|cwd| PathBuiltFromString {
+                cwd,
+                parts: Vec::new(),
+                isdir: false,
+            })
+            .collect::<Vec<_>>(),
         options,
         want_directory,
         isdir,
@@ -234,6 +261,7 @@ pub fn complete_item(
         if should_collapse_dots {
             p = collapse_ndots(p);
         }
+        let cwd = p.cwd.clone();
         let path = original_cwd.apply(p, path_separator);
         let style = ls_colors.as_ref().map(|lsc| {
             lsc.style_for_path_with_metadata(
@@ -245,7 +273,12 @@ pub fn complete_item(
             .map(lscolors::Style::to_nu_ansi_term_style)
             .unwrap_or_default()
         });
-        (span, escape_path(path, want_directory), style)
+        FileSuggestion {
+            span,
+            path: escape_path(path, want_directory),
+            style,
+            cwd,
+        }
     })
     .collect()
 }
@@ -310,45 +343,6 @@ pub fn adjust_if_intermediate(
     }
 }
 
-/// Convenience function to sort suggestions using [`sort_completions`]
-pub fn sort_suggestions(
-    prefix: &str,
-    items: Vec<SemanticSuggestion>,
-    options: &CompletionOptions,
-) -> Vec<SemanticSuggestion> {
-    sort_completions(prefix, items, options, |it| &it.suggestion.value)
-}
-
-/// # Arguments
-/// * `prefix` - What the user's typed, for sorting by fuzzy matcher score
-pub fn sort_completions<T>(
-    prefix: &str,
-    mut items: Vec<T>,
-    options: &CompletionOptions,
-    get_value: fn(&T) -> &str,
-) -> Vec<T> {
-    // Sort items
-    if options.sort == CompletionSort::Smart && options.match_algorithm == MatchAlgorithm::Fuzzy {
-        let mut matcher = SkimMatcherV2::default();
-        if options.case_sensitive {
-            matcher = matcher.respect_case();
-        } else {
-            matcher = matcher.ignore_case();
-        };
-        items.sort_unstable_by(|a, b| {
-            let a_str = get_value(a);
-            let b_str = get_value(b);
-            let a_score = matcher.fuzzy_match(a_str, prefix).unwrap_or_default();
-            let b_score = matcher.fuzzy_match(b_str, prefix).unwrap_or_default();
-            b_score.cmp(&a_score).then(a_str.cmp(b_str))
-        });
-    } else {
-        items.sort_unstable_by(|a, b| get_value(a).cmp(get_value(b)));
-    }
-
-    items
-}
-
 /// Collapse multiple ".." components into n-dots.
 ///
 /// It performs the reverse operation of `expand_ndots`, collapsing sequences of ".." into n-dots,
@@ -359,6 +353,7 @@ fn collapse_ndots(path: PathBuiltFromString) -> PathBuiltFromString {
     let mut result = PathBuiltFromString {
         parts: Vec::with_capacity(path.parts.len()),
         isdir: path.isdir,
+        cwd: path.cwd,
     };
 
     let mut dot_count = 0;

crates/nu-cli/src/completions/completion_options.rs

@@ -1,7 +1,10 @@
 use fuzzy_matcher::{skim::SkimMatcherV2, FuzzyMatcher};
 use nu_parser::trim_quotes_str;
 use nu_protocol::{CompletionAlgorithm, CompletionSort};
-use std::fmt::Display;
+use nu_utils::IgnoreCaseExt;
+use std::{borrow::Cow, fmt::Display};
+
+use super::SemanticSuggestion;
 
 /// Describes how suggestions should be matched.
 #[derive(Copy, Clone, Debug, PartialEq)]
@@ -19,32 +22,153 @@ pub enum MatchAlgorithm {
     Fuzzy,
 }
 
-impl MatchAlgorithm {
+pub struct NuMatcher<T> {
-    /// Returns whether the `needle` search text matches the given `haystack`.
+    options: CompletionOptions,
-    pub fn matches_str(&self, haystack: &str, needle: &str) -> bool {
+    needle: String,
+    state: State<T>,
+}
+
+enum State<T> {
+    Prefix {
+        /// Holds (haystack, item)
+        items: Vec<(String, T)>,
+    },
+    Fuzzy {
+        matcher: Box<SkimMatcherV2>,
+        /// Holds (haystack, item, score)
+        items: Vec<(String, T, i64)>,
+    },
+}
+
+/// Filters and sorts suggestions
+impl<T> NuMatcher<T> {
+    /// # Arguments
+    ///
+    /// * `needle` - The text to search for
+    pub fn new(needle: impl AsRef<str>, options: CompletionOptions) -> NuMatcher<T> {
+        let orig_needle = trim_quotes_str(needle.as_ref());
+        let lowercase_needle = if options.case_sensitive {
+            orig_needle.to_owned()
+        } else {
+            orig_needle.to_folded_case()
+        };
+        match options.match_algorithm {
+            MatchAlgorithm::Prefix => NuMatcher {
+                options,
+                needle: lowercase_needle,
+                state: State::Prefix { items: Vec::new() },
+            },
+            MatchAlgorithm::Fuzzy => {
+                let mut matcher = SkimMatcherV2::default();
+                if options.case_sensitive {
+                    matcher = matcher.respect_case();
+                } else {
+                    matcher = matcher.ignore_case();
+                };
+                NuMatcher {
+                    options,
+                    needle: orig_needle.to_owned(),
+                    state: State::Fuzzy {
+                        matcher: Box::new(matcher),
+                        items: Vec::new(),
+                    },
+                }
+            }
+        }
+    }
+
+    /// Returns whether or not the haystack matches the needle. If it does, `item` is added
+    /// to the list of matches (if given).
+    ///
+    /// Helper to avoid code duplication between [NuMatcher::add] and [NuMatcher::matches].
+    fn matches_aux(&mut self, haystack: &str, item: Option<T>) -> bool {
         let haystack = trim_quotes_str(haystack);
-        let needle = trim_quotes_str(needle);
+        match &mut self.state {
-        match *self {
+            State::Prefix { items } => {
-            MatchAlgorithm::Prefix => haystack.starts_with(needle),
+                let haystack_folded = if self.options.case_sensitive {
-            MatchAlgorithm::Fuzzy => {
+                    Cow::Borrowed(haystack)
-                let matcher = SkimMatcherV2::default();
+                } else {
-                matcher.fuzzy_match(haystack, needle).is_some()
+                    Cow::Owned(haystack.to_folded_case())
+                };
+                let matches = if self.options.positional {
+                    haystack_folded.starts_with(self.needle.as_str())
+                } else {
+                    haystack_folded.contains(self.needle.as_str())
+                };
+                if matches {
+                    if let Some(item) = item {
+                        items.push((haystack.to_string(), item));
+                    }
+                }
+                matches
+            }
+            State::Fuzzy { items, matcher } => {
+                let Some(score) = matcher.fuzzy_match(haystack, &self.needle) else {
+                    return false;
+                };
+                if let Some(item) = item {
+                    items.push((haystack.to_string(), item, score));
+                }
+                true
             }
         }
     }
 
-    /// Returns whether the `needle` search text matches the given `haystack`.
+    /// Add the given item if the given haystack matches the needle.
-    pub fn matches_u8(&self, haystack: &[u8], needle: &[u8]) -> bool {
+    ///
-        match *self {
+    /// Returns whether the item was added.
-            MatchAlgorithm::Prefix => haystack.starts_with(needle),
+    pub fn add(&mut self, haystack: impl AsRef<str>, item: T) -> bool {
-            MatchAlgorithm::Fuzzy => {
+        self.matches_aux(haystack.as_ref(), Some(item))
-                let haystack_str = String::from_utf8_lossy(haystack);
+    }
-                let needle_str = String::from_utf8_lossy(needle);
 
-                let matcher = SkimMatcherV2::default();
+    /// Returns whether the haystack matches the needle.
-                matcher.fuzzy_match(&haystack_str, &needle_str).is_some()
+    pub fn matches(&mut self, haystack: &str) -> bool {
+        self.matches_aux(haystack, None)
+    }
+
+    /// Get all the items that matched (sorted)
+    pub fn results(self) -> Vec<T> {
+        match self.state {
+            State::Prefix { mut items, .. } => {
+                items.sort_by(|(haystack1, _), (haystack2, _)| {
+                    let cmp_sensitive = haystack1.cmp(haystack2);
+                    if self.options.case_sensitive {
+                        cmp_sensitive
+                    } else {
+                        haystack1
+                            .to_folded_case()
+                            .cmp(&haystack2.to_folded_case())
+                            .then(cmp_sensitive)
+                    }
+                });
+                items.into_iter().map(|(_, item)| item).collect::<Vec<_>>()
+            }
+            State::Fuzzy { mut items, .. } => {
+                match self.options.sort {
+                    CompletionSort::Alphabetical => {
+                        items.sort_by(|(haystack1, _, _), (haystack2, _, _)| {
+                            haystack1.cmp(haystack2)
+                        });
+                    }
+                    CompletionSort::Smart => {
+                        items.sort_by(|(haystack1, _, score1), (haystack2, _, score2)| {
+                            score2.cmp(score1).then(haystack1.cmp(haystack2))
+                        });
                     }
                 }
+                items
+                    .into_iter()
+                    .map(|(_, item, _)| item)
+                    .collect::<Vec<_>>()
+            }
+        }
+    }
+}
+
+impl NuMatcher<SemanticSuggestion> {
+    pub fn add_semantic_suggestion(&mut self, sugg: SemanticSuggestion) -> bool {
+        let value = sugg.suggestion.value.to_string();
+        self.add(value, sugg)
     }
 }
 
@@ -105,35 +229,49 @@ impl Default for CompletionOptions {
 
 #[cfg(test)]
 mod test {
-    use super::MatchAlgorithm;
+    use rstest::rstest;
 
-    #[test]
+    use super::{CompletionOptions, MatchAlgorithm, NuMatcher};
-    fn match_algorithm_prefix() {
-        let algorithm = MatchAlgorithm::Prefix;
 
-        assert!(algorithm.matches_str("example text", ""));
+    #[rstest]
-        assert!(algorithm.matches_str("example text", "examp"));
+    #[case(MatchAlgorithm::Prefix, "example text", "", true)]
-        assert!(!algorithm.matches_str("example text", "text"));
+    #[case(MatchAlgorithm::Prefix, "example text", "examp", true)]
-
+    #[case(MatchAlgorithm::Prefix, "example text", "text", false)]
-        assert!(algorithm.matches_u8(&[1, 2, 3], &[]));
+    #[case(MatchAlgorithm::Fuzzy, "example text", "", true)]
-        assert!(algorithm.matches_u8(&[1, 2, 3], &[1, 2]));
+    #[case(MatchAlgorithm::Fuzzy, "example text", "examp", true)]
-        assert!(!algorithm.matches_u8(&[1, 2, 3], &[2, 3]));
+    #[case(MatchAlgorithm::Fuzzy, "example text", "ext", true)]
+    #[case(MatchAlgorithm::Fuzzy, "example text", "mplxt", true)]
+    #[case(MatchAlgorithm::Fuzzy, "example text", "mpp", false)]
+    fn match_algorithm_simple(
+        #[case] match_algorithm: MatchAlgorithm,
+        #[case] haystack: &str,
+        #[case] needle: &str,
+        #[case] should_match: bool,
+    ) {
+        let options = CompletionOptions {
+            match_algorithm,
+            ..Default::default()
+        };
+        let mut matcher = NuMatcher::new(needle, options);
+        matcher.add(haystack, haystack);
+        if should_match {
+            assert_eq!(vec![haystack], matcher.results());
+        } else {
+            assert_ne!(vec![haystack], matcher.results());
+        }
     }
 
     #[test]
-    fn match_algorithm_fuzzy() {
+    fn match_algorithm_fuzzy_sort_score() {
-        let algorithm = MatchAlgorithm::Fuzzy;
+        let options = CompletionOptions {
-
+            match_algorithm: MatchAlgorithm::Fuzzy,
-        assert!(algorithm.matches_str("example text", ""));
+            ..Default::default()
-        assert!(algorithm.matches_str("example text", "examp"));
+        };
-        assert!(algorithm.matches_str("example text", "ext"));
+        let mut matcher = NuMatcher::new("fob", options);
-        assert!(algorithm.matches_str("example text", "mplxt"));
+        for item in ["foo/bar", "fob", "foo bar"] {
-        assert!(!algorithm.matches_str("example text", "mpp"));
+            matcher.add(item, item);
-
+        }
-        assert!(algorithm.matches_u8(&[1, 2, 3], &[]));
+        // Sort by score, then in alphabetical order
-        assert!(algorithm.matches_u8(&[1, 2, 3], &[1, 2]));
+        assert_eq!(vec!["fob", "foo bar", "foo/bar"], matcher.results());
-        assert!(algorithm.matches_u8(&[1, 2, 3], &[2, 3]));
-        assert!(algorithm.matches_u8(&[1, 2, 3], &[1, 3]));
-        assert!(!algorithm.matches_u8(&[1, 2, 3], &[2, 2]));
     }
 }

crates/nu-cli/src/completions/custom_completions.rs

@@ -9,10 +9,9 @@ use nu_protocol::{
     engine::{Stack, StateWorkingSet},
     CompletionSort, DeclId, PipelineData, Span, Type, Value,
 };
-use nu_utils::IgnoreCaseExt;
 use std::collections::HashMap;
 
-use super::completion_common::sort_suggestions;
+use super::completion_options::NuMatcher;
 
 pub struct CustomCompletion {
     stack: Stack,
@@ -123,41 +122,11 @@ impl Completer for CustomCompletion {
             })
             .unwrap_or_default();
 
-        let options = custom_completion_options
+        let options = custom_completion_options.unwrap_or(completion_options.clone());
-            .as_ref()
+        let mut matcher = NuMatcher::new(String::from_utf8_lossy(prefix), options);
-            .unwrap_or(completion_options);
+        for sugg in suggestions {
-        let suggestions = filter(prefix, suggestions, options);
+            matcher.add_semantic_suggestion(sugg);
-        sort_suggestions(&String::from_utf8_lossy(prefix), suggestions, options)
+        }
+        matcher.results()
     }
 }
-
-fn filter(
-    prefix: &[u8],
-    items: Vec<SemanticSuggestion>,
-    options: &CompletionOptions,
-) -> Vec<SemanticSuggestion> {
-    items
-        .into_iter()
-        .filter(|it| match options.match_algorithm {
-            MatchAlgorithm::Prefix => match (options.case_sensitive, options.positional) {
-                (true, true) => it.suggestion.value.as_bytes().starts_with(prefix),
-                (true, false) => it
-                    .suggestion
-                    .value
-                    .contains(std::str::from_utf8(prefix).unwrap_or("")),
-                (false, positional) => {
-                    let value = it.suggestion.value.to_folded_case();
-                    let prefix = std::str::from_utf8(prefix).unwrap_or("").to_folded_case();
-                    if positional {
-                        value.starts_with(&prefix)
-                    } else {
-                        value.contains(&prefix)
-                    }
-                }
-            },
-            MatchAlgorithm::Fuzzy => options
-                .match_algorithm
-                .matches_u8(it.suggestion.value.as_bytes(), prefix),
-        })
-        .collect()
-}

crates/nu-cli/src/completions/directory_completions.rs

@@ -2,7 +2,6 @@ use crate::completions::{
     completion_common::{adjust_if_intermediate, complete_item, AdjustView},
     Completer, CompletionOptions,
 };
-use nu_ansi_term::Style;
 use nu_protocol::{
     engine::{EngineState, Stack, StateWorkingSet},
     Span,
@@ -10,7 +9,7 @@ use nu_protocol::{
 use reedline::Suggestion;
 use std::path::Path;
 
-use super::SemanticSuggestion;
+use super::{completion_common::FileSuggestion, SemanticSuggestion};
 
 #[derive(Clone, Default)]
 pub struct DirectoryCompletion {}
@@ -47,11 +46,11 @@ impl Completer for DirectoryCompletion {
         .into_iter()
         .map(move |x| SemanticSuggestion {
             suggestion: Suggestion {
-                value: x.1,
+                value: x.path,
-                style: x.2,
+                style: x.style,
                 span: reedline::Span {
-                    start: x.0.start - offset,
+                    start: x.span.start - offset,
-                    end: x.0.end - offset,
+                    end: x.span.end - offset,
                 },
                 ..Suggestion::default()
             },
@@ -92,6 +91,6 @@ pub fn directory_completion(
     options: &CompletionOptions,
     engine_state: &EngineState,
     stack: &Stack,
-) -> Vec<(nu_protocol::Span, String, Option<Style>)> {
+) -> Vec<FileSuggestion> {
-    complete_item(true, span, partial, cwd, options, engine_state, stack)
+    complete_item(true, span, partial, &[cwd], options, engine_state, stack)
 }

crates/nu-cli/src/completions/dotnu_completions.rs

@@ -6,7 +6,7 @@ use nu_protocol::{
 use reedline::Suggestion;
 use std::path::{is_separator, Path, MAIN_SEPARATOR as SEP, MAIN_SEPARATOR_STR};
 
-use super::{completion_common::sort_suggestions, SemanticSuggestion};
+use super::SemanticSuggestion;
 
 #[derive(Clone, Default)]
 pub struct DotNuCompletion {}
@@ -87,13 +87,11 @@ impl Completer for DotNuCompletion {
 
         // Fetch the files filtering the ones that ends with .nu
         // and transform them into suggestions
-        let output: Vec<SemanticSuggestion> = search_dirs
+
-            .into_iter()
-            .flat_map(|search_dir| {
         let completions = file_path_completion(
             span,
             &partial,
-                    &search_dir,
+            &search_dirs.iter().map(|d| d.as_str()).collect::<Vec<_>>(),
             options,
             working_set.permanent_state,
             stack,
@@ -103,23 +101,23 @@ impl Completer for DotNuCompletion {
             .filter(move |it| {
                 // Different base dir, so we list the .nu files or folders
                 if !is_current_folder {
-                            it.1.ends_with(".nu") || it.1.ends_with(SEP)
+                    it.path.ends_with(".nu") || it.path.ends_with(SEP)
                 } else {
                     // Lib dirs, so we filter only the .nu files or directory modules
-                            if it.1.ends_with(SEP) {
+                    if it.path.ends_with(SEP) {
-                                Path::new(&search_dir).join(&it.1).join("mod.nu").exists()
+                        Path::new(&it.cwd).join(&it.path).join("mod.nu").exists()
                     } else {
-                                it.1.ends_with(".nu")
+                        it.path.ends_with(".nu")
                     }
                 }
             })
             .map(move |x| SemanticSuggestion {
                 suggestion: Suggestion {
-                            value: x.1,
+                    value: x.path,
-                            style: x.2,
+                    style: x.style,
                     span: reedline::Span {
-                                start: x.0.start - offset,
+                        start: x.span.start - offset,
-                                end: x.0.end - offset,
+                        end: x.span.end - offset,
                     },
                     append_whitespace: true,
                     ..Suggestion::default()
@@ -127,9 +125,6 @@ impl Completer for DotNuCompletion {
                 // TODO????
                 kind: None,
             })
-            })
+            .collect::<Vec<_>>()
-            .collect();
-
-        sort_suggestions(&prefix_str, output, options)
     }
 }

crates/nu-cli/src/completions/file_completions.rs

@@ -2,16 +2,14 @@ use crate::completions::{
     completion_common::{adjust_if_intermediate, complete_item, AdjustView},
     Completer, CompletionOptions,
 };
-use nu_ansi_term::Style;
 use nu_protocol::{
     engine::{EngineState, Stack, StateWorkingSet},
     Span,
 };
-use nu_utils::IgnoreCaseExt;
 use reedline::Suggestion;
 use std::path::Path;
 
-use super::SemanticSuggestion;
+use super::{completion_common::FileSuggestion, SemanticSuggestion};
 
 #[derive(Clone, Default)]
 pub struct FileCompletion {}
@@ -44,7 +42,7 @@ impl Completer for FileCompletion {
             readjusted,
             span,
             &prefix,
-            &working_set.permanent_state.current_work_dir(),
+            &[&working_set.permanent_state.current_work_dir()],
             options,
             working_set.permanent_state,
             stack,
@@ -52,11 +50,11 @@ impl Completer for FileCompletion {
         .into_iter()
         .map(move |x| SemanticSuggestion {
             suggestion: Suggestion {
-                value: x.1,
+                value: x.path,
-                style: x.2,
+                style: x.style,
                 span: reedline::Span {
-                    start: x.0.start - offset,
+                    start: x.span.start - offset,
-                    end: x.0.end - offset,
+                    end: x.span.end - offset,
                 },
                 ..Suggestion::default()
             },
@@ -95,21 +93,10 @@ impl Completer for FileCompletion {
 pub fn file_path_completion(
     span: nu_protocol::Span,
     partial: &str,
-    cwd: &str,
+    cwds: &[impl AsRef<str>],
     options: &CompletionOptions,
     engine_state: &EngineState,
     stack: &Stack,
-) -> Vec<(nu_protocol::Span, String, Option<Style>)> {
+) -> Vec<FileSuggestion> {
-    complete_item(false, span, partial, cwd, options, engine_state, stack)
+    complete_item(false, span, partial, cwds, options, engine_state, stack)
-}
-
-pub fn matches(partial: &str, from: &str, options: &CompletionOptions) -> bool {
-    // Check for case sensitive
-    if !options.case_sensitive {
-        return options
-            .match_algorithm
-            .matches_str(&from.to_folded_case(), &partial.to_folded_case());
-    }
-
-    options.match_algorithm.matches_str(from, partial)
 }

crates/nu-cli/src/completions/flag_completions.rs

@@ -1,4 +1,4 @@
-use crate::completions::{completion_common::sort_suggestions, Completer, CompletionOptions};
+use crate::completions::{completion_options::NuMatcher, Completer, CompletionOptions};
 use nu_protocol::{
     ast::{Expr, Expression},
     engine::{Stack, StateWorkingSet},
@@ -35,7 +35,7 @@ impl Completer for FlagCompletion {
             let decl = working_set.get_decl(call.decl_id);
             let sig = decl.signature();
 
-            let mut output = vec![];
+            let mut matcher = NuMatcher::new(String::from_utf8_lossy(prefix), options.clone());
 
             for named in &sig.named {
                 let flag_desc = &named.desc;
@@ -44,8 +44,7 @@ impl Completer for FlagCompletion {
                     short.encode_utf8(&mut named);
                     named.insert(0, b'-');
 
-                    if options.match_algorithm.matches_u8(&named, prefix) {
+                    matcher.add_semantic_suggestion(SemanticSuggestion {
-                        output.push(SemanticSuggestion {
                         suggestion: Suggestion {
                             value: String::from_utf8_lossy(&named).to_string(),
                             description: Some(flag_desc.to_string()),
@@ -60,7 +59,6 @@ impl Completer for FlagCompletion {
                         kind: None,
                     });
                 }
-                }
 
                 if named.long.is_empty() {
                     continue;
@@ -70,8 +68,7 @@ impl Completer for FlagCompletion {
                 named.insert(0, b'-');
                 named.insert(0, b'-');
 
-                if options.match_algorithm.matches_u8(&named, prefix) {
+                matcher.add_semantic_suggestion(SemanticSuggestion {
-                    output.push(SemanticSuggestion {
                     suggestion: Suggestion {
                         value: String::from_utf8_lossy(&named).to_string(),
                         description: Some(flag_desc.to_string()),
@@ -86,9 +83,8 @@ impl Completer for FlagCompletion {
                     kind: None,
                 });
             }
-            }
 
