ci: run cache regression tests on Node.js 24

.github/workflows/pr-check.yaml

@@ -13,10 +13,10 @@ jobs:
   check-dist:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413 # v6.1.0
+        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
         with:
           run_install: true
           version: 11

.github/workflows/test.yaml

@@ -7,9 +7,6 @@ on:
       - master
   workflow_dispatch:
 
-permissions:
-  contents: read
-
 jobs:
   smoke:
     # Cross-OS coverage. Exercises the bootstrap install + PATH on each platform,
@@ -54,7 +51,7 @@ jobs:
             version: '12.3.4'
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - id: pnpm
         name: Run the action
@@ -73,9 +70,6 @@ jobs:
           set -e
           which pnpm
           which pnpx
-          case "$PNPM_HOME" in
-            ''|*node_modules*) echo "PNPM_HOME must be set outside node_modules"; exit 1 ;;
-          esac
           actual="$(pnpm --version)"
           echo "pnpm --version: ${actual}"
           if [ "${actual}" != "${REQUIRED}" ]; then
@@ -140,7 +134,7 @@ jobs:
             expect_pm_on_fail_unset: true
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Set up package.json
         run: echo '${{ matrix.manifest }}' > package.json
@@ -189,7 +183,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           persist-credentials: false
 
@@ -240,7 +234,7 @@ jobs:
     env:
       REQUIRED: ${{ matrix.version }}
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           persist-credentials: false
 
@@ -304,7 +298,7 @@ jobs:
     name: 'Standalone Windows self-update (PATH regression)'
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Set up package.json with a minimal manifest
         # run_install needs a manifest to install against. Removing the
@@ -362,7 +356,7 @@ jobs:
             manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=10 <11"}},"dependencies":{"is-odd":"3.0.1"}}'
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Set up package.json
         run: echo '${{ matrix.manifest }}' > package.json
@@ -406,7 +400,7 @@ jobs:
                 - yarn
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Run the action
         uses: ./

README.md

@@ -64,7 +64,7 @@ Input and output changes:
 
 Version of pnpm to install.
 
-**Optional** when `package.json` declares pnpm in `packageManager`, or sets `devEngines.packageManager.name` to `"pnpm"` and provides `devEngines.packageManager.version`.
+**Optional** when there is a [`packageManager` or `devEngines.packageManager` field in the `package.json`](https://nodejs.org/api/corepack.html).
 
 otherwise, this field is **required** It supports npm versioning scheme, it could be an exact version (such as `10.9.8`), or a version range (such as `10`, `10.x.x`, `10.9.x`, `^10.9.8`, `*`, etc.), or `latest`.
 
@@ -157,8 +157,6 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
-
       - uses: pnpm/action-setup@v6
 ```
 

src/install-pnpm/run.ts

@@ -72,12 +72,14 @@ export async function runSelfInstaller(inputs: Inputs): Promise<SelfInstallerRes
     return { exitCode: npmExitCode, binDest: path.join(dest, 'node_modules', '.bin') }
   }
 
-  const bootstrapBinDir = standalone && process.platform === 'win32'
+  const pnpmHome = standalone && process.platform === 'win32'
     ? path.join(dest, 'node_modules', '@pnpm', 'exe')
     : path.join(dest, 'node_modules', '.bin')
-  const pnpmHome = path.join(dest, 'pnpm-home')
-  await mkdir(pnpmHome, { recursive: true })
-  addPath(bootstrapBinDir)
+  // PNPM_HOME/bin is where `pnpm self-update` places the target version
+  // binary. It must have higher PATH precedence than pnpmHome (which
+  // contains the bootstrap binary) so the self-updated version is found
+  // first. The bootstrap pnpm is invoked via absolute path, not PATH,
+  // so this ordering does not affect the bootstrap step.
   addPath(pnpmHome)
   addPath(path.join(pnpmHome, 'bin'))
   exportVariable('PNPM_HOME', pnpmHome)
@@ -104,17 +106,25 @@ export async function runSelfInstaller(inputs: Inputs): Promise<SelfInstallerRes
   const bootstrapVersion = native ? bootstrapNativeVersion : standalone ? bootstrapExeVersion : bootstrapPnpmVersion
 
   if (targetVersion === bootstrapVersion || (native && satisfies(bootstrapVersion, targetVersion))) {
-    return { exitCode: 0, binDest: bootstrapBinDir }
+    return { exitCode: 0, binDest: pnpmHome }
   }
 
   const cmd = native || standalone ? bootstrapPnpm : process.execPath
   const args = native || standalone ? ['self-update', targetVersion] : [bootstrapPnpm, 'self-update', targetVersion]
   const exitCode = await runCommand(cmd, args, { cwd: dest })
   if (exitCode !== 0) {
-    return { exitCode, binDest: bootstrapBinDir }
+    return { exitCode, binDest: pnpmHome }
   }
+  // self-update writes the target pnpm/pnpx into PNPM_HOME/bin, leaving
+  // the bootstrap symlinks in pnpmHome pointing at the old version. Use
+  // PNPM_HOME/bin so consumers of the bin_dest output (e.g.
+  // `${steps.pnpm.outputs.bin_dest}/pnpm`) invoke the requested version.
+  //
+  // When the requested version resolves to the bootstrap version, self-update
+  // is a no-op and PNPM_HOME/bin is not created — fall back to pnpmHome,
+  // whose symlinks already point at the right version.
   const updatedBinDir = path.join(pnpmHome, 'bin')
-  return { exitCode: 0, binDest: existsSync(updatedBinDir) ? updatedBinDir : bootstrapBinDir }
+  return { exitCode: 0, binDest: existsSync(updatedBinDir) ? updatedBinDir : pnpmHome }
 }
 
 function readTargetVersion(opts: {