Repository: oxc-project/oxc
Pull request #10761: refactor(language_server): move functions related to `ServerLinter` to `ServerLinter`
Author: login: Sysix
Labels: name: C-cleanup
description: Category -  technical debt or refactoring. Solution not expected to change behavior
name: A-editor
description: Area - Editor and Language Server
Created: 2025-05-02T13:04:33Z | Merged: 2025-05-04T07:12:20Z



Diff:
diff --git a/crates/oxc_language_server/src/linter/server_linter.rs b/crates/oxc_language_server/src/linter/server_linter.rs
index ad28dfab3ce90..5f6d38b786fc6 100644
--- a/crates/oxc_language_server/src/linter/server_linter.rs
+++ b/crates/oxc_language_server/src/linter/server_linter.rs
@@ -1,13 +1,22 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
@@ -15,7 +24,162 @@ pub struct ServerLinter {
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+            else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
+        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+            .ignore(true)
+            .hidden(false)
+            .git_global(false)
+            .build()
+            .flatten();
+
+        let mut gitignore_globs = vec![];
+        for entry in walk {
+            let ignore_file_path = entry.path();
+            if !ignore_file_glob_set.is_match(ignore_file_path) {
+                continue;
+            }
+
+            if let Some(ignore_file_dir) = ignore_file_path.parent() {
+                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
+                builder.add(ignore_file_path);
+                if let Ok(gitignore) = builder.build() {
+                    gitignore_globs.push(gitignore);
+                }
+            }
+        }
+
+        if oxlintrc.ignore_patterns.is_empty() {
+            return gitignore_globs;
+        }
+
+        let Some(oxlintrc_dir) = oxlintrc.path.parent() else {
+            warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
+            return gitignore_globs;
+        };
+
+        let mut builder = ignore::gitignore::GitignoreBuilder::new(oxlintrc_dir);
+        for entry in &oxlintrc.ignore_patterns {
+            builder.add_line(None, entry).expect("Failed to add ignore line");
+        }
+        gitignore_globs.push(builder.build().unwrap());
+        gitignore_globs
+    }
+
+    pub fn create_server_linter(
+        root_uri: &Uri,
+        options: &Options,
+        nested_configs: &ConcurrentHashMap<PathBuf, ConfigStore>,
+    ) -> (Self, Oxlintrc) {
+        let root_path = root_uri.to_file_path().unwrap();
+        let relative_config_path = options.config_path.clone();
+        let oxlintrc = if relative_config_path.is_some() {
+            let config = root_path.join(relative_config_path.unwrap());
+            if config.try_exists().expect("Could not get fs metadata for config") {
+                if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
+                    oxlintrc
+                } else {
+                    warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
+                    Oxlintrc::default()
+                }
+            } else {
+                warn!(
+                    "Config file not found: {}, fallback to default config",
+                    config.to_string_lossy()
+                );
+                Oxlintrc::default()
+            }
+        } else {
+            Oxlintrc::default()
+        };
+
+        // clone because we are returning it for ignore builder
+        let config_builder =
+            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
+
+        // TODO(refactor): pull this into a shared function, because in oxlint we have the same functionality.
+        let use_nested_config = options.use_nested_configs();
+
+        let use_cross_module = if use_nested_config {
+            nested_configs.pin().values().any(|config| config.plugins().has_import())
+        } else {
+            config_builder.plugins().has_import()
+        };
+
+        let config_store = config_builder.build().expect("Failed to build config store");
+
+        let lint_options = LintOptions { fix: options.fix_kind(), ..Default::default() };
+
+        let linter = if use_nested_config {
+            let nested_configs = nested_configs.pin();
+            let nested_configs_copy: FxHashMap<PathBuf, ConfigStore> = nested_configs
+                .iter()
+                .map(|(key, value)| (key.clone(), value.clone()))
+                .collect::<FxHashMap<_, _>>();
+
+            Linter::new_with_nested_configs(lint_options, config_store, nested_configs_copy)
+        } else {
+            Linter::new(lint_options, config_store)
+        };
+
+        let server_linter = ServerLinter::new_with_linter(
+            linter,
+            IsolatedLintHandlerOptions { use_cross_module, root_path: root_path.to_path_buf() },
+        );
+
+        (server_linter, oxlintrc)
+    }
+
+    fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
         let isolated_linter = Arc::new(IsolatedLintHandler::new(linter, options));
 
         Self { isolated_linter }
@@ -28,7 +192,46 @@ impl ServerLinter {
 
 #[cfg(test)]
 mod test {
-    use crate::tester::Tester;
+    use std::{path::PathBuf, str::FromStr};
+
+    use rustc_hash::FxHashMap;
+    use tower_lsp_server::lsp_types::Uri;
+
+    use crate::{
+        Options,
+        linter::server_linter::ServerLinter,
+        tester::{Tester, get_file_uri},
+    };
+
+    #[test]
+    fn test_create_nested_configs_with_disabled_nested_configs() {
+        let mut flags = FxHashMap::default();
+        flags.insert("disable_nested_configs".to_string(), "true".to_string());
+
+        let configs = ServerLinter::create_nested_configs(
+            &Uri::from_str("file:///root/").unwrap(),
+            &Options { flags, ..Options::default() },
+        );
+
+        assert!(configs.is_empty());
+    }
+
+    #[test]
+    fn test_create_nested_configs() {
+        let configs = ServerLinter::create_nested_configs(
+            &get_file_uri("fixtures/linter/init_nested_configs"),
+            &Options::default(),
+        );
+        let configs = configs.pin();
+        let mut configs_dirs = configs.keys().collect::<Vec<&PathBuf>>();
+        // sorting the key because for consistent tests results
+        configs_dirs.sort();
+
+        assert!(configs_dirs.len() == 3);
+        assert!(configs_dirs[2].ends_with("deep2"));
+        assert!(configs_dirs[1].ends_with("deep1"));
+        assert!(configs_dirs[0].ends_with("init_nested_configs"));
+    }
 
     #[test]
     fn test_no_errors() {
diff --git a/crates/oxc_language_server/src/worker.rs b/crates/oxc_language_server/src/worker.rs
index 7d75154bac86b..f3552c108d139 100644
--- a/crates/oxc_language_server/src/worker.rs
+++ b/crates/oxc_language_server/src/worker.rs
@@ -1,14 +1,9 @@
-use std::{
-    path::{Path, PathBuf},
-    str::FromStr,
-    vec,
-};
+use std::{path::PathBuf, str::FromStr, vec};
 
-use globset::Glob;
 use ignore::gitignore::Gitignore;
-use log::{debug, info, warn};
-use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
-use rustc_hash::{FxBuildHasher, FxHashMap};
+use log::{debug, info};
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, Oxlintrc};
+use rustc_hash::FxBuildHasher;
 use tokio::sync::{Mutex, OnceCell, RwLock};
 use tower_lsp_server::{
     UriExt,
@@ -21,10 +16,7 @@ use crate::{
         apply_all_fix_code_action, apply_fix_code_action, ignore_this_line_code_action,
         ignore_this_rule_code_action,
     },
-    linter::{
-        config_walker::ConfigWalker, error_with_position::DiagnosticReport,
-        isolated_lint_handler::IsolatedLintHandlerOptions, server_linter::ServerLinter,
-    },
+    linter::{error_with_position::DiagnosticReport, server_linter::ServerLinter},
 };
 
 pub struct WorkspaceWorker {
@@ -41,16 +33,15 @@ impl WorkspaceWorker {
         let root_uri_cell = OnceCell::new();
         root_uri_cell.set(root_uri.clone()).unwrap();
 
-        let nested_configs = Self::init_nested_configs(root_uri, &options);
+        let nested_configs = ServerLinter::create_nested_configs(root_uri, &options);
         let (server_linter, oxlintrc) =
-            Self::init_linter_config(root_uri, &options, &nested_configs);
-
+            ServerLinter::create_server_linter(root_uri, &options, &nested_configs);
         Self {
             root_uri: root_uri_cell,
             server_linter: RwLock::new(server_linter),
             diagnostics_report_map: RwLock::new(ConcurrentHashMap::default()),
             options: Mutex::new(options),
-            gitignore_glob: Mutex::new(Self::init_ignore_glob(root_uri, &oxlintrc)),
+            gitignore_glob: Mutex::new(ServerLinter::create_ignore_glob(root_uri, &oxlintrc)),
             nested_configs: RwLock::const_new(nested_configs),
         }
     }
@@ -72,162 +63,26 @@ impl WorkspaceWorker {
         self.diagnostics_report_map.read().await.pin().remove(&uri.to_string());
     }
 