-            return sort_suggestions(&String::from_utf8_lossy(prefix), output, options);
+            return matcher.results();
         }
 
         vec![]

crates/nu-cli/src/completions/mod.rs

@@ -18,7 +18,7 @@ pub use completion_options::{CompletionOptions, MatchAlgorithm};
 pub use custom_completions::CustomCompletion;
 pub use directory_completions::DirectoryCompletion;
 pub use dotnu_completions::DotNuCompletion;
-pub use file_completions::{file_path_completion, matches, FileCompletion};
+pub use file_completions::{file_path_completion, FileCompletion};
 pub use flag_completions::FlagCompletion;
 pub use operator_completions::OperatorCompletion;
 pub use variable_completions::VariableCompletion;

crates/nu-cli/src/completions/operator_completions.rs

@@ -1,5 +1,5 @@
 use crate::completions::{
-    Completer, CompletionOptions, MatchAlgorithm, SemanticSuggestion, SuggestionKind,
+    completion_options::NuMatcher, Completer, CompletionOptions, SemanticSuggestion, SuggestionKind,
 };
 use nu_protocol::{
     ast::{Expr, Expression},
@@ -28,7 +28,7 @@ impl Completer for OperatorCompletion {
         span: Span,
         offset: usize,
         _pos: usize,
-        _options: &CompletionOptions,
+        options: &CompletionOptions,
     ) -> Vec<SemanticSuggestion> {
         //Check if int, float, or string
         let partial = std::str::from_utf8(working_set.get_span_contents(span)).unwrap_or("");
@@ -60,10 +60,6 @@ impl Completer for OperatorCompletion {
                 ("bit-shr", "Bitwise shift right"),
                 ("in", "Is a member of (doesn't use regex)"),
                 ("not-in", "Is not a member of (doesn't use regex)"),
-                (
-                    "++",
-                    "Appends two lists, a list and a value, two strings, or two binary values",
-                ),
             ],
             Expr::String(_) => vec![
                 ("=~", "Contains regex match"),
@@ -72,7 +68,7 @@ impl Completer for OperatorCompletion {
                 ("not-like", "Does not contain regex match"),
                 (
                     "++",
-                    "Appends two lists, a list and a value, two strings, or two binary values",
+                    "Concatenates two lists, two strings, or two binary values",
                 ),
                 ("in", "Is a member of (doesn't use regex)"),
                 ("not-in", "Is not a member of (doesn't use regex)"),
@@ -95,10 +91,6 @@ impl Completer for OperatorCompletion {
                 ("**", "Power of"),
                 ("in", "Is a member of (doesn't use regex)"),
                 ("not-in", "Is not a member of (doesn't use regex)"),
-                (
-                    "++",
-                    "Appends two lists, a list and a value, two strings, or two binary values",
-                ),
             ],
             Expr::Bool(_) => vec![
                 (
@@ -113,15 +105,11 @@ impl Completer for OperatorCompletion {
                 ("not", "Negates a value or expression"),
                 ("in", "Is a member of (doesn't use regex)"),
                 ("not-in", "Is not a member of (doesn't use regex)"),
-                (
-                    "++",
-                    "Appends two lists, a list and a value, two strings, or two binary values",
-                ),
             ],
             Expr::FullCellPath(path) => match path.head.expr {
                 Expr::List(_) => vec![(
                     "++",
-                    "Appends two lists, a list and a value, two strings, or two binary values",
+                    "Concatenates two lists, two strings, or two binary values",
                 )],
                 Expr::Var(id) => get_variable_completions(id, working_set),
                 _ => vec![],
@@ -129,17 +117,12 @@ impl Completer for OperatorCompletion {
             _ => vec![],
         };
 
-        let match_algorithm = MatchAlgorithm::Prefix;
+        let mut matcher = NuMatcher::new(partial, options.clone());
-        let input_fuzzy_search =
+        for (symbol, desc) in possible_operations.into_iter() {
-            |(operator, _): &(&str, &str)| match_algorithm.matches_str(operator, partial);
+            matcher.add_semantic_suggestion(SemanticSuggestion {
-
-        possible_operations
-            .into_iter()
-            .filter(input_fuzzy_search)
-            .map(move |x| SemanticSuggestion {
                 suggestion: Suggestion {
-                    value: x.0.to_string(),
+                    value: symbol.to_string(),
-                    description: Some(x.1.to_string()),
+                    description: Some(desc.to_string()),
                     span: reedline::Span::new(span.start - offset, span.end - offset),
                     append_whitespace: true,
                     ..Suggestion::default()
@@ -147,8 +130,9 @@ impl Completer for OperatorCompletion {
                 kind: Some(SuggestionKind::Command(
                     nu_protocol::engine::CommandType::Builtin,
                 )),
-            })
+            });
-            .collect()
+        }
+        matcher.results()
     }
 }
 
@@ -165,7 +149,7 @@ pub fn get_variable_completions<'a>(
         Type::List(_) | Type::String | Type::Binary => vec![
             (
                 "++=",
-                "Appends a list, a value, a string, or a binary value to a variable.",
+                "Concatenates two lists, two strings, or two binary values",
             ),
             ("=", "Assigns a value to a variable."),
         ],

crates/nu-cli/src/completions/variable_completions.rs

@@ -1,6 +1,4 @@
-use crate::completions::{
+use crate::completions::{Completer, CompletionOptions, SemanticSuggestion, SuggestionKind};
-    Completer, CompletionOptions, MatchAlgorithm, SemanticSuggestion, SuggestionKind,
-};
 use nu_engine::{column::get_columns, eval_variable};
 use nu_protocol::{
     engine::{Stack, StateWorkingSet},
@@ -9,7 +7,7 @@ use nu_protocol::{
 use reedline::Suggestion;
 use std::str;
 
-use super::completion_common::sort_suggestions;
+use super::completion_options::NuMatcher;
 
 #[derive(Clone)]
 pub struct VariableCompletion {
@@ -33,7 +31,6 @@ impl Completer for VariableCompletion {
         _pos: usize,
         options: &CompletionOptions,
     ) -> Vec<SemanticSuggestion> {
-        let mut output = vec![];
         let builtins = ["$nu", "$in", "$env"];
         let var_str = std::str::from_utf8(&self.var_context.0).unwrap_or("");
         let var_id = working_set.find_variable(&self.var_context.0);
@@ -43,6 +40,7 @@ impl Completer for VariableCompletion {
         };
         let sublevels_count = self.var_context.1.len();
         let prefix_str = String::from_utf8_lossy(prefix);
+        let mut matcher = NuMatcher::new(prefix_str, options.clone());
 
         // Completions for the given variable
         if !var_str.is_empty() {
@@ -63,26 +61,15 @@ impl Completer for VariableCompletion {
 
                     if let Some(val) = env_vars.get(&target_var_str) {
                         for suggestion in nested_suggestions(val, &nested_levels, current_span) {
-                            if options.match_algorithm.matches_u8_insensitive(
+                            matcher.add_semantic_suggestion(suggestion);
-                                options.case_sensitive,
-                                suggestion.suggestion.value.as_bytes(),
-                                prefix,
-                            ) {
-                                output.push(suggestion);
-                            }
                         }
 
-                        return sort_suggestions(&prefix_str, output, options);
+                        return matcher.results();
                     }
                 } else {
                     // No nesting provided, return all env vars
                     for env_var in env_vars {
-                        if options.match_algorithm.matches_u8_insensitive(
+                        matcher.add_semantic_suggestion(SemanticSuggestion {
-                            options.case_sensitive,
-                            env_var.0.as_bytes(),
-                            prefix,
-                        ) {
-                            output.push(SemanticSuggestion {
                             suggestion: Suggestion {
                                 value: env_var.0,
                                 span: current_span,
@@ -91,9 +78,8 @@ impl Completer for VariableCompletion {
                             kind: Some(SuggestionKind::Type(env_var.1.get_type())),
                         });
                     }
-                    }
 
-                    return sort_suggestions(&prefix_str, output, options);
+                    return matcher.results();
                 }
             }
 
@@ -108,16 +94,10 @@ impl Completer for VariableCompletion {
                 ) {
                     for suggestion in nested_suggestions(&nuval, &self.var_context.1, current_span)
                     {
-                        if options.match_algorithm.matches_u8_insensitive(
+                        matcher.add_semantic_suggestion(suggestion);
-                            options.case_sensitive,
-                            suggestion.suggestion.value.as_bytes(),
-                            prefix,
-                        ) {
-                            output.push(suggestion);
-                        }
                     }
 
-                    return sort_suggestions(&prefix_str, output, options);
+                    return matcher.results();
                 }
             }
 
@@ -130,28 +110,17 @@ impl Completer for VariableCompletion {
                 if let Ok(value) = var {
                     for suggestion in nested_suggestions(&value, &self.var_context.1, current_span)
                     {
-                        if options.match_algorithm.matches_u8_insensitive(
+                        matcher.add_semantic_suggestion(suggestion);
-                            options.case_sensitive,
-                            suggestion.suggestion.value.as_bytes(),
-                            prefix,
-                        ) {
-                            output.push(suggestion);
-                        }
                     }
 
-                    return sort_suggestions(&prefix_str, output, options);
+                    return matcher.results();
                 }
             }
         }
 
         // Variable completion (e.g: $en<tab> to complete $env)
         for builtin in builtins {
-            if options.match_algorithm.matches_u8_insensitive(
+            matcher.add_semantic_suggestion(SemanticSuggestion {
-                options.case_sensitive,
-                builtin.as_bytes(),
-                prefix,
-            ) {
-                output.push(SemanticSuggestion {
                 suggestion: Suggestion {
                     value: builtin.to_string(),
                     span: current_span,
@@ -161,7 +130,6 @@ impl Completer for VariableCompletion {
                 kind: None,
             });
         }
-        }
 
         // TODO: The following can be refactored (see find_commands_by_predicate() used in
         // command_completions).
@@ -170,12 +138,7 @@ impl Completer for VariableCompletion {
         for scope_frame in working_set.delta.scope.iter().rev() {
             for overlay_frame in scope_frame.active_overlays(&mut removed_overlays).rev() {
                 for v in &overlay_frame.vars {
-                    if options.match_algorithm.matches_u8_insensitive(
+                    matcher.add_semantic_suggestion(SemanticSuggestion {
-                        options.case_sensitive,
-                        v.0,
-                        prefix,
-                    ) {
-                        output.push(SemanticSuggestion {
                         suggestion: Suggestion {
                             value: String::from_utf8_lossy(v.0).to_string(),
                             span: current_span,
@@ -188,7 +151,6 @@ impl Completer for VariableCompletion {
                 }
             }
         }
-        }
 
         // Permanent state vars
         // for scope in &self.engine_state.scope {
@@ -198,12 +160,7 @@ impl Completer for VariableCompletion {
             .rev()
         {
             for v in &overlay_frame.vars {
-                if options.match_algorithm.matches_u8_insensitive(
+                matcher.add_semantic_suggestion(SemanticSuggestion {
-                    options.case_sensitive,
-                    v.0,
-                    prefix,
-                ) {
-                    output.push(SemanticSuggestion {
                     suggestion: Suggestion {
                         value: String::from_utf8_lossy(v.0).to_string(),
                         span: current_span,
@@ -215,13 +172,8 @@ impl Completer for VariableCompletion {
                 });
             }
         }
-        }
 
-        output = sort_suggestions(&prefix_str, output, options);
+        matcher.results()
-
-        output.dedup(); // TODO: Removes only consecutive duplicates, is it intended?
-
-        output
     }
 }
 
@@ -302,13 +254,3 @@ fn recursive_value(val: &Value, sublevels: &[Vec<u8>]) -> Result<Value, Span> {
         Ok(val.clone())
     }
 }
-
-impl MatchAlgorithm {
-    pub fn matches_u8_insensitive(&self, sensitive: bool, haystack: &[u8], needle: &[u8]) -> bool {
-        if sensitive {
-            self.matches_u8(haystack, needle)
-        } else {
-            self.matches_u8(&haystack.to_ascii_lowercase(), &needle.to_ascii_lowercase())
-        }
-    }
-}

crates/nu-cli/src/eval_cmds.rs

@@ -9,6 +9,8 @@ use nu_protocol::{
 };
 use std::sync::Arc;
 
+use crate::util::print_pipeline;
+
 #[derive(Default)]
 pub struct EvaluateCommandsOpts {
     pub table_mode: Option<Value>,
@@ -72,7 +74,7 @@ pub fn evaluate_commands(
 
         if let Some(err) = working_set.compile_errors.first() {
             report_compile_error(&working_set, err);
-            // Not a fatal error, for now
+            std::process::exit(1);
         }
 
         (output, working_set.render())
@@ -93,7 +95,7 @@ pub fn evaluate_commands(
             t_mode.coerce_str()?.parse().unwrap_or_default();
     }
 
-    pipeline.print(engine_state, stack, no_newline, false)?;
+    print_pipeline(engine_state, stack, pipeline, no_newline)?;
 
     info!("evaluate {}:{}:{}", file!(), line!(), column!());
 

crates/nu-cli/src/eval_file.rs

@@ -1,4 +1,4 @@
-use crate::util::eval_source;
+use crate::util::{eval_source, print_pipeline};
 use log::{info, trace};
 use nu_engine::{convert_env_values, eval_block};
 use nu_parser::parse;
@@ -89,7 +89,7 @@ pub fn evaluate_file(
 
     if let Some(err) = working_set.compile_errors.first() {
         report_compile_error(&working_set, err);
-        // Not a fatal error, for now
+        std::process::exit(1);
     }
 
     // Look for blocks whose name starts with "main" and replace it with the filename.
@@ -119,7 +119,7 @@ pub fn evaluate_file(
             };
 
         // Print the pipeline output of the last command of the file.
-        pipeline.print(engine_state, stack, true, false)?;
+        print_pipeline(engine_state, stack, pipeline, true)?;
 
         // Invoke the main command with arguments.
         // Arguments with whitespaces are quoted, thus can be safely concatenated by whitespace.

crates/nu-cli/src/print.rs

@@ -65,8 +65,12 @@ Since this command has no output, there is no point in piping it with other comm
                     arg.into_pipeline_data()
                         .print_raw(engine_state, no_newline, to_stderr)?;
                 } else {
-                    arg.into_pipeline_data()
+                    arg.into_pipeline_data().print_table(
-                        .print(engine_state, stack, no_newline, to_stderr)?;
+                        engine_state,
+                        stack,
+                        no_newline,
+                        to_stderr,
+                    )?;
                 }
             }
         } else if !input.is_nothing() {
@@ -78,7 +82,7 @@ Since this command has no output, there is no point in piping it with other comm
             if raw {
                 input.print_raw(engine_state, no_newline, to_stderr)?;
             } else {
-                input.print(engine_state, stack, no_newline, to_stderr)?;
+                input.print_table(engine_state, stack, no_newline, to_stderr)?;
             }
         }
 

crates/nu-cli/src/util.rs

@@ -201,6 +201,35 @@ fn gather_env_vars(
     }
 }
 
+/// Print a pipeline with formatting applied based on display_output hook.
+///
+/// This function should be preferred when printing values resulting from a completed evaluation.
+/// For values printed as part of a command's execution, such as values printed by the `print` command,
+/// the `PipelineData::print_table` function should be preferred instead as it is not config-dependent.
+///
+/// `no_newline` controls if we need to attach newline character to output.
+pub fn print_pipeline(
+    engine_state: &mut EngineState,
+    stack: &mut Stack,
+    pipeline: PipelineData,
+    no_newline: bool,
+) -> Result<(), ShellError> {
+    if let Some(hook) = engine_state.get_config().hooks.display_output.clone() {
+        let pipeline = eval_hook(
+            engine_state,
+            stack,
+            Some(pipeline),
+            vec![],
+            &hook,
+            "display_output",
+        )?;
+        pipeline.print_raw(engine_state, no_newline, false)
+    } else {
+        // if display_output isn't set, we should still prefer to print with some formatting
+        pipeline.print_table(engine_state, stack, no_newline, false)
+    }
+}
+
 pub fn eval_source(
     engine_state: &mut EngineState,
     stack: &mut Stack,
@@ -267,7 +296,7 @@ fn evaluate_source(
 
         if let Some(err) = working_set.compile_errors.first() {
             report_compile_error(&working_set, err);
-            // Not a fatal error, for now
+            return Ok(true);
         }
 
         (output, working_set.render())
@@ -281,36 +310,12 @@ fn evaluate_source(
         eval_block::<WithoutDebug>(engine_state, stack, &block, input)
     }?;
 
-    if let PipelineData::ByteStream(..) = pipeline {
+    let no_newline = matches!(&pipeline, &PipelineData::ByteStream(..));
-        // run the display hook on bytestreams too
+    print_pipeline(engine_state, stack, pipeline, no_newline)?;
-        run_display_hook(engine_state, stack, pipeline, false)
-    } else {
-        run_display_hook(engine_state, stack, pipeline, true)
-    }?;
 
     Ok(false)
 }
 
-fn run_display_hook(
-    engine_state: &mut EngineState,
-    stack: &mut Stack,
-    pipeline: PipelineData,
-    no_newline: bool,
-) -> Result<(), ShellError> {
-    if let Some(hook) = engine_state.get_config().hooks.display_output.clone() {
-        let pipeline = eval_hook(
-            engine_state,
-            stack,
-            Some(pipeline),
-            vec![],
-            &hook,
-            "display_output",
-        )?;
-        pipeline.print(engine_state, stack, no_newline, false)
-    } else {
-        pipeline.print(engine_state, stack, no_newline, false)
-    }
-}
 #[cfg(test)]
 mod test {
     use super::*;

crates/nu-cli/tests/completions/mod.rs

@@ -890,8 +890,8 @@ fn subcommand_completions(mut subcommand_completer: NuCompleter) {
     match_suggestions(
         &vec![
             "foo bar".to_string(),
-            "foo aabcrr".to_string(),
             "foo abaz".to_string(),
+            "foo aabcrr".to_string(),
         ],
         &suggestions,
     );
@@ -955,8 +955,8 @@ fn flag_completions() {
         "--mime-type".into(),
         "--short-names".into(),
         "--threads".into(),
-        "-D".into(),
         "-a".into(),
+        "-D".into(),
         "-d".into(),
         "-f".into(),
         "-h".into(),
@@ -1287,7 +1287,7 @@ fn variables_completions() {
     assert_eq!(3, suggestions.len());
 
     #[cfg(windows)]
-    let expected: Vec<String> = vec!["PWD".into(), "Path".into(), "TEST".into()];
+    let expected: Vec<String> = vec!["Path".into(), "PWD".into(), "TEST".into()];
     #[cfg(not(windows))]
     let expected: Vec<String> = vec!["PATH".into(), "PWD".into(), "TEST".into()];
 
@@ -1576,6 +1576,23 @@ fn sort_fuzzy_completions_in_alphabetical_order(mut fuzzy_alpha_sort_completer:
     );
 }
 
+#[test]
+fn exact_match() {
+    let (dir, _, engine, stack) = new_partial_engine();
+
+    let mut completer = NuCompleter::new(Arc::new(engine), Arc::new(stack));
+
+    let target_dir = format!("open {}", folder(dir.join("pArTiAL")));
+    let suggestions = completer.complete(&target_dir, target_dir.len());
+
+    // Since it's an exact match, only 'partial' should be suggested, not
+    // 'partial-a' and stuff. Implemented in #13302
+    match_suggestions(
+        &vec![file(dir.join("partial").join("hello.txt"))],
+        &suggestions,
+    );
+}
+
 #[ignore = "was reverted, still needs fixing"]
 #[rstest]
 fn alias_offset_bug_7648() {

crates/nu-cmd-lang/Cargo.toml

@@ -21,10 +21,10 @@ nu-protocol = { path = "../nu-protocol", version = "0.100.1" }
 nu-utils = { path = "../nu-utils", version = "0.100.1" }
 
 itertools = { workspace = true }
-shadow-rs = { version = "0.35", default-features = false }
+shadow-rs = { version = "0.36", default-features = false }
 
 [build-dependencies]
-shadow-rs = { version = "0.35", default-features = false }
+shadow-rs = { version = "0.36", default-features = false }
 
 [features]
 mimalloc = []

crates/nu-cmd-lang/src/core_commands/do_.rs

@@ -69,6 +69,33 @@ impl Command for Do {
         let block: Closure = call.req(engine_state, caller_stack, 0)?;
         let rest: Vec<Value> = call.rest(engine_state, caller_stack, 1)?;
         let ignore_all_errors = call.has_flag(engine_state, caller_stack, "ignore-errors")?;
+
+        if call.has_flag(engine_state, caller_stack, "ignore-shell-errors")? {
+            nu_protocol::report_shell_warning(
+                engine_state,
+                &ShellError::GenericError {
+                    error: "Deprecated option".into(),
+                    msg: "`--ignore-shell-errors` is deprecated and will be removed in 0.102.0."
+                        .into(),
+                    span: Some(call.head),
+                    help: Some("Please use the `--ignore-errors(-i)`".into()),
+                    inner: vec![],
+                },
+            );
+        }
+        if call.has_flag(engine_state, caller_stack, "ignore-program-errors")? {
+            nu_protocol::report_shell_warning(
+                engine_state,
+                &ShellError::GenericError {
+                    error: "Deprecated option".into(),
+                    msg: "`--ignore-program-errors` is deprecated and will be removed in 0.102.0."
+                        .into(),
+                    span: Some(call.head),
+                    help: Some("Please use the `--ignore-errors(-i)`".into()),
+                    inner: vec![],
+                },
+            );
+        }
         let ignore_shell_errors = ignore_all_errors
             || call.has_flag(engine_state, caller_stack, "ignore-shell-errors")?;
         let ignore_program_errors = ignore_all_errors
@@ -208,16 +235,6 @@ impl Command for Do {
                 example: r#"do --ignore-errors { thisisnotarealcommand }"#,
                 result: None,
             },
-            Example {
-                description: "Run the closure and ignore shell errors",
-                example: r#"do --ignore-shell-errors { thisisnotarealcommand }"#,
-                result: None,
-            },
-            Example {
-                description: "Run the closure and ignore external program errors",
-                example: r#"do --ignore-program-errors { nu --commands 'exit 1' }; echo "I'll still run""#,
-                result: None,
-            },
             Example {
                 description: "Abort the pipeline if a program returns a non-zero exit code",
                 example: r#"do --capture-errors { nu --commands 'exit 1' } | myscarycommand"#,

crates/nu-command/Cargo.toml

@@ -86,7 +86,6 @@ serde_yaml = { workspace = true }
 sha2 = { workspace = true }
 sysinfo = { workspace = true }
 tabled = { workspace = true, features = ["ansi"], default-features = false }
-terminal_size = { workspace = true }
 titlecase = { workspace = true }
 toml = { workspace = true, features = ["preserve_order"] }
 unicode-segmentation = { workspace = true }
@@ -96,6 +95,7 @@ uu_cp = { workspace = true }
 uu_mkdir = { workspace = true }
 uu_mktemp = { workspace = true }
 uu_mv = { workspace = true }
+uu_touch = { workspace = true }
 uu_uname = { workspace = true }
 uu_whoami = { workspace = true }
 uuid = { workspace = true, features = ["v4"] }

crates/nu-command/src/database/commands/into_sqlite.rs

@@ -359,7 +359,6 @@ fn nu_value_to_sqlite_type(val: &Value) -> Result<&'static str, ShellError> {
         | Type::Custom(_)
         | Type::Error
         | Type::List(_)
-        | Type::ListStream
         | Type::Range
         | Type::Record(_)
         | Type::Signature

crates/nu-command/src/debug/ast.rs

@@ -1,6 +1,7 @@
 use nu_engine::command_prelude::*;
-use nu_parser::parse;
+use nu_parser::{flatten_block, parse};
-use nu_protocol::engine::StateWorkingSet;
+use nu_protocol::{engine::StateWorkingSet, record};
+use serde_json::{json, Value as JsonValue};
 
