replace lazy_static with once_cell (#7502)

replacing the dependence on `lazy_static` with `once_cell`, this will
ensure that variables are initialized when needed instead of startup
time.

Cargo.lock

@@ -2540,7 +2540,6 @@ dependencies = [
  "fancy-regex",
  "fuzzy-matcher",
  "is_executable",
- "lazy_static",
  "log",
  "miette",
  "nu-ansi-term",
@@ -2553,6 +2552,7 @@ dependencies = [
  "nu-table",
  "nu-test-support",
  "nu-utils",
+ "once_cell",
  "percent-encoding",
  "reedline",
  "rstest",
@@ -2606,7 +2606,6 @@ dependencies = [
  "indexmap",
  "is-root",
  "itertools",
- "lazy_static",
  "libc",
  "log",
  "lscolors",
@@ -2715,8 +2714,6 @@ dependencies = [
 name = "nu-json"
 version = "0.72.2"
 dependencies = [
- "fancy-regex",
- "lazy_static",
  "linked-hash-map",
  "num-traits",
  "serde",
@@ -2843,11 +2840,11 @@ version = "0.72.2"
 dependencies = [
  "getset",
  "hamcrest2",
- "lazy_static",
  "nu-glob",
  "nu-path",
  "nu-utils",
  "num-format",
+ "once_cell",
  "tempfile",
 ]
 

crates/nu-cli/Cargo.toml

@@ -29,7 +29,7 @@ crossterm = "0.24.0"
 fancy-regex = "0.10.0"
 fuzzy-matcher = "0.3.7"
 is_executable = "1.0.1"
-lazy_static = "1.4.0"
+once_cell = "1.16.0"
 log = "0.4"
 miette = { version = "5.1.0", features = ["fancy-no-backtrace"] }
 percent-encoding = "2"

crates/nu-cli/src/repl.rs

@@ -5,8 +5,6 @@ use crate::{
     util::{eval_source, get_guaranteed_cwd, report_error, report_error_new},
     NuHighlighter, NuValidator, NushellPrompt,
 };
-use fancy_regex::Regex;
-use lazy_static::lazy_static;
 use log::{info, trace, warn};
 use miette::{IntoDiagnostic, Result};
 use nu_color_config::StyleComputer;
@@ -1011,11 +1009,12 @@ fn run_ansi_sequence(seq: &str) -> Result<(), ShellError> {
     })
 }
 
-lazy_static! {
-    // Absolute paths with a drive letter, like 'C:', 'D:\', 'E:\foo'
-    static ref DRIVE_PATH_REGEX: Regex =
-        Regex::new(r"^[a-zA-Z]:[/\\]?").expect("Internal error: regex creation");
-}
+// Absolute paths with a drive letter, like 'C:', 'D:\', 'E:\foo'
+#[cfg(windows)]
+static DRIVE_PATH_REGEX: once_cell::sync::Lazy<fancy_regex::Regex> =
+    once_cell::sync::Lazy::new(|| {
+        fancy_regex::Regex::new(r"^[a-zA-Z]:[/\\]?").expect("Internal error: regex creation")
+    });
 
 // A best-effort "does this string look kinda like a path?" function to determine whether to auto-cd
 fn looks_like_path(orig: &str) -> bool {

crates/nu-command/Cargo.toml

@@ -54,7 +54,6 @@ indexmap = { version="1.7", features=["serde-1"] }
 Inflector = "0.11"
 is-root = "0.1.2"
 itertools = "0.10.0"
-lazy_static = "1.4.0"
 log = "0.4.14"
 lscolors = { version = "0.12.0", features = ["crossterm"], default-features = false }
 md5 = { package = "md-5", version = "0.10.0" }

crates/nu-command/src/platform/ansi/ansi_.rs

@@ -1,10 +1,10 @@
-use lazy_static::lazy_static;
 use nu_ansi_term::*;
 use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call, engine::Command, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData,
     PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
+use once_cell::sync::Lazy;
 use std::collections::HashMap;
 