-    /// Searches inside root_uri recursively for the default oxlint config files
-    /// and insert them inside the nested configuration
-    fn init_nested_configs(
-        root_uri: &Uri,
-        options: &Options,
-    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
-        // nested config is disabled, no need to search for configs
-        if !options.use_nested_configs() {
-            return ConcurrentHashMap::default();
-        }
-
-        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
-
-        let paths = ConfigWalker::new(&root_path).paths();
-        let nested_configs =
-            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
-
-        for path in paths {
-            let file_path = Path::new(&path);
-            let Some(dir_path) = file_path.parent() else {
-                continue;
-            };
-
-            let oxlintrc = Oxlintrc::from_file(file_path).expect("Failed to parse config file");
-            let config_store_builder = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
-                .expect("Failed to create config store builder");
-            let config_store = config_store_builder.build().expect("Failed to build config store");
-            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
-        }
-
-        nested_configs
-    }
-
     async fn refresh_nested_configs(&self) {
         let options = self.options.lock().await;
-        let nested_configs = Self::init_nested_configs(self.root_uri.get().unwrap(), &options);
+        let nested_configs =
+            ServerLinter::create_nested_configs(self.root_uri.get().unwrap(), &options);
 
         *self.nested_configs.write().await = nested_configs;
     }
 
-    fn init_linter_config(
-        root_uri: &Uri,
-        options: &Options,
-        nested_configs: &ConcurrentHashMap<PathBuf, ConfigStore>,
-    ) -> (ServerLinter, Oxlintrc) {
-        let root_path = root_uri.to_file_path().unwrap();
-        let relative_config_path = options.config_path.clone();
-        let oxlintrc = if relative_config_path.is_some() {
-            let config = root_path.join(relative_config_path.unwrap());
-            if config.try_exists().expect("Could not get fs metadata for config") {
-                if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
-                    oxlintrc
-                } else {
-                    warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
-                    Oxlintrc::default()
-                }
-            } else {
-                warn!(
-                    "Config file not found: {}, fallback to default config",
-                    config.to_string_lossy()
-                );
-                Oxlintrc::default()
-            }
-        } else {
-            Oxlintrc::default()
-        };
-
-        // clone because we are returning it for ignore builder
-        let config_builder =
-            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
-
-        // TODO(refactor): pull this into a shared function, because in oxlint we have the same functionality.
-        let use_nested_config = options.use_nested_configs();
-
-        let use_cross_module = if use_nested_config {
-            nested_configs.pin().values().any(|config| config.plugins().has_import())
-        } else {
-            config_builder.plugins().has_import()
-        };
-
-        let config_store = config_builder.build().expect("Failed to build config store");
-
-        let lint_options = LintOptions { fix: options.fix_kind(), ..Default::default() };
-
-        let linter = if use_nested_config {
-            let nested_configs = nested_configs.pin();
-            let nested_configs_copy: FxHashMap<PathBuf, ConfigStore> = nested_configs
-                .iter()
-                .map(|(key, value)| (key.clone(), value.clone()))
-                .collect::<FxHashMap<_, _>>();
-
-            Linter::new_with_nested_configs(lint_options, config_store, nested_configs_copy)
-        } else {
-            Linter::new(lint_options, config_store)
-        };
-
-        let server_linter = ServerLinter::new_with_linter(
-            linter,
-            IsolatedLintHandlerOptions { use_cross_module, root_path: root_path.to_path_buf() },
-        );
-
-        (server_linter, oxlintrc)
-    }
-
     async fn refresh_linter_config(&self) {
         let options = self.options.lock().await;
         let nested_configs = self.nested_configs.read().await;
-        let (server_linter, _) =
-            Self::init_linter_config(self.root_uri.get().unwrap(), &options, &nested_configs);
+        let (server_linter, _) = ServerLinter::create_server_linter(
+            self.root_uri.get().unwrap(),
+            &options,
+            &nested_configs,
+        );
 
         *self.server_linter.write().await = server_linter;
     }
 
-    fn init_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
-        let mut builder = globset::GlobSetBuilder::new();
-        // Collecting all ignore files
-        builder.add(Glob::new("**/.eslintignore").unwrap());
-        builder.add(Glob::new("**/.gitignore").unwrap());
-
-        let ignore_file_glob_set = builder.build().unwrap();
-
-        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
-            .ignore(true)
-            .hidden(false)
-            .git_global(false)
-            .build()
-            .flatten();
-
-        let mut gitignore_globs = vec![];
-        for entry in walk {
-            let ignore_file_path = entry.path();
-            if !ignore_file_glob_set.is_match(ignore_file_path) {
-                continue;
-            }
-
-            if let Some(ignore_file_dir) = ignore_file_path.parent() {
-                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
-                builder.add(ignore_file_path);
-                if let Ok(gitignore) = builder.build() {
-                    gitignore_globs.push(gitignore);
-                }
-            }
-        }
-
-        if !oxlintrc.ignore_patterns.is_empty() {
-            let mut builder =
-                ignore::gitignore::GitignoreBuilder::new(oxlintrc.path.parent().unwrap());
-            for entry in &oxlintrc.ignore_patterns {
-                builder.add_line(None, entry).expect("Failed to add ignore line");
-            }
-            gitignore_globs.push(builder.build().unwrap());
-        }
-
-        gitignore_globs
-    }
-
     fn needs_linter_restart(old_options: &Options, new_options: &Options) -> bool {
         old_options.config_path != new_options.config_path
             || old_options.use_nested_configs() != new_options.use_nested_configs()
@@ -459,8 +314,6 @@ fn range_overlaps(a: Range, b: Range) -> bool {
 
 #[cfg(test)]
 mod tests {
-    use crate::tester::get_file_uri;
-
     use super::*;
 
     #[test]
@@ -489,34 +342,4 @@ mod tests {
                 .is_responsible_for_uri(&Uri::from_str("file:///path/to/other/file.js").unwrap())
         );
     }
-
-    #[test]
-    fn test_init_nested_configs_with_disabled_nested_configs() {
-        let mut flags = FxHashMap::default();
-        flags.insert("disable_nested_configs".to_string(), "true".to_string());
-
-        let configs = WorkspaceWorker::init_nested_configs(
-            &Uri::from_str("file:///root/").unwrap(),
-            &Options { flags, ..Options::default() },
-        );
-
-        assert!(configs.is_empty());
-    }
-
-    #[test]
-    fn test_init_nested_configs() {
-        let configs = WorkspaceWorker::init_nested_configs(
-            &get_file_uri("fixtures/linter/init_nested_configs"),
-            &Options::default(),
-        );
-        let configs = configs.pin();
-        let mut configs_dirs = configs.keys().collect::<Vec<&PathBuf>>();
-        // sorting the key because for consistent tests results
-        configs_dirs.sort();
-
-        assert!(configs_dirs.len() == 3);
-        assert!(configs_dirs[2].ends_with("deep2"));
-        assert!(configs_dirs[1].ends_with("deep1"));
-        assert!(configs_dirs[0].ends_with("init_nested_configs"));
-    }
 }


Reviews:
user: login: coderabbitai[bot]
body: **Actionable comments posted: 3**

<details>
<summary>🧹 Nitpick comments (2)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (1)</summary><blockquote>

`110-128`: **Gracefully fall back when a custom config path is invalid**  

Several chained `expect`/`unwrap` calls (e.g. `root_path.join(relative_config_path.unwrap())`, `config.try_exists().expect(...)`) can still panic if IO errors occur (e.g. permission denied, symlink loops). Consider replacing them with `match` + `warn!` so that the server linter continues with defaults instead of aborting.

</blockquote></details>
<details>
<summary>crates/oxc_language_server/src/worker.rs (1)</summary><blockquote>

`295-307`: **Minor optimisation: avoid locking per-file for ignore checks**

`is_ignored` acquires a `Mutex` for every file linted.  Because `gitignore_glob` is mutated only when configuration changes (an infrequent, serialised path), switching it to an `RwLock<Vec<Gitignore>>` lets the hot path use a non-blocking read lock:

```diff
-    gitignore_glob: Mutex<Vec<Gitignore>>,
+    gitignore_glob: RwLock<Vec<Gitignore>>,
...
-        let gitignore_globs = &(*self.gitignore_glob.lock().await);
+        let gitignore_globs = &(*self.gitignore_glob.read().await);
```

This reduces contention when multiple files are linted concurrently.

