feat: add 'my-languages' option to hx --health

`hx --health my-languages` has same output than `hx --health languages`,
but shows only languages corresponding to the 'use-grammars' config.

helix-loader/src/grammar.rs

@@ -213,6 +213,27 @@ fn get_grammar_configs() -> Result<Vec<GrammarConfiguration>> {
     Ok(grammars)
 }
 
+pub fn get_grammar_names() -> Result<Option<HashSet<String>>> {
+    let config: Configuration = crate::config::user_lang_config()
+        .context("Could not parse languages.toml")?
+        .try_into()?;
+
+    let grammars = match config.grammar_selection {
+        Some(GrammarSelection::Only { only: selections }) => Some(selections),
+        Some(GrammarSelection::Except { except: rejections }) => Some(
+            config
+                .grammar
+                .into_iter()
+                .map(|grammar| grammar.grammar_id)
+                .filter(|id| !rejections.contains(id))
+                .collect(),
+        ),
+        None => None,
+    };
+
+    Ok(grammars)
+}
+
 fn run_parallel<F, Res>(grammars: Vec<GrammarConfiguration>, job: F) -> Vec<(String, Result<Res>)>
 where
     F: Fn(GrammarConfiguration) -> Result<Res> + Send + 'static + Clone,

helix-term/src/health.rs

@@ -5,7 +5,7 @@ use crossterm::{
 };
 use helix_core::config::{default_lang_config, user_lang_config};
 use helix_loader::grammar::load_runtime_file;
-use std::io::Write;
+use std::{collections::HashSet, io::Write};
 
 #[derive(Copy, Clone)]
 pub enum TsFeature {
@@ -134,6 +134,15 @@ pub fn clipboard() -> std::io::Result<()> {
 }
 
 pub fn languages_all() -> std::io::Result<()> {
+    languages(None)
+}
+
+pub fn languages_selection() -> std::io::Result<()> {
+    let selection = helix_loader::grammar::get_grammar_names().unwrap_or_default();
+    languages(selection)
+}
+
+fn languages(selection: Option<HashSet<String>>) -> std::io::Result<()> {
     let stdout = std::io::stdout();
     let mut stdout = stdout.lock();
 
@@ -196,6 +205,13 @@ pub fn languages_all() -> std::io::Result<()> {
     let check_binary = |cmd: Option<&str>| check_binary_with_name(cmd.map(|cmd| (cmd, cmd)));
 
     for lang in &syn_loader_conf.language {
+        if selection
+            .as_ref()
+            .is_some_and(|s| !s.contains(&lang.language_id))
+        {
+            continue;
+        }
+
         write!(stdout, "{}", fit(&lang.language_id))?;
 
         let mut cmds = lang.language_servers.iter().filter_map(|ls| {
@@ -392,6 +408,7 @@ fn probe_treesitter_feature(lang: &str, feature: TsFeature) -> std::io::Result<(
 pub fn print_health(health_arg: Option<String>) -> std::io::Result<()> {
     match health_arg.as_deref() {
         Some("languages") => languages_all()?,
+        Some("my-languages") => languages_selection()?,
         Some("clipboard") => clipboard()?,
         None | Some("all") => {
             general()?;

helix-term/src/main.rs

@@ -63,8 +63,8 @@ FLAGS:
     -h, --help                     Prints help information
     --tutor                        Loads the tutorial
     --health [CATEGORY]            Checks for potential errors in editor setup
-                                   CATEGORY can be a language or one of 'clipboard', 'languages'
+                                   CATEGORY can be a language or one of 'clipboard', 'languages',
-                                   or 'all'. 'all' is the default if not specified.
+                                   'my-languages' or 'all'. 'all' is the default if not specified.
     -g, --grammar {{fetch|build}}    Fetches or builds tree-sitter grammars listed in languages.toml
     -c, --config <file>            Specifies a file to use for configuration
     -v                             Increases logging verbosity each use for up to 3 times