 #[derive(Clone)]
 pub struct Ast;
@@ -16,18 +17,120 @@ impl Command for Ast {
 
     fn signature(&self) -> Signature {
         Signature::build("ast")
-            .input_output_types(vec![(Type::String, Type::record())])
+            .input_output_types(vec![
+                (Type::Nothing, Type::table()),
+                (Type::Nothing, Type::record()),
+                (Type::Nothing, Type::String),
+            ])
             .required(
                 "pipeline",
                 SyntaxShape::String,
                 "The pipeline to print the ast for.",
             )
-            .switch("json", "serialize to json", Some('j'))
+            .switch("json", "Serialize to json", Some('j'))
-            .switch("minify", "minify the nuon or json output", Some('m'))
+            .switch("minify", "Minify the nuon or json output", Some('m'))
+            .switch("flatten", "An easier to read version of the ast", Some('f'))
             .allow_variants_without_examples(true)
             .category(Category::Debug)
     }
 
+    fn examples(&self) -> Vec<Example> {
+        vec![
+            Example {
+                description: "Print the ast of a string",
+                example: "ast 'hello'",
+                result: None,
+            },
+            Example {
+                description: "Print the ast of a pipeline",
+                example: "ast 'ls | where name =~ README'",
+                result: None,
+            },
+            Example {
+                description: "Print the ast of a pipeline with an error",
+                example: "ast 'for x in 1..10 { echo $x '",
+                result: None,
+            },
+            Example {
+                description:
+                    "Print the ast of a pipeline with an error, as json, in a nushell table",
+                example: "ast 'for x in 1..10 { echo $x ' --json | get block | from json",
+                result: None,
+            },
+            Example {
+                description: "Print the ast of a pipeline with an error, as json, minified",
+                example: "ast 'for x in 1..10 { echo $x ' --json --minify",
+                result: None,
+            },
+            Example {
+                description: "Print the ast of a string flattened",
+                example: r#"ast "'hello'" --flatten"#,
+                result: Some(Value::test_list(vec![Value::test_record(record! {
+                    "content" => Value::test_string("'hello'"),
+                    "shape" => Value::test_string("shape_string"),
+                    "span" => Value::test_record(record! {
+                        "start" => Value::test_int(0),
+                        "end" => Value::test_int(7),}),
+                })])),
+            },
+            Example {
+                description: "Print the ast of a string flattened, as json, minified",
+                example: r#"ast "'hello'" --flatten --json --minify"#,
+                result: Some(Value::test_string(
+                    r#"[{"content":"'hello'","shape":"shape_string","span":{"start":0,"end":7}}]"#,
+                )),
+            },
+            Example {
+                description: "Print the ast of a pipeline flattened",
+                example: r#"ast 'ls | sort-by type name -i' --flatten"#,
+                result: Some(Value::test_list(vec![
+                    Value::test_record(record! {
+                        "content" => Value::test_string("ls"),
+                        "shape" => Value::test_string("shape_external"),
+                        "span" => Value::test_record(record! {
+                            "start" => Value::test_int(0),
+                            "end" => Value::test_int(2),}),
+                    }),
+                    Value::test_record(record! {
+                        "content" => Value::test_string("|"),
+                        "shape" => Value::test_string("shape_pipe"),
+                        "span" => Value::test_record(record! {
+                            "start" => Value::test_int(3),
+                            "end" => Value::test_int(4),}),
+                    }),
+                    Value::test_record(record! {
+                        "content" => Value::test_string("sort-by"),
+                        "shape" => Value::test_string("shape_internalcall"),
+                        "span" => Value::test_record(record! {
+                            "start" => Value::test_int(5),
+                            "end" => Value::test_int(12),}),
+                    }),
+                    Value::test_record(record! {
+                        "content" => Value::test_string("type"),
+                        "shape" => Value::test_string("shape_string"),
+                        "span" => Value::test_record(record! {
+                            "start" => Value::test_int(13),
+                            "end" => Value::test_int(17),}),
+                    }),
+                    Value::test_record(record! {
+                        "content" => Value::test_string("name"),
+                        "shape" => Value::test_string("shape_string"),
+                        "span" => Value::test_record(record! {
+                            "start" => Value::test_int(18),
+                            "end" => Value::test_int(22),}),
+                    }),
+                    Value::test_record(record! {
+                        "content" => Value::test_string("-i"),
+                        "shape" => Value::test_string("shape_flag"),
+                        "span" => Value::test_record(record! {
+                            "start" => Value::test_int(23),
+                            "end" => Value::test_int(25),}),
+                    }),
+                ])),
+            },
+        ]
+    }
+
     fn run(
         &self,
         engine_state: &EngineState,
@@ -38,19 +141,81 @@ impl Command for Ast {
         let pipeline: Spanned<String> = call.req(engine_state, stack, 0)?;
         let to_json = call.has_flag(engine_state, stack, "json")?;
         let minify = call.has_flag(engine_state, stack, "minify")?;
+        let flatten = call.has_flag(engine_state, stack, "flatten")?;
+
         let mut working_set = StateWorkingSet::new(engine_state);
-        let block_output = parse(&mut working_set, None, pipeline.item.as_bytes(), false);
+        let offset = working_set.next_span_start();
+        let parsed_block = parse(&mut working_set, None, pipeline.item.as_bytes(), false);
+
+        if flatten {
+            let flat = flatten_block(&working_set, &parsed_block);
+            if to_json {
+                let mut json_val: JsonValue = json!([]);
+                for (span, shape) in flat {
+                    let content =
+                        String::from_utf8_lossy(working_set.get_span_contents(span)).to_string();
+
+                    let json = json!(
+                        {
+                            "content": content,
+                            "shape": shape.to_string(),
+                            "span": {
+                                "start": span.start.checked_sub(offset),
+                                "end": span.end.checked_sub(offset),
+                            },
+                        }
+                    );
+                    json_merge(&mut json_val, &json);
+                }
+                let json_string = if minify {
+                    if let Ok(json_str) = serde_json::to_string(&json_val) {
+                        json_str
+                    } else {
+                        "{}".to_string()
+                    }
+                } else if let Ok(json_str) = serde_json::to_string_pretty(&json_val) {
+                    json_str
+                } else {
+                    "{}".to_string()
+                };
+
+                Ok(Value::string(json_string, pipeline.span).into_pipeline_data())
+            } else {
+                // let mut rec: Record = Record::new();
+                let mut rec = vec![];
+                for (span, shape) in flat {
+                    let content =
+                        String::from_utf8_lossy(working_set.get_span_contents(span)).to_string();
+                    let each_rec = record! {
+                        "content" => Value::test_string(content),
+                        "shape" => Value::test_string(shape.to_string()),
+                        "span" => Value::test_record(record!{
+                            "start" => Value::test_int(match span.start.checked_sub(offset) {
+                                Some(start) => start as i64,
+                                None => 0
+                            }),
+                            "end" => Value::test_int(match span.end.checked_sub(offset) {
+                                Some(end) => end as i64,
+                                None => 0
+                            }),
+                        }),
+                    };
+                    rec.push(Value::test_record(each_rec));
+                }
+                Ok(Value::list(rec, pipeline.span).into_pipeline_data())
+            }
+        } else {
             let error_output = working_set.parse_errors.first();
-        let block_span = match &block_output.span {
+            let block_span = match &parsed_block.span {
                 Some(span) => span,
                 None => &pipeline.span,
             };
             if to_json {
                 // Get the block as json
                 let serde_block_str = if minify {
-                serde_json::to_string(&*block_output)
+                    serde_json::to_string(&*parsed_block)
                 } else {
-                serde_json::to_string_pretty(&*block_output)
+                    serde_json::to_string_pretty(&*parsed_block)
                 };
                 let block_json = match serde_block_str {
                     Ok(json) => json,
@@ -59,7 +224,7 @@ impl Command for Ast {
                         from_type: "block".to_string(),
                         span: *block_span,
                         help: Some(format!(
-                        "Error: {e}\nCan't convert {block_output:?} to string"
+                            "Error: {e}\nCan't convert {parsed_block:?} to string"
                         )),
                     })?,
                 };
@@ -94,9 +259,9 @@ impl Command for Ast {
             } else {
                 let block_value = Value::string(
                     if minify {
-                    format!("{block_output:?}")
+                        format!("{parsed_block:?}")
                     } else {
-                    format!("{block_output:#?}")
+                        format!("{parsed_block:#?}")
                     },
                     pipeline.span,
                 );
@@ -118,36 +283,25 @@ impl Command for Ast {
                 Ok(output_record.into_pipeline_data())
             }
         }
+    }
+}
 
-    fn examples(&self) -> Vec<Example> {
+fn json_merge(a: &mut JsonValue, b: &JsonValue) {
-        vec![
+    match (a, b) {
-            Example {
+        (JsonValue::Object(ref mut a), JsonValue::Object(b)) => {
-                description: "Print the ast of a string",
+            for (k, v) in b {
-                example: "ast 'hello'",
+                json_merge(a.entry(k).or_insert(JsonValue::Null), v);
-                result: None,
+            }
-            },
+        }
-            Example {
+        (JsonValue::Array(ref mut a), JsonValue::Array(b)) => {
-                description: "Print the ast of a pipeline",
+            a.extend(b.clone());
-                example: "ast 'ls | where name =~ README'",
+        }
-                result: None,
+        (JsonValue::Array(ref mut a), JsonValue::Object(b)) => {
-            },
+            a.extend([JsonValue::Object(b.clone())]);
-            Example {
+        }
-                description: "Print the ast of a pipeline with an error",
+        (a, b) => {
-                example: "ast 'for x in 1..10 { echo $x '",
+            *a = b.clone();
-                result: None,
+        }
-            },
-            Example {
-                description:
-                    "Print the ast of a pipeline with an error, as json, in a nushell table",
-                example: "ast 'for x in 1..10 { echo $x ' --json | get block | from json",
-                result: None,
-            },
-            Example {
-                description: "Print the ast of a pipeline with an error, as json, minified",
-                example: "ast 'for x in 1..10 { echo $x ' --json --minify",
-                result: None,
-            },
-        ]
     }
 }
 

crates/nu-command/src/debug/inspect.rs

@@ -1,6 +1,6 @@
 use super::inspect_table;
+use crossterm::terminal::size;
 use nu_engine::command_prelude::*;
-use terminal_size::{terminal_size, Height, Width};
 
 #[derive(Clone)]
 pub struct Inspect;
@@ -38,12 +38,9 @@ impl Command for Inspect {
         let original_input = input_val.clone();
         let description = input_val.get_type().to_string();
 
-        let (cols, _rows) = match terminal_size() {
+        let (cols, _rows) = size().unwrap_or((0, 0));
-            Some((w, h)) => (Width(w.0), Height(h.0)),
-            None => (Width(0), Height(0)),
-        };
 
-        let table = inspect_table::build_table(input_val, description, cols.0 as usize);
+        let table = inspect_table::build_table(input_val, description, cols as usize);
 
         // Note that this is printed to stderr. The reason for this is so it doesn't disrupt the regular nushell
         // tabular output. If we printed to stdout, nushell would get confused with two outputs.

crates/nu-command/src/default_context.rs

@@ -230,6 +230,7 @@ pub fn add_shell_command_context(mut engine_state: EngineState) -> EngineState {
             Rm,
             Save,
             Touch,
+            UTouch,
             Glob,
             Watch,
         };
@@ -247,7 +248,9 @@ pub fn add_shell_command_context(mut engine_state: EngineState) -> EngineState {
             IsTerminal,
             Kill,
             Sleep,
+            Term,
             TermSize,
+            TermQuery,
             Whoami,
         };
 

crates/nu-command/src/env/config/config_env.rs

@@ -15,7 +15,16 @@ impl Command for ConfigEnv {
         Signature::build(self.name())
             .category(Category::Env)
             .input_output_types(vec![(Type::Nothing, Type::Any)])
-            .switch("default", "Print default `env.nu` file instead.", Some('d'))
+            .switch(
+                "default",
+                "Print the internal default `env.nu` file instead.",
+                Some('d'),
+            )
+            .switch(
+                "sample",
+                "Print a commented, sample `env.nu` file instead.",
+                Some('s'),
+            )
         // TODO: Signature narrower than what run actually supports theoretically
     }
 
@@ -26,18 +35,18 @@ impl Command for ConfigEnv {
     fn examples(&self) -> Vec<Example> {
         vec![
             Example {
-                description: "allow user to open and update nu env",
+                description: "open user's env.nu in the default editor",
                 example: "config env",
                 result: None,
             },
             Example {
-                description: "allow user to print default `env.nu` file",
+                description: "pretty-print a commented, sample `env.nu` that explains common settings",
-                example: "config env --default,",
+                example: "config env --sample | nu-highlight,",
                 result: None,
             },
             Example {
-                description: "allow saving the default `env.nu` locally",
+                description: "pretty-print the internal `env.nu` file which is loaded before the user's environment",
-                example: "config env --default | save -f ~/.config/nushell/default_env.nu",
+                example: "config env --default | nu-highlight,",
                 result: None,
             },
         ]
@@ -50,12 +59,28 @@ impl Command for ConfigEnv {
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
+        let default_flag = call.has_flag(engine_state, stack, "default")?;
+        let sample_flag = call.has_flag(engine_state, stack, "sample")?;
+        if default_flag && sample_flag {
+            return Err(ShellError::IncompatibleParameters {
+                left_message: "can't use `--default` at the same time".into(),
+                left_span: call.get_flag_span(stack, "default").expect("has flag"),
+                right_message: "because of `--sample`".into(),
+                right_span: call.get_flag_span(stack, "sample").expect("has flag"),
+            });
+        }
         // `--default` flag handling
         if call.has_flag(engine_state, stack, "default")? {
             let head = call.head;
             return Ok(Value::string(nu_utils::get_default_env(), head).into_pipeline_data());
         }
 
+        // `--sample` flag handling
+        if sample_flag {
+            let head = call.head;
+            return Ok(Value::string(nu_utils::get_sample_env(), head).into_pipeline_data());
+        }
+
         // Find the editor executable.
         let (editor_name, editor_args) = get_editor(engine_state, stack, call.head)?;
         let paths = nu_engine::env::path_str(engine_state, stack, call.head)?;

crates/nu-command/src/env/config/config_nu.rs

@@ -17,9 +17,14 @@ impl Command for ConfigNu {
             .input_output_types(vec![(Type::Nothing, Type::Any)])
             .switch(
                 "default",
-                "Print default `config.nu` file instead.",
+                "Print the internal default `config.nu` file instead.",
                 Some('d'),
             )
+            .switch(
+                "sample",
+                "Print a commented, sample `config.nu` file instead.",
+                Some('s'),
+            )
         // TODO: Signature narrower than what run actually supports theoretically
     }
 
@@ -30,18 +35,19 @@ impl Command for ConfigNu {
     fn examples(&self) -> Vec<Example> {
         vec![
             Example {
-                description: "allow user to open and update nu config",
+                description: "open user's config.nu in the default editor",
                 example: "config nu",
                 result: None,
             },
             Example {
-                description: "allow user to print default `config.nu` file",
+                description: "pretty-print a commented, sample `config.nu` that explains common settings",
-                example: "config nu --default,",
+                example: "config nu --sample | nu-highlight",
                 result: None,
             },
             Example {
-                description: "allow saving the default `config.nu` locally",
+                description:
-                example: "config nu --default | save -f ~/.config/nushell/default_config.nu",
+                    "pretty-print the internal `config.nu` file which is loaded before user's config",
+                example: "config nu --default | nu-highlight",
                 result: None,
             },
         ]
@@ -54,12 +60,29 @@ impl Command for ConfigNu {
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
+        let default_flag = call.has_flag(engine_state, stack, "default")?;
+        let sample_flag = call.has_flag(engine_state, stack, "sample")?;
+        if default_flag && sample_flag {
+            return Err(ShellError::IncompatibleParameters {
+                left_message: "can't use `--default` at the same time".into(),
+                left_span: call.get_flag_span(stack, "default").expect("has flag"),
+                right_message: "because of `--sample`".into(),
+                right_span: call.get_flag_span(stack, "sample").expect("has flag"),
+            });
+        }
+
         // `--default` flag handling
-        if call.has_flag(engine_state, stack, "default")? {
+        if default_flag {
             let head = call.head;
             return Ok(Value::string(nu_utils::get_default_config(), head).into_pipeline_data());
         }
 
+        // `--sample` flag handling
+        if sample_flag {
+            let head = call.head;
+            return Ok(Value::string(nu_utils::get_sample_config(), head).into_pipeline_data());
+        }
+
         // Find the editor executable.
         let (editor_name, editor_args) = get_editor(engine_state, stack, call.head)?;
         let paths = nu_engine::env::path_str(engine_state, stack, call.head)?;

crates/nu-command/src/filesystem/mod.rs

@@ -12,6 +12,7 @@ mod ucp;
 mod umkdir;
 mod umv;
 mod util;
+mod utouch;
 mod watch;
 
 pub use self::open::Open;
@@ -27,4 +28,5 @@ pub use touch::Touch;
 pub use ucp::UCp;
 pub use umkdir::UMkdir;
 pub use umv::UMv;
+pub use utouch::UTouch;
 pub use watch::Watch;

crates/nu-command/src/filesystem/umv.rs

@@ -188,6 +188,7 @@ impl Command for UMv {
             target_dir: None,
             no_target_dir: false,
             strip_slashes: false,
+            debug: false,
         };
         if let Err(error) = uu_mv::mv(&files, &options) {
             return Err(ShellError::GenericError {

crates/nu-command/src/filesystem/utouch.rs

@@ -0,0 +1,268 @@
+use std::io::ErrorKind;
+use std::path::PathBuf;
+
+use chrono::{DateTime, FixedOffset};
+use filetime::FileTime;
+
+use nu_engine::CallExt;
+use nu_path::expand_path_with;
+use nu_protocol::engine::{Call, Command, EngineState, Stack};
+use nu_protocol::{
+    Category, Example, NuGlob, PipelineData, ShellError, Signature, Spanned, SyntaxShape, Type,
+};
+use uu_touch::error::TouchError;
+use uu_touch::{ChangeTimes, InputFile, Options, Source};
+
+use super::util::get_rest_for_glob_pattern;
+
+#[derive(Clone)]
+pub struct UTouch;
+
+impl Command for UTouch {
+    fn name(&self) -> &str {
+        "utouch"
+    }
+
+    fn search_terms(&self) -> Vec<&str> {
+        vec!["create", "file"]
+    }
+
+    fn signature(&self) -> Signature {
+        Signature::build("utouch")
+            .input_output_types(vec![ (Type::Nothing, Type::Nothing) ])
+            .rest(
+                "files",
+                SyntaxShape::OneOf(vec![SyntaxShape::GlobPattern, SyntaxShape::Filepath]),
+                "The file(s) to create. '-' is used to represent stdout."
+            )
+            .named(
+                "reference",
+                SyntaxShape::Filepath,
+                "Use the access and modification times of the reference file/directory instead of the current time",
+                Some('r'),
+            )
+            .named(
+                "timestamp",
+                SyntaxShape::DateTime,
+                "Use the given timestamp instead of the current time",
+                Some('t')
+            )
+            .named(
+                "date",
+                SyntaxShape::String,
+                "Use the given time instead of the current time. This can be a full timestamp or it can be relative to either the current time or reference file time (if given). For more information, see https://www.gnu.org/software/coreutils/manual/html_node/touch-invocation.html",
+                Some('d')
+            )
+            .switch(
+                "modified",
+                "Change only the modification time (if used with -a, access time is changed too)",
+                Some('m'),
+            )
+            .switch(
+                "access",
+                "Change only the access time (if used with -m, modification time is changed too)",
+                Some('a'),
+            )
+            .switch(
+                "no-create",
+                "Don't create the file if it doesn't exist",
+                Some('c'),
+            )
+            .switch(
+                "no-deref",
+                "Affect each symbolic link instead of any referenced file (only for systems that can change the timestamps of a symlink). Ignored if touching stdout",
+                Some('s'),
+            )
+            .category(Category::FileSystem)
+    }
+
+    fn description(&self) -> &str {
+        "Creates one or more files."
+    }
+
+    fn run(
+        &self,
+        engine_state: &EngineState,
+        stack: &mut Stack,
+        call: &Call,
+        _input: PipelineData,
+    ) -> Result<PipelineData, ShellError> {
+        let change_mtime: bool = call.has_flag(engine_state, stack, "modified")?;
+        let change_atime: bool = call.has_flag(engine_state, stack, "access")?;
+        let no_create: bool = call.has_flag(engine_state, stack, "no-create")?;
+        let no_deref: bool = call.has_flag(engine_state, stack, "no-dereference")?;
+        let file_globs: Vec<Spanned<NuGlob>> =
+            get_rest_for_glob_pattern(engine_state, stack, call, 0)?;
+        let cwd = engine_state.cwd(Some(stack))?;
+
+        if file_globs.is_empty() {
+            return Err(ShellError::MissingParameter {
+                param_name: "requires file paths".to_string(),
+                span: call.head,
+            });
+        }
+
+        let (reference_file, reference_span) = if let Some(reference) =
+            call.get_flag::<Spanned<PathBuf>>(engine_state, stack, "reference")?
+        {
+            (Some(reference.item), Some(reference.span))
+        } else {
+            (None, None)
+        };
+        let (date_str, date_span) =
+            if let Some(date) = call.get_flag::<Spanned<String>>(engine_state, stack, "date")? {
+                (Some(date.item), Some(date.span))
+            } else {
+                (None, None)
+            };
+        let timestamp: Option<Spanned<DateTime<FixedOffset>>> =
+            call.get_flag(engine_state, stack, "timestamp")?;
+
+        let source = if let Some(timestamp) = timestamp {
+            if let Some(reference_span) = reference_span {
+                return Err(ShellError::IncompatibleParameters {
+                    left_message: "timestamp given".to_string(),
+                    left_span: timestamp.span,
+                    right_message: "reference given".to_string(),
+                    right_span: reference_span,
+                });
+            }
+            if let Some(date_span) = date_span {
+                return Err(ShellError::IncompatibleParameters {
+                    left_message: "timestamp given".to_string(),
+                    left_span: timestamp.span,
+                    right_message: "date given".to_string(),
+                    right_span: date_span,
+                });
+            }
+            Source::Timestamp(FileTime::from_unix_time(
+                timestamp.item.timestamp(),
+                timestamp.item.timestamp_subsec_nanos(),
+            ))
+        } else if let Some(reference_file) = reference_file {
+            let reference_file = expand_path_with(reference_file, &cwd, true);
+            Source::Reference(reference_file)
+        } else {
+            Source::Now
+        };
+
+        let change_times = if change_atime && !change_mtime {
+            ChangeTimes::AtimeOnly
+        } else if change_mtime && !change_atime {
+            ChangeTimes::MtimeOnly
+        } else {
+            ChangeTimes::Both
+        };
+
+        let mut input_files = Vec::new();
+        for file_glob in &file_globs {
+            if file_glob.item.as_ref() == "-" {
+                input_files.push(InputFile::Stdout);
+            } else {
+                let path =
+                    expand_path_with(file_glob.item.as_ref(), &cwd, file_glob.item.is_expand());
+                input_files.push(InputFile::Path(path));
+            }
+        }
+
+        if let Err(err) = uu_touch::touch(
+            &input_files,
+            &Options {
+                no_create,
+                no_deref,
+                source,
+                date: date_str,
+                change_times,
+                strict: true,
+            },
+        ) {
+            let nu_err = match err {
+                TouchError::TouchFileError { path, index, error } => ShellError::GenericError {
+                    error: format!("Could not touch {}", path.display()),
+                    msg: error.to_string(),
+                    span: Some(file_globs[index].span),
+                    help: None,
+                    inner: Vec::new(),
+                },
+                TouchError::InvalidDateFormat(date) => ShellError::IncorrectValue {
+                    msg: format!("Invalid date: {}", date),
+                    val_span: date_span.expect("utouch should've been given a date"),
+                    call_span: call.head,
+                },
+                TouchError::ReferenceFileInaccessible(reference_path, io_err) => {
+                    let span =
+                        reference_span.expect("utouch should've been given a reference file");
+                    if io_err.kind() == ErrorKind::NotFound {
+                        ShellError::FileNotFound {
+                            span,
+                            file: reference_path.display().to_string(),
+                        }
+                    } else {
+                        ShellError::GenericError {
+                            error: io_err.to_string(),
+                            msg: format!("Failed to read metadata of {}", reference_path.display()),
+                            span: Some(span),
+                            help: None,
+                            inner: Vec::new(),
+                        }
+                    }
+                }
+                _ => ShellError::GenericError {
+                    error: err.to_string(),
+                    msg: err.to_string(),
+                    span: Some(call.head),
+                    help: None,
+                    inner: Vec::new(),
+                },
+            };
+            return Err(nu_err);
+        }
+
+        Ok(PipelineData::empty())
+    }
+
+    fn examples(&self) -> Vec<Example> {
+        vec![
+            Example {
+                description: "Creates \"fixture.json\"",
+                example: "utouch fixture.json",
+                result: None,
+            },
+            Example {
+                description: "Creates files a, b and c",
+                example: "utouch a b c",
+                result: None,
+            },
+            Example {
+                description: r#"Changes the last modified time of "fixture.json" to today's date"#,
+                example: "utouch -m fixture.json",
+                result: None,
+            },
+            Example {
+                description: "Changes the last accessed and modified times of files a, b and c to the current time but yesterday",
+                example: r#"utouch -d "yesterday" a b c"#,
+                result: None,
+            },
+            Example {
+                description: r#"Changes the last modified time of files d and e to "fixture.json"'s last modified time"#,
+                example: r#"utouch -m -r fixture.json d e"#,
+                result: None,
+            },
+            Example {
+                description: r#"Changes the last accessed time of "fixture.json" to a datetime"#,
+                example: r#"utouch -a -t 2019-08-24T12:30:30 fixture.json"#,
+                result: None,
+            },
+            Example {
+                description: r#"Change the last accessed and modified times of stdout"#,
+                example: r#"utouch -"#,
+                result: None,
+            },
+            Example {
+                description: r#"Changes the last accessed and modified times of file a to 1 month before "fixture.json"'s last modified time"#,
+                example: r#"utouch -r fixture.json -d "-1 month" a"#,
+                result: None,
+            },
+        ]
+    }
+}