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 4b4b09e0e44b1e904870920b3dbd2c75398ed9fd and 1a95dc4357035e6b6b6e541817cd7f707d602c99.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `crates/oxc_language_server/src/linter/server_linter.rs` (2 hunks)
* `crates/oxc_language_server/src/worker.rs` (4 hunks)

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>crates/oxc_language_server/src/worker.rs (1)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (4)</summary>

* `nested_configs` (149-152)
* `create_nested_configs` (29-58)
* `create_server_linter` (103-165)
* `create_ignore_glob` (60-101)

</details>

</blockquote></details>

</details>

</details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: NONE
submitted_at: 2025-05-02T14:39:15Z
user: login: Sysix
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-05-03T09:40:29Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 2**

<details>
<summary>♻️ Duplicate comments (1)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (1)</summary><blockquote>

`50-62`: **Proper error handling implemented for config files**

This code now correctly handles errors from config file parsing instead of using `expect()` calls, which prevents the language server from crashing on invalid config files.

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (4)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (4)</summary><blockquote>

`147-147`: **Potential for error propagation**

This line unwraps the result of `ConfigStoreBuilder::from_oxlintrc` and falls back to default, but doesn't log any warning if the creation fails.


```diff
- let config_builder =
-     ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
+ let config_builder = match ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()) {
+     Ok(builder) => builder,
+     Err(err) => {
+         warn!("Failed to create config store builder: {}", err);
+         ConfigStoreBuilder::default()
+     }
+ };
```

---

`163-168`: **Consider avoiding the needless copy of nested configs**

This code copies the entire nested configs collection to create a new FxHashMap, which could be inefficient for large projects with many config files.


Consider refactoring the `Linter::new_with_nested_configs` API to accept a reference to the configs, or create a method that works directly with the ConcurrentHashMap to avoid the extra copy.

---

`219-234`: **Good test for nested config discovery**

This test validates the correct behavior of finding and loading multiple nested configs. However, it would be even better to include a test for error handling.


Consider adding a test case that includes an invalid config file to verify the error handling code works properly.

---

`149-149`: **TODO comment needs addressing**

There's a TODO comment about refactoring shared functionality. Consider creating an issue to track this technical debt or address it in a follow-up PR.

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 1a95dc4357035e6b6b6e541817cd7f707d602c99 and 66aea3064447873b6e3ba52c32db4df753e53ab7.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `crates/oxc_language_server/src/linter/server_linter.rs` (2 hunks)
* `crates/oxc_language_server/src/worker.rs` (4 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* crates/oxc_language_server/src/worker.rs

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (14)</summary>

* GitHub Check: Clippy
* GitHub Check: Benchmark (formatter)
* GitHub Check: Benchmark (codegen)
* GitHub Check: Benchmark (minifier)
* GitHub Check: Benchmark (semantic)
* GitHub Check: Benchmark (isolated_declarations)
* GitHub Check: Test wasm32-wasip1-threads
* GitHub Check: Benchmark (transformer)
* GitHub Check: Benchmark (parser)
* GitHub Check: Test (macos-latest)
* GitHub Check: Benchmark (lexer)
* GitHub Check: Test
* GitHub Check: Test (ubuntu-latest)
* GitHub Check: Build Linter Benchmark

</details>

<details>
<summary>🔇 Additional comments (5)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (5)</summary>

`1-18`: **Import organization looks good for the new functionality**

The imports are well organized and cover all the needed functionality for the new methods. The code imports standard library components, external crates, and internal modules in a logical manner.

---

`29-68`: **Good implementation of `create_nested_configs` with proper error handling**

This implementation properly handles potential errors during config loading, addressing previous concerns about panicking on malformed configs. The error handling logic now gracefully skips invalid configurations with appropriate warning logs.

---

`105-108`: **Good fix for potential panic when handling oxlintrc paths**

This properly handles the case where `oxlintrc.path` has no parent directory, addressing a previous review comment about potential panics with the default config.

---

`182-186`: **Good change to make constructor private**

Making `new_with_linter` private is appropriate since it's now only called internally by the public static method `create_server_linter`. This provides a more focused API for consumers.

---

`207-217`: **Good test case for disabled nested configs**

This test correctly verifies that when nested configs are disabled, an empty collection is returned. This helps ensure the feature flag works properly.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: NONE
submitted_at: 2025-05-03T09:42:34Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 4**

<details>
<summary>♻️ Duplicate comments (4)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (4)</summary><blockquote>

`112-113`: _⚠️ Potential issue_

**Convert `expect` to error handling in add_line**

There's a potential crash point in the code where `builder.add_line(None, entry)` uses `expect`. If adding an ignore line fails, this will crash the entire language server process.


```diff
-            builder.add_line(None, entry).expect("Failed to add ignore line");
+            if let Err(err) = builder.add_line(None, entry) {
+                warn!("Failed to add ignore line: {}: {}", entry, err);
+                continue;
+            }
```

---

`123-124`: _⚠️ Potential issue_

**Unwrap could panic when converting URI to file path**

The `to_file_path().unwrap()` call can panic if the URI cannot be converted to a file path, crashing the language server.


```diff
-        let root_path = root_uri.to_file_path().unwrap();
+        let root_path = match root_uri.to_file_path() {
+            Ok(path) => path,
+            Err(_) => {
+                warn!("Failed to convert URI to file path: {}", root_uri);
+                return (ServerLinter::new_with_linter(
+                    Linter::default(),
+                    IsolatedLintHandlerOptions {
+                        use_cross_module: false,
+                        root_path: PathBuf::new(),
+                    },
+                ), Oxlintrc::default());
+            }
+        };
```

---

`158-159`: _⚠️ Potential issue_

**Handle config store build errors gracefully**

Using `expect` when building the config store can crash the language server if there's an issue with the configuration.


```diff
-        let config_store = config_builder.build().expect("Failed to build config store");
+        let config_store = match config_builder.build() {
+            Ok(store) => store,
+            Err(err) => {
+                warn!("Failed to build config store: {}", err);
+                ConfigStoreBuilder::default().build().unwrap_or_default()
+            }
+        };
```

---

`127-134`: _⚠️ Potential issue_

**Replace expect with proper error handling for file existence check**

Using `expect` for checking if a file exists can crash the language server if there's an issue with file system access.


```diff
-            if config.try_exists().expect("Could not get fs metadata for config") {
+            if let Ok(exists) = config.try_exists() {
+                if exists {
+                    if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
+                        oxlintrc
+                    } else {
+                        warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
+                        Oxlintrc::default()
+                    }
+                } else {
+                    warn!(
+                        "Config file not found: {}, fallback to default config",
+                        config.to_string_lossy()
+                    );
+                    Oxlintrc::default()
+                }
+            } else {
+                warn!("Could not get fs metadata for config: {}", config.to_string_lossy());
+                Oxlintrc::default()
+            }
```

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (1)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (1)</summary><blockquote>

`147-147`: **Handle unwrap_or_default potential error**

While `unwrap_or_default()` won't panic, it silently falls back to a default. Consider logging a warning when this happens for better debuggability.


```diff
-        let config_builder =
-            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
+        let config_builder = match ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()) {
+            Ok(builder) => builder,
+            Err(err) => {
+                warn!("Failed to create config builder from oxlintrc: {}", err);
+                ConfigStoreBuilder::default()
+            }
+        };
```

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 623bc4532615dc3d49282e21ba1f6b756784318f and 3d794f683f86fa83c77a73d1508407b1da0551c1.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `crates/oxc_language_server/src/linter/server_linter.rs` (2 hunks)
* `crates/oxc_language_server/src/worker.rs` (4 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* crates/oxc_language_server/src/worker.rs

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (7)</summary><blockquote>

<details>
<summary>crates/oxc_linter/src/lib.rs (3)</summary>

* `options` (106-108)
* `new` (80-82)
* `new_with_nested_configs` (85-91)

</details>
<details>
<summary>crates/oxc_linter/src/config/config_builder.rs (3)</summary>

* `default` (31-33)
* `new` (430-432)
* `from_oxlintrc` (87-187)

</details>
<details>
<summary>crates/oxc_language_server/src/linter/config_walker.rs (2)</summary>

* `paths` (83-89)
* `new` (66-81)

</details>
<details>
<summary>crates/oxc_language_server/src/worker.rs (1)</summary>

* `new` (32-47)

