refactor(linter): make fields of LintServiceOptions private

apps/oxlint/src/lint/mod.rs

@@ -89,7 +89,8 @@ impl Runner for LintRunner {
 
         let number_of_files = paths.len();
 
-        let cwd = std::env::current_dir().unwrap().into_boxed_path();
+        let cwd = std::env::current_dir().unwrap();
+        let mut options = LintServiceOptions::new(cwd, paths);
         let lint_options = LintOptions::default()
             .with_filter(filter)
             .with_config_path(basic_options.config)
@@ -122,8 +123,10 @@ impl Runner for LintRunner {
 
         let tsconfig = basic_options.tsconfig;
         if let Some(path) = tsconfig.as_ref() {
-            if !path.is_file() {
-                let path = if path.is_relative() { cwd.join(path) } else { path.clone() };
+            if path.is_file() {
+                options = options.with_tsconfig(path);
+            } else {
+                let path = if path.is_relative() { options.cwd().join(path) } else { path.clone() };
                 return CliRunResult::InvalidOptions {
                     message: format!(
                         "The tsconfig file {path:?} does not exist, Please provide a valid tsconfig file.",
@@ -132,7 +135,6 @@ impl Runner for LintRunner {
             }
         }
 
-        let options = LintServiceOptions { cwd, paths, tsconfig };
         let lint_service = LintService::new(linter, options);
         let mut diagnostic_service =
             Self::get_diagnostic_service(&warning_options, &output_options, &misc_options);

crates/oxc_linter/src/service.rs

@@ -25,13 +25,43 @@ use crate::{
 
 pub struct LintServiceOptions {
     /// Current working directory
-    pub cwd: Box<Path>,
+    cwd: Box<Path>,
 
     /// All paths to lint
-    pub paths: Vec<Box<Path>>,
+    paths: Vec<Box<Path>>,
 
     /// TypeScript `tsconfig.json` path for reading path alias and project references
-    pub tsconfig: Option<PathBuf>,
+    tsconfig: Option<PathBuf>,
+}
+
+impl LintServiceOptions {
+    #[must_use]
+    pub fn new<T>(cwd: T, paths: Vec<Box<Path>>) -> Self
+    where
+        T: Into<Box<Path>>,
+    {
+        Self { cwd: cwd.into(), paths, tsconfig: None }
+    }
+
+    #[inline]
+    #[must_use]
+    pub fn with_tsconfig<T>(mut self, tsconfig: T) -> Self
+    where
+        T: Into<PathBuf>,
+    {
+        let tsconfig = tsconfig.into();
+        // Should this be canonicalized?
+        let tsconfig = if tsconfig.is_relative() { self.cwd.join(tsconfig) } else { tsconfig };
+        debug_assert!(tsconfig.is_file());
+
+        self.tsconfig = Some(tsconfig);
+        self
+    }
+
+    #[inline]
+    pub fn cwd(&self) -> &Path {
+        &self.cwd
+    }
 }
 
 #[derive(Clone)]

crates/oxc_linter/src/tester.rs

@@ -378,7 +378,7 @@ impl Tester {
 
         let cwd = self.current_working_directory.clone();
         let paths = vec![path_to_lint.into_boxed_path()];
-        let options = LintServiceOptions { cwd, paths, tsconfig: None };
+        let options = LintServiceOptions::new(cwd, paths);
         let lint_service = LintService::from_linter(linter, options);
         let diagnostic_service = DiagnosticService::default();
         let tx_error = diagnostic_service.sender();