extract recast parser config into extra file, add vendor information and license

Author: Lms24

packages/sveltekit/src/vite/autoInstrument.ts

@@ -2,10 +2,9 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as recast from 'recast';
 import t = recast.types.namedTypes;
-import type { ParserPlugin } from '@babel/parser';
-import { parse as babelParse } from '@babel/parser';
 import type { Plugin } from 'vite';
 import { WRAPPED_MODULE_SUFFIX } from '../common/utils';
+import { parser } from './recastTypescriptParser';
 
 export type AutoInstrumentSelection = {
   /**
@@ -103,56 +102,6 @@ export async function canWrapLoad(id: string, debug: boolean): Promise<boolean>
 
   const code = (await fs.promises.readFile(id, 'utf8')).toString();
 
-  // Taken from recast's typescript parser config, minus the JSX plugin
-  // see: https://github.com/benjamn/recast/blob/master/parsers/_babel_options.ts
-  // see: https://github.com/benjamn/recast/blob/master/parsers/babel-ts.ts
-  const parser = {
-    parse: (source: string) =>
-      babelParse(source, {
-        plugins: [
-          'typescript',
-          'asyncGenerators',
-          'bigInt',
-          'classPrivateMethods',
-          'classPrivateProperties',
-          'classProperties',
-          'classStaticBlock',
-          'decimal',
-          'decorators-legacy',
-          'doExpressions',
-          'dynamicImport',
-          'exportDefaultFrom',
-          'exportNamespaceFrom',
-          'functionBind',
-          'functionSent',
-          'importAssertions',
-          'exportExtensions' as ParserPlugin,
-          'importMeta',
-          'nullishCoalescingOperator',
-          'numericSeparator',
-          'objectRestSpread',
-          'optionalCatchBinding',
-          'optionalChaining',
-          [
-            'pipelineOperator',
-            {
-              proposal: 'minimal',
-            },
-          ],
-          [
-            'recordAndTuple',
-            {
-              syntaxType: 'hash',
-            },
-          ],
-          'throwExpressions',
-          'topLevelAwait',
-          'v8intrinsic',
-        ],
-        sourceType: 'module',
-      }),
-  };
-
   const ast = recast.parse(code, {
     parser,
   });

packages/sveltekit/src/vite/recastTypescriptParser.ts

@@ -0,0 +1,85 @@
+// This babel parser config is taken from recast's typescript parser config, specifically from these two files:
+// see: https://github.com/benjamn/recast/blob/master/parsers/_babel_options.ts
+// see: https://github.com/benjamn/recast/blob/master/parsers/babel-ts.ts
+//
+// Changes:
+// - we don't add the 'jsx' plugin, to correctly parse TypeScript angle bracket type assertions
+//   (see https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#type-assertions)
+// - minor import and export changes
+// - merged the two files linked above into one for simplicity
+
+// Date of access: 2025-03-04
+// Commit: https://github.com/benjamn/recast/commit/ba5132174894b496285da9d001f1f2524ceaed3a
+
+// Recast license:
+
+// Copyright (c) 2012 Ben Newman <[email protected]>
+
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import type { ParserPlugin } from '@babel/parser';
+import { parse as babelParse } from '@babel/parser';
+
+export const parser = {
+  parse: (source: string) =>
+    babelParse(source, {
+      plugins: [
+        'typescript',
+        'asyncGenerators',
+        'bigInt',
+        'classPrivateMethods',
+        'classPrivateProperties',
+        'classProperties',
+        'classStaticBlock',
+        'decimal',
+        'decorators-legacy',
+        'doExpressions',
+        'dynamicImport',
+        'exportDefaultFrom',
+        'exportNamespaceFrom',
+        'functionBind',
+        'functionSent',
+        'importAssertions',
+        'exportExtensions' as ParserPlugin,
+        'importMeta',
+        'nullishCoalescingOperator',
+        'numericSeparator',
+        'objectRestSpread',
+        'optionalCatchBinding',
+        'optionalChaining',
+        [
+          'pipelineOperator',
+          {
+            proposal: 'minimal',
+          },
+        ],
+        [
+          'recordAndTuple',
+          {
+            syntaxType: 'hash',
+          },
+        ],
+        'throwExpressions',
+        'topLevelAwait',
+        'v8intrinsic',
+      ],
+      sourceType: 'module',
+    }),
+};