 #[derive(Clone)]
@@ -16,8 +16,8 @@ struct AnsiCode {
     code: String,
 }
 
-lazy_static! {
-    static ref CODE_LIST: Vec<AnsiCode> = vec!{
+#[rustfmt::skip]
+static CODE_LIST: Lazy<Vec<AnsiCode>> = Lazy::new(|| { vec![
     AnsiCode{ short_name: Some("g"), long_name: "green", code: Color::Green.prefix().to_string()},
     AnsiCode{ short_name: Some("gb"), long_name: "green_bold", code: Color::Green.bold().prefix().to_string()},
     AnsiCode{ short_name: Some("gu"), long_name: "green_underline", code: Color::Green.underline().prefix().to_string()},
@@ -476,10 +476,12 @@ lazy_static! {
 
     // Returns terminal size like "[<r>;<c>R" where r is rows and c is columns
     // This should work assuming your terminal is not greater than 999x999
-    AnsiCode{ short_name: None, long_name:"size", code: "\x1b[s\x1b[999;999H\x1b[6n\x1b[u".to_string()},};
+    AnsiCode{ short_name: None, long_name:"size", code: "\x1b[s\x1b[999;999H\x1b[6n\x1b[u".to_string()}
+    ]
+});
 
-    static ref CODE_MAP: HashMap<&'static str, &'static str > = build_ansi_hashmap(&CODE_LIST);
-}
+static CODE_MAP: Lazy<HashMap<&'static str, &'static str>> =
+    Lazy::new(|| build_ansi_hashmap(&CODE_LIST));
 
 impl Command for AnsiCommand {
     fn name(&self) -> &str {
@@ -783,10 +785,10 @@ fn generate_ansi_code_list(
         .into_pipeline_data(engine_state.ctrlc.clone()));
 }
 
-fn build_ansi_hashmap(v: &'static [AnsiCode]) -> HashMap<&'static str, &'static str> {
+fn build_ansi_hashmap(v: &[AnsiCode]) -> HashMap<&str, &str> {
     let mut result = HashMap::new();
     for code in v.iter() {
-        let value: &'static str = &code.code;
+        let value: &str = &code.code;
         if let Some(sn) = code.short_name {
             result.insert(sn, value);
         }

crates/nu-command/src/strings/char_.rs

@@ -1,11 +1,11 @@
 use indexmap::indexmap;
 use indexmap::map::IndexMap;
-use lazy_static::lazy_static;
 use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call, engine::Command, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData,
     PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
+use once_cell::sync::Lazy;
 
 // Character used to separate directories in a Path Environment variable on windows is ";"
 #[cfg(target_family = "windows")]
@@ -17,8 +17,8 @@ const ENV_PATH_SEPARATOR_CHAR: char = ':';
 #[derive(Clone)]
 pub struct Char;
 
-lazy_static! {
-    static ref CHAR_MAP: IndexMap<&'static str, String> = indexmap! {
+static CHAR_MAP: Lazy<IndexMap<&'static str, String>> = Lazy::new(|| {
+    indexmap! {
         // These are some regular characters that either can't be used or
         // it's just easier to use them like this.
 
@@ -146,8 +146,8 @@ lazy_static! {
         "unit_separator" => '\x1f'.to_string(),
         "unit_sep" => '\x1f'.to_string(),
         "us" => '\x1f'.to_string(),
-    };
-}
+    }
+});
 
 impl Command for Char {
     fn name(&self) -> &str {

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

@@ -1,5 +1,5 @@
-use lazy_static::lazy_static;
 use nu_protocol::{ShellError, Span};
+use once_cell::sync::Lazy;
 use std::collections::HashMap;
 use std::path::Path;
 