crates/nu-command/src/filesystem/watch.rs

@@ -194,7 +194,7 @@ impl Command for Watch {
 
                 match result {
                     Ok(val) => {
-                        val.print(engine_state, stack, false, false)?;
+                        val.print_table(engine_state, stack, false, false)?;
                     }
                     Err(err) => {
                         let working_set = StateWorkingSet::new(engine_state);

crates/nu-command/src/filters/insert.rs

@@ -129,6 +129,8 @@ fn insert(
     let replacement: Value = call.req(engine_state, stack, 1)?;
 
     match input {
+        // Propagate errors in the pipeline
+        PipelineData::Value(Value::Error { error, .. }, ..) => Err(*error),
         PipelineData::Value(mut value, metadata) => {
             if let Value::Closure { val, .. } = replacement {
                 match (cell_path.members.first(), &mut value) {

crates/nu-command/src/filters/merge.rs

@@ -120,6 +120,8 @@ repeating this process with row 1, and so on."#
                 PipelineData::Value(Value::Record { val: inp, .. }, ..),
                 Value::Record { val: to_merge, .. },
             ) => Ok(Value::record(do_merge(inp, &to_merge), head).into_pipeline_data()),
+            // Propagate errors in the pipeline
+            (PipelineData::Value(Value::Error { error, .. }, ..), _) => Err(*error.clone()),
             (PipelineData::Value(val, ..), ..) => {
                 // Only point the "value originates here" arrow at the merge value
                 // if it was generated from a block. Otherwise, point at the pipeline value. -Leon 2022-10-27

crates/nu-command/src/filters/split_by.rs

@@ -1,5 +1,6 @@
 use indexmap::IndexMap;
 use nu_engine::command_prelude::*;
+use nu_protocol::report_shell_warning;
 
 #[derive(Clone)]
 pub struct SplitBy;
@@ -27,6 +28,15 @@ impl Command for SplitBy {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
+        report_shell_warning(
+            engine_state,
+            &ShellError::Deprecated {
+                deprecated: "The `split_by` command",
+                suggestion: "Please use the `group-by` command instead.",
+                span: call.head,
+                help: None,
+            },
+        );
         split_by(engine_state, stack, call, input)
     }
 

crates/nu-command/src/formats/from/csv.rs

@@ -11,7 +11,10 @@ impl Command for FromCsv {
 
     fn signature(&self) -> Signature {
         Signature::build("from csv")
-            .input_output_types(vec![(Type::String, Type::table())])
+            .input_output_types(vec![
+                (Type::String, Type::table()),
+                (Type::String, Type::list(Type::Any)),
+            ])
             .named(
                 "separator",
                 SyntaxShape::String,
@@ -82,6 +85,26 @@ impl Command for FromCsv {
                     })],
                 ))
             },
+            Example {
+                description: "Convert comma-separated data to a table, allowing variable number of columns per row",
+                example: "\"ColA,ColB\n1,2\n3,4,5\n6\" | from csv --flexible",
+                result: Some(Value::test_list (
+                    vec![
+                        Value::test_record(record! {
+                            "ColA" => Value::test_int(1),
+                            "ColB" => Value::test_int(2),
+                        }),
+                        Value::test_record(record! {
+                            "ColA" => Value::test_int(3),
+                            "ColB" => Value::test_int(4),
+                            "column2" => Value::test_int(5),
+                        }),
+                        Value::test_record(record! {
+                            "ColA" => Value::test_int(6),
+                        }),
+                    ],
+                ))
+            },
             Example {
                 description: "Convert comma-separated data to a table, ignoring headers",
                 example: "open data.txt | from csv --noheaders",

crates/nu-command/src/formats/from/delimited.rs

@@ -39,12 +39,7 @@ fn from_delimited_stream(
         .from_reader(input_reader);
 
     let headers = if noheaders {
-        (0..reader
+        vec![]
-            .headers()
-            .map_err(|err| from_csv_error(err, span))?
-            .len())
-            .map(|i| format!("column{i}"))
-            .collect::<Vec<String>>()
     } else {
         reader
             .headers()
@@ -54,15 +49,17 @@ fn from_delimited_stream(
             .collect()
     };
 
+    let n = headers.len();
+    let columns = headers
+        .into_iter()
+        .chain((n..).map(|i| format!("column{i}")));
     let iter = reader.into_records().map(move |row| {
         let row = match row {
             Ok(row) => row,
             Err(err) => return Value::error(from_csv_error(err, span), span),
         };
-        let columns = headers.iter().cloned();
+        let columns = columns.clone();
-        let values = row
+        let values = row.into_iter().map(|s| {
-            .into_iter()
-            .map(|s| {
             if no_infer {
                 Value::string(s, span)
             } else if let Ok(i) = s.parse() {
@@ -72,14 +69,8 @@ fn from_delimited_stream(
             } else {
                 Value::string(s, span)
             }
-            })
+        });
-            .chain(std::iter::repeat(Value::nothing(span)));
 
-        // If there are more values than the number of headers,
-        // then the remaining values are ignored.
-        //
-        // Otherwise, if there are less values than headers,
-        // then `Value::nothing(span)` is used to fill the remaining columns.
         Value::record(columns.zip(values).collect(), span)
     });
 

crates/nu-command/src/formats/from/tsv.rs

@@ -11,7 +11,10 @@ impl Command for FromTsv {
 
     fn signature(&self) -> Signature {
         Signature::build("from tsv")
-            .input_output_types(vec![(Type::String, Type::table())])
+            .input_output_types(vec![
+                (Type::String, Type::table()),
+                (Type::String, Type::list(Type::Any)),
+            ])
             .named(
                 "comment",
                 SyntaxShape::String,
@@ -76,6 +79,21 @@ impl Command for FromTsv {
                     })],
                 ))
             },
+            Example {
+                description: "Convert comma-separated data to a table, allowing variable number of columns per row and ignoring headers",
+                example: "\"value 1\nvalue 2\tdescription 2\" | from tsv --flexible --noheaders",
+                result: Some(Value::test_list (
+                    vec![
+                        Value::test_record(record! {
+                            "column0" => Value::test_string("value 1"),
+                        }),
+                        Value::test_record(record! {
+                            "column0" => Value::test_string("value 2"),
+                            "column1" => Value::test_string("description 2"),
+                        }),
+                    ],
+                ))
+            },
             Example {
                 description: "Create a tsv file with header columns and open it",
                 example: r#"$'c1(char tab)c2(char tab)c3(char nl)1(char tab)2(char tab)3' | save tsv-data | open tsv-data | from tsv"#,

crates/nu-command/src/formats/to/xml.rs

@@ -4,7 +4,7 @@ use nu_engine::command_prelude::*;
 
 use quick_xml::{
     escape,
-    events::{BytesEnd, BytesStart, BytesText, Event},
+    events::{BytesEnd, BytesPI, BytesStart, BytesText, Event},
 };
 use std::{borrow::Cow, io::Cursor};
 
@@ -406,7 +406,7 @@ impl Job {
         let content_text = format!("{} {}", tag, content);
         // PI content must NOT be escaped
         // https://www.w3.org/TR/xml/#sec-pi
-        let pi_content = BytesText::from_escaped(content_text.as_str());
+        let pi_content = BytesPI::new(content_text.as_str());
 
         self.writer
             .write_event(Event::PI(pi_content))

crates/nu-command/src/help/help_operators.rs

@@ -31,7 +31,7 @@ impl Command for HelpOperators {
         let mut operators = [
             Operator::Assignment(Assignment::Assign),
             Operator::Assignment(Assignment::PlusAssign),
-            Operator::Assignment(Assignment::AppendAssign),
+            Operator::Assignment(Assignment::ConcatAssign),
             Operator::Assignment(Assignment::MinusAssign),
             Operator::Assignment(Assignment::MultiplyAssign),
             Operator::Assignment(Assignment::DivideAssign),
@@ -48,7 +48,7 @@ impl Command for HelpOperators {
             Operator::Comparison(Comparison::StartsWith),
             Operator::Comparison(Comparison::EndsWith),
             Operator::Math(Math::Plus),
-            Operator::Math(Math::Append),
+            Operator::Math(Math::Concat),
             Operator::Math(Math::Minus),
             Operator::Math(Math::Multiply),
             Operator::Math(Math::Divide),
@@ -144,8 +144,8 @@ fn description(operator: &Operator) -> &'static str {
         Operator::Comparison(Comparison::StartsWith) => "Checks if a string starts with another.",
         Operator::Comparison(Comparison::EndsWith) => "Checks if a string ends with another.",
         Operator::Math(Math::Plus) => "Adds two values.",
-        Operator::Math(Math::Append) => {
+        Operator::Math(Math::Concat) => {
-            "Appends two lists, a list and a value, two strings, or two binary values."
+            "Concatenates two lists, two strings, or two binary values."
         }
         Operator::Math(Math::Minus) => "Subtracts two values.",
         Operator::Math(Math::Multiply) => "Multiplies two values.",
@@ -163,8 +163,8 @@ fn description(operator: &Operator) -> &'static str {
         Operator::Bits(Bits::ShiftRight) => "Bitwise shifts a value right by another.",
         Operator::Assignment(Assignment::Assign) => "Assigns a value to a variable.",
         Operator::Assignment(Assignment::PlusAssign) => "Adds a value to a variable.",
-        Operator::Assignment(Assignment::AppendAssign) => {
+        Operator::Assignment(Assignment::ConcatAssign) => {
-            "Appends a list, a value, a string, or a binary value to a variable."
+            "Concatenates two lists, two strings, or two binary values."
         }
         Operator::Assignment(Assignment::MinusAssign) => "Subtracts a value from a variable.",
         Operator::Assignment(Assignment::MultiplyAssign) => "Multiplies a variable by a value.",

crates/nu-command/src/network/http/client.rs

@@ -376,7 +376,7 @@ fn send_multipart_request(
                         format!("Content-Length: {}", val.len()),
                     ];
                     builder
-                        .add(&mut Cursor::new(val), &headers.join("\n"))
+                        .add(&mut Cursor::new(val), &headers.join("\r\n"))
                         .map_err(err)?;
                 } else {
                     let headers = format!(r#"Content-Disposition: form-data; name="{}""#, col);

crates/nu-command/src/platform/input/input_.rs

@@ -43,6 +43,12 @@ impl Command for Input {
                 "number of characters to read; suppresses output",
                 Some('n'),
             )
+            .named(
+                "default",
+                SyntaxShape::String,
+                "default value if no input is provided",
+                Some('d'),
+            )
             .switch("suppress-output", "don't print keystroke values", Some('s'))
             .category(Category::Platform)
     }
@@ -72,8 +78,12 @@ impl Command for Input {
             });
         }
 
+        let default_val: Option<String> = call.get_flag(engine_state, stack, "default")?;
         if let Some(prompt) = &prompt {
-            print!("{prompt}");
+            match &default_val {
+                None => print!("{prompt}"),
+                Some(val) => print!("{prompt} (default: {val})"),
+            }
             let _ = std::io::stdout().flush();
         }
 
@@ -149,7 +159,10 @@ impl Command for Input {
         if !suppress_output {
             std::io::stdout().write_all(b"\n")?;
         }
-        Ok(Value::string(buf, call.head).into_pipeline_data())
+        match default_val {
+            Some(val) if buf.is_empty() => Ok(Value::string(val, call.head).into_pipeline_data()),
+            _ => Ok(Value::string(buf, call.head).into_pipeline_data()),
+        }
     }
 
     fn examples(&self) -> Vec<Example> {
@@ -164,6 +177,11 @@ impl Command for Input {
                 example: "let user_input = (input --numchar 2)",
                 result: None,
             },
+            Example {
+                description: "Get input from the user with default value, and assign to a variable",
+                example: "let user_input = (input --default 10)",
+                result: None,
+            },
         ]
     }
 }

crates/nu-command/src/platform/mod.rs

@@ -5,7 +5,7 @@ mod input;
 mod is_terminal;
 mod kill;
 mod sleep;
-mod term_size;
+mod term;
 #[cfg(unix)]
 mod ulimit;
 mod whoami;
@@ -19,7 +19,7 @@ pub use input::InputListen;
 pub use is_terminal::IsTerminal;
 pub use kill::Kill;
 pub use sleep::Sleep;
-pub use term_size::TermSize;
+pub use term::{Term, TermQuery, TermSize};
 #[cfg(unix)]
 pub use ulimit::ULimit;
 pub use whoami::Whoami;

crates/nu-command/src/platform/term/mod.rs

@@ -0,0 +1,7 @@
+mod term_;
+mod term_query;
+mod term_size;
+
+pub use term_::Term;
+pub use term_query::TermQuery;
+pub use term_size::TermSize;

crates/nu-command/src/platform/term/term_.rs

@@ -0,0 +1,34 @@
+use nu_engine::{command_prelude::*, get_full_help};
+
+#[derive(Clone)]
+pub struct Term;
+
+impl Command for Term {
+    fn name(&self) -> &str {
+        "term"
+    }
+
+    fn signature(&self) -> Signature {
+        Signature::build("term")
+            .category(Category::Platform)
+            .input_output_types(vec![(Type::Nothing, Type::String)])
+    }
+
+    fn description(&self) -> &str {
+        "Commands for querying information about the terminal."
+    }
+
+    fn extra_description(&self) -> &str {
+        "You must use one of the following subcommands. Using this command as-is will only produce this help message."
+    }
+
+    fn run(
+        &self,
+        engine_state: &EngineState,
+        stack: &mut Stack,
+        call: &Call,
+        _input: PipelineData,
+    ) -> Result<PipelineData, ShellError> {
+        Ok(Value::string(get_full_help(self, engine_state, stack), call.head).into_pipeline_data())
+    }
+}

crates/nu-command/src/platform/term/term_query.rs

@@ -0,0 +1,137 @@
+use std::{
+    io::{Read, Write},
+    time::Duration,
+};
+
+use nu_engine::command_prelude::*;
+
+const CTRL_C: u8 = 3;
+
+#[derive(Clone)]
+pub struct TermQuery;
+
+impl Command for TermQuery {
+    fn name(&self) -> &str {
+        "term query"
+    }
+
+    fn description(&self) -> &str {
+        "Query the terminal for information."
+    }
+
+    fn extra_description(&self) -> &str {
+        "Print the given query, and read the immediate result from stdin.
+
+The standard input will be read right after `query` is printed, and consumed until the `terminator`
+sequence is encountered. The `terminator` is not removed from the output.
+
+If `terminator` is not supplied, input will be read until Ctrl-C is pressed."
+    }
+
+    fn signature(&self) -> Signature {
+        Signature::build("term query")
+            .category(Category::Platform)
+            .input_output_types(vec![(Type::Nothing, Type::Binary)])
+            .allow_variants_without_examples(true)
+            .required(
+                "query",
+                SyntaxShape::OneOf(vec![SyntaxShape::Binary, SyntaxShape::String]),
+                "The query that will be printed to stdout.",
+            )
+            .named(
+                "terminator",
+                SyntaxShape::OneOf(vec![SyntaxShape::Binary, SyntaxShape::String]),
+                "Terminator sequence for the expected reply.",
+                Some('t'),
+            )
+    }
+
+    fn examples(&self) -> Vec<Example> {
+        vec![
+            Example {
+                description: "Get cursor position.",
+                example: r#"term query (ansi cursor_position) --terminator 'R'"#,
+                result: None,
+            },
+            Example {
+                description: "Get terminal background color.",
+                example: r#"term query $'(ansi osc)10;?(ansi st)' --terminator (ansi st)"#,
+                result: None,
+            },
+            Example {
+                description: "Read clipboard content on terminals supporting OSC-52.",
+                example: r#"term query $'(ansi osc)52;c;?(ansi st)' --terminator (ansi st)"#,
+                result: None,
+            },
+        ]
+    }
+
+    fn run(
+        &self,
+        engine_state: &EngineState,
+        stack: &mut Stack,
+        call: &Call,
+        _input: PipelineData,
+    ) -> Result<PipelineData, ShellError> {
+        let query: Vec<u8> = call.req(engine_state, stack, 0)?;
+        let terminator: Option<Vec<u8>> = call.get_flag(engine_state, stack, "terminator")?;
+
+        crossterm::terminal::enable_raw_mode()?;
+
+        // clear terminal events
+        while crossterm::event::poll(Duration::from_secs(0))? {
+            // If there's an event, read it to remove it from the queue
+            let _ = crossterm::event::read()?;
+        }
+
+        let mut b = [0u8; 1];
+        let mut buf = vec![];
+        let mut stdin = std::io::stdin().lock();
+
+        {
+            let mut stdout = std::io::stdout().lock();
+            stdout.write_all(&query)?;
+            stdout.flush()?;
+        }
+
+        let out = if let Some(terminator) = terminator {
+            loop {
+                if let Err(err) = stdin.read_exact(&mut b) {
+                    break Err(ShellError::from(err));
+                }
+
+                if b[0] == CTRL_C {
+                    break Err(ShellError::Interrupted { span: call.head });
+                }
+
+                buf.push(b[0]);
+
+                if buf.ends_with(&terminator) {
+                    break Ok(Value::Binary {
+                        val: buf,
+                        internal_span: call.head,
+                    }
+                    .into_pipeline_data());
+                }
+            }
+        } else {
+            loop {
+                if let Err(err) = stdin.read_exact(&mut b) {
+                    break Err(ShellError::from(err));
+                }
+
+                if b[0] == CTRL_C {
+                    break Ok(Value::Binary {
+                        val: buf,
+                        internal_span: call.head,
+                    }
+                    .into_pipeline_data());
+                }
+
+                buf.push(b[0]);
+            }
+        };
+        crossterm::terminal::disable_raw_mode()?;
+        out
+    }
+}

crates/nu-command/src/platform/term/term_size.rs

@@ -1,5 +1,5 @@
+use crossterm::terminal::size;
 use nu_engine::command_prelude::*;
-use terminal_size::{terminal_size, Height, Width};
 
 #[derive(Clone)]
 pub struct TermSize;
@@ -51,15 +51,12 @@ impl Command for TermSize {
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
 
-        let (cols, rows) = match terminal_size() {
+        let (cols, rows) = size().unwrap_or((0, 0));
-            Some((w, h)) => (Width(w.0), Height(h.0)),
-            None => (Width(0), Height(0)),
-        };
 
         Ok(Value::record(
             record! {
-                "columns" => Value::int(cols.0 as i64, head),
+                "columns" => Value::int(cols as i64, head),
-                "rows" => Value::int(rows.0 as i64, head),
+                "rows" => Value::int(rows as i64, head),
             },
             head,
         )

crates/nu-command/src/random/dice.rs

@@ -12,7 +12,7 @@ impl Command for SubCommand {
 
     fn signature(&self) -> Signature {
         Signature::build("random dice")
-            .input_output_types(vec![(Type::Nothing, Type::ListStream)])
+            .input_output_types(vec![(Type::Nothing, Type::list(Type::Int))])
             .allow_variants_without_examples(true)
             .named(
                 "dice",

crates/nu-command/src/strings/str_/contains.rs

@@ -77,20 +77,6 @@ impl Command for SubCommand {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        if call.has_flag_const(working_set, "not")? {
-            nu_protocol::report_shell_error(
-                working_set.permanent(),
-                &ShellError::GenericError {
-                    error: "Deprecated option".into(),
-                    msg: "`str contains --not {string}` is deprecated and will be removed in 0.95."
-                        .into(),
-                    span: Some(call.head),
-                    help: Some("Please use the `not` operator instead.".into()),
-                    inner: vec![],
-                },
-            );
-        }
-
         let cell_paths: Vec<CellPath> = call.rest_const(working_set, 1)?;
         let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
         let args = Arguments {

crates/nu-command/src/strings/str_/stats.rs

@@ -307,7 +307,7 @@ fn test_one_newline() {
     correct_counts.insert(Counter::GraphemeClusters, 1);
     correct_counts.insert(Counter::Bytes, 1);
     correct_counts.insert(Counter::CodePoints, 1);
-    correct_counts.insert(Counter::UnicodeWidth, 0);
+    correct_counts.insert(Counter::UnicodeWidth, 1);
 
     assert_eq!(correct_counts, counts);
 }
@@ -347,7 +347,7 @@ fn test_count_counts_lines() {
 
     // one more than grapheme clusters because of \r\n
     correct_counts.insert(Counter::CodePoints, 24);
-    correct_counts.insert(Counter::UnicodeWidth, 17);
+    correct_counts.insert(Counter::UnicodeWidth, 23);
 
     assert_eq!(correct_counts, counts);
 }

crates/nu-command/src/system/nu_check.rs

@@ -15,7 +15,6 @@ impl Command for NuCheck {
         Signature::build("nu-check")
             .input_output_types(vec![
                 (Type::String, Type::Bool),
-                (Type::ListStream, Type::Bool),
                 (Type::List(Box::new(Type::Any)), Type::Bool),
             ])
             // type is string to avoid automatically canonicalizing the path

crates/nu-command/src/system/run_external.rs

@@ -5,6 +5,8 @@ use nu_protocol::{did_you_mean, process::ChildProcess, ByteStream, NuGlob, OutDe
 use nu_system::ForegroundChild;
 use nu_utils::IgnoreCaseExt;
 use pathdiff::diff_paths;
+#[cfg(windows)]
+use std::os::windows::process::CommandExt;
 use std::{
     borrow::Cow,
     ffi::{OsStr, OsString},
@@ -91,6 +93,22 @@ impl Command for External {
             false
         };
 