</details>
<details>
<summary>crates/oxc_language_server/src/tester.rs (2)</summary>

* `new` (95-97)
* `get_file_uri` (13-17)

</details>
<details>
<summary>crates/oxc_language_server/src/linter/isolated_lint_handler.rs (1)</summary>

* `new` (37-39)

</details>
<details>
<summary>crates/oxc_linter/src/config/oxlintrc.rs (1)</summary>

* `from_file` (111-143)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (13)</summary>

* GitHub Check: Benchmark (formatter)
* GitHub Check: Benchmark (codegen)
* GitHub Check: Benchmark (minifier)
* GitHub Check: Test wasm32-wasip1-threads
* GitHub Check: Benchmark (semantic)
* GitHub Check: Benchmark (isolated_declarations)
* GitHub Check: Clippy
* GitHub Check: Benchmark (transformer)
* GitHub Check: Test Linux
* GitHub Check: Benchmark (parser)
* GitHub Check: Benchmark (lexer)
* GitHub Check: Build Linter Benchmark
* GitHub Check: Test

</details>

<details>
<summary>🔇 Additional comments (5)</summary><blockquote>

<details>
<summary>crates/oxc_language_server/src/linter/server_linter.rs (5)</summary>

`29-68`: **LGTM! Improved resilience compared to previous implementation**

The new `create_nested_configs` method includes proper error handling for config file parsing and building, appropriately logging warnings and continuing with execution rather than crashing the language server. This is a significant improvement over the previous implementation, which used `expect` calls that could potentially terminate the process.

---

`105-108`: **LGTM! Improved handling of parent path**

This code now properly handles the case where `oxlintrc.path` has no parent, which addresses a previous issue where the language server could crash when using the default config. This is a good improvement.

---

`182-186`: **LGTM! Appropriate encapsulation**

Making the `new_with_linter` method private is a good design choice, as it encourages using the more comprehensive `create_server_linter` static method, which handles all the necessary setup logic.

---

`206-217`: **LGTM! Good test coverage for disabled nested configs**

This test properly verifies that when nested configs are disabled, the `create_nested_configs` method returns an empty map without attempting to search for config files.

---

`219-234`: **LGTM! Good test coverage for nested configs**

This test verifies that the `create_nested_configs` method correctly finds and processes config files in a nested directory structure. The sorting of results ensures consistent test results.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: NONE
submitted_at: 2025-05-04T07:13:20Z

Review comments:
diff_hunk: @@ -1,21 +1,170 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let oxlintrc = Oxlintrc::from_file(file_path).expect("Failed to parse config file");
+            let config_store_builder = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+                .expect("Failed to create config store builder");
+            let config_store = config_store_builder.build().expect("Failed to build config store");
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Avoid panicking on malformed/unsupported `.oxlintrc` files**  

`expect` will terminate the language-server process whenever a single nested config is unreadable or syntactically wrong, taking the whole IDE extension down.  Gracefully skip (or surface) the error instead.

```diff
-            let oxlintrc = Oxlintrc::from_file(file_path).expect("Failed to parse config file");
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
-            let config_store_builder = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
-                .expect("Failed to create config store builder");
-            let config_store = config_store_builder.build().expect("Failed to build config store");
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc) else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (build failed): {}", file_path.display());
+                continue;
+            };
```

This prevents a single corrupt config from crashing every editor connected to the language server.  



<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
                warn!("Skipping invalid config file: {}", file_path.display());
                continue;
            };
            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc) else {
                warn!("Skipping config (builder failed): {}", file_path.display());
                continue;
            };
            let Ok(config_store) = config_store_builder.build() else {
                warn!("Skipping config (build failed): {}", file_path.display());
                continue;
            };
            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs around lines 50 to 55, the code uses expect calls that cause the language server to panic and terminate if a nested .oxlintrc config file is malformed or unsupported. To fix this, replace the expect calls with error handling that gracefully skips the problematic config or surfaces the error without panicking, ensuring the language server continues running even if a single config file is unreadable or syntactically incorrect.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->

✅ Addressed in commits 477ce48 to 66aea30
created_at: 2025-05-02T14:39:13Z
author_association: NONE
diff_hunk: @@ -1,21 +1,170 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let oxlintrc = Oxlintrc::from_file(file_path).expect("Failed to parse config file");
+            let config_store_builder = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+                .expect("Failed to create config store builder");
+            let config_store = config_store_builder.build().expect("Failed to build config store");
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
+        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+            .ignore(true)
+            .hidden(false)
+            .git_global(false)
+            .build()
+            .flatten();
+
+        let mut gitignore_globs = vec![];
+        for entry in walk {
+            let ignore_file_path = entry.path();
+            if !ignore_file_glob_set.is_match(ignore_file_path) {
+                continue;
+            }
+
+            if let Some(ignore_file_dir) = ignore_file_path.parent() {
+                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
+                builder.add(ignore_file_path);
+                if let Ok(gitignore) = builder.build() {
+                    gitignore_globs.push(gitignore);
+                }
+            }
+        }
+
+        if !oxlintrc.ignore_patterns.is_empty() {
+            let mut builder =
+                ignore::gitignore::GitignoreBuilder::new(oxlintrc.path.parent().unwrap());
+            for entry in &oxlintrc.ignore_patterns {
+                builder.add_line(None, entry).expect("Failed to add ignore line");
+            }
+            gitignore_globs.push(builder.build().unwrap());
+        }
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**`oxlintrc.path.parent().unwrap()` may panic when using the default config**  

`Oxlintrc::default()` sets `path` to an empty `PathBuf`; calling `.parent().unwrap()` on that will unwrap `None` and bring the server down when the workspace contains ignore patterns but no config file.

```diff
-        let mut builder =
-            ignore::gitignore::GitignoreBuilder::new(oxlintrc.path.parent().unwrap());
+        let ox_parent = match oxlintrc.path.parent() {
+            Some(parent) => parent,
+            None => {
+                warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
+                return gitignore_globs;
+            }
+        };
+        let mut builder = ignore::gitignore::GitignoreBuilder::new(ox_parent);
```

Fail-safe handling keeps the language server alive for projects that rely on the implicit defaults.  



<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
        if !oxlintrc.ignore_patterns.is_empty() {
            let ox_parent = match oxlintrc.path.parent() {
                Some(parent) => parent,
                None => {
                    warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
                    return gitignore_globs;
                }
            };
            let mut builder = ignore::gitignore::GitignoreBuilder::new(ox_parent);
            for entry in &oxlintrc.ignore_patterns {
                builder.add_line(None, entry).expect("Failed to add ignore line");
            }
            gitignore_globs.push(builder.build().unwrap());
        }
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs around lines 91 to 98, the code calls oxlintrc.path.parent().unwrap(), which can panic if oxlintrc.path is empty as in the default config. To fix this, add a check to safely handle the case when parent() returns None by providing a fallback directory (such as the current directory) before creating the GitignoreBuilder. This prevents panics and keeps the server running when using default configs with ignore patterns.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->

✅ Addressed in commits 477ce48 to 66aea30
created_at: 2025-05-02T14:39:14Z
author_association: NONE
diff_hunk: @@ -72,162 +63,26 @@ impl WorkspaceWorker {
         self.diagnostics_report_map.read().await.pin().remove(&uri.to_string());
     }
 
-    /// Searches inside root_uri recursively for the default oxlint config files
-    /// and insert them inside the nested configuration
-    fn init_nested_configs(
-        root_uri: &Uri,
-        options: &Options,
-    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
-        // nested config is disabled, no need to search for configs
-        if !options.use_nested_configs() {
-            return ConcurrentHashMap::default();
-        }
-
-        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
-
-        let paths = ConfigWalker::new(&root_path).paths();
-        let nested_configs =
-            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
-
-        for path in paths {
-            let file_path = Path::new(&path);
-            let Some(dir_path) = file_path.parent() else {
-                continue;
-            };
-
-            let oxlintrc = Oxlintrc::from_file(file_path).expect("Failed to parse config file");
-            let config_store_builder = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
-                .expect("Failed to create config store builder");
-            let config_store = config_store_builder.build().expect("Failed to build config store");
-            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
-        }
-
-        nested_configs
-    }
-
     async fn refresh_nested_configs(&self) {
         let options = self.options.lock().await;
-        let nested_configs = Self::init_nested_configs(self.root_uri.get().unwrap(), &options);
+        let nested_configs =
+            ServerLinter::create_nested_configs(self.root_uri.get().unwrap(), &options);
 
