build: rebuild dist with clean lockfile-matched deps

Direct GitHub-expression interpolation of `${{ steps.pnpm.outputs.bin_dest }}`
into the bash script let bash eat the backslashes in the Windows path
(`C:Usersrunneradminsetup-pnpmnode_modules.binbin/pnpm`), failing with
"No such file or directory". Forward the value via env so the path
reaches bash unmangled.

.github/CODEOWNERS

@@ -1 +0,0 @@
-* @zkochan

.github/workflows/test.yaml

@@ -1,73 +1,43 @@
 name: Test Action
 
 on:
-  pull_request:
-  push:
-    branches:
-      - master
-  workflow_dispatch:
+  - push
+  - pull_request
+  - workflow_dispatch
 
 jobs:
-  smoke:
-    # Cross-OS coverage. Exercises the bootstrap install + PATH on each platform,
-    # the version-respects-request regression (#225 / #230 — Windows PATH shadow),
-    # and the bin_dest output regression (#247). Multi-version coverage on Linux
-    # so we don't pay 3x for major-version differences.
-    name: 'Smoke (${{ matrix.name }})'
+  test_default_inputs:
+    name: Test with default inputs
 
     runs-on: ${{ matrix.os }}
 
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - name: 'ubuntu / v9.15.5'
-            os: ubuntu-latest
-            version: '9.15.5'
-          - name: 'ubuntu / v10.33.0'
-            os: ubuntu-latest
-            version: '10.33.0'
-          - name: 'ubuntu / v9.15.5 / custom-dest'
-            os: ubuntu-latest
-            version: '9.15.5'
-            dest: '~/test/pnpm'
-          - name: 'macos / v9.15.5'
-            os: macos-latest
-            version: '9.15.5'
-          - name: 'windows / v9.15.5'
-            os: windows-latest
-            version: '9.15.5'
+        pnpm:
+          - 9.15.5
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
 
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
-      - id: pnpm
-        name: Run the action
+      - name: Run the action
         uses: ./
         with:
-          version: ${{ matrix.version }}
-          dest: ${{ matrix.dest || '~/setup-pnpm' }}
+          version: 9.15.5
 
-      - name: 'Test: pnpm/pnpx on PATH report the requested version (incl. via bin_dest)'
-        # Pass paths via env, not template interpolation, so Windows
-        # backslashes in `bin_dest` aren't eaten by bash's escape handling.
-        env:
-          BIN_DEST: ${{ steps.pnpm.outputs.bin_dest }}
-          REQUIRED: ${{ matrix.version }}
+      - name: 'Test: which'
+        run: which pnpm; which pnpx
+
+      - name: 'Test: version'
         run: |
-          set -e
-          which pnpm
-          which pnpx
           actual="$(pnpm --version)"
-          echo "pnpm --version: ${actual}"
-          if [ "${actual}" != "${REQUIRED}" ]; then
-            echo "Expected pnpm version ${REQUIRED}, but got ${actual}"
-            exit 1
-          fi
-          bin_dest_version="$("$BIN_DEST/pnpm" --version)"
-          echo "bin_dest pnpm --version: ${bin_dest_version}"
-          if [ "${bin_dest_version}" != "${REQUIRED}" ]; then
-            echo "Expected ${REQUIRED} via bin_dest, but got ${bin_dest_version}"
+          echo "pnpm version: ${actual}"
+          if [[ ! "${actual}" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-.+)?$ ]]; then
+            echo "ERROR: pnpm --version did not produce valid output"
             exit 1
           fi
         shell: bash
@@ -80,95 +50,54 @@ jobs:
           pnpm add is-odd
         shell: bash
 
-  manifest_pin:
-    # Folds the old test_package_manager_field, test_dev_engines, and
-    # test_dev_engines_on_fail_error jobs. The action's manifest handling is
-    # OS-independent, so ubuntu-only is sufficient.
-    name: 'Manifest pin: ${{ matrix.label }}'
+  test_dest:
+    name: Test with dest
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
 
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - label: 'packageManager pnpm@9.15.5 (#227)'
-            manifest: '{"packageManager":"pnpm@9.15.5"}'
-            version: '9.15.5'
-          - label: 'packageManager pnpm@10.33.0'
-            manifest: '{"packageManager":"pnpm@10.33.0"}'
-            version: '10.33.0'
-          - label: 'devEngines onFail=download, exact'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"9.15.5","onFail":"download"}}}'
-            version: '9.15.5'
-          - label: 'devEngines onFail=download, range'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=9.15.0","onFail":"download"}}}'
-            version: '>=9.15.0'
-          - label: 'devEngines onFail=error, exact (#252)'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"9.15.5","onFail":"error"}}}'
-            version: '9.15.5'
-          - label: 'devEngines onFail=error, range (#252)'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=9.15.0","onFail":"error"}}}'
-            version: '>=9.15.0'
-          - label: 'explicit version: pnpm_config_pm_on_fail not exported'
-            # Regression guard for the af8e203 scope fix: when the user passes an
-            # explicit `version:` input, