feat(typescript): add tsconfigRootDir option to typescript config

Allow specifying custom tsconfig root directory path for better project structure flexibility

Author: AndreyYolkin

src/configs/ts.ts

@@ -60,12 +60,15 @@ export function typescript (options: Options['ts'] = true): TypedFlatConfigItem[
   }
   const preset = (options === true || !options?.preset) ? 'recommended' : options.preset
   const projectService = (typeof options === 'object' && options?.projectService) || ['recommendedTypeChecked', 'strictTypeChecked', 'all'].includes(preset)
+  const tsconfigRootDir = typeof options === 'object' ? options?.tsconfigRootDir : undefined
+
   return [
     ...typescriptCore(preset),
     {
       languageOptions: {
         parserOptions: {
           projectService,
+          tsconfigRootDir,
         },
       },
     },

src/schema.ts

@@ -21,6 +21,7 @@ export const typescriptSchema = v.exactOptional(
       files: v.exactOptional(v.array(v.string())),
       preset: v.exactOptional(tsPresets, 'recommended'),
       projectService: v.exactOptional(v.boolean()),
+      tsconfigRootDir: v.exactOptional(v.string()),
     }),
   ]),
   hasPackage('typescript'),

tests/config.test.ts

@@ -53,7 +53,7 @@ describe('validateOptions: full and edge case validation', () => {
 
 describe('validateOptions: partial and matrix edge cases', () => {
   const matrix = [
-    { key: 'ts', values: [true, false, { files: ['src/**/*.ts'] }, { preset: 'strict' }, { files: ['src/a.ts'], preset: 'all' }] },
+    { key: 'ts', values: [true, false, { files: ['src/**/*.ts'] }, { preset: 'strict' }, { files: ['src/a.ts'], preset: 'all' }, { tsconfigRootDir: '/path/to/root' }] },
     { key: 'vue', values: [true, false, { files: ['src/**/*.vue'] }, { a11y: true }, { files: ['src/a.vue'], a11y: false }] },
     { key: 'perfectionist', values: [true, false, { files: ['src/**/*.js'] }, { import: true }, { export: false }, { import: false, export: false }] },
   ]