         *self.nested_configs.write().await = nested_configs;
     }
 
-    fn init_linter_config(
-        root_uri: &Uri,
-        options: &Options,
-        nested_configs: &ConcurrentHashMap<PathBuf, ConfigStore>,
-    ) -> (ServerLinter, Oxlintrc) {
-        let root_path = root_uri.to_file_path().unwrap();
-        let relative_config_path = options.config_path.clone();
-        let oxlintrc = if relative_config_path.is_some() {
-            let config = root_path.join(relative_config_path.unwrap());
-            if config.try_exists().expect("Could not get fs metadata for config") {
-                if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
-                    oxlintrc
-                } else {
-                    warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
-                    Oxlintrc::default()
-                }
-            } else {
-                warn!(
-                    "Config file not found: {}, fallback to default config",
-                    config.to_string_lossy()
-                );
-                Oxlintrc::default()
-            }
-        } else {
-            Oxlintrc::default()
-        };
-
-        // clone because we are returning it for ignore builder
-        let config_builder =
-            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
-
-        // TODO(refactor): pull this into a shared function, because in oxlint we have the same functionality.
-        let use_nested_config = options.use_nested_configs();
-
-        let use_cross_module = if use_nested_config {
-            nested_configs.pin().values().any(|config| config.plugins().has_import())
-        } else {
-            config_builder.plugins().has_import()
-        };
-
-        let config_store = config_builder.build().expect("Failed to build config store");
-
-        let lint_options = LintOptions { fix: options.fix_kind(), ..Default::default() };
-
-        let linter = if use_nested_config {
-            let nested_configs = nested_configs.pin();
-            let nested_configs_copy: FxHashMap<PathBuf, ConfigStore> = nested_configs
-                .iter()
-                .map(|(key, value)| (key.clone(), value.clone()))
-                .collect::<FxHashMap<_, _>>();
-
-            Linter::new_with_nested_configs(lint_options, config_store, nested_configs_copy)
-        } else {
-            Linter::new(lint_options, config_store)
-        };
-
-        let server_linter = ServerLinter::new_with_linter(
-            linter,
-            IsolatedLintHandlerOptions { use_cross_module, root_path: root_path.to_path_buf() },
-        );
-
-        (server_linter, oxlintrc)
-    }
-
     async fn refresh_linter_config(&self) {
         let options = self.options.lock().await;
         let nested_configs = self.nested_configs.read().await;
-        let (server_linter, _) =
-            Self::init_linter_config(self.root_uri.get().unwrap(), &options, &nested_configs);
+        let (server_linter, _) = ServerLinter::create_server_linter(
+            self.root_uri.get().unwrap(),
+            &options,
+            &nested_configs,
+        );
 
         *self.server_linter.write().await = server_linter;
     }
path: crates/oxc_language_server/src/worker.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**`gitignore_glob` is not refreshed after the linter configuration changes**

When the user edits `oxlintrc` (e.g. adds `ignorePatterns`) or toggles `use_nested_configs`, `refresh_linter_config` rebuilds the `ServerLinter` but leaves the cached `gitignore_glob` untouched, so newly added ignore rules are silently ignored until the workspace is reloaded.

```diff
-        let (server_linter, _) = ServerLinter::create_server_linter(
+        let (server_linter, oxlintrc) = ServerLinter::create_server_linter(
             self.root_uri.get().unwrap(),
             &options,
             &nested_configs,
         );
 
         *self.server_linter.write().await = server_linter;
+        // Re-generate ignore globs to honour the new configuration.
+        *self.gitignore_glob.lock().await =
+            ServerLinter::create_ignore_glob(self.root_uri.get().unwrap(), &oxlintrc);
```

Without this, users may be puzzled why their newly configured ignore patterns have no effect.  



<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
    async fn refresh_linter_config(&self) {
        let options = self.options.lock().await;
        let nested_configs = self.nested_configs.read().await;
        let (server_linter, oxlintrc) = ServerLinter::create_server_linter(
            self.root_uri.get().unwrap(),
            &options,
            &nested_configs,
        );

        *self.server_linter.write().await = server_linter;
        // Re-generate ignore globs to honour the new configuration.
        *self.gitignore_glob.lock().await =
            ServerLinter::create_ignore_glob(self.root_uri.get().unwrap(), &oxlintrc);
    }
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/worker.rs around lines 74 to 84, after rebuilding the ServerLinter in refresh_linter_config, also update the cached gitignore_glob to reflect any changes in ignore patterns. This ensures that when the linter configuration changes, the gitignore_glob is refreshed accordingly, preventing stale ignore rules from being used. Modify the function to refresh or recreate gitignore_glob alongside the ServerLinter update.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-02T14:39:14Z
author_association: NONE
diff_hunk: @@ -72,162 +63,26 @@ impl WorkspaceWorker {
         self.diagnostics_report_map.read().await.pin().remove(&uri.to_string());
     }
 
-    /// Searches inside root_uri recursively for the default oxlint config files
-    /// and insert them inside the nested configuration
-    fn init_nested_configs(
-        root_uri: &Uri,
-        options: &Options,
-    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
-        // nested config is disabled, no need to search for configs
-        if !options.use_nested_configs() {
-            return ConcurrentHashMap::default();
-        }
-
-        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
-
-        let paths = ConfigWalker::new(&root_path).paths();
-        let nested_configs =
-            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
-
-        for path in paths {
-            let file_path = Path::new(&path);
-            let Some(dir_path) = file_path.parent() else {
-                continue;
-            };
-
-            let oxlintrc = Oxlintrc::from_file(file_path).expect("Failed to parse config file");
-            let config_store_builder = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
-                .expect("Failed to create config store builder");
-            let config_store = config_store_builder.build().expect("Failed to build config store");
-            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
-        }
-
-        nested_configs
-    }
-
     async fn refresh_nested_configs(&self) {
         let options = self.options.lock().await;
-        let nested_configs = Self::init_nested_configs(self.root_uri.get().unwrap(), &options);
+        let nested_configs =
+            ServerLinter::create_nested_configs(self.root_uri.get().unwrap(), &options);
 
         *self.nested_configs.write().await = nested_configs;
     }
 
-    fn init_linter_config(
-        root_uri: &Uri,
-        options: &Options,
-        nested_configs: &ConcurrentHashMap<PathBuf, ConfigStore>,
-    ) -> (ServerLinter, Oxlintrc) {
-        let root_path = root_uri.to_file_path().unwrap();
-        let relative_config_path = options.config_path.clone();
-        let oxlintrc = if relative_config_path.is_some() {
-            let config = root_path.join(relative_config_path.unwrap());
-            if config.try_exists().expect("Could not get fs metadata for config") {
-                if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
-                    oxlintrc
-                } else {
-                    warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
-                    Oxlintrc::default()
-                }
-            } else {
-                warn!(
-                    "Config file not found: {}, fallback to default config",
-                    config.to_string_lossy()
-                );
-                Oxlintrc::default()
-            }
-        } else {
-            Oxlintrc::default()
-        };
-
-        // clone because we are returning it for ignore builder
-        let config_builder =
-            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
-
-        // TODO(refactor): pull this into a shared function, because in oxlint we have the same functionality.
-        let use_nested_config = options.use_nested_configs();
-
-        let use_cross_module = if use_nested_config {
-            nested_configs.pin().values().any(|config| config.plugins().has_import())
-        } else {
-            config_builder.plugins().has_import()
-        };
-
-        let config_store = config_builder.build().expect("Failed to build config store");
-
-        let lint_options = LintOptions { fix: options.fix_kind(), ..Default::default() };
-
-        let linter = if use_nested_config {
-            let nested_configs = nested_configs.pin();
-            let nested_configs_copy: FxHashMap<PathBuf, ConfigStore> = nested_configs
-                .iter()
-                .map(|(key, value)| (key.clone(), value.clone()))
-                .collect::<FxHashMap<_, _>>();
-
-            Linter::new_with_nested_configs(lint_options, config_store, nested_configs_copy)
-        } else {
-            Linter::new(lint_options, config_store)
-        };
-
-        let server_linter = ServerLinter::new_with_linter(
-            linter,
-            IsolatedLintHandlerOptions { use_cross_module, root_path: root_path.to_path_buf() },
-        );
-
-        (server_linter, oxlintrc)
-    }
-
     async fn refresh_linter_config(&self) {
         let options = self.options.lock().await;
         let nested_configs = self.nested_configs.read().await;
-        let (server_linter, _) =
-            Self::init_linter_config(self.root_uri.get().unwrap(), &options, &nested_configs);
+        let (server_linter, _) = ServerLinter::create_server_linter(
+            self.root_uri.get().unwrap(),
+            &options,
+            &nested_configs,
+        );
 