+        // let's make sure it's a .ps1 script, but only on Windows
+        let potential_powershell_script = if cfg!(windows) {
+            if let Some(executable) = which(&expanded_name, "", cwd.as_ref()) {
+                let ext = executable
+                    .extension()
+                    .unwrap_or_default()
+                    .to_string_lossy()
+                    .to_uppercase();
+                ext == "PS1"
+            } else {
+                false
+            }
+        } else {
+            false
+        };
+
         // Find the absolute path to the executable. On Windows, set the
         // executable to "cmd.exe" if it's a CMD internal command. If the
         // command is not found, display a helpful error message.
@@ -98,11 +116,16 @@ impl Command for External {
             && (is_cmd_internal_command(&name_str) || potential_nuscript_in_windows)
         {
             PathBuf::from("cmd.exe")
+        } else if cfg!(windows) && potential_powershell_script {
+            // If we're on Windows and we're trying to run a PowerShell script, we'll use
+            // `powershell.exe` to run it. We shouldn't have to check for powershell.exe because
+            // it's automatically installed on all modern windows systems.
+            PathBuf::from("powershell.exe")
         } else {
             // Determine the PATH to be used and then use `which` to find it - though this has no
             // effect if it's an absolute path already
             let paths = nu_engine::env::path_str(engine_state, stack, call.head)?;
-            let Some(executable) = which(expanded_name, &paths, cwd.as_ref()) else {
+            let Some(executable) = which(&expanded_name, &paths, cwd.as_ref()) else {
                 return Err(command_not_found(&name_str, call.head, engine_state, stack));
             };
             executable
@@ -123,15 +146,29 @@ impl Command for External {
         let args = eval_arguments_from_call(engine_state, stack, call)?;
         #[cfg(windows)]
         if is_cmd_internal_command(&name_str) || potential_nuscript_in_windows {
-            use std::os::windows::process::CommandExt;
-
             // The /D flag disables execution of AutoRun commands from registry.
             // The /C flag followed by a command name instructs CMD to execute
             // that command and quit.
-            command.args(["/D", "/C", &name_str]);
+            command.args(["/D", "/C", &expanded_name.to_string_lossy()]);
             for arg in &args {
                 command.raw_arg(escape_cmd_argument(arg)?);
             }
+        } else if potential_powershell_script {
+            use nu_path::canonicalize_with;
+
+            // canonicalize the path to the script so that tests pass
+            let canon_path = if let Ok(cwd) = engine_state.cwd_as_string(None) {
+                canonicalize_with(&expanded_name, cwd)?
+            } else {
+                // If we can't get the current working directory, just provide the expanded name
+                expanded_name
+            };
+            // The -Command flag followed by a script name instructs PowerShell to
+            // execute that script and quit.
+            command.args(["-Command", &canon_path.to_string_lossy()]);
+            for arg in &args {
+                command.raw_arg(arg.item.clone());
+            }
         } else {
             command.args(args.into_iter().map(|s| s.item));
         }

crates/nu-command/src/system/sys/net.rs

@@ -44,8 +44,29 @@ fn net(span: Span) -> Value {
     let networks = Networks::new_with_refreshed_list()
         .iter()
         .map(|(iface, data)| {
+            let ip_addresses = data
+                .ip_networks()
+                .iter()
+                .map(|ip| {
+                    let protocol = match ip.addr {
+                        std::net::IpAddr::V4(_) => "ipv4",
+                        std::net::IpAddr::V6(_) => "ipv6",
+                    };
+                    Value::record(
+                        record! {
+                            "address" => Value::string(ip.addr.to_string(), span),
+                            "protocol" => Value::string(protocol, span),
+                            "loop" => Value::bool(ip.addr.is_loopback(), span),
+                            "multicast" => Value::bool(ip.addr.is_multicast(), span),
+                        },
+                        span,
+                    )
+                })
+                .collect();
             let record = record! {
                 "name" => Value::string(trim_cstyle_null(iface), span),
+                "mac" => Value::string(data.mac_address().to_string(), span),
+                "ip" => Value::list(ip_addresses, span),
                 "sent" => Value::filesize(data.total_transmitted() as i64, span),
                 "recv" => Value::filesize(data.total_received() as i64, span),
             };

crates/nu-command/src/viewers/griddle.rs

@@ -1,12 +1,12 @@
 // use super::icons::{icon_for_file, iconify_style_ansi_to_nu};
 use super::icons::icon_for_file;
+use crossterm::terminal::size;
 use lscolors::Style;
 use nu_engine::{command_prelude::*, env_to_string};
 use nu_protocol::Config;
 use nu_term_grid::grid::{Alignment, Cell, Direction, Filling, Grid, GridOptions};
 use nu_utils::get_ls_colors;
 use std::path::Path;
-use terminal_size::{Height, Width};
 
 #[derive(Clone)]
 pub struct Griddle;
@@ -192,7 +192,7 @@ fn create_grid_output(
 
     let cols = if let Some(col) = width_param {
         col as u16
-    } else if let Some((Width(w), Height(_h))) = terminal_size::terminal_size() {
+    } else if let Ok((w, _h)) = size() {
         w
     } else {
         80u16

crates/nu-command/src/viewers/table.rs

@@ -2,6 +2,7 @@
 //        overall reduce the redundant calls to StyleComputer etc.
 //        the goal is to configure it once...
 
+use crossterm::terminal::size;
 use lscolors::{LsColors, Style};
 use nu_color_config::{color_from_hex, StyleComputer, TextStyle};
 use nu_engine::{command_prelude::*, env_to_string};
@@ -22,7 +23,6 @@ use std::{
     str::FromStr,
     time::Instant,
 };
-use terminal_size::{Height, Width};
 use url::Url;
 
 const STREAM_PAGE_SIZE: usize = 1000;
@@ -30,7 +30,7 @@ const STREAM_PAGE_SIZE: usize = 1000;
 fn get_width_param(width_param: Option<i64>) -> usize {
     if let Some(col) = width_param {
         col as usize
-    } else if let Some((Width(w), Height(_))) = terminal_size::terminal_size() {
+    } else if let Ok((w, _h)) = size() {
         w as usize
     } else {
         80
@@ -1088,7 +1088,7 @@ fn create_empty_placeholder(
     let data = vec![vec![cell]];
     let mut table = NuTable::from(data);
     table.set_data_style(TextStyle::default().dimmed());
-    let out = TableOutput::new(table, false, false, false);
+    let out = TableOutput::new(table, false, false, 1);
 
     let style_computer = &StyleComputer::from_config(engine_state, stack);
     let config = create_nu_table_config(&config, style_computer, &out, false, TableMode::default());

crates/nu-command/tests/commands/assignment/append_assign.rs

@@ -1,88 +0,0 @@
-use nu_test_support::nu;
-
-#[test]
-fn append_assign_int() {
-    let actual = nu!(r#"
-            mut a = [1 2];
-            $a ++= [3 4];
-            $a == [1 2 3 4]
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_string() {
-    let actual = nu!(r#"
-            mut a = [a b];
-            $a ++= [c d];
-            $a == [a b c d]
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_any() {
-    let actual = nu!(r#"
-            mut a = [1 2 a];
-            $a ++= [b 3];
-            $a == [1 2 a b 3]
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_both_empty() {
-    let actual = nu!(r#"
-            mut a = [];
-            $a ++= [];
-            $a == []
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_type_mismatch() {
-    let actual = nu!(r#"
-            mut a = [1 2];
-            $a ++= [a];
-            $a == [1 2 "a"]
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_single_element() {
-    let actual = nu!(r#"
-            mut a = ["list" "and"];
-            $a ++= "a single element";
-	    $a == ["list" "and" "a single element"]
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_to_single_element() {
-    let actual = nu!(r#"
-            mut a = "string";
-            $a ++= ["and" "the" "list"];
-	    $a == ["string" "and" "the" "list"]
-        "#);
-
-    assert_eq!(actual.out, "true")
-}
-
-#[test]
-fn append_assign_single_to_single() {
-    let actual = nu!(r#"
-            mut a = 1;
-            $a ++= "and a single element";
-        "#);
-
-    assert!(actual.err.contains("nu::parser::unsupported_operation"));
-}

crates/nu-command/tests/commands/assignment/concat.rs

@@ -0,0 +1,76 @@
+use nu_test_support::nu;
+
+#[test]
+fn concat_assign_list_int() {
+    let actual = nu!(r#"
+        mut a = [1 2];
+        $a ++= [3 4];
+        $a == [1 2 3 4]
+    "#);
+
+    assert_eq!(actual.out, "true")
+}
+
+#[test]
+fn concat_assign_list_string() {
+    let actual = nu!(r#"
+        mut a = [a b];
+        $a ++= [c d];
+        $a == [a b c d]
+    "#);
+
+    assert_eq!(actual.out, "true")
+}
+
+#[test]
+fn concat_assign_any() {
+    let actual = nu!(r#"
+        mut a = [1 2 a];
+        $a ++= [b 3];
+        $a == [1 2 a b 3]
+    "#);
+
+    assert_eq!(actual.out, "true")
+}
+
+#[test]
+fn concat_assign_both_empty() {
+    let actual = nu!(r#"
+        mut a = [];
+        $a ++= [];
+        $a == []
+    "#);
+
+    assert_eq!(actual.out, "true")
+}
+
+#[test]
+fn concat_assign_string() {
+    let actual = nu!(r#"
+        mut a = 'hello';
+        $a ++= ' world';
+        $a == 'hello world'
+    "#);
+
+    assert_eq!(actual.out, "true")
+}
+
+#[test]
+fn concat_assign_type_mismatch() {
+    let actual = nu!(r#"
+        mut a = [];
+        $a ++= 'str'
+    "#);
+
+    assert!(actual.err.contains("nu::parser::unsupported_operation"));
+}
+
+#[test]
+fn concat_assign_runtime_type_mismatch() {
+    let actual = nu!(r#"
+        mut a = [];
+        $a ++= if true { 'str' }
+    "#);
+
+    assert!(actual.err.contains("nu::shell::type_mismatch"));
+}

crates/nu-command/tests/commands/assignment/mod.rs

@@ -1 +1 @@
-mod append_assign;
+mod concat;

crates/nu-command/tests/commands/def.rs

@@ -2,6 +2,13 @@ use nu_test_support::nu;
 use nu_test_support::playground::Playground;
 use std::fs;
 
+#[test]
+fn def_with_trailing_comma() {
+    let actual = nu!("def test-command [ foo: int, ] { $foo }; test-command 1");
+
+    assert!(actual.out == "1");
+}
+
 #[test]
 fn def_with_comment() {
     Playground::setup("def_with_comment", |dirs, _| {
@@ -72,6 +79,13 @@ fn def_errors_with_comma_before_equals() {
     assert!(actual.err.contains("expected parameter"));
 }
 
+#[test]
+fn def_errors_with_colon_before_equals() {
+    let actual = nu!("def test-command [ foo: = 1 ] {}");
+
+    assert!(actual.err.contains("expected type"));
+}
+
 #[test]
 fn def_errors_with_comma_before_colon() {
     let actual = nu!("def test-command [ foo, : int ] {}");
@@ -85,7 +99,6 @@ fn def_errors_with_multiple_colons() {
     assert!(actual.err.contains("expected type"));
 }
 
-#[ignore = "This error condition is not implemented yet"]
 #[test]
 fn def_errors_with_multiple_types() {
     let actual = nu!("def test-command [ foo:int:string ] {}");
@@ -93,6 +106,20 @@ fn def_errors_with_multiple_types() {
     assert!(actual.err.contains("expected parameter"));
 }
 
+#[test]
+fn def_errors_with_trailing_colon() {
+    let actual = nu!("def test-command [ foo: int: ] {}");
+
+    assert!(actual.err.contains("expected parameter"));
+}
+
+#[test]
+fn def_errors_with_trailing_default_value() {
+    let actual = nu!("def test-command [ foo: int = ] {}");
+
+    assert!(actual.err.contains("expected default value"));
+}
+
 #[test]
 fn def_errors_with_multiple_commas() {
     let actual = nu!("def test-command [ foo,,bar ] {}");

crates/nu-command/tests/commands/do_.rs

@@ -44,7 +44,7 @@ fn do_with_semicolon_break_on_failed_external() {
 fn ignore_shell_errors_works_for_external_with_semicolon() {
     let actual = nu!(r#"do -s { open asdfasdf.txt }; "text""#);
 
-    assert_eq!(actual.err, "");
+    assert!(actual.err.contains("Deprecated option"));
     assert_eq!(actual.out, "text");
 }
 
@@ -52,7 +52,7 @@ fn ignore_shell_errors_works_for_external_with_semicolon() {
 fn ignore_program_errors_works_for_external_with_semicolon() {
     let actual = nu!(r#"do -p { nu -n -c 'exit 1' }; "text""#);
 
-    assert_eq!(actual.err, "");
+    assert!(actual.err.contains("Deprecated option"));
     assert_eq!(actual.out, "text");
 }
 
@@ -80,6 +80,7 @@ fn run_closure_with_it_using() {
 #[test]
 fn waits_for_external() {
     let actual = nu!(r#"do -p { nu -c 'sleep 1sec; print before; exit 1'}; print after"#);
-    assert!(actual.err.is_empty());
+
+    assert!(actual.err.contains("Deprecated option"));
     assert_eq!(actual.out, "beforeafter");
 }

crates/nu-command/tests/commands/math/mod.rs

@@ -483,7 +483,7 @@ fn compound_where_paren() {
 // TODO: these ++ tests are not really testing *math* functionality, maybe find another place for them
 
 #[test]
-fn adding_lists() {
+fn concat_lists() {
     let actual = nu!(pipeline(
         r#"
             [1 3] ++ [5 6] | to nuon
@@ -494,29 +494,7 @@ fn adding_lists() {
 }
 
 #[test]
-fn adding_list_and_value() {
+fn concat_tables() {
-    let actual = nu!(pipeline(
-        r#"
-            [1 3] ++ 5 | to nuon
-        "#
-    ));
-
-    assert_eq!(actual.out, "[1, 3, 5]");
-}
-
-#[test]
-fn adding_value_and_list() {
-    let actual = nu!(pipeline(
-        r#"
-            1 ++ [3 5] | to nuon
-        "#
-    ));
-
-    assert_eq!(actual.out, "[1, 3, 5]");
-}
-
-#[test]
-fn adding_tables() {
     let actual = nu!(pipeline(
         r#"
             [[a b]; [1 2]] ++ [[c d]; [10 11]] | to nuon
@@ -526,7 +504,7 @@ fn adding_tables() {
 }
 
 #[test]
-fn append_strings() {
+fn concat_strings() {
     let actual = nu!(pipeline(
         r#"
             "foo" ++ "bar"
@@ -536,7 +514,7 @@ fn append_strings() {
 }
 
 #[test]
-fn append_binary_values() {
+fn concat_binary_values() {
     let actual = nu!(pipeline(
         r#"
             0x[01 02] ++ 0x[03 04] | to nuon

crates/nu-command/tests/commands/mod.rs

@@ -127,6 +127,7 @@ mod update;
 mod upsert;
 mod url;
 mod use_;
+mod utouch;
 mod where_;
 mod which;
 mod while_;

crates/nu-command/tests/commands/move_/umv.rs

@@ -513,13 +513,18 @@ fn test_mv_no_clobber() {
         sandbox.with_files(&[EmptyFile(file_a)]);
         sandbox.with_files(&[EmptyFile(file_b)]);
 
-        let actual = nu!(
+        let _ = nu!(
             cwd: dirs.test(),
             "mv -n {} {}",
             file_a,
             file_b,
         );
-        assert!(actual.err.contains("not replacing"));
+
+        let file_count = nu!(
+            cwd: dirs.test(),
+            "ls test_mv* | length | to nuon"
+        );
+        assert_eq!(file_count.out, "2");
     })
 }
 

crates/nu-command/tests/commands/run_external.rs

@@ -355,9 +355,9 @@ fn external_command_receives_raw_binary_data() {
 
 #[cfg(windows)]
 #[test]
-fn can_run_batch_files() {
+fn can_run_cmd_files() {
     use nu_test_support::fs::Stub::FileWithContent;
-    Playground::setup("run a Windows batch file", |dirs, sandbox| {
+    Playground::setup("run a Windows cmd file", |dirs, sandbox| {
         sandbox.with_files(&[FileWithContent(
             "foo.cmd",
             r#"
@@ -371,12 +371,30 @@ fn can_run_batch_files() {
     });
 }
 
+#[cfg(windows)]
+#[test]
+fn can_run_batch_files() {
+    use nu_test_support::fs::Stub::FileWithContent;
+    Playground::setup("run a Windows batch file", |dirs, sandbox| {
+        sandbox.with_files(&[FileWithContent(
+            "foo.bat",
+            r#"
+                @echo off
+                echo Hello World
+            "#,
+        )]);
+
+        let actual = nu!(cwd: dirs.test(), pipeline("foo.bat"));
+        assert!(actual.out.contains("Hello World"));
+    });
+}
+
 #[cfg(windows)]
 #[test]
 fn can_run_batch_files_without_cmd_extension() {
     use nu_test_support::fs::Stub::FileWithContent;
     Playground::setup(
-        "run a Windows batch file without specifying the extension",
+        "run a Windows cmd file without specifying the extension",
         |dirs, sandbox| {
             sandbox.with_files(&[FileWithContent(
                 "foo.cmd",
@@ -440,3 +458,20 @@ fn redirect_combine() {
         assert_eq!(actual.out, "FooBar");
     });
 }
+
+#[cfg(windows)]
+#[test]
+fn can_run_ps1_files() {
+    use nu_test_support::fs::Stub::FileWithContent;
+    Playground::setup("run_a_windows_ps_file", |dirs, sandbox| {
+        sandbox.with_files(&[FileWithContent(
+            "foo.ps1",
+            r#"
+                Write-Host Hello World
+            "#,
+        )]);
+
+        let actual = nu!(cwd: dirs.test(), pipeline("foo.ps1"));
+        assert!(actual.out.contains("Hello World"));
+    });
+}

crates/nu-command/tests/commands/table.rs

@@ -2941,3 +2941,123 @@ fn table_footer_inheritance() {
     assert_eq!(actual.out.match_indices("x2").count(), 1);
     assert_eq!(actual.out.match_indices("x3").count(), 1);
 }
+
+#[test]
+fn table_footer_inheritance_kv_rows() {
+    let actual = nu!(
+        concat!(
+            "$env.config.table.footer_inheritance = true;",
+            "$env.config.footer_mode = 7;",
+            "[[a b]; ['kv' {0: 0, 1: 1, 2: 2, 3: 3, 4: 4} ], ['data' 0], ['data' 0] ] | table --expand --width=80",
+        )
+    );
+
+    assert_eq!(
+        actual.out,
+        "╭───┬──────┬───────────╮\
+         │ # │  a   │     b     │\
+         ├───┼──────┼───────────┤\
+         │ 0 │ kv   │ ╭───┬───╮ │\
+         │   │      │ │ 0 │ 0 │ │\
+         │   │      │ │ 1 │ 1 │ │\
+         │   │      │ │ 2 │ 2 │ │\
+         │   │      │ │ 3 │ 3 │ │\
+         │   │      │ │ 4 │ 4 │ │\
+         │   │      │ ╰───┴───╯ │\
+         │ 1 │ data │         0 │\
+         │ 2 │ data │         0 │\
+         ╰───┴──────┴───────────╯"
+    );
+
+    let actual = nu!(
+        concat!(
+            "$env.config.table.footer_inheritance = true;",
+            "$env.config.footer_mode = 7;",
+            "[[a b]; ['kv' {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5} ], ['data' 0], ['data' 0] ] | table --expand --width=80",
+        )
+    );
+
+    assert_eq!(
+        actual.out,
+        "╭───┬──────┬───────────╮\
+         │ # │  a   │     b     │\
+         ├───┼──────┼───────────┤\
+         │ 0 │ kv   │ ╭───┬───╮ │\
+         │   │      │ │ 0 │ 0 │ │\
+         │   │      │ │ 1 │ 1 │ │\
+         │   │      │ │ 2 │ 2 │ │\
+         │   │      │ │ 3 │ 3 │ │\
+         │   │      │ │ 4 │ 4 │ │\
+         │   │      │ │ 5 │ 5 │ │\
+         │   │      │ ╰───┴───╯ │\
+         │ 1 │ data │         0 │\
+         │ 2 │ data │         0 │\
+         ├───┼──────┼───────────┤\
+         │ # │  a   │     b     │\
+         ╰───┴──────┴───────────╯"
+    );
+}
+
+#[test]
+fn table_footer_inheritance_list_rows() {
+    let actual = nu!(
+        concat!(
+            "$env.config.table.footer_inheritance = true;",
+            "$env.config.footer_mode = 7;",
+            "[[a b]; ['kv' {0: [[field]; [0] [1] [2] [3] [4]]} ], ['data' 0], ['data' 0] ] | table --expand --width=80",
+        )
+    );
+
+    assert_eq!(
+        actual.out,
+        "╭───┬──────┬───────────────────────╮\
+         │ # │  a   │           b           │\
+         ├───┼──────┼───────────────────────┤\
+         │ 0 │ kv   │ ╭───┬───────────────╮ │\
+         │   │      │ │   │ ╭───┬───────╮ │ │\
+         │   │      │ │ 0 │ │ # │ field │ │ │\
+         │   │      │ │   │ ├───┼───────┤ │ │\
+         │   │      │ │   │ │ 0 │     0 │ │ │\
+         │   │      │ │   │ │ 1 │     1 │ │ │\
+         │   │      │ │   │ │ 2 │     2 │ │ │\
+         │   │      │ │   │ │ 3 │     3 │ │ │\
+         │   │      │ │   │ │ 4 │     4 │ │ │\
+         │   │      │ │   │ ╰───┴───────╯ │ │\
+         │   │      │ ╰───┴───────────────╯ │\
+         │ 1 │ data │                     0 │\
+         │ 2 │ data │                     0 │\
+         ╰───┴──────┴───────────────────────╯"
+    );
+
+    let actual = nu!(
+        concat!(
+            "$env.config.table.footer_inheritance = true;",
+            "$env.config.footer_mode = 7;",
+            "[[a b]; ['kv' {0: [[field]; [0] [1] [2] [3] [4] [5]]} ], ['data' 0], ['data' 0] ] | table --expand --width=80",
+        )
+    );
+
+    assert_eq!(
+        actual.out,
+        "╭───┬──────┬───────────────────────╮\
+         │ # │  a   │           b           │\
+         ├───┼──────┼───────────────────────┤\
+         │ 0 │ kv   │ ╭───┬───────────────╮ │\
+         │   │      │ │   │ ╭───┬───────╮ │ │\
+         │   │      │ │ 0 │ │ # │ field │ │ │\
+         │   │      │ │   │ ├───┼───────┤ │ │\
+         │   │      │ │   │ │ 0 │     0 │ │ │\
+         │   │      │ │   │ │ 1 │     1 │ │ │\
+         │   │      │ │   │ │ 2 │     2 │ │ │\
+         │   │      │ │   │ │ 3 │     3 │ │ │\
+         │   │      │ │   │ │ 4 │     4 │ │ │\
+         │   │      │ │   │ │ 5 │     5 │ │ │\
+         │   │      │ │   │ ╰───┴───────╯ │ │\
+         │   │      │ ╰───┴───────────────╯ │\
+         │ 1 │ data │                     0 │\
+         │ 2 │ data │                     0 │\
+         ├───┼──────┼───────────────────────┤\
+         │ # │  a   │           b           │\
+         ╰───┴──────┴───────────────────────╯"
+    );
+}

crates/nu-command/tests/commands/ucp.rs

@@ -841,14 +841,13 @@ fn test_cp_arg_no_clobber() {
         let target = dirs.fixtures.join("cp").join(TEST_HOW_ARE_YOU_SOURCE);
         let target_hash = get_file_hash(target.display());
 
