Fix support for fish shell (#421)

Cargo.lock

@@ -196,7 +196,7 @@ checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
 
 [[package]]
 name = "navi"
-version = "2.12.0"
+version = "2.12.1"
 dependencies = [
  "anyhow",
  "directories-next",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "navi"
-version = "2.12.0"
+version = "2.12.1"
 authors = ["Denis Isidoro <denis_isidoro@live.com>"]
 edition = "2018"
 description = "An interactive cheatsheet tool for the command-line"

src/cmds/core.rs

@@ -1,6 +1,6 @@
 use crate::cheatsh;
 use crate::common::clipboard;
-use crate::common::shell::BashSpawnError;
+use crate::common::shell::{BashSpawnError, IS_FISH};
 use crate::display;
 use crate::env_vars;
 use crate::fetcher::Fetcher;
@@ -27,7 +27,7 @@ fn gen_core_finder_opts(config: &Config) -> Result<FinderOpts, Error> {
         } else {
             Some(format!("{} preview {{}}", filesystem::exe_string()?))
         },
-        autoselect: !config.get_no_autoselect(),
+        autoselect: config.autoselect(),
         overrides: config.fzf_overrides.clone(),
         suggestion_type: SuggestionType::SnippetSelection,
         query: if config.get_best_match() { None } else { config.get_query() },
@@ -95,18 +95,20 @@ fn prompt_finder(variable_name: &str, config: &Config, suggestion: Option<&Sugge
     };
 
     let mut opts = FinderOpts {
-        autoselect: !config.get_no_autoselect(),
+        autoselect: config.autoselect(),
         overrides: config.fzf_overrides_var.clone(),
         preview: Some(format!(
-            r#"navi preview-var "$(cat <<NAVIEOF
+            r#"{prefix}navi preview-var "$(cat <<NAVIEOF
 {{}}
 NAVIEOF
 )" "$(cat <<NAVIEOF
 {{q}}
 NAVIEOF
-)" "{}"{}"#,
-            variable_name,
-            extra_preview.clone().unwrap_or_default()
+)" "{name}"; {extra}{suffix}"#,
+            prefix = if *IS_FISH { "bash -c '" } else { "" },
+            suffix = if *IS_FISH { "'" } else { "" },
+            name = variable_name,
+            extra = extra_preview.clone().unwrap_or_default()
         )),
         ..opts.clone().unwrap_or_default()
     };
@@ -136,7 +138,7 @@ NAVIEOF
 
 fn unique_result_count(results: &[&str]) -> usize {
     let mut vars = results.to_owned();
-    vars.sort();
+    vars.sort_unstable();
     vars.dedup();
     vars.len()
 }

src/common/shell.rs

@@ -1,6 +1,11 @@
+use std::env;
 use std::fmt::Debug;
 use thiserror::Error;
 
+lazy_static! {
+    pub static ref IS_FISH: bool = env::var("SHELL").unwrap_or_else(|_| "".to_string()).contains(&"fish");
+}
+
 #[derive(Debug)]
 pub enum Shell {
     Bash,

src/fetcher/mod.rs

@@ -5,5 +5,5 @@ use crate::structures::cheat::VariableMap;
 use anyhow::Error;
 
 pub trait Fetcher {
-    fn fetch(self: &Self, stdin: &mut std::process::ChildStdin, writer: &mut dyn Writer) -> Result<Option<VariableMap>, Error>;
+    fn fetch(&self, stdin: &mut std::process::ChildStdin, writer: &mut dyn Writer) -> Result<Option<VariableMap>, Error>;
 }

src/parser.rs

@@ -114,6 +114,14 @@ fn write_cmd(tags: &str, comment: &str, snippet: &str, writer: &mut dyn Writer,
     }
 }
 