         *self.server_linter.write().await = server_linter;
     }
path: crates/oxc_language_server/src/worker.rs
user: login: Sysix
body: Will be done when moving the gitignore_glob
created_at: 2025-05-03T09:40:29Z
author_association: MEMBER
diff_hunk: @@ -1,21 +1,185 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+            else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
+        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+            .ignore(true)
+            .hidden(false)
+            .git_global(false)
+            .build()
+            .flatten();
+
+        let mut gitignore_globs = vec![];
+        for entry in walk {
+            let ignore_file_path = entry.path();
+            if !ignore_file_glob_set.is_match(ignore_file_path) {
+                continue;
+            }
+
+            if let Some(ignore_file_dir) = ignore_file_path.parent() {
+                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
+                builder.add(ignore_file_path);
+                if let Ok(gitignore) = builder.build() {
+                    gitignore_globs.push(gitignore);
+                }
+            }
+        }
+
+        if oxlintrc.ignore_patterns.is_empty() {
+            return gitignore_globs;
+        }
+
+        let Some(oxlintrc_dir) = oxlintrc.path.parent() else {
+            warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
+            return gitignore_globs;
+        };
+
+        let mut builder = ignore::gitignore::GitignoreBuilder::new(oxlintrc_dir);
+        for entry in &oxlintrc.ignore_patterns {
+            builder.add_line(None, entry).expect("Failed to add ignore line");
+        }
+        gitignore_globs.push(builder.build().unwrap());
+        gitignore_globs
+    }
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Potential crash point in gitignore building**

While the method generally handles errors well, there's still an `expect` call on line 113 that could crash the server.


```diff
-            builder.add_line(None, entry).expect("Failed to add ignore line");
+            if let Err(err) = builder.add_line(None, entry) {
+                warn!("Failed to add ignore line: {}: {}", entry, err);
+                continue;
+            }
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
        let mut builder = globset::GlobSetBuilder::new();
        // Collecting all ignore files
        builder.add(Glob::new("**/.eslintignore").unwrap());
        builder.add(Glob::new("**/.gitignore").unwrap());

        let ignore_file_glob_set = builder.build().unwrap();

        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
            .ignore(true)
            .hidden(false)
            .git_global(false)
            .build()
            .flatten();

        let mut gitignore_globs = vec![];
        for entry in walk {
            let ignore_file_path = entry.path();
            if !ignore_file_glob_set.is_match(ignore_file_path) {
                continue;
            }

            if let Some(ignore_file_dir) = ignore_file_path.parent() {
                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
                builder.add(ignore_file_path);
                if let Ok(gitignore) = builder.build() {
                    gitignore_globs.push(gitignore);
                }
            }
        }

        if oxlintrc.ignore_patterns.is_empty() {
            return gitignore_globs;
        }

        let Some(oxlintrc_dir) = oxlintrc.path.parent() else {
            warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
            return gitignore_globs;
        };

        let mut builder = ignore::gitignore::GitignoreBuilder::new(oxlintrc_dir);
        for entry in &oxlintrc.ignore_patterns {
            if let Err(err) = builder.add_line(None, entry) {
                warn!("Failed to add ignore line: {}: {}", entry, err);
                continue;
            }
        }
        gitignore_globs.push(builder.build().unwrap());
        gitignore_globs
    }
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs between lines 70 and 116, the use of expect on line 113 when adding ignore patterns can cause a crash if adding a line fails. Replace the expect call with proper error handling by checking the result of builder.add_line and handling errors gracefully, such as logging a warning and continuing, to prevent the server from crashing.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-03T09:42:33Z
author_association: NONE
diff_hunk: @@ -1,21 +1,185 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+            else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
+        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+            .ignore(true)
+            .hidden(false)
+            .git_global(false)
+            .build()
+            .flatten();
+
+        let mut gitignore_globs = vec![];
+        for entry in walk {
+            let ignore_file_path = entry.path();
+            if !ignore_file_glob_set.is_match(ignore_file_path) {
+                continue;
+            }
+
+            if let Some(ignore_file_dir) = ignore_file_path.parent() {
+                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
+                builder.add(ignore_file_path);
+                if let Ok(gitignore) = builder.build() {
+                    gitignore_globs.push(gitignore);
+                }
+            }
+        }
+
+        if oxlintrc.ignore_patterns.is_empty() {
+            return gitignore_globs;
+        }
+
+        let Some(oxlintrc_dir) = oxlintrc.path.parent() else {
+            warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
+            return gitignore_globs;
+        };
+
+        let mut builder = ignore::gitignore::GitignoreBuilder::new(oxlintrc_dir);
+        for entry in &oxlintrc.ignore_patterns {
+            builder.add_line(None, entry).expect("Failed to add ignore line");
+        }
+        gitignore_globs.push(builder.build().unwrap());
+        gitignore_globs
+    }
+
+    pub fn create_server_linter(
+        root_uri: &Uri,
+        options: &Options,
+        nested_configs: &ConcurrentHashMap<PathBuf, ConfigStore>,
+    ) -> (Self, Oxlintrc) {
+        let root_path = root_uri.to_file_path().unwrap();
+        let relative_config_path = options.config_path.clone();
+        let oxlintrc = if relative_config_path.is_some() {
+            let config = root_path.join(relative_config_path.unwrap());
+            if config.try_exists().expect("Could not get fs metadata for config") {
+                if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
+                    oxlintrc
+                } else {
+                    warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
+                    Oxlintrc::default()
+                }
+            } else {
+                warn!(
+                    "Config file not found: {}, fallback to default config",
+                    config.to_string_lossy()
+                );
+                Oxlintrc::default()
+            }
+        } else {
+            Oxlintrc::default()
+        };
+
+        // clone because we are returning it for ignore builder
+        let config_builder =
+            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();
+
+        // TODO(refactor): pull this into a shared function, because in oxlint we have the same functionality.
+        let use_nested_config = options.use_nested_configs();
+
+        let use_cross_module = if use_nested_config {
+            nested_configs.pin().values().any(|config| config.plugins().has_import())
+        } else {
+            config_builder.plugins().has_import()
+        };
+
+        let config_store = config_builder.build().expect("Failed to build config store");
+
+        let lint_options = LintOptions { fix: options.fix_kind(), ..Default::default() };
+
+        let linter = if use_nested_config {
+            let nested_configs = nested_configs.pin();
+            let nested_configs_copy: FxHashMap<PathBuf, ConfigStore> = nested_configs
+                .iter()
+                .map(|(key, value)| (key.clone(), value.clone()))
+                .collect::<FxHashMap<_, _>>();
+
+            Linter::new_with_nested_configs(lint_options, config_store, nested_configs_copy)
+        } else {
+            Linter::new(lint_options, config_store)
+        };
+
+        let server_linter = ServerLinter::new_with_linter(
+            linter,
+            IsolatedLintHandlerOptions { use_cross_module, root_path: root_path.to_path_buf() },
+        );
+
+        (server_linter, oxlintrc)
+    }
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Several potential crash points in `create_server_linter`**

This method contains multiple `unwrap()` and `expect()` calls that can cause the language server to crash:

1. Line 123: `root_uri.to_file_path().unwrap()`
2. Line 127: `.try_exists().expect("Could not get fs metadata for config")`
3. Line 158: `.build().expect("Failed to build config store")`

These should be handled more gracefully with proper error messages.


