Attempt to fix Node 25.7+ EBADF by reading CJS source of zip files ourselves

Author: Normal Gaussian

.pnp.loader.mjs

@@ -0,0 +1,35 @@
+releases:
+  "@yarnpkg/builder": patch
+  "@yarnpkg/cli": patch
+  "@yarnpkg/core": patch
+  "@yarnpkg/doctor": patch
+  "@yarnpkg/extensions": patch
+  "@yarnpkg/nm": patch
+  "@yarnpkg/plugin-catalog": patch
+  "@yarnpkg/plugin-compat": patch
+  "@yarnpkg/plugin-constraints": patch
+  "@yarnpkg/plugin-dlx": patch
+  "@yarnpkg/plugin-essentials": patch
+  "@yarnpkg/plugin-exec": patch
+  "@yarnpkg/plugin-file": patch
+  "@yarnpkg/plugin-git": patch
+  "@yarnpkg/plugin-github": patch
+  "@yarnpkg/plugin-http": patch
+  "@yarnpkg/plugin-init": patch
+  "@yarnpkg/plugin-interactive-tools": patch
+  "@yarnpkg/plugin-jsr": patch
+  "@yarnpkg/plugin-link": patch
+  "@yarnpkg/plugin-nm": patch
+  "@yarnpkg/plugin-npm": patch
+  "@yarnpkg/plugin-npm-cli": patch
+  "@yarnpkg/plugin-pack": patch
+  "@yarnpkg/plugin-patch": patch
+  "@yarnpkg/plugin-pnp": patch
+  "@yarnpkg/plugin-pnpm": patch
+  "@yarnpkg/plugin-stage": patch
+  "@yarnpkg/plugin-typescript": patch
+  "@yarnpkg/plugin-version": patch
+  "@yarnpkg/plugin-workspace-tools": patch
+  "@yarnpkg/pnp": patch
+  "@yarnpkg/pnpify": patch
+  "@yarnpkg/sdks": patch

.yarn/versions/32e18d27.yml

@@ -1,9 +1,9 @@
-import {VirtualFS, npath}                                                                            from '@yarnpkg/fslib';
-import fs                                                                                            from 'fs';
-import {fileURLToPath, pathToFileURL}                                                                from 'url';
+import {VirtualFS, npath}                                                                                                          from '@yarnpkg/fslib';
+import fs                                                                                                                          from 'fs';
+import {fileURLToPath, pathToFileURL}                                                                                              from 'url';
 
-import {SUPPORTS_IMPORT_ATTRIBUTES, SUPPORTS_IMPORT_ATTRIBUTES_ONLY, WATCH_MODE_MESSAGE_USES_ARRAYS} from '../loaderFlags';
-import * as loaderUtils                                                                              from '../loaderUtils';
+import {HAS_BROKEN_FSTAT_FOR_ZIP_FDS, SUPPORTS_IMPORT_ATTRIBUTES, SUPPORTS_IMPORT_ATTRIBUTES_ONLY, WATCH_MODE_MESSAGE_USES_ARRAYS} from '../loaderFlags';
+import * as loaderUtils                                                                                                            from '../loaderUtils';
 
 // The default `load` doesn't support reading from zip files
 export async function load(
@@ -61,9 +61,14 @@ export async function load(
     });
   }
 
+  const shouldReadSource = format === `commonjs` && HAS_BROKEN_FSTAT_FOR_ZIP_FDS && filePath.includes(`.zip/`);
+  const source = format !== `commonjs` || shouldReadSource
+    ? await fs.promises.readFile(filePath, `utf8`)
+    : undefined;
+
   return {
     format,
-    source: format === `commonjs` ? undefined : await fs.promises.readFile(filePath, `utf8`),
+    source,
     shortCircuit: true,
   };
 }

packages/yarnpkg-pnp/sources/esm-loader/built-loader.js

@@ -20,3 +20,5 @@ export const SUPPORTS_IMPORT_ATTRIBUTES = major >= 21 || (major === 20 && minor
 
 // https://github.com/nodejs/node/pull/52104
 export const SUPPORTS_IMPORT_ATTRIBUTES_ONLY = major >= 22;
+
+export const HAS_BROKEN_FSTAT_FOR_ZIP_FDS = major > 25 || (major === 25 && minor >= 7);