@@ -85,50 +85,47 @@ impl Icons {
 //         .unwrap_or_default()
 // }
 
-lazy_static! {
-    static ref MAP_BY_NAME: HashMap<&'static str, char> = {
-        let mut m = HashMap::new();
-        m.insert(".Trash", '\u{f1f8}'); // 
-        m.insert(".atom", '\u{e764}'); // 
-        m.insert(".bashprofile", '\u{e615}'); // 
-        m.insert(".bashrc", '\u{f489}'); // 
-        m.insert(".git", '\u{f1d3}'); // 
-        m.insert(".gitattributes", '\u{f1d3}'); // 
-        m.insert(".gitconfig", '\u{f1d3}'); // 
-        m.insert(".github", '\u{f408}'); // 
-        m.insert(".gitignore", '\u{f1d3}'); // 
-        m.insert(".gitmodules", '\u{f1d3}'); // 
-        m.insert(".rvm", '\u{e21e}'); // 
-        m.insert(".vimrc", '\u{e62b}'); // 
-        m.insert(".vscode", '\u{e70c}'); // 
-        m.insert(".zshrc", '\u{f489}'); // 
-        m.insert("Cargo.lock", '\u{e7a8}'); // 
-        m.insert("bin", '\u{e5fc}'); // 
-        m.insert("config", '\u{e5fc}'); // 
-        m.insert("docker-compose.yml", '\u{f308}'); // 
-        m.insert("Dockerfile", '\u{f308}'); // 
-        m.insert("ds_store", '\u{f179}'); // 
-        m.insert("gitignore_global", '\u{f1d3}'); // 
-        m.insert("gradle", '\u{e70e}'); // 
-        m.insert("gruntfile.coffee", '\u{e611}'); // 
-        m.insert("gruntfile.js", '\u{e611}'); // 
-        m.insert("gruntfile.ls", '\u{e611}'); // 
-        m.insert("gulpfile.coffee", '\u{e610}'); // 
-        m.insert("gulpfile.js", '\u{e610}'); // 
-        m.insert("gulpfile.ls", '\u{e610}'); // 
-        m.insert("hidden", '\u{f023}'); // 
-        m.insert("include", '\u{e5fc}'); // 
-        m.insert("lib", '\u{f121}'); // 
-        m.insert("localized", '\u{f179}'); // 
-        m.insert("Makefile", '\u{e779}'); // 
-        m.insert("node_modules", '\u{e718}'); // 
-        m.insert("npmignore", '\u{e71e}'); // 
-        m.insert("rubydoc", '\u{e73b}'); // 
-        m.insert("yarn.lock", '\u{e718}'); // 
-
-        m
-    };
-}
+static MAP_BY_NAME: Lazy<HashMap<&'static str, char>> = Lazy::new(|| {
+    HashMap::from([
+        (".Trash", '\u{f1f8}'),             // 
+        (".atom", '\u{e764}'),              // 
+        (".bashprofile", '\u{e615}'),       // 
+        (".bashrc", '\u{f489}'),            // 
+        (".git", '\u{f1d3}'),               // 
+        (".gitattributes", '\u{f1d3}'),     // 
+        (".gitconfig", '\u{f1d3}'),         // 
+        (".github", '\u{f408}'),            // 
+        (".gitignore", '\u{f1d3}'),         // 
+        (".gitmodules", '\u{f1d3}'),        // 
+        (".rvm", '\u{e21e}'),               // 
+        (".vimrc", '\u{e62b}'),             // 
+        (".vscode", '\u{e70c}'),            // 
+        (".zshrc", '\u{f489}'),             // 
+        ("Cargo.lock", '\u{e7a8}'),         // 
+        ("bin", '\u{e5fc}'),                // 
+        ("config", '\u{e5fc}'),             // 
+        ("docker-compose.yml", '\u{f308}'), // 
+        ("Dockerfile", '\u{f308}'),         // 
+        ("ds_store", '\u{f179}'),           // 
+        ("gitignore_global", '\u{f1d3}'),   // 
+        ("gradle", '\u{e70e}'),             // 
+        ("gruntfile.coffee", '\u{e611}'),   // 
+        ("gruntfile.js", '\u{e611}'),       // 
+        ("gruntfile.ls", '\u{e611}'),       // 
+        ("gulpfile.coffee", '\u{e610}'),    // 
+        ("gulpfile.js", '\u{e610}'),        // 
+        ("gulpfile.ls", '\u{e610}'),        // 
+        ("hidden", '\u{f023}'),             // 
+        ("include", '\u{e5fc}'),            // 
+        ("lib", '\u{f121}'),                // 
+        ("localized", '\u{f179}'),          // 
+        ("Makefile", '\u{e779}'),           // 
+        ("node_modules", '\u{e718}'),       // 
+        ("npmignore", '\u{e71e}'),          // 
+        ("rubydoc", '\u{e73b}'),            // 
+        ("yarn.lock", '\u{e718}'),          // 
+    ])
+});
 
 pub fn icon_for_file(file_path: &Path, span: Span) -> Result<char, ShellError> {
     let extensions = Box::new(FileExtensions);

crates/nu-json/Cargo.toml

@@ -14,8 +14,6 @@ preserve_order = ["linked-hash-map", "linked-hash-map/serde_impl"]
 default = ["preserve_order"]
 