```diff
- let root_path = root_uri.to_file_path().unwrap();
+ let root_path = match root_uri.to_file_path() {
+     Ok(path) => path,
+     Err(_) => {
+         warn!("Failed to convert URI to file path: {}", root_uri);
+         return (ServerLinter::new_with_linter(
+             Linter::default(),
+             IsolatedLintHandlerOptions {
+                 use_cross_module: false,
+                 root_path: PathBuf::new(),
+             },
+         ), Oxlintrc::default());
+     }
+ };
```

Similar error handling should be applied to the other potential crash points.


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
    pub fn create_server_linter(
        root_uri: &Uri,
        options: &Options,
        nested_configs: &ConcurrentHashMap<PathBuf, ConfigStore>,
    ) -> (Self, Oxlintrc) {
        let root_path = match root_uri.to_file_path() {
            Ok(path) => path,
            Err(_) => {
                warn!("Failed to convert URI to file path: {}", root_uri);
                return (
                    ServerLinter::new_with_linter(
                        Linter::default(),
                        IsolatedLintHandlerOptions {
                            use_cross_module: false,
                            root_path: PathBuf::new(),
                        },
                    ),
                    Oxlintrc::default(),
                );
            }
        };
        let relative_config_path = options.config_path.clone();
        let oxlintrc = if relative_config_path.is_some() {
            let config = root_path.join(relative_config_path.unwrap());
            if config.try_exists().expect("Could not get fs metadata for config") {
                if let Ok(oxlintrc) = Oxlintrc::from_file(&config) {
                    oxlintrc
                } else {
                    warn!("Failed to initialize oxlintrc config: {}", config.to_string_lossy());
                    Oxlintrc::default()
                }
            } else {
                warn!(
                    "Config file not found: {}, fallback to default config",
                    config.to_string_lossy()
                );
                Oxlintrc::default()
            }
        } else {
            Oxlintrc::default()
        };

        // clone because we are returning it for ignore builder
        let config_builder =
            ConfigStoreBuilder::from_oxlintrc(false, oxlintrc.clone()).unwrap_or_default();

        // TODO(refactor): pull this into a shared function, because in oxlint we have the same functionality.
        let use_nested_config = options.use_nested_configs();

        let use_cross_module = if use_nested_config {
            nested_configs.pin().values().any(|config| config.plugins().has_import())
        } else {
            config_builder.plugins().has_import()
        };

        let config_store = config_builder.build().expect("Failed to build config store");

        let lint_options = LintOptions { fix: options.fix_kind(), ..Default::default() };

        let linter = if use_nested_config {
            let nested_configs = nested_configs.pin();
            let nested_configs_copy: FxHashMap<PathBuf, ConfigStore> = nested_configs
                .iter()
                .map(|(key, value)| (key.clone(), value.clone()))
                .collect::<FxHashMap<_, _>>();

            Linter::new_with_nested_configs(lint_options, config_store, nested_configs_copy)
        } else {
            Linter::new(lint_options, config_store)
        };

        let server_linter = ServerLinter::new_with_linter(
            linter,
            IsolatedLintHandlerOptions { use_cross_module, root_path: root_path.to_path_buf() },
        );

        (server_linter, oxlintrc)
    }
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs between lines 118 and 180, the create_server_linter function uses unwrap() and expect() calls on root_uri.to_file_path(), try_exists(), and config_builder.build() which can cause panics. Replace these unwrap() and expect() calls with proper error handling by returning a Result or using match statements to handle errors gracefully. Log meaningful error messages when these operations fail and provide fallback behavior or propagate errors instead of panicking.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-03T09:42:33Z
author_association: NONE
diff_hunk: @@ -1,21 +1,185 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Handle URI to file path conversion error in create_nested_configs**

Similar to other places, the URI to file path conversion uses `expect`, which could crash the language server.


```diff
-        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+        let root_path = match root_uri.to_file_path() {
+            Ok(path) => path,
+            Err(_) => {
+                warn!("Failed to convert URI to file path in create_nested_configs: {}", root_uri);
+                return ConcurrentHashMap::default();
+            }
+        };
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
        let root_path = match root_uri.to_file_path() {
            Ok(path) => path,
            Err(_) => {
                warn!("Failed to convert URI to file path in create_nested_configs: {}", root_uri);
                return ConcurrentHashMap::default();
            }
        };
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs around lines 38 to 39, the conversion from URI to file path uses expect, which can cause the language server to crash on failure. Replace the expect call with proper error handling by returning a Result or handling the error gracefully to avoid panics and improve stability.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-04T07:13:19Z
author_association: NONE
diff_hunk: @@ -1,21 +1,185 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+            else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
+        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+            .ignore(true)
+            .hidden(false)
+            .git_global(false)
+            .build()
+            .flatten();
+
+        let mut gitignore_globs = vec![];
+        for entry in walk {
+            let ignore_file_path = entry.path();
+            if !ignore_file_glob_set.is_match(ignore_file_path) {
+                continue;
+            }
+
+            if let Some(ignore_file_dir) = ignore_file_path.parent() {
+                let mut builder = ignore::gitignore::GitignoreBuilder::new(ignore_file_dir);
+                builder.add(ignore_file_path);
+                if let Ok(gitignore) = builder.build() {
+                    gitignore_globs.push(gitignore);
+                }
+            }
+        }
+
+        if oxlintrc.ignore_patterns.is_empty() {
+            return gitignore_globs;
+        }
+
+        let Some(oxlintrc_dir) = oxlintrc.path.parent() else {
+            warn!("Oxlintrc path has no parent, skipping inline ignore patterns");
+            return gitignore_globs;
+        };
+
+        let mut builder = ignore::gitignore::GitignoreBuilder::new(oxlintrc_dir);
+        for entry in &oxlintrc.ignore_patterns {
+            builder.add_line(None, entry).expect("Failed to add ignore line");
+        }
+        gitignore_globs.push(builder.build().unwrap());
+        gitignore_globs
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Handle unwrap in gitignore build**

The `builder.build().unwrap()` call can panic if building the gitignore fails.


```diff
-        gitignore_globs.push(builder.build().unwrap());
+        if let Ok(gitignore) = builder.build() {
+            gitignore_globs.push(gitignore);
+        } else {
+            warn!("Failed to build gitignore from oxlintrc patterns");
+        }
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
        if let Ok(gitignore) = builder.build() {
            gitignore_globs.push(gitignore);
        } else {
            warn!("Failed to build gitignore from oxlintrc patterns");
        }
        gitignore_globs
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs around lines 114 to 115, the call to builder.build().unwrap() can cause a panic if building the gitignore fails. Replace unwrap() with proper error handling by matching on the Result returned by builder.build(), and handle the error case gracefully, such as returning an error or logging it, to prevent the program from panicking.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-04T07:13:19Z
author_association: NONE
diff_hunk: @@ -1,21 +1,185 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+            else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
+        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+            .ignore(true)
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Handle URI to file path conversion error**

The code uses `unwrap()` to convert a URI to file path, which could crash the language server if the URI is invalid.


```diff
-        let walk = ignore::WalkBuilder::new(root_uri.to_file_path().unwrap())
+        let root_path = match root_uri.to_file_path() {
+            Ok(path) => path,
+            Err(_) => {
+                warn!("Failed to convert URI to file path in create_ignore_glob: {}", root_uri);
+                return vec![];
+            }
+        };
+        let walk = ignore::WalkBuilder::new(root_path)
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
        // Safely convert the root URI to a file path, avoiding a panic on invalid URIs
        let root_path = match root_uri.to_file_path() {
            Ok(path) => path,
            Err(_) => {
                warn!(
                    "Failed to convert URI to file path in create_ignore_glob: {}",
                    root_uri
                );
                return vec![];
            }
        };
        let walk = ignore::WalkBuilder::new(root_path)
            .ignore(true)
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs around lines 78 to 79, the code uses unwrap() to convert a URI to a file path, which can cause a crash if the URI is invalid. Replace unwrap() with proper error handling by checking if the conversion returns Some(path) or None, and handle the None case gracefully, such as returning an error or logging it, to prevent the language server from crashing.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-04T07:13:19Z
author_association: NONE
diff_hunk: @@ -1,21 +1,185 @@
+use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
+use globset::Glob;
+use ignore::gitignore::Gitignore;
+use log::warn;
+use rustc_hash::{FxBuildHasher, FxHashMap};
 use tower_lsp_server::lsp_types::Uri;
 
-use oxc_linter::Linter;
+use oxc_linter::{ConfigStore, ConfigStoreBuilder, LintOptions, Linter, Oxlintrc};
+use tower_lsp_server::UriExt;
 
-use crate::linter::error_with_position::DiagnosticReport;
-use crate::linter::isolated_lint_handler::IsolatedLintHandler;
+use crate::linter::{
+    error_with_position::DiagnosticReport,
+    isolated_lint_handler::{IsolatedLintHandler, IsolatedLintHandlerOptions},
+};
+use crate::{ConcurrentHashMap, Options};
 
-use super::isolated_lint_handler::IsolatedLintHandlerOptions;
+use super::config_walker::ConfigWalker;
 