-        let actual = nu!(
+        let _ = nu!(
             cwd: dirs.root(),
             "cp {} {} --no-clobber",
             src.display(),
             target.display()
         );
         let after_cp_hash = get_file_hash(target.display());
-        assert!(actual.err.contains("not replacing"));
         // Check content was not clobbered
         assert_eq!(after_cp_hash, target_hash);
     });

crates/nu-command/tests/commands/url/join.rs

@@ -411,12 +411,9 @@ fn url_join_with_params_invalid_table() {
                 "host": "localhost",
                 "params": (
                     [
-                        ["key", "value"];
+                        { key: foo, value: bar }
-                        ["par_1", "aaa"],
+                        "not a record"
-                        ["par_2", "bbb"],
+                    ]
-                        ["par_1", "ccc"],
-                        ["par_2", "ddd"],
-                    ] ++ ["not a record"]
                 ),
                 "port": "1234",
             } | url join

crates/nu-command/tests/commands/utouch.rs

@@ -0,0 +1,740 @@
+use chrono::{DateTime, Days, Local, TimeDelta, Utc};
+use filetime::FileTime;
+use nu_test_support::fs::{files_exist_at, Stub};
+use nu_test_support::nu;
+use nu_test_support::playground::{Dirs, Playground};
+use std::path::Path;
+
+// Use 1 instead of 0 because 0 has a special meaning in Windows
+const TIME_ONE: FileTime = FileTime::from_unix_time(1, 0);
+
+fn file_times(file: impl AsRef<Path>) -> (FileTime, FileTime) {
+    (
+        file.as_ref().metadata().unwrap().accessed().unwrap().into(),
+        file.as_ref().metadata().unwrap().modified().unwrap().into(),
+    )
+}
+
+fn symlink_times(path: &nu_path::AbsolutePath) -> (filetime::FileTime, filetime::FileTime) {
+    let metadata = path.symlink_metadata().unwrap();
+
+    (
+        filetime::FileTime::from_system_time(metadata.accessed().unwrap()),
+        filetime::FileTime::from_system_time(metadata.modified().unwrap()),
+    )
+}
+
+// From https://github.com/nushell/nushell/pull/14214
+fn setup_symlink_fs(dirs: &Dirs, sandbox: &mut Playground<'_>) {
+    sandbox.mkdir("d");
+    sandbox.with_files(&[Stub::EmptyFile("f"), Stub::EmptyFile("d/f")]);
+    sandbox.symlink("f", "fs");
+    sandbox.symlink("d", "ds");
+    sandbox.symlink("d/f", "fds");
+
+    // sandbox.symlink does not handle symlinks to missing files well. It panics
+    // But they are useful, and they should be tested.
+    #[cfg(unix)]
+    {
+        std::os::unix::fs::symlink(dirs.test().join("m"), dirs.test().join("fms")).unwrap();
+    }
+
+    #[cfg(windows)]
+    {
+        std::os::windows::fs::symlink_file(dirs.test().join("m"), dirs.test().join("fms")).unwrap();
+    }
+
+    // Change the file times to a known "old" value for comparison
+    filetime::set_symlink_file_times(dirs.test().join("f"), TIME_ONE, TIME_ONE).unwrap();
+    filetime::set_symlink_file_times(dirs.test().join("d"), TIME_ONE, TIME_ONE).unwrap();
+    filetime::set_symlink_file_times(dirs.test().join("d/f"), TIME_ONE, TIME_ONE).unwrap();
+    filetime::set_symlink_file_times(dirs.test().join("ds"), TIME_ONE, TIME_ONE).unwrap();
+    filetime::set_symlink_file_times(dirs.test().join("fs"), TIME_ONE, TIME_ONE).unwrap();
+    filetime::set_symlink_file_times(dirs.test().join("fds"), TIME_ONE, TIME_ONE).unwrap();
+    filetime::set_symlink_file_times(dirs.test().join("fms"), TIME_ONE, TIME_ONE).unwrap();
+}
+
+#[test]
+fn creates_a_file_when_it_doesnt_exist() {
+    Playground::setup("create_test_1", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "utouch i_will_be_created.txt"
+        );
+
+        let path = dirs.test().join("i_will_be_created.txt");
+        assert!(path.exists());
+    })
+}
+
+#[test]
+fn creates_two_files() {
+    Playground::setup("create_test_2", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "utouch a b"
+        );
+
+        let path = dirs.test().join("a");
+        assert!(path.exists());
+
+        let path2 = dirs.test().join("b");
+        assert!(path2.exists());
+    })
+}
+
+#[test]
+fn change_modified_time_of_file_to_today() {
+    Playground::setup("change_time_test_9", |dirs, sandbox| {
+        sandbox.with_files(&[Stub::EmptyFile("file.txt")]);
+        let path = dirs.test().join("file.txt");
+
+        // Set file.txt's times to the past before the test to make sure `utouch` actually changes the mtime to today
+        filetime::set_file_times(&path, TIME_ONE, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -m file.txt"
+        );
+
+        let metadata = path.metadata().unwrap();
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let mtime_day = DateTime::<Local>::from(metadata.modified().unwrap()).date_naive();
+
+        assert_eq!(today, mtime_day);
+
+        // Check that atime remains unchanged
+        assert_eq!(
+            TIME_ONE,
+            FileTime::from_system_time(metadata.accessed().unwrap())
+        );
+    })
+}
+
+#[test]
+fn change_access_time_of_file_to_today() {
+    Playground::setup("change_time_test_18", |dirs, sandbox| {
+        sandbox.with_files(&[Stub::EmptyFile("file.txt")]);
+        let path = dirs.test().join("file.txt");
+
+        // Set file.txt's times to the past before the test to make sure `utouch` actually changes the atime to today
+        filetime::set_file_times(&path, TIME_ONE, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -a file.txt"
+        );
+
+        let metadata = path.metadata().unwrap();
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let atime_day = DateTime::<Local>::from(metadata.accessed().unwrap()).date_naive();
+
+        assert_eq!(today, atime_day);
+
+        // Check that mtime remains unchanged
+        assert_eq!(
+            TIME_ONE,
+            FileTime::from_system_time(metadata.modified().unwrap())
+        );
+    })
+}
+
+#[test]
+fn change_modified_and_access_time_of_file_to_today() {
+    Playground::setup("change_time_test_27", |dirs, sandbox| {
+        sandbox.with_files(&[Stub::EmptyFile("file.txt")]);
+        let path = dirs.test().join("file.txt");
+
+        filetime::set_file_times(&path, TIME_ONE, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -a -m file.txt"
+        );
+
+        let metadata = path.metadata().unwrap();
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let mtime_day = DateTime::<Local>::from(metadata.modified().unwrap()).date_naive();
+        let atime_day = DateTime::<Local>::from(metadata.accessed().unwrap()).date_naive();
+
+        assert_eq!(today, mtime_day);
+        assert_eq!(today, atime_day);
+    })
+}
+
+#[test]
+fn not_create_file_if_it_not_exists() {
+    Playground::setup("change_time_test_28", |dirs, _sandbox| {
+        let outcome = nu!(
+            cwd: dirs.test(),
+            "utouch -c file.txt"
+        );
+
+        let path = dirs.test().join("file.txt");
+
+        assert!(!path.exists());
+
+        // If --no-create is improperly handled `utouch` may error when trying to change the times of a nonexistent file
+        assert!(outcome.status.success())
+    })
+}
+
+#[test]
+fn change_file_times_if_exists_with_no_create() {
+    Playground::setup(
+        "change_file_times_if_exists_with_no_create",
+        |dirs, sandbox| {
+            sandbox.with_files(&[Stub::EmptyFile("file.txt")]);
+            let path = dirs.test().join("file.txt");
+
+            filetime::set_file_times(&path, TIME_ONE, TIME_ONE).unwrap();
+
+            nu!(
+                cwd: dirs.test(),
+                "utouch -c file.txt"
+            );
+
+            let metadata = path.metadata().unwrap();
+
+            // Check only the date since the time may not match exactly
+            let today = Local::now().date_naive();
+            let mtime_day = DateTime::<Local>::from(metadata.modified().unwrap()).date_naive();
+            let atime_day = DateTime::<Local>::from(metadata.accessed().unwrap()).date_naive();
+
+            assert_eq!(today, mtime_day);
+            assert_eq!(today, atime_day);
+        },
+    )
+}
+
+#[test]
+fn creates_file_three_dots() {
+    Playground::setup("create_test_1", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "utouch file..."
+        );
+
+        let path = dirs.test().join("file...");
+        assert!(path.exists());
+    })
+}
+
+#[test]
+fn creates_file_four_dots() {
+    Playground::setup("create_test_1", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "utouch file...."
+        );
+
+        let path = dirs.test().join("file....");
+        assert!(path.exists());
+    })
+}
+
+#[test]
+fn creates_file_four_dots_quotation_marks() {
+    Playground::setup("create_test_1", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "utouch 'file....'"
+        );
+
+        let path = dirs.test().join("file....");
+        assert!(path.exists());
+    })
+}
+
+#[test]
+fn change_file_times_to_reference_file() {
+    Playground::setup("change_dir_times_to_reference_dir", |dirs, sandbox| {
+        sandbox.with_files(&[
+            Stub::EmptyFile("reference_file"),
+            Stub::EmptyFile("target_file"),
+        ]);
+
+        let reference = dirs.test().join("reference_file");
+        let target = dirs.test().join("target_file");
+
+        // Change the times for reference
+        filetime::set_file_times(&reference, FileTime::from_unix_time(1337, 0), TIME_ONE).unwrap();
+
+        // target should have today's date since it was just created, but reference should be different
+        assert_ne!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_ne!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -r reference_file target_file"
+        );
+
+        assert_eq!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_eq!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+    })
+}
+
+#[test]
+fn change_file_mtime_to_reference() {
+    Playground::setup("change_file_mtime_to_reference", |dirs, sandbox| {
+        sandbox.with_files(&[
+            Stub::EmptyFile("reference_file"),
+            Stub::EmptyFile("target_file"),
+        ]);
+
+        let reference = dirs.test().join("reference_file");
+        let target = dirs.test().join("target_file");
+
+        // Change the times for reference
+        filetime::set_file_times(&reference, TIME_ONE, FileTime::from_unix_time(1337, 0)).unwrap();
+
+        // target should have today's date since it was just created, but reference should be different
+        assert_ne!(file_times(&reference), file_times(&target));
+
+        // Save target's current atime to make sure it is preserved
+        let target_original_atime = target.metadata().unwrap().accessed().unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -mr reference_file target_file"
+        );
+
+        assert_eq!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+        assert_ne!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_eq!(
+            target_original_atime,
+            target.metadata().unwrap().accessed().unwrap()
+        );
+    })
+}
+
+// TODO when https://github.com/uutils/coreutils/issues/6629 is fixed,
+// unignore this test
+#[test]
+#[ignore]
+fn change_file_times_to_reference_file_with_date() {
+    Playground::setup(
+        "change_file_times_to_reference_file_with_date",
+        |dirs, sandbox| {
+            sandbox.with_files(&[
+                Stub::EmptyFile("reference_file"),
+                Stub::EmptyFile("target_file"),
+            ]);
+
+            let reference = dirs.test().join("reference_file");
+            let target = dirs.test().join("target_file");
+
+            let now = Utc::now();
+
+            let ref_atime = now;
+            let ref_mtime = now.checked_sub_days(Days::new(5)).unwrap();
+
+            // Change the times for reference
+            filetime::set_file_times(
+                reference,
+                FileTime::from_unix_time(ref_atime.timestamp(), ref_atime.timestamp_subsec_nanos()),
+                FileTime::from_unix_time(ref_mtime.timestamp(), ref_mtime.timestamp_subsec_nanos()),
+            )
+            .unwrap();
+
+            nu!(
+                cwd: dirs.test(),
+                r#"utouch -r reference_file -d "yesterday" target_file"#
+            );
+
+            let (got_atime, got_mtime) = file_times(target);
+            let got = (
+                DateTime::from_timestamp(got_atime.seconds(), got_atime.nanoseconds()).unwrap(),
+                DateTime::from_timestamp(got_mtime.seconds(), got_mtime.nanoseconds()).unwrap(),
+            );
+            assert_eq!(
+                (
+                    now.checked_sub_days(Days::new(1)).unwrap(),
+                    now.checked_sub_days(Days::new(6)).unwrap()
+                ),
+                got
+            );
+        },
+    )
+}
+
+#[test]
+fn change_file_times_to_timestamp() {
+    Playground::setup("change_file_times_to_timestamp", |dirs, sandbox| {
+        sandbox.with_files(&[Stub::EmptyFile("target_file")]);
+
+        let target = dirs.test().join("target_file");
+        let timestamp = DateTime::from_timestamp(TIME_ONE.unix_seconds(), TIME_ONE.nanoseconds())
+            .unwrap()
+            .to_rfc3339();
+
+        nu!(cwd: dirs.test(), format!("utouch --timestamp {} target_file", timestamp));
+
+        assert_eq!((TIME_ONE, TIME_ONE), file_times(target));
+    })
+}
+
+#[test]
+fn change_modified_time_of_dir_to_today() {
+    Playground::setup("change_dir_mtime", |dirs, sandbox| {
+        sandbox.mkdir("test_dir");
+        let path = dirs.test().join("test_dir");
+
+        filetime::set_file_mtime(&path, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -m test_dir"
+        );
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let mtime_day =
+            DateTime::<Local>::from(path.metadata().unwrap().modified().unwrap()).date_naive();
+
+        assert_eq!(today, mtime_day);
+    })
+}
+
+#[test]
+fn change_access_time_of_dir_to_today() {
+    Playground::setup("change_dir_atime", |dirs, sandbox| {
+        sandbox.mkdir("test_dir");
+        let path = dirs.test().join("test_dir");
+
+        filetime::set_file_atime(&path, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -a test_dir"
+        );
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let atime_day =
+            DateTime::<Local>::from(path.metadata().unwrap().accessed().unwrap()).date_naive();
+
+        assert_eq!(today, atime_day);
+    })
+}
+
+#[test]
+fn change_modified_and_access_time_of_dir_to_today() {
+    Playground::setup("change_dir_times", |dirs, sandbox| {
+        sandbox.mkdir("test_dir");
+        let path = dirs.test().join("test_dir");
+
+        filetime::set_file_times(&path, TIME_ONE, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -a -m test_dir"
+        );
+
+        let metadata = path.metadata().unwrap();
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let mtime_day = DateTime::<Local>::from(metadata.modified().unwrap()).date_naive();
+        let atime_day = DateTime::<Local>::from(metadata.accessed().unwrap()).date_naive();
+
+        assert_eq!(today, mtime_day);
+        assert_eq!(today, atime_day);
+    })
+}
+
+// TODO when https://github.com/uutils/coreutils/issues/6629 is fixed,
+// unignore this test
+#[test]
+#[ignore]
+fn change_file_times_to_date() {
+    Playground::setup("change_file_times_to_date", |dirs, sandbox| {
+        sandbox.with_files(&[Stub::EmptyFile("target_file")]);
+
+        let expected = Utc::now().checked_sub_signed(TimeDelta::hours(2)).unwrap();
+        nu!(cwd: dirs.test(), "utouch -d '-2 hours' target_file");
+
+        let (got_atime, got_mtime) = file_times(dirs.test().join("target_file"));
+        let got_atime =
+            DateTime::from_timestamp(got_atime.seconds(), got_atime.nanoseconds()).unwrap();
+        let got_mtime =
+            DateTime::from_timestamp(got_mtime.seconds(), got_mtime.nanoseconds()).unwrap();
+        let threshold = TimeDelta::minutes(1);
+        assert!(
+            got_atime.signed_duration_since(expected).lt(&threshold)
+                && got_mtime.signed_duration_since(expected).lt(&threshold),
+            "Expected: {}. Got: atime={}, mtime={}",
+            expected,
+            got_atime,
+            got_mtime
+        );
+        assert!(got_mtime.signed_duration_since(expected).lt(&threshold));
+    })
+}
+
+#[test]
+fn change_dir_three_dots_times() {
+    Playground::setup("change_dir_three_dots_times", |dirs, sandbox| {
+        sandbox.mkdir("test_dir...");
+        let path = dirs.test().join("test_dir...");
+
+        filetime::set_file_times(&path, TIME_ONE, TIME_ONE).unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch test_dir..."
+        );
+
+        let metadata = path.metadata().unwrap();
+
+        // Check only the date since the time may not match exactly
+        let today = Local::now().date_naive();
+        let mtime_day = DateTime::<Local>::from(metadata.modified().unwrap()).date_naive();
+        let atime_day = DateTime::<Local>::from(metadata.accessed().unwrap()).date_naive();
+
+        assert_eq!(today, mtime_day);
+        assert_eq!(today, atime_day);
+    })
+}
+
+#[test]
+fn change_dir_times_to_reference_dir() {
+    Playground::setup("change_dir_times_to_reference_dir", |dirs, sandbox| {
+        sandbox.mkdir("reference_dir");
+        sandbox.mkdir("target_dir");
+
+        let reference = dirs.test().join("reference_dir");
+        let target = dirs.test().join("target_dir");
+
+        // Change the times for reference
+        filetime::set_file_times(&reference, FileTime::from_unix_time(1337, 0), TIME_ONE).unwrap();
+
+        // target should have today's date since it was just created, but reference should be different
+        assert_ne!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_ne!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -r reference_dir target_dir"
+        );
+
+        assert_eq!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_eq!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+    })
+}
+
+#[test]
+fn change_dir_atime_to_reference() {
+    Playground::setup("change_dir_atime_to_reference", |dirs, sandbox| {
+        sandbox.mkdir("reference_dir");
+        sandbox.mkdir("target_dir");
+
+        let reference = dirs.test().join("reference_dir");
+        let target = dirs.test().join("target_dir");
+
+        // Change the times for reference
+        filetime::set_file_times(&reference, FileTime::from_unix_time(1337, 0), TIME_ONE).unwrap();
+
+        // target should have today's date since it was just created, but reference should be different
+        assert_ne!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_ne!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+
+        // Save target's current mtime to make sure it is preserved
+        let target_original_mtime = target.metadata().unwrap().modified().unwrap();
+
+        nu!(
+            cwd: dirs.test(),
+            "utouch -ar reference_dir target_dir"
+        );
+
+        assert_eq!(
+            reference.metadata().unwrap().accessed().unwrap(),
+            target.metadata().unwrap().accessed().unwrap()
+        );
+        assert_ne!(
+            reference.metadata().unwrap().modified().unwrap(),
+            target.metadata().unwrap().modified().unwrap()
+        );
+        assert_eq!(
+            target_original_mtime,
+            target.metadata().unwrap().modified().unwrap()
+        );
+    })
+}
+
+#[test]
+fn create_a_file_with_tilde() {
+    Playground::setup("utouch with tilde", |dirs, _| {
+        let actual = nu!(cwd: dirs.test(), "utouch '~tilde'");
+        assert!(actual.err.is_empty());
+        assert!(files_exist_at(&[Path::new("~tilde")], dirs.test()));
+
+        // pass variable
+        let actual = nu!(cwd: dirs.test(), "let f = '~tilde2'; utouch $f");
+        assert!(actual.err.is_empty());
+        assert!(files_exist_at(&[Path::new("~tilde2")], dirs.test()));
+    })
+}
+
+#[test]
+fn respects_cwd() {
+    Playground::setup("utouch_respects_cwd", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "mkdir 'dir'; cd 'dir'; utouch 'i_will_be_created.txt'"
+        );
+
+        let path = dirs.test().join("dir/i_will_be_created.txt");
+        assert!(path.exists());
+    })
+}
+
+#[test]
+fn reference_respects_cwd() {
+    Playground::setup("utouch_reference_respects_cwd", |dirs, _sandbox| {
+        nu!(
+            cwd: dirs.test(),
+            "mkdir 'dir'; cd 'dir'; utouch 'ref.txt'; utouch --reference 'ref.txt' 'foo.txt'"
+        );
+
+        let path = dirs.test().join("dir/foo.txt");
+        assert!(path.exists());
+    })
+}
+
+#[test]
+fn recognizes_stdout() {
+    Playground::setup("utouch_recognizes_stdout", |dirs, _sandbox| {
+        nu!(cwd: dirs.test(), "utouch -");
+        assert!(!dirs.test().join("-").exists());
+    })
+}
+
+#[test]
+fn follow_symlinks() {
+    Playground::setup("touch_follows_symlinks", |dirs, sandbox| {
+        setup_symlink_fs(&dirs, sandbox);
+
+        let missing = dirs.test().join("m");
+        assert!(!missing.exists());
+
+        nu!(
+            cwd: dirs.test(),
+            "
+                touch fds
+                touch ds
+                touch fs
+                touch fms
+            "
+        );
+
+        // We created the missing symlink target
+        assert!(missing.exists());
+
+        // The timestamps for files and directories were changed from TIME_ONE
+        let file_times = symlink_times(&dirs.test().join("f"));
+        let dir_times = symlink_times(&dirs.test().join("d"));
+        let dir_file_times = symlink_times(&dirs.test().join("d/f"));
+
+        assert_ne!(file_times, (TIME_ONE, TIME_ONE));
+        assert_ne!(dir_times, (TIME_ONE, TIME_ONE));
+        assert_ne!(dir_file_times, (TIME_ONE, TIME_ONE));
+
+        // For symlinks, they remain (mostly) the same
+        // We can't test accessed times, since to reach the target file, the symlink must be accessed!
+        let file_symlink_times = symlink_times(&dirs.test().join("fs"));
+        let dir_symlink_times = symlink_times(&dirs.test().join("ds"));
+        let dir_file_symlink_times = symlink_times(&dirs.test().join("fds"));
+        let file_missing_symlink_times = symlink_times(&dirs.test().join("fms"));
+
+        assert_eq!(file_symlink_times.1, TIME_ONE);
+        assert_eq!(dir_symlink_times.1, TIME_ONE);
+        assert_eq!(dir_file_symlink_times.1, TIME_ONE);
+        assert_eq!(file_missing_symlink_times.1, TIME_ONE);
+    })
+}
+
+#[test]
+fn no_follow_symlinks() {
+    Playground::setup("touch_touches_symlinks", |dirs, sandbox| {
+        setup_symlink_fs(&dirs, sandbox);
+
+        let missing = dirs.test().join("m");
+        assert!(!missing.exists());
+
+        nu!(
+            cwd: dirs.test(),
+            "
+                touch fds -s
+                touch ds -s
+                touch fs -s
+                touch fms -s
+            "
+        );
+
+        // We did not create the missing symlink target
+        assert!(!missing.exists());
+
+        // The timestamps for files and directories remain the same
+        let file_times = symlink_times(&dirs.test().join("f"));
+        let dir_times = symlink_times(&dirs.test().join("d"));
+        let dir_file_times = symlink_times(&dirs.test().join("d/f"));
+
+        assert_eq!(file_times, (TIME_ONE, TIME_ONE));
+        assert_eq!(dir_times, (TIME_ONE, TIME_ONE));
+        assert_eq!(dir_file_times, (TIME_ONE, TIME_ONE));
+
+        // For symlinks, everything changed. (except their targets, and paths, and personality)
+        let file_symlink_times = symlink_times(&dirs.test().join("fs"));
+        let dir_symlink_times = symlink_times(&dirs.test().join("ds"));
+        let dir_file_symlink_times = symlink_times(&dirs.test().join("fds"));
+        let file_missing_symlink_times = symlink_times(&dirs.test().join("fms"));
+
+        assert_ne!(file_symlink_times, (TIME_ONE, TIME_ONE));
+        assert_ne!(dir_symlink_times, (TIME_ONE, TIME_ONE));
+        assert_ne!(dir_file_symlink_times, (TIME_ONE, TIME_ONE));
+        assert_ne!(file_missing_symlink_times, (TIME_ONE, TIME_ONE));
+    })
+}

crates/nu-command/tests/format_conversions/csv.rs

@@ -469,7 +469,7 @@ fn from_csv_test_flexible_extra_vals() {
           echo "a,b\n1,2,3" | from csv --flexible | first | values | to nuon
         "#
     ));
-    assert_eq!(actual.out, "[1, 2]");
+    assert_eq!(actual.out, "[1, 2, 3]");
 }
 