 [dependencies]
-fancy-regex = "0.10.0"
-lazy_static = "1"
 linked-hash-map = { version="0.5", optional=true }
 num-traits = "0.2.14"
 serde = "1.0"

crates/nu-json/src/ser.rs

@@ -10,12 +10,6 @@ use std::num::FpCategory;
 use super::error::{Error, ErrorCode, Result};
 use serde::ser;
 
-//use super::util::ParseNumber;
-
-use fancy_regex::Regex;
-
-use lazy_static::lazy_static;
-
 /// A structure for serializing Rust values into Hjson.
 pub struct Serializer<W, F> {
     writer: W,
@@ -839,15 +833,6 @@ where
     W: io::Write,
     F: Formatter,
 {
-    lazy_static! {
-        // NEEDS_ESCAPE tests if the string can be written without escapes
-        static ref NEEDS_ESCAPE: Regex = Regex::new("[\\\\\"\x00-\x1f\x7f-\u{9f}\u{00ad}\u{0600}-\u{0604}\u{070f}\u{17b4}\u{17b5}\u{200c}-\u{200f}\u{2028}-\u{202f}\u{2060}-\u{206f}\u{feff}\u{fff0}-\u{ffff}]").expect("Internal error: json parsing");
-        // NEEDS_QUOTES tests if the string can be written as a quoteless string (includes needsEscape but without \\ and \")
-        static ref NEEDS_QUOTES: Regex = Regex::new("^\\s|^\"|^'''|^#|^/\\*|^//|^\\{|^\\}|^\\[|^\\]|^:|^,|\\s$|[\x00-\x1f\x7f-\u{9f}\u{00ad}\u{0600}-\u{0604}\u{070f}\u{17b4}\u{17b5}\u{200c}-\u{200f}\u{2028}-\u{202f}\u{2060}-\u{206f}\u{feff}\u{fff0}-\u{ffff}]").expect("Internal error: json parsing");
-        // starts with a keyword and optionally is followed by a comment
-        static ref STARTS_WITH_KEYWORD: Regex = Regex::new(r#"^(true|false|null)\s*((,|\]|\}|#|//|/\*).*)?$"#).expect("Internal error: json parsing");
-    }
-
     if value.is_empty() {
         formatter.start_value(wr)?;
         return escape_bytes(wr, value.as_bytes());
@@ -863,11 +848,6 @@ pub fn escape_key<W>(wr: &mut W, value: &str) -> Result<()>
 where
     W: io::Write,
 {
-    lazy_static! {
-        static ref NEEDS_ESCAPE_NAME: Regex =
-            Regex::new(r#"[,\{\[\}\]\s:#"]|//|/\*|'''|^$"#).expect("Internal error: json parsing");
-    }
-
     escape_bytes(wr, value.as_bytes()).map_err(From::from)
 }
 

crates/nu-test-support/Cargo.toml

@@ -14,7 +14,7 @@ doctest = false
 nu-path = { path="../nu-path", version = "0.72.2"  }
 nu-glob = { path = "../nu-glob", version = "0.72.2" }
 nu-utils = { path="../nu-utils", version = "0.72.2"  }
-lazy_static = "1.4.0"
+once_cell = "1.16.0"
 num-format = "0.4.3"
 
 getset = "0.1.1"

crates/nu-test-support/src/locale_override.rs

@@ -2,12 +2,10 @@
 
 use std::sync::{Arc, Mutex};
 
-use lazy_static::lazy_static;
 use nu_utils::locale::LOCALE_OVERRIDE_ENV_VAR;
+use once_cell::sync::Lazy;
 
-lazy_static! {
-    static ref LOCALE_OVERRIDE_MUTEX: Arc<Mutex<()>> = Arc::new(Mutex::new(()));
-}
+static LOCALE_OVERRIDE_MUTEX: Lazy<Arc<Mutex<()>>> = Lazy::new(Default::default);
 
 /// Run a closure in a fake locale environment.
 ///