feat(napi/parser,napi/transform): accept lang=dts

crates/oxc_napi/src/lib.rs

@@ -68,6 +68,7 @@ pub fn get_source_type(
         Some("jsx") => SourceType::jsx(),
         Some("ts") => SourceType::ts(),
         Some("tsx") => SourceType::tsx(),
+        Some("dts") => SourceType::d_ts(),
         _ => SourceType::from_path(filename).unwrap_or_default(),
     };
     match source_type {

napi/parser/index.d.ts

@@ -137,8 +137,8 @@ export declare const enum ImportNameKind {
 export declare function parseAsync(filename: string, sourceText: string, options?: ParserOptions | undefined | null): Promise<ParseResult>
 
 export interface ParserOptions {
-  /** Treat the source text as `js`, `jsx`, `ts`, or `tsx`. */
-  lang?: 'js' | 'jsx' | 'ts' | 'tsx'
+  /** Treat the source text as `js`, `jsx`, `ts`, `tsx` or `dts`. */
+  lang?: 'js' | 'jsx' | 'ts' | 'tsx' | 'dts'
   /** Treat the source text as `script` or `module` code. */
   sourceType?: 'script' | 'module' | 'unambiguous' | undefined
   /**

napi/parser/src/types.rs

@@ -7,8 +7,8 @@ use oxc_napi::{Comment, OxcError};
 #[napi(object)]
 #[derive(Default)]
 pub struct ParserOptions {
-    /// Treat the source text as `js`, `jsx`, `ts`, or `tsx`.
-    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx'")]
+    /// Treat the source text as `js`, `jsx`, `ts`, `tsx` or `dts`.
+    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx' | 'dts'")]
     pub lang: Option<String>,
 
     /// Treat the source text as `script` or `module` code.

napi/parser/test/parse.test.ts

@@ -2,7 +2,7 @@ import { Worker } from 'node:worker_threads';
 import { describe, expect, it, test } from 'vitest';
 
 import { parseAsync, parseSync } from '../index.js';
-import type { ExpressionStatement, ParserOptions, TSTypeAliasDeclaration } from '../index.js';
+import type { ExpressionStatement, ParserOptions, TSTypeAliasDeclaration, VariableDeclaration } from '../index.js';
 
 describe('parse', () => {
   const code = '/* comment */ foo';
@@ -55,6 +55,12 @@ describe('parse', () => {
       // Parsed as `await 1`
       expect((ret.program.body[0] as ExpressionStatement).expression.type).toBe('AwaitExpression');
     });
+    test('sets lang as dts', () => {
+      const code = 'declare const foo';
+      const ret = parseSync('test', code, { lang: 'dts' });
+      expect(ret.errors.length).toBe(0);
+      expect((ret.program.body[0] as VariableDeclaration).declare).toBe(true);
+    });
   });
 
   describe('TS properties', () => {

napi/transform/index.d.ts

@@ -359,8 +359,8 @@ export declare function transform(filename: string, sourceText: string, options?
  * @see {@link transform}
  */
 export interface TransformOptions {
-  /** Treat the source text as `js`, `jsx`, `ts`, or `tsx`. */
-  lang?: 'js' | 'jsx' | 'ts' | 'tsx'
+  /** Treat the source text as `js`, `jsx`, `ts`, `tsx`, or `dts`. */
+  lang?: 'js' | 'jsx' | 'ts' | 'tsx' | 'dts'
   /** Treat the source text as `script` or `module` code. */
   sourceType?: 'script' | 'module' | 'unambiguous' | undefined
   /**

napi/transform/src/transformer.rs

@@ -86,8 +86,8 @@ pub struct TransformResult {
 #[napi(object)]
 #[derive(Default)]
 pub struct TransformOptions {
-    /// Treat the source text as `js`, `jsx`, `ts`, or `tsx`.
-    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx'")]
+    /// Treat the source text as `js`, `jsx`, `ts`, `tsx`, or `dts`.
+    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx' | 'dts'")]
     pub lang: Option<String>,
 
     /// Treat the source text as `script` or `module` code.