 #[test]
@@ -479,5 +479,5 @@ fn from_csv_test_flexible_missing_vals() {
           echo "a,b\n1" | from csv --flexible | first | values | to nuon
         "#
     ));
-    assert_eq!(actual.out, "[1, null]");
+    assert_eq!(actual.out, "[1]");
 }

crates/nu-command/tests/format_conversions/ods.rs

@@ -29,3 +29,20 @@ fn from_ods_file_to_table_select_sheet() {
 
     assert_eq!(actual.out, "SalesOrders");
 }
+
+#[test]
+fn from_ods_file_to_table_select_sheet_with_annotations() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            open sample_data_with_annotation.ods --raw
+            | from ods --sheets ["SalesOrders"]
+            | get SalesOrders
+            | get column4
+            | get 0
+        "#
+    ));
+
+    // The Units column in the sheet SalesOrders has an annotation and should be ignored.
+    assert_eq!(actual.out, "Units");
+}

crates/nu-engine/src/compile/operator.rs

@@ -155,7 +155,7 @@ pub(crate) fn decompose_assignment(assignment: Assignment) -> Option<Operator> {
     match assignment {
         Assignment::Assign => None,
         Assignment::PlusAssign => Some(Operator::Math(Math::Plus)),
-        Assignment::AppendAssign => Some(Operator::Math(Math::Append)),
+        Assignment::ConcatAssign => Some(Operator::Math(Math::Concat)),
         Assignment::MinusAssign => Some(Operator::Math(Math::Minus)),
         Assignment::MultiplyAssign => Some(Operator::Math(Math::Multiply)),
         Assignment::DivideAssign => Some(Operator::Math(Math::Divide)),

crates/nu-engine/src/eval.rs

@@ -547,9 +547,9 @@ impl Eval for EvalRuntime {
                 let lhs = eval_expression::<D>(engine_state, stack, lhs)?;
                 lhs.div(op_span, &rhs, op_span)?
             }
-            Assignment::AppendAssign => {
+            Assignment::ConcatAssign => {
                 let lhs = eval_expression::<D>(engine_state, stack, lhs)?;
-                lhs.append(op_span, &rhs, op_span)?
+                lhs.concat(op_span, &rhs, op_span)?
             }
         };
 

crates/nu-engine/src/eval_ir.rs

@@ -956,7 +956,7 @@ fn binary_op(
         },
         Operator::Math(mat) => match mat {
             Math::Plus => lhs_val.add(op_span, &rhs_val, span)?,
-            Math::Append => lhs_val.append(op_span, &rhs_val, span)?,
+            Math::Concat => lhs_val.concat(op_span, &rhs_val, span)?,
             Math::Minus => lhs_val.sub(op_span, &rhs_val, span)?,
             Math::Multiply => lhs_val.mul(op_span, &rhs_val, span)?,
             Math::Divide => lhs_val.div(op_span, &rhs_val, span)?,

crates/nu-explore/Cargo.toml

@@ -27,7 +27,6 @@ nu-pretty-hex = { path = "../nu-pretty-hex", version = "0.100.1" }
 
 anyhow = { workspace = true }
 log = { workspace = true }
-terminal_size = { workspace = true }
 strip-ansi-escapes = { workspace = true }
 crossterm = { workspace = true }
 ratatui = { workspace = true }

crates/nu-explore/src/lib.rs

@@ -9,6 +9,7 @@ mod views;
 
 use anyhow::Result;
 use commands::{ExpandCmd, HelpCmd, NuCmd, QuitCmd, TableCmd, TryCmd};
+use crossterm::terminal::size;
 pub use default_context::add_explore_context;
 pub use explore::Explore;
 use explore::ExploreConfig;
@@ -19,7 +20,6 @@ use nu_protocol::{
 };
 use pager::{Page, Pager, PagerConfig};
 use registry::CommandRegistry;
-use terminal_size::{Height, Width};
 use views::{BinaryView, Orientation, Preview, RecordView};
 
 mod util {
@@ -80,7 +80,7 @@ fn create_record_view(
     }
 
     if config.tail {
-        if let Some((Width(w), Height(h))) = terminal_size::terminal_size() {
+        if let Ok((w, h)) = size() {
             view.tail(w, h);
         }
     }

crates/nu-parser/src/parser.rs

@@ -772,6 +772,51 @@ fn calculate_end_span(
     }
 }
 
+fn parse_oneof(
+    working_set: &mut StateWorkingSet,
+    spans: &[Span],
+    spans_idx: &mut usize,
+    possible_shapes: &Vec<SyntaxShape>,
+    multispan: bool,
+) -> Expression {
+    for shape in possible_shapes {
+        let starting_error_count = working_set.parse_errors.len();
+        let value = match multispan {
+            true => parse_multispan_value(working_set, spans, spans_idx, shape),
+            false => parse_value(working_set, spans[*spans_idx], shape),
+        };
+
+        if starting_error_count == working_set.parse_errors.len() {
+            return value;
+        }
+
+        // while trying the possible shapes, ignore Expected type errors
+        // unless they're inside a block, closure, or expression
+        let propagate_error = match working_set.parse_errors.last() {
+            Some(ParseError::Expected(_, error_span))
+            | Some(ParseError::ExpectedWithStringMsg(_, error_span)) => {
+                matches!(
+                    shape,
+                    SyntaxShape::Block | SyntaxShape::Closure(_) | SyntaxShape::Expression
+                ) && *error_span != spans[*spans_idx]
+            }
+            _ => true,
+        };
+        if !propagate_error {
+            working_set.parse_errors.truncate(starting_error_count);
+        }
+    }
+
+    if working_set.parse_errors.is_empty() {
+        working_set.error(ParseError::ExpectedWithStringMsg(
+            format!("one of a list of accepted shapes: {possible_shapes:?}"),
+            spans[*spans_idx],
+        ));
+    }
+
+    Expression::garbage(working_set, spans[*spans_idx])
+}
+
 pub fn parse_multispan_value(
     working_set: &mut StateWorkingSet,
     spans: &[Span],
@@ -800,54 +845,10 @@ pub fn parse_multispan_value(
 
             arg
         }
-        SyntaxShape::OneOf(shapes) => {
+        SyntaxShape::OneOf(possible_shapes) => {
-            // handle for `if` command.
+            parse_oneof(working_set, spans, spans_idx, possible_shapes, true)
-            //let block_then_exp = shapes.as_slice() == [SyntaxShape::Block, SyntaxShape::Expression];
-            for shape in shapes.iter() {
-                let starting_error_count = working_set.parse_errors.len();
-                let s = parse_multispan_value(working_set, spans, spans_idx, shape);
-
-                if starting_error_count == working_set.parse_errors.len() {
-                    return s;
-                } else if let Some(
-                    ParseError::Expected(..) | ParseError::ExpectedWithStringMsg(..),
-                ) = working_set.parse_errors.last()
-                {
-                    working_set.parse_errors.truncate(starting_error_count);
-                    continue;
-                }
-                // `if` is parsing block first and then expression.
-                // when we're writing something like `else if $a`, parsing as a
-                // block will result to error(because it's not a block)
-                //
-                // If parse as a expression also failed, user is more likely concerned
-                // about expression failure rather than "expect block failure"".
-
-                // FIXME FIXME FIXME
-                // if block_then_exp {
-                //     match &err {
-                //         Some(ParseError::Expected(expected, _)) => {
-                //             if expected.starts_with("block") {
-                //                 err = e
-                //             }
-                //         }
-                //         _ => err = err.or(e),
-                //     }
-                // } else {
-                //     err = err.or(e)
-                // }
-            }
-            let span = spans[*spans_idx];
-
-            if working_set.parse_errors.is_empty() {
-                working_set.error(ParseError::ExpectedWithStringMsg(
-                    format!("one of a list of accepted shapes: {shapes:?}"),
-                    span,
-                ));
         }
 
-            Expression::garbage(working_set, span)
-        }
         SyntaxShape::Expression => {
             trace!("parsing: expression");
 
@@ -3392,6 +3393,7 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
         Arg,
         AfterCommaArg,
         Type,
+        AfterType,
         DefaultValue,
     }
 
@@ -3425,7 +3427,9 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
     let mut args: Vec<Arg> = vec![];
     let mut parse_mode = ParseMode::Arg;
 
-    for token in &output {
+    for (index, token) in output.iter().enumerate() {
+        let last_token = index == output.len() - 1;
+
         match token {
             Token {
                 contents: crate::TokenContents::Item | crate::TokenContents::AssignmentOperator,
@@ -3437,10 +3441,12 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
                 // The : symbol separates types
                 if contents == b":" {
                     match parse_mode {
+                        ParseMode::Arg if last_token => working_set
+                            .error(ParseError::Expected("type", Span::new(span.end, span.end))),
                         ParseMode::Arg => {
                             parse_mode = ParseMode::Type;
                         }
-                        ParseMode::AfterCommaArg => {
+                        ParseMode::AfterCommaArg | ParseMode::AfterType => {
                             working_set.error(ParseError::Expected("parameter or flag", span));
                         }
                         ParseMode::Type | ParseMode::DefaultValue => {
@@ -3452,9 +3458,15 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
                 // The = symbol separates a variable from its default value
                 else if contents == b"=" {
                     match parse_mode {
-                        ParseMode::Type | ParseMode::Arg => {
+                        ParseMode::Arg | ParseMode::AfterType if last_token => working_set.error(
+                            ParseError::Expected("default value", Span::new(span.end, span.end)),
+                        ),
+                        ParseMode::Arg | ParseMode::AfterType => {
                             parse_mode = ParseMode::DefaultValue;
                         }
+                        ParseMode::Type => {
+                            working_set.error(ParseError::Expected("type", span));
+                        }
                         ParseMode::AfterCommaArg => {
                             working_set.error(ParseError::Expected("parameter or flag", span));
                         }
@@ -3467,7 +3479,9 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
                 // The , symbol separates params only
                 else if contents == b"," {
                     match parse_mode {
-                        ParseMode::Arg => parse_mode = ParseMode::AfterCommaArg,
+                        ParseMode::Arg | ParseMode::AfterType => {
+                            parse_mode = ParseMode::AfterCommaArg
+                        }
                         ParseMode::AfterCommaArg => {
                             working_set.error(ParseError::Expected("parameter or flag", span));
                         }
@@ -3480,7 +3494,7 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
                     }
                 } else {
                     match parse_mode {
-                        ParseMode::Arg | ParseMode::AfterCommaArg => {
+                        ParseMode::Arg | ParseMode::AfterCommaArg | ParseMode::AfterType => {
                             // Long flag with optional short form following with no whitespace, e.g. --output, --age(-a)
                             if contents.starts_with(b"--") && contents.len() > 2 {
                                 // Split the long flag from the short flag with the ( character as delimiter.
@@ -3790,7 +3804,7 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
                                     }
                                 }
                             }
-                            parse_mode = ParseMode::Arg;
+                            parse_mode = ParseMode::AfterType;
                         }
                         ParseMode::DefaultValue => {
                             if let Some(last) = args.last_mut() {
@@ -4813,29 +4827,7 @@ pub fn parse_value(
 
         SyntaxShape::ExternalArgument => parse_regular_external_arg(working_set, span),
         SyntaxShape::OneOf(possible_shapes) => {
-            for s in possible_shapes {
+            parse_oneof(working_set, &[span], &mut 0, possible_shapes, false)
-                let starting_error_count = working_set.parse_errors.len();
-                let value = parse_value(working_set, span, s);
-
-                if starting_error_count == working_set.parse_errors.len() {
-                    return value;
-                } else if let Some(
-                    ParseError::Expected(..) | ParseError::ExpectedWithStringMsg(..),
-                ) = working_set.parse_errors.last()
-                {
-                    working_set.parse_errors.truncate(starting_error_count);
-                    continue;
-                }
-            }
-
-            if working_set.parse_errors.is_empty() {
-                working_set.error(ParseError::ExpectedWithStringMsg(
-                    format!("one of a list of accepted shapes: {possible_shapes:?}"),
-                    span,
-                ));
-            }
-
-            Expression::garbage(working_set, span)
         }
 
         SyntaxShape::Any => {
@@ -4895,7 +4887,7 @@ pub fn parse_assignment_operator(working_set: &mut StateWorkingSet, span: Span)
     let operator = match contents {
         b"=" => Operator::Assignment(Assignment::Assign),
         b"+=" => Operator::Assignment(Assignment::PlusAssign),
-        b"++=" => Operator::Assignment(Assignment::AppendAssign),
+        b"++=" => Operator::Assignment(Assignment::ConcatAssign),
         b"-=" => Operator::Assignment(Assignment::MinusAssign),
         b"*=" => Operator::Assignment(Assignment::MultiplyAssign),
         b"/=" => Operator::Assignment(Assignment::DivideAssign),
@@ -5021,7 +5013,7 @@ pub fn parse_operator(working_set: &mut StateWorkingSet, span: Span) -> Expressi
         b"=~" | b"like" => Operator::Comparison(Comparison::RegexMatch),
         b"!~" | b"not-like" => Operator::Comparison(Comparison::NotRegexMatch),
         b"+" => Operator::Math(Math::Plus),
-        b"++" => Operator::Math(Math::Append),
+        b"++" => Operator::Math(Math::Concat),
         b"-" => Operator::Math(Math::Minus),
         b"*" => Operator::Math(Math::Multiply),
         b"/" => Operator::Math(Math::Divide),

crates/nu-parser/src/type_check.rs

@@ -29,8 +29,6 @@ pub fn type_compatible(lhs: &Type, rhs: &Type) -> bool {
 
     match (lhs, rhs) {
         (Type::List(c), Type::List(d)) => type_compatible(c, d),
-        (Type::ListStream, Type::List(_)) => true,
-        (Type::List(_), Type::ListStream) => true,
         (Type::List(c), Type::Table(table_fields)) => {
             if matches!(**c, Type::Any) {
                 return true;
@@ -132,7 +130,7 @@ pub fn math_result_type(
                     )
                 }
             },
-            Operator::Math(Math::Append) => check_append(working_set, lhs, rhs, op),
+            Operator::Math(Math::Concat) => check_concat(working_set, lhs, rhs, op),
             Operator::Math(Math::Minus) => match (&lhs.ty, &rhs.ty) {
                 (Type::Int, Type::Int) => (Type::Int, None),
                 (Type::Float, Type::Int) => (Type::Float, None),
@@ -935,8 +933,8 @@ pub fn math_result_type(
                     )
                 }
             },
-            Operator::Assignment(Assignment::AppendAssign) => {
+            Operator::Assignment(Assignment::ConcatAssign) => {
-                check_append(working_set, lhs, rhs, op)
+                check_concat(working_set, lhs, rhs, op)
             }
             Operator::Assignment(_) => match (&lhs.ty, &rhs.ty) {
                 (x, y) if x == y => (Type::Nothing, None),
@@ -1085,7 +1083,7 @@ pub fn check_block_input_output(working_set: &StateWorkingSet, block: &Block) ->
     output_errors
 }
 
-fn check_append(
+fn check_concat(
     working_set: &mut StateWorkingSet,
     lhs: &Expression,
     rhs: &Expression,
@@ -1099,23 +1097,17 @@ fn check_append(
                 (Type::List(Box::new(Type::Any)), None)
             }
         }
-        (Type::List(a), b) | (b, Type::List(a)) => {
-            if a == &Box::new(b.clone()) {
-                (Type::List(a.clone()), None)
-            } else {
-                (Type::List(Box::new(Type::Any)), None)
-            }
-        }
         (Type::Table(a), Type::Table(_)) => (Type::Table(a.clone()), None),
         (Type::String, Type::String) => (Type::String, None),
         (Type::Binary, Type::Binary) => (Type::Binary, None),
         (Type::Any, _) | (_, Type::Any) => (Type::Any, None),
-        (Type::Table(_) | Type::String | Type::Binary, _) => {
+        (Type::Table(_) | Type::List(_) | Type::String | Type::Binary, _)
+        | (_, Type::Table(_) | Type::List(_) | Type::String | Type::Binary) => {
             *op = Expression::garbage(working_set, op.span);
             (
                 Type::Any,
                 Some(ParseError::UnsupportedOperationRHS(
-                    "append".into(),
+                    "concatenation".into(),
                     op.span,
                     lhs.span,
                     lhs.ty.clone(),
@@ -1129,7 +1121,7 @@ fn check_append(
             (
                 Type::Any,
                 Some(ParseError::UnsupportedOperationLHS(
-                    "append".into(),
+                    "concatenation".into(),
                     op.span,
                     lhs.span,
                     lhs.ty.clone(),

crates/nu-plugin-engine/src/interface/tests.rs

@@ -1485,7 +1485,7 @@ fn prepare_plugin_call_custom_value_op() {
                     span,
                 },
                 CustomValueOp::Operation(
-                    Operator::Math(Math::Append).into_spanned(span),
+                    Operator::Math(Math::Concat).into_spanned(span),
                     cv_ok_val.clone(),
                 ),
             ),
@@ -1498,7 +1498,7 @@ fn prepare_plugin_call_custom_value_op() {
                     span,
                 },
                 CustomValueOp::Operation(
-                    Operator::Math(Math::Append).into_spanned(span),
+                    Operator::Math(Math::Concat).into_spanned(span),
                     cv_bad_val.clone(),
                 ),
             ),

crates/nu-plugin/Cargo.toml

@@ -21,7 +21,7 @@ nu-plugin-core = { path = "../nu-plugin-core", version = "0.100.1", default-feat
 nu-utils = { path = "../nu-utils", version = "0.100.1" }
 
 log = { workspace = true }
-thiserror = "1.0"
+thiserror = "2.0"
 
 [dev-dependencies]
 serde = { workspace = true }

crates/nu-protocol/Cargo.toml

@@ -36,7 +36,7 @@ num-format = { workspace = true }
 rmp-serde = { workspace = true, optional = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
-thiserror = "1.0"
+thiserror = "2.0"
 typetag = "0.2"
 os_pipe = { workspace = true, features = ["io_safety"] }
 log = { workspace = true }

crates/nu-protocol/src/ast/operator.rs

@@ -24,7 +24,7 @@ pub enum Comparison {
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub enum Math {
     Plus,
-    Append,
+    Concat,
     Minus,
     Multiply,
     Divide,
@@ -53,7 +53,7 @@ pub enum Bits {
 pub enum Assignment {
     Assign,
     PlusAssign,
-    AppendAssign,
+    ConcatAssign,
     MinusAssign,
     MultiplyAssign,
     DivideAssign,
@@ -90,7 +90,7 @@ impl Operator {
             | Self::Comparison(Comparison::NotEqual)
             | Self::Comparison(Comparison::In)
             | Self::Comparison(Comparison::NotIn)
-            | Self::Math(Math::Append) => 80,
+            | Self::Math(Math::Concat) => 80,
             Self::Bits(Bits::BitAnd) => 75,
             Self::Bits(Bits::BitXor) => 70,
             Self::Bits(Bits::BitOr) => 60,
@@ -107,7 +107,7 @@ impl Display for Operator {
         match self {
             Operator::Assignment(Assignment::Assign) => write!(f, "="),
             Operator::Assignment(Assignment::PlusAssign) => write!(f, "+="),
-            Operator::Assignment(Assignment::AppendAssign) => write!(f, "++="),
+            Operator::Assignment(Assignment::ConcatAssign) => write!(f, "++="),
             Operator::Assignment(Assignment::MinusAssign) => write!(f, "-="),
             Operator::Assignment(Assignment::MultiplyAssign) => write!(f, "*="),
             Operator::Assignment(Assignment::DivideAssign) => write!(f, "/="),
@@ -124,7 +124,7 @@ impl Display for Operator {
             Operator::Comparison(Comparison::In) => write!(f, "in"),
             Operator::Comparison(Comparison::NotIn) => write!(f, "not-in"),
             Operator::Math(Math::Plus) => write!(f, "+"),
-            Operator::Math(Math::Append) => write!(f, "++"),
+            Operator::Math(Math::Concat) => write!(f, "++"),
             Operator::Math(Math::Minus) => write!(f, "-"),
             Operator::Math(Math::Multiply) => write!(f, "*"),
             Operator::Math(Math::Divide) => write!(f, "/"),

crates/nu-protocol/src/engine/engine_state.rs

@@ -698,7 +698,7 @@ impl EngineState {
 
     pub fn find_commands_by_predicate(
         &self,
-        predicate: impl Fn(&[u8]) -> bool,
+        mut predicate: impl FnMut(&[u8]) -> bool,
         ignore_deprecated: bool,
     ) -> Vec<(Vec<u8>, Option<String>, CommandType)> {
         let mut output = vec![];

crates/nu-protocol/src/engine/state_working_set.rs

@@ -724,7 +724,7 @@ impl<'a> StateWorkingSet<'a> {
 
     pub fn find_commands_by_predicate(
         &self,
-        predicate: impl Fn(&[u8]) -> bool,
+        mut predicate: impl FnMut(&[u8]) -> bool,
         ignore_deprecated: bool,
     ) -> Vec<(Vec<u8>, Option<String>, CommandType)> {
         let mut output = vec![];

crates/nu-protocol/src/errors/shell_error.rs

@@ -1330,14 +1330,15 @@ This is an internal Nushell error, please file an issue https://github.com/nushe
         span: Span,
     },
 
-    #[error("Deprecated: {old_command}")]
+    #[error("{deprecated} is deprecated and will be removed in a future release")]
-    #[diagnostic(help("for more info see {url}"))]
+    #[diagnostic()]
     Deprecated {
-        old_command: String,
+        deprecated: &'static str,
-        new_suggestion: String,
+        suggestion: &'static str,
-        #[label("`{old_command}` is deprecated and will be removed in a future release. Please {new_suggestion} instead.")]
+        #[label("{deprecated} is deprecated. {suggestion}")]
         span: Span,
-        url: String,
+        #[help]
+        help: Option<&'static str>,
     },
 
     /// Invalid glob pattern

crates/nu-protocol/src/eval_base.rs

@@ -238,7 +238,7 @@ pub trait Eval {
                             Math::Minus => lhs.sub(op_span, &rhs, expr_span),
                             Math::Multiply => lhs.mul(op_span, &rhs, expr_span),
                             Math::Divide => lhs.div(op_span, &rhs, expr_span),
-                            Math::Append => lhs.append(op_span, &rhs, expr_span),
+                            Math::Concat => lhs.concat(op_span, &rhs, expr_span),
                             Math::Modulo => lhs.modulo(op_span, &rhs, expr_span),
                             Math::FloorDivision => lhs.floor_div(op_span, &rhs, expr_span),
                             Math::Pow => lhs.pow(op_span, &rhs, expr_span),

crates/nu-protocol/src/pipeline/pipeline_data.rs

@@ -109,7 +109,7 @@ impl PipelineData {
     /// than would be returned by [`Value::get_type()`] on the result of
     /// [`.into_value()`](Self::into_value).
     ///
-    /// Specifically, a `ListStream` results in [`list stream`](Type::ListStream) rather than
+    /// Specifically, a `ListStream` results in `list<any>` rather than
     /// the fully complete [`list`](Type::List) type (which would require knowing the contents),
     /// and a `ByteStream` with [unknown](crate::ByteStreamType::Unknown) type results in
     /// [`any`](Type::Any) rather than [`string`](Type::String) or [`binary`](Type::Binary).
@@ -117,7 +117,7 @@ impl PipelineData {
         match self {
             PipelineData::Empty => Type::Nothing,
             PipelineData::Value(value, _) => value.get_type(),
-            PipelineData::ListStream(_, _) => Type::ListStream,
+            PipelineData::ListStream(_, _) => Type::list(Type::Any),
             PipelineData::ByteStream(stream, _) => stream.type_().into(),
         }
     }
@@ -203,7 +203,7 @@ impl PipelineData {
     ) -> Result<Self, ShellError> {
         match stack.pipe_stdout().unwrap_or(&OutDest::Inherit) {
             OutDest::Print => {
-                self.print(engine_state, stack, false, false)?;
+                self.print_table(engine_state, stack, false, false)?;
                 Ok(Self::Empty)
             }
             OutDest::Pipe | OutDest::PipeSeparate => Ok(self),
@@ -534,11 +534,14 @@ impl PipelineData {
         }
     }
 
