fix(pack): "pnpm pack" should work as expected when prepack modifies the manifest

.changeset/afraid-news-cheat.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/plugin-commands-publishing": patch
+"pnpm": patch
+---
+
+`pnpm pack` should work as expected when "prepack" modifies the manifest [#7558](https://github.com/pnpm/pnpm/pull/7558).

releasing/plugin-commands-publishing/src/pack.ts

@@ -87,7 +87,8 @@ export async function handler (
   const dir = entryManifest.publishConfig?.directory
     ? path.join(opts.dir, entryManifest.publishConfig.directory)
     : opts.dir
-  const manifest = (opts.dir !== dir) ? (await readProjectManifest(dir, opts)).manifest : entryManifest
+  // always read the latest manifest, as "prepack" or "prepare" script may modify package manifest.
+  const manifest = (await readProjectManifest(dir, opts)).manifest
   if (!manifest.name) {
     throw new PnpmError('PACKAGE_NAME_NOT_FOUND', `Package name is not defined in the ${manifestFileName}.`)
   }

releasing/plugin-commands-publishing/test/pack.ts

@@ -346,3 +346,50 @@ test('pack: should resolve correct files from publishConfig', async () => {
   expect(await exists('./package/dist-index.js')).toBeTruthy()
   expect(await exists('./package/dist-bin.js')).toBeTruthy()
 })
+
+test('pack: modify manifest in prepack script', async () => {
+  prepare({
+    name: 'custom-publish-dir',
+    version: '0.0.0',
+    main: './src/index.ts',
+    bin: './src/bin.js',
+    files: [
+      'dist',
+    ],
+    scripts: {
+      prepack: 'node ./prepack.js',
+    },
+  })
+  fs.mkdirSync('./src')
+  fs.writeFileSync('./src/index.ts', 'index', 'utf8')
+  fs.writeFileSync('./src/bin.js', 'bin', 'utf8')
+  fs.mkdirSync('./dist')
+  fs.writeFileSync('./dist/index.js', 'index', 'utf8')
+  fs.writeFileSync('./dist/bin.js', 'bin', 'utf8')
+  fs.writeFileSync('./prepack.js', `
+  require('fs').writeFileSync('./package.json',
+    JSON.stringify({
+      name: 'custom-publish-dir',
+      version: '0.0.0',
+      main: './dist/index.js',
+      bin: './dist/bin.js',
+      files: [
+        'dist'
+      ]
+    }, null, 2), 'utf8')
+  `, 'utf8')
+
+  await pack.handler({
+    ...DEFAULT_OPTS,
+    argv: { original: [] },
+    dir: process.cwd(),
+    extraBinPaths: [],
+    packDestination: process.cwd(),
+  })
+  await tar.x({ file: 'custom-publish-dir-0.0.0.tgz' })
+  expect(await exists('./package/src/bin.js')).toBeFalsy()
+  expect(await exists('./package/src/index.ts')).toBeFalsy()
+  expect(await exists('./package/package.json')).toBeTruthy()
+  expect(await exists('./package/dist/index.js')).toBeTruthy()
+  expect(await exists('./package/dist/bin.js')).toBeTruthy()
+})