 #[derive(Clone)]
 pub struct ServerLinter {
     isolated_linter: Arc<IsolatedLintHandler>,
 }
 
 impl ServerLinter {
-    pub fn new_with_linter(linter: Linter, options: IsolatedLintHandlerOptions) -> Self {
+    /// Searches inside root_uri recursively for the default oxlint config files
+    /// and insert them inside the nested configuration
+    pub fn create_nested_configs(
+        root_uri: &Uri,
+        options: &Options,
+    ) -> ConcurrentHashMap<PathBuf, ConfigStore> {
+        // nested config is disabled, no need to search for configs
+        if !options.use_nested_configs() {
+            return ConcurrentHashMap::default();
+        }
+
+        let root_path = root_uri.to_file_path().expect("Failed to convert URI to file path");
+
+        let paths = ConfigWalker::new(&root_path).paths();
+        let nested_configs =
+            ConcurrentHashMap::with_capacity_and_hasher(paths.capacity(), FxBuildHasher);
+
+        for path in paths {
+            let file_path = Path::new(&path);
+            let Some(dir_path) = file_path.parent() else {
+                continue;
+            };
+
+            let Ok(oxlintrc) = Oxlintrc::from_file(file_path) else {
+                warn!("Skipping invalid config file: {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store_builder) = ConfigStoreBuilder::from_oxlintrc(false, oxlintrc)
+            else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+            let Ok(config_store) = config_store_builder.build() else {
+                warn!("Skipping config (builder failed): {}", file_path.display());
+                continue;
+            };
+
+            nested_configs.pin().insert(dir_path.to_path_buf(), config_store);
+        }
+
+        nested_configs
+    }
+
+    pub fn create_ignore_glob(root_uri: &Uri, oxlintrc: &Oxlintrc) -> Vec<Gitignore> {
+        let mut builder = globset::GlobSetBuilder::new();
+        // Collecting all ignore files
+        builder.add(Glob::new("**/.eslintignore").unwrap());
+        builder.add(Glob::new("**/.gitignore").unwrap());
+
+        let ignore_file_glob_set = builder.build().unwrap();
+
path: crates/oxc_language_server/src/linter/server_linter.rs
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Handle potential unwrap panics in glob creation**

The code contains multiple `unwrap()` calls that could panic if there are issues with glob pattern creation.


```diff
-        builder.add(Glob::new("**/.eslintignore").unwrap());
-        builder.add(Glob::new("**/.gitignore").unwrap());
-
-        let ignore_file_glob_set = builder.build().unwrap();
+        if let Ok(eslintignore_glob) = Glob::new("**/.eslintignore") {
+            builder.add(eslintignore_glob);
+        } else {
+            warn!("Failed to create glob pattern for .eslintignore");
+        }
+
+        if let Ok(gitignore_glob) = Glob::new("**/.gitignore") {
+            builder.add(gitignore_glob);
+        } else {
+            warn!("Failed to create glob pattern for .gitignore");
+        }
+
+        let ignore_file_glob_set = match builder.build() {
+            Ok(set) => set,
+            Err(err) => {
+                warn!("Failed to build glob set: {}", err);
+                return vec![];
+            }
+        };
```


> Committable suggestion skipped: line range outside the PR's diff.

<details>
<summary>🤖 Prompt for AI Agents (early access)</summary>

```
In crates/oxc_language_server/src/linter/server_linter.rs around lines 73 to 77, the use of unwrap() on Glob::new and builder.build() can cause panics if glob patterns are invalid or building fails. Replace unwrap() calls with proper error handling by matching on the Result returned from Glob::new and builder.build(), and handle errors gracefully, such as by returning a Result from the function or logging the error and exiting cleanly.
```

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-05-04T07:13:19Z
author_association: NONE

PR comments:
user: login: Sysix
created_at: 2025-05-02T13:04:52Z
body: * **#10789** <a href="https://app.graphite.dev/github/pr/oxc-project/oxc/10789?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
* **#10776** <a href="https://app.graphite.dev/github/pr/oxc-project/oxc/10776?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
* **#10775** <a href="https://app.graphite.dev/github/pr/oxc-project/oxc/10775?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
* **#10762** <a href="https://app.graphite.dev/github/pr/oxc-project/oxc/10762?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
* **#10761** <a href="https://app.graphite.dev/github/pr/oxc-project/oxc/10761?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a> 👈 <a href="https://app.graphite.dev/github/pr/oxc-project/oxc/10761?utm_source=stack-comment-view-in-graphite" target="_blank">(View in Graphite)</a>
* `main`
<hr />

## How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:
- <kbd>0-merge</kbd> - adds this PR to the back of the merge queue
- <kbd>hotfix</kbd> - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using [this link](https://app.graphite.dev/invite/github/oxc-project?ref=merge-queue-instructions-in-stack-comment&prId=10761).

<h2></h2>
<sub>

An organization admin has enabled the [Graphite Merge Queue](https://graphite.dev/docs/graphite-merge-queue) in this repository.

</sub>

<sub>

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

</sub>

<h2></h2>

This stack of pull requests is managed by <a href="https://graphite.dev?utm-source=stack-comment"><b>Graphite</b></a>. Learn more about <a href="https://stacking.dev/?utm_source=stack-comment">stacking</a>.
<!-- Current dependencies on/for this PR: -->
author_association: MEMBER
user: login: codspeed-hq[bot]
created_at: 2025-05-02T13:12:35Z
body: <!-- __CODSPEED_PERFORMANCE_REPORT_COMMENT__ -->
<!-- __CODSPEED_INSTRUMENTATION_PERFORMANCE_REPORT_COMMENT__ -->

## [CodSpeed Instrumentation Performance Report](https://codspeed.io/oxc-project/oxc/branches/05-02-refactor_language_server_move_functions_related_to_serverlinter_to_serverlinter_)

### Merging #10761 will **not alter performance**

<sub>Comparing <code>05-02-refactor_language_server_move_functions_related_to_serverlinter_to_serverlinter_</code> (3d794f6) with <code>main</code> (61dfcfd)</sub>



### Summary

`✅ 36` untouched benchmarks  




author_association: NONE
user: login: coderabbitai[bot]
created_at: 2025-05-02T14:39:10Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
<!-- walkthrough_start -->

## Walkthrough

The changes restructure the configuration and initialization logic for the linter within the language server. The `ServerLinter` struct is extended with new public static methods: `create_nested_configs`, `create_ignore_glob`, and `create_server_linter`. These methods handle the discovery and parsing of nested configuration files, the aggregation of ignore patterns from `.eslintignore`, `.gitignore`, and inline oxlintrc patterns, and the construction of the linter instance based on provided options and configurations. The internal constructor `new_with_linter` is made private and is now invoked only within these static methods. Correspondingly, the `WorkspaceWorker` struct is refactored to delegate all configuration and linter setup responsibilities to these new `ServerLinter` methods, removing its own private helper functions for these tasks. This centralizes configuration logic within `ServerLinter`, streamlining initialization and reducing code duplication. Related unit tests are updated or removed to reflect these structural changes.

<!-- walkthrough_end -->
<!-- internal state start -->


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= -->

<!-- internal state end -->
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author_association: NONE
user: login: Sysix
created_at: 2025-05-03T09:47:23Z
body: This should only be a move Fn A to B. The AI wants me to improve it all in one go 😆 
author_association: MEMBER
user: login: camc314
created_at: 2025-05-03T20:19:41Z
body: ### Merge activity

* **May 3, 4:19 PM EDT**: The merge label '0-merge' was detected. This PR will be added to the [Graphite merge queue](https://app.graphite.dev/merges?org=oxc-project&repo=oxc) once it meets the requirements.
* **May 3, 9:50 PM EDT**: `camc314` added this pull request to the [Graphite merge queue](https://app.graphite.dev/merges?org=oxc-project&repo=oxc).
* **May 4, 2:21 AM UTC**: The [Graphite merge queue](https://app.graphite.dev/merges?org=oxc-project&repo=oxc) couldn't merge this PR because **it timed out**.
* **May 4, 3:09 AM EDT**: The merge label '0-merge' was detected. This PR will be added to the [Graphite merge queue](https://app.graphite.dev/merges?org=oxc-project&repo=oxc) once it meets the requirements.
* **May 4, 3:09 AM EDT**: `Sysix` added this pull request to the [Graphite merge queue](https://app.graphite.dev/merges?org=oxc-project&repo=oxc).
* **May 4, 3:12 AM EDT**: Merged by the [Graphite merge queue](https://app.graphite.dev/merges?org=oxc-project&repo=oxc).

author_association: CONTRIBUTOR