-    /// Consume and print self data immediately.
+    /// Consume and print self data immediately, formatted using table command.
+    ///
+    /// This does not respect the display_output hook. If a value is being printed out by a command,
+    /// this function should be used. Otherwise, `nu_cli::util::print_pipeline` should be preferred.
     ///
     /// `no_newline` controls if we need to attach newline character to output.
     /// `to_stderr` controls if data is output to stderr, when the value is false, the data is output to stdout.
-    pub fn print(
+    pub fn print_table(
         self,
         engine_state: &EngineState,
         stack: &mut Stack,

crates/nu-protocol/src/ty.rs

@@ -23,7 +23,6 @@ pub enum Type {
     Float,
     Int,
     List(Box<Type>),
-    ListStream,
     #[default]
     Nothing,
     Number,
@@ -121,7 +120,6 @@ impl Type {
             Type::Nothing => SyntaxShape::Nothing,
             Type::Record(entries) => SyntaxShape::Record(mk_shape(entries)),
             Type::Table(columns) => SyntaxShape::Table(mk_shape(columns)),
-            Type::ListStream => SyntaxShape::List(Box::new(SyntaxShape::Any)),
             Type::Any => SyntaxShape::Any,
             Type::Error => SyntaxShape::Any,
             Type::Binary => SyntaxShape::Binary,
@@ -151,7 +149,6 @@ impl Type {
             Type::Nothing => String::from("nothing"),
             Type::Number => String::from("number"),
             Type::String => String::from("string"),
-            Type::ListStream => String::from("list-stream"),
             Type::Any => String::from("any"),
             Type::Error => String::from("error"),
             Type::Binary => String::from("binary"),
@@ -209,7 +206,6 @@ impl Display for Type {
             Type::Nothing => write!(f, "nothing"),
             Type::Number => write!(f, "number"),
             Type::String => write!(f, "string"),
-            Type::ListStream => write!(f, "list-stream"),
             Type::Any => write!(f, "any"),
             Type::Error => write!(f, "error"),
             Type::Binary => write!(f, "binary"),

crates/nu-protocol/src/value/mod.rs

@@ -2503,34 +2503,20 @@ impl Value {
         }
     }
 
-    pub fn append(&self, op: Span, rhs: &Value, span: Span) -> Result<Value, ShellError> {
+    pub fn concat(&self, op: Span, rhs: &Value, span: Span) -> Result<Value, ShellError> {
         match (self, rhs) {
             (Value::List { vals: lhs, .. }, Value::List { vals: rhs, .. }) => {
-                let mut lhs = lhs.clone();
+                Ok(Value::list([lhs.as_slice(), rhs.as_slice()].concat(), span))
-                let mut rhs = rhs.clone();
-                lhs.append(&mut rhs);
-                Ok(Value::list(lhs, span))
-            }
-            (Value::List { vals: lhs, .. }, val) => {
-                let mut lhs = lhs.clone();
-                lhs.push(val.clone());
-                Ok(Value::list(lhs, span))
-            }
-            (val, Value::List { vals: rhs, .. }) => {
-                let mut rhs = rhs.clone();
-                rhs.insert(0, val.clone());
-                Ok(Value::list(rhs, span))
             }
             (Value::String { val: lhs, .. }, Value::String { val: rhs, .. }) => {
-                Ok(Value::string(lhs.to_string() + rhs, span))
+                Ok(Value::string([lhs.as_str(), rhs.as_str()].join(""), span))
-            }
-            (Value::Binary { val: lhs, .. }, Value::Binary { val: rhs, .. }) => {
-                let mut val = lhs.clone();
-                val.extend(rhs);
-                Ok(Value::binary(val, span))
             }
+            (Value::Binary { val: lhs, .. }, Value::Binary { val: rhs, .. }) => Ok(Value::binary(
+                [lhs.as_slice(), rhs.as_slice()].concat(),
+                span,
+            )),
             (Value::Custom { val: lhs, .. }, rhs) => {
-                lhs.operation(self.span(), Operator::Math(Math::Append), op, rhs)
+                lhs.operation(self.span(), Operator::Math(Math::Concat), op, rhs)
             }
             _ => Err(ShellError::OperatorMismatch {
                 op_span: op,

crates/nu-protocol/tests/into_config.rs

@@ -35,7 +35,7 @@ fn config_affected_when_mutated() {
 
 #[test]
 fn config_affected_when_deep_mutated() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[
         r#"source default_config.nu"#,
         r#"$env.config.filesize.metric = true"#,
         r#"20mib | into string"#]));
@@ -45,7 +45,7 @@ fn config_affected_when_deep_mutated() {
 
 #[test]
 fn config_add_unsupported_key() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[
         r#"source default_config.nu"#,
         r#"$env.config.foo = 2"#,
         r#";"#]));
@@ -57,7 +57,7 @@ fn config_add_unsupported_key() {
 
 #[test]
 fn config_add_unsupported_type() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[r#"source default_config.nu"#,
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[r#"source default_config.nu"#,
         r#"$env.config.ls = '' "#,
         r#";"#]));
 
@@ -66,7 +66,7 @@ fn config_add_unsupported_type() {
 
 #[test]
 fn config_add_unsupported_value() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[r#"source default_config.nu"#,
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[r#"source default_config.nu"#,
         r#"$env.config.history.file_format = ''"#,
         r#";"#]));
 
@@ -77,7 +77,7 @@ fn config_add_unsupported_value() {
 #[test]
 #[ignore = "Figure out how to make test_bins::nu_repl() continue execution after shell errors"]
 fn config_unsupported_key_reverted() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[r#"source default_config.nu"#,
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[r#"source default_config.nu"#,
         r#"$env.config.foo = 1"#,
         r#"'foo' in $env.config"#]));
 
@@ -87,7 +87,7 @@ fn config_unsupported_key_reverted() {
 #[test]
 #[ignore = "Figure out how to make test_bins::nu_repl() continue execution after shell errors"]
 fn config_unsupported_type_reverted() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[r#" source default_config.nu"#,
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[r#" source default_config.nu"#,
         r#"$env.config.ls = ''"#,
         r#"$env.config.ls | describe"#]));
 
@@ -97,7 +97,7 @@ fn config_unsupported_type_reverted() {
 #[test]
 #[ignore = "Figure out how to make test_bins::nu_repl() continue execution after errors"]
 fn config_unsupported_value_reverted() {
-    let actual = nu!(cwd: "crates/nu-utils/src/sample_config", nu_repl_code(&[r#" source default_config.nu"#,
+    let actual = nu!(cwd: "crates/nu-utils/src/default_files", nu_repl_code(&[r#" source default_config.nu"#,
         r#"$env.config.history.file_format = 'plaintext'"#,
         r#"$env.config.history.file_format = ''"#,
         r#"$env.config.history.file_format | to json"#]));

crates/nu-protocol/tests/test_config.rs

@@ -69,7 +69,7 @@ fn fancy_default_errors() {
 
     assert_eq!(
         actual.err,
-        "Error:   \u{1b}[31m×\u{1b}[0m oh no!\n   ╭─[\u{1b}[36;1;4mline1\u{1b}[0m:1:13]\n \u{1b}[2m1\u{1b}[0m │ force_error \"My error\"\n   · \u{1b}[35;1m            ─────┬────\u{1b}[0m\n   ·                  \u{1b}[35;1m╰── \u{1b}[35;1mhere's the error\u{1b}[0m\u{1b}[0m\n   ╰────\n\n\n"
+        "Error: \n  \u{1b}[31m×\u{1b}[0m oh no!\n   ╭─[\u{1b}[36;1;4mline1:1:13\u{1b}[0m]\n \u{1b}[2m1\u{1b}[0m │ force_error \"My error\"\n   · \u{1b}[35;1m            ─────┬────\u{1b}[0m\n   ·                  \u{1b}[35;1m╰── \u{1b}[35;1mhere's the error\u{1b}[0m\u{1b}[0m\n   ╰────\n\n"
     );
 }
 

crates/nu-std/src/lib.rs

@@ -54,6 +54,7 @@ pub fn load_standard_library(
         ("mod.nu", "std/math", include_str!("../std/math/mod.nu")),
         ("mod.nu", "std/util", include_str!("../std/util/mod.nu")),
         ("mod.nu", "std/xml", include_str!("../std/xml/mod.nu")),
+        ("mod.nu", "std/config", include_str!("../std/config/mod.nu")),
     ];
 
     for (filename, std_subdir_name, content) in std_submodules.drain(..) {

crates/nu-std/std/config/mod.nu

@@ -0,0 +1,139 @@
+# Returns a dark-mode theme that can be assigned to $env.config.color_config
+export def dark-theme [] {
+    {
+        # color for nushell primitives
+        separator: white
+        leading_trailing_space_bg: { attr: n } # no fg, no bg, attr none effectively turns this off
+        header: green_bold
+        empty: blue
+        # Closures can be used to choose colors for specific values.
+        # The value (in this case, a bool) is piped into the closure.
+        # eg) {|| if $in { 'light_cyan' } else { 'light_gray' } }
+        bool: light_cyan
+        int: white
+        filesize: cyan
+        duration: white
+        date: purple
+        range: white
+        float: white
+        string: white
+        nothing: white
+        binary: white
+        cell-path: white
+        row_index: green_bold
+        record: white
+        list: white
+        block: white
+        hints: dark_gray
+        search_result: { bg: red fg: white }
+        shape_and: purple_bold
+        shape_binary: purple_bold
+        shape_block: blue_bold
+        shape_bool: light_cyan
+        shape_closure: green_bold
+        shape_custom: green
+        shape_datetime: cyan_bold
+        shape_directory: cyan
+        shape_external: cyan
+        shape_externalarg: green_bold
+        shape_external_resolved: light_yellow_bold
+        shape_filepath: cyan
+        shape_flag: blue_bold
+        shape_float: purple_bold
+        # shapes are used to change the cli syntax highlighting
+        shape_garbage: { fg: white bg: red attr: b }
+        shape_glob_interpolation: cyan_bold
+        shape_globpattern: cyan_bold
+        shape_int: purple_bold
+        shape_internalcall: cyan_bold
+        shape_keyword: cyan_bold
+        shape_list: cyan_bold
+        shape_literal: blue
+        shape_match_pattern: green
+        shape_matching_brackets: { attr: u }
+        shape_nothing: light_cyan
+        shape_operator: yellow
+        shape_or: purple_bold
+        shape_pipe: purple_bold
+        shape_range: yellow_bold
+        shape_record: cyan_bold
+        shape_redirection: purple_bold
+        shape_signature: green_bold
+        shape_string: green
+        shape_string_interpolation: cyan_bold
+        shape_table: blue_bold
+        shape_variable: purple
+        shape_vardecl: purple
+        shape_raw_string: light_purple
+    }
+}
+
+# Returns a light-mode theme that can be assigned to $env.config.color_config
+export def light-theme [] {
+    {
+        # color for nushell primitives
+        separator: dark_gray
+        leading_trailing_space_bg: { attr: n } # no fg, no bg, attr none effectively turns this off
+        header: green_bold
+        empty: blue
+        # Closures can be used to choose colors for specific values.
+        # The value (in this case, a bool) is piped into the closure.
+        # eg) {|| if $in { 'dark_cyan' } else { 'dark_gray' } }
+        bool: dark_cyan
+        int: dark_gray
+        filesize: cyan_bold
+        duration: dark_gray
+        date: purple
+        range: dark_gray
+        float: dark_gray
+        string: dark_gray
+        nothing: dark_gray
+        binary: dark_gray
+        cell-path: dark_gray
+        row_index: green_bold
+        record: dark_gray
+        list: dark_gray
+        block: dark_gray
+        hints: dark_gray
+        search_result: { fg: white bg: red }
+        shape_and: purple_bold
+        shape_binary: purple_bold
+        shape_block: blue_bold
+        shape_bool: light_cyan
+        shape_closure: green_bold
+        shape_custom: green
+        shape_datetime: cyan_bold
+        shape_directory: cyan
+        shape_external: cyan
+        shape_externalarg: green_bold
+        shape_external_resolved: light_purple_bold
+        shape_filepath: cyan
+        shape_flag: blue_bold
+        shape_float: purple_bold
+        # shapes are used to change the cli syntax highlighting
+        shape_garbage: { fg: white bg: red attr: b }
+        shape_glob_interpolation: cyan_bold
+        shape_globpattern: cyan_bold
+        shape_int: purple_bold
+        shape_internalcall: cyan_bold
+        shape_keyword: cyan_bold
+        shape_list: cyan_bold
+        shape_literal: blue
+        shape_match_pattern: green
+        shape_matching_brackets: { attr: u }
+        shape_nothing: light_cyan
+        shape_operator: yellow
+        shape_or: purple_bold
+        shape_pipe: purple_bold
+        shape_range: yellow_bold
+        shape_record: cyan_bold
+        shape_redirection: purple_bold
+        shape_signature: green_bold
+        shape_string: green
+        shape_string_interpolation: cyan_bold
+        shape_table: blue_bold
+        shape_variable: purple
+        shape_vardecl: purple
+        shape_raw_string: light_purple
+    }
+}

crates/nu-std/std/formats/mod.nu

@@ -28,3 +28,13 @@ export def "to ndjson" []: any -> string {
 export def "to jsonl" []: any -> string {
     each { to json --raw } | to text
 }
+
+# Convert from NDNUON (newline-delimited NUON), to structured data
+export def "from ndnuon" []: [string -> any] {
+    lines | each { from nuon }
+}
+
+# Convert structured data to NDNUON, i.e. newline-delimited NUON
+export def "to ndnuon" []: [any -> string] {
+    each { to nuon --raw } | to text
+}

crates/nu-std/std/help/mod.nu

@@ -37,7 +37,7 @@ def get-all-operators [] { return [
 
     [Assignment, =, Assign, "Assigns a value to a variable.", 10]
     [Assignment, +=, PlusAssign, "Adds a value to a variable.", 10]
-    [Assignment, ++=, AppendAssign, "Appends a list or a value to a variable.", 10]
+    [Assignment, ++=, ConcatAssign, "Concatenate two lists, two strings, or two binary values.", 10]
     [Assignment, -=, MinusAssign, "Subtracts a value from a variable.", 10]
     [Assignment, *=, MultiplyAssign, "Multiplies a variable by a value.", 10]
     [Assignment, /=, DivideAssign, "Divides a variable by a value.", 10]
@@ -55,7 +55,7 @@ def get-all-operators [] { return [
     [Comparison, ends-with, EndsWith, "Checks if a string ends with another.", 80]
     [Comparison, not, UnaryNot, "Negates a value or expression.", 0]
     [Math, +, Plus, "Adds two values.", 90]
-    [Math, ++, Append, "Appends two lists or a list and a value.", 80]
+    [Math, ++, Concat, "Concatenate two lists, two strings, or two binary values.", 80]
     [Math, -, Minus, "Subtracts two values.", 90]
     [Math, *, Multiply, "Multiplies two values.", 95]
     [Math, /, Divide, "Divides two values.", 95]
@@ -684,8 +684,7 @@ def build-command-page [command: record] {
     ] | flatten | str join "\n"
 }
 
-# Show help on commands.
+def scope-commands [
-export def commands [
     ...command: string@"nu-complete list-commands"  # the name of command to get help on
     --find (-f): string  # string to find in command names and description
 ] {
@@ -699,17 +698,32 @@ export def commands [
         let found_command = ($commands | where name == $target_command)
 
         if ($found_command | is-empty) {
-            try {
-                print $"(ansi default_italic)Help pages from external command ($target_command | pretty-cmd):(ansi reset)"
-                ^($env.NU_HELPER? | default "man") $target_command
-            } catch {
             command-not-found-error (metadata $command | get span)
+        } else {
+            build-command-page ($found_command | get 0)
+        }
+    } else {
+        $commands | select name category description signatures search_terms
     }
 }
 
-        build-command-page ($found_command | get 0)
+def external-commands [
-    } else {
+    ...command: string@"nu-complete list-commands",
-        $commands | select name category description signatures search_terms
+] {
+    let target_command = $command | str join " "
+    print $"(ansi default_italic)Help pages from external command ($target_command | pretty-cmd):(ansi reset)"
+    ^($env.NU_HELPER? | default "man") $target_command
+}
+
+# Show help on commands.
+export def commands [
+    ...command: string@"nu-complete list-commands"  # the name of command to get help on
+    --find (-f): string  # string to find in command names and description
+] {
+    try {
+        scope-commands ...$command --find=$find
+    } catch {
+        external-commands ...$command
     }
 }
 
@@ -763,7 +777,7 @@ You can also learn more at (ansi default_italic)(ansi light_cyan_underline)https
 
     let target_item = ($item | str join " ")
 
-    let commands = (try { commands $target_item --find $find })
+    let commands = (try { scope-commands $target_item --find $find })
     if not ($commands | is-empty) { return $commands }
 
     let aliases = (try { aliases $target_item --find $find })
@@ -776,13 +790,7 @@ You can also learn more at (ansi default_italic)(ansi light_cyan_underline)https
         print -e $"No help results found mentioning: ($find)"
         return []
     }
-
+    # use external tool (e.g: `man`) to search help for $target_item
-    let span = (metadata $item | get span)
+    # the stdout and stderr of external tool will follow `main` call.
-    error make {
+    external-commands $target_item
-        msg: ("std::help::item_not_found" | error-fmt)
-        label: {
-            text: "item not found"
-            span: $span
-        }
-    }
 }

crates/nu-std/std/mod.nu

@@ -14,6 +14,7 @@ export module std/iter
 export module std/log
 export module std/math
 export module std/xml
+export module std/config
 
 # Load main dirs command and all subcommands
 export use std/dirs main

crates/nu-std/tests/test_formats.nu

@@ -2,8 +2,18 @@
 use std/assert
 use std/formats *
 
-def test_data_multiline [] {
+def test_data_multiline [--nuon] {
-  let lines = [
+  let lines = if $nuon {
+    [
+      "{a: 1}",
+      "{a: 2}",
+      "{a: 3}",
+      "{a: 4}",
+      "{a: 5}",
+      "{a: 6}",
+    ]
+  } else {
+    [
       "{\"a\":1}",
       "{\"a\":2}",
       "{\"a\":3}",
@@ -11,6 +21,7 @@ def test_data_multiline [] {
       "{\"a\":5}",
       "{\"a\":6}",
     ]
+  }
 
   if $nu.os-info.name == "windows" {
     $lines | str join "\r\n"
@@ -84,3 +95,36 @@ def to_jsonl_single_object [] {
   let expect = "{\"a\":1}"
   assert equal $result $expect "could not convert to JSONL"
 }
+
+#[test]
+def from_ndnuon_multiple_objects [] {
+  let result = test_data_multiline | from ndnuon
+  let expect = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_single_object [] {
+  let result = '{a: 1}' | from ndnuon
+  let expect = [{a:1}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_invalid_object [] {
+  assert error { '{"a":1' | formats from ndnuon }
+}
+
+#[test]
+def to_ndnuon_multiple_objects [] {
+  let result = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6}] | to ndnuon | str trim
+  let expect = test_data_multiline --nuon
+  assert equal $result $expect "could not convert to NDNUON"
+}
+
+#[test]
+def to_ndnuon_single_object [] {
+  let result = [{a:1}] | to ndnuon | str trim
+  let expect = "{a: 1}"
+  assert equal $result $expect "could not convert to NDNUON"
+}

crates/nu-std/tests/test_std_formats.nu

@@ -1,9 +1,19 @@
 # Test std/formats when importing `use std *`
 use std *
 
-def test_data_multiline [] {
+def test_data_multiline [--nuon] {
   use std *
-  let lines = [
+  let lines = if $nuon {
+    [
+      "{a: 1}",
+      "{a: 2}",
+      "{a: 3}",
+      "{a: 4}",
+      "{a: 5}",
+      "{a: 6}",
+    ]
+  } else {
+    [
       "{\"a\":1}",
       "{\"a\":2}",
       "{\"a\":3}",
@@ -11,6 +21,7 @@ def test_data_multiline [] {
       "{\"a\":5}",
       "{\"a\":6}",
     ]
+  }
 
   if $nu.os-info.name == "windows" {
     $lines | str join "\r\n"
@@ -84,3 +95,36 @@ def to_jsonl_single_object [] {
   let expect = "{\"a\":1}"
   assert equal $result $expect "could not convert to JSONL"
 }
+
+#[test]
+def from_ndnuon_multiple_objects [] {
+  let result = test_data_multiline | formats from ndnuon
+  let expect = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_single_object [] {
+  let result = '{a: 1}' | formats from ndnuon
+  let expect = [{a:1}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_invalid_object [] {
+  assert error { '{"a":1' | formats from ndnuon }
+}
+
+#[test]
+def to_ndnuon_multiple_objects [] {
+  let result = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6}] | formats to ndnuon | str trim
+  let expect = test_data_multiline --nuon
+  assert equal $result $expect "could not convert to NDNUON"
+}
+
+#[test]
+def to_ndnuon_single_object [] {
+  let result = [{a:1}] | formats to ndnuon | str trim
+  let expect = "{a: 1}"
+  assert equal $result $expect "could not convert to NDNUON"
+}

crates/nu-table/src/common.rs

@@ -18,8 +18,12 @@ pub fn create_nu_table_config(
     expand: bool,
     mode: TableMode,
 ) -> NuTableConfig {
-    let with_footer = (config.table.footer_inheritance && out.with_footer)
+    let mut count_rows = out.table.count_rows();
-        || with_footer(config, out.with_header, out.table.count_rows());
+    if config.table.footer_inheritance {
+        count_rows = out.count_rows;
+    }
+
+    let with_footer = with_footer(config, out.with_header, count_rows);
 
     NuTableConfig {
         theme: load_theme(mode),

crates/nu-table/src/table.rs

@@ -615,12 +615,15 @@ fn load_theme(
     if let Some(style) = sep_color {
         let color = convert_style(style);
         let color = ANSIBuf::from(color);
+        // todo: use .modify(Segment::all(), color) --> it has this optimization
         table.get_config_mut().set_border_color_default(color);
     }
 
     if !with_header {
+        // todo: remove and use theme.remove_horizontal_lines();
         table.with(RemoveHorizontalLine);
     } else if with_footer {
+        // todo: remove and set it on theme rather then here...
         table.with(CopyFirstHorizontalLineAtLast);
     }
 }
@@ -1257,6 +1260,7 @@ fn remove_row(recs: &mut NuRecords, row: usize) -> Vec<String> {
     columns
 }
 
+// todo; use Format?
 struct StripColorFromRow(usize);
 
 impl TableOption<NuRecords, ColoredConfig, CompleteDimensionVecRecords<'_>> for StripColorFromRow {