+fn without_prefix(line: &str) -> String {
+    if line.len() > 2 {
+        String::from(line[2..].trim())
+    } else {
+        String::from("")
+    }
+}
+
 pub fn read_lines(
     lines: impl Iterator<Item = Result<String, Error>>,
     id: &str,
@@ -145,11 +153,11 @@ pub fn read_lines(
                 should_break = true
             }
             snippet = String::from("");
-            tags = if line.len() > 2 { String::from(&line[2..]) } else { String::from("") };
+            tags = without_prefix(&line);
         }
         // dependency
         else if line.starts_with('@') {
-            let tags_dependency = if line.len() > 2 { String::from(&line[2..]) } else { String::from("") };
+            let tags_dependency = without_prefix(&line);
             variables.insert_dependency(&tags, &tags_dependency);
         }
         // metacomment
@@ -161,7 +169,7 @@ pub fn read_lines(
                 should_break = true
             }
             snippet = String::from("");
-            comment = if line.len() > 2 { String::from(&line[2..]) } else { String::from("") };
+            comment = without_prefix(&line);
         }
         // variable
         else if line.starts_with('$') {

src/structures/cheat.rs

@@ -43,18 +43,25 @@ impl VariableMap {
 
     pub fn get_suggestion(&self, tags: &str, variable: &str) -> Option<&Suggestion> {
         let k = fnv(&tags);
-        let res = self.variables.get(&k)?.get(variable);
-        if res.is_some() {
-            return res;
+
+        if let Some(vm) = self.variables.get(&k) {
+            let res = vm.get(variable);
+            if res.is_some() {
+                return res;
+            }
         }
+
         if let Some(dependency_keys) = self.dependencies.get(&k) {
             for dependency_key in dependency_keys {
-                let res = self.variables.get(&dependency_key)?.get(variable);
-                if res.is_some() {
-                    return res;
+                if let Some(vm) = self.variables.get(&dependency_key) {
+                    let res = vm.get(variable);
+                    if res.is_some() {
+                        return res;
+                    }
                 }
             }
         }
+
         None
     }
 }

src/structures/config.rs

@@ -290,12 +290,12 @@ impl Config {
         }
     }
 
-    pub fn get_no_autoselect(&self) -> bool {
+    pub fn autoselect(&self) -> bool {
         if self.no_autoselect {
             deprecated("--no-autoselect");
-            true
-        } else {
             false
+        } else {
+            true
         }
     }
 }

src/tldr.rs

@@ -13,6 +13,9 @@ lazy_static! {
     pub static ref NON_VAR_CHARS_REGEX: Regex = Regex::new(r"[^\da-zA-Z_]").expect("Invalid regex");
 }
 
+static VERSION_DISCLAIMER: &str = "The tldr client written in C (the default one in Homebrew) doesn't support markdown files, so navi can't use it.
+The client written in Rust is recommended. The one available in npm works, too.";
+
 fn convert_tldr_vars(line: &str) -> String {
     let caps = VAR_TLDR_REGEX.find_iter(&line);
     let mut new_line: String = line.to_string();
@@ -87,7 +90,12 @@ pub fn fetch(query: &str) -> Result<String, Error> {
             eprintln!(
                 "navi was unable to call tldr.
 Make sure tldr is correctly installed.
-Refer to https://github.com/tldr-pages/tldr for more info."
+Refer to https://github.com/tldr-pages/tldr for more info.
+
+Note:
+{}
+",
+                VERSION_DISCLAIMER
             );
             process::exit(34)
         }
@@ -107,15 +115,15 @@ Output:
 Error:
 {}
 
-Note: 
-The tldr client written in C (the default one in Homebrew) doesn't support markdown files, so navi can't use it. 
-Please make sure you're using a version that supports the --markdown flag. 
-The client written in Rust is recommended. The one available in npm works, too.
-If you are already using a supported version you can ignore this message.
+Note:
+Please make sure you're using a version that supports the --markdown flag.
+If you are already using a supported version you can ignore this message. 
+{}
 ",
             args.join(" "),
             String::from_utf8(out.stdout).unwrap_or_else(|_e| "Unable to get output message".to_string()),
-            String::from_utf8(out.stderr).unwrap_or_else(|_e| "Unable to get error message".to_string())
+            String::from_utf8(out.stderr).unwrap_or_else(|_e| "Unable to get error message".to_string()),
+            VERSION_DISCLAIMER
         );
         process::exit(35)
     }

tests/run

@@ -109,7 +109,7 @@ _integration() {
 
    echoerr "Running snippet..."
    tmux send-key -t ci "pwd"
-   sleep 1  
+   sleep 1
    tmux send-key -t ci "Enter"
 
    sleep 2