fix(fmt): inject SWC Next version into cache namespace

chenjiahan · Sep 22, 2026 · Sep 7, 2026 · Sep 22, 2026 · Sep 22, 2026 · Sep 22, 2026
commit 8b237034b42bb5b07e622b9795bc3292760c7c3e
diff --git a/packages/rstack/rslib.config.ts b/packages/rstack/rslib.config.ts
@@ -1,7 +1,14 @@
+import { readFileSync } from 'node:fs';
+import { findPackageJSON } from 'node:module';
 import { defineConfig } from '@rslib/core';
 import prettierPkgJson from 'prettier/package.json' with { type: 'json' };
 import pkgJson from './package.json' with { type: 'json' };
 
+// @swc-next/parser does not export its package.json.
+const swcNextPkgJson = JSON.parse(
+  readFileSync(findPackageJSON('@swc-next/parser', import.meta.url)!, 'utf8'),
+) as { version: string };
+
 const fullyMinifiedChunks =
   /(?:fmt(?:Lsp|Plugins)?|sortPackageJsonPlugin|staged)\.js$/;
 
@@ -27,6 +34,7 @@ export default defineConfig({
     define: {
       PRETTIER_VERSION: JSON.stringify(prettierPkgJson.version),
       RSTACK_VERSION: JSON.stringify(pkgJson.version),
+      SWC_NEXT_VERSION: JSON.stringify(swcNextPkgJson.version),
     },
   },
   output: {

diff --git a/packages/rstack/src/fmt/cacheIdentity.ts b/packages/rstack/src/fmt/cacheIdentity.ts
@@ -7,6 +7,7 @@ import type { ResolvedFmtOptions } from './types.ts';
 
 declare const PRETTIER_VERSION: string;
 declare const RSTACK_VERSION: string;
+declare const SWC_NEXT_VERSION: string;
 
 type CacheKeyResolver = (filePath: string) => string | undefined;
 type OptionsHasher = (options: ResolvedFmtOptions) => string | undefined;
@@ -21,7 +22,7 @@ const cacheNamespace: string = JSON.stringify([
   fmtCacheVersion,
   RSTACK_VERSION,
   PRETTIER_VERSION,
-  'swc-next@0.2.2:npm',
+  `swc-next@${SWC_NEXT_VERSION}:npm`,
 ]);
 
 /** Creates project-relative POSIX cache keys without repeating path setup. */

diff --git a/packages/rstack/tests/fmt/cacheIdentity.test.ts b/packages/rstack/tests/fmt/cacheIdentity.test.ts
@@ -1,3 +1,5 @@
+import { readFileSync } from 'node:fs';
+import { findPackageJSON } from 'node:module';
 import path from 'node:path';
 import { pathToFileURL } from 'node:url';
 import prettierPkgJson from 'prettier/package.json' with { type: 'json' };
@@ -84,11 +86,15 @@ test('bypasses user plugins and unserializable options', () => {
 });
 
 test('includes formatter implementation versions in the namespace', () => {
+  const swcNextPkgJson = JSON.parse(
+    readFileSync(findPackageJSON('@swc-next/parser', import.meta.url)!, 'utf8'),
+  ) as { version: string };
+
   expect(JSON.parse(cacheNamespace)).toEqual([
     fmtCacheVersion,
     pkgJson.version,
     prettierPkgJson.version,
-    'swc-next@0.2.2:npm',
+    `swc-next@${swcNextPkgJson.version}:npm`,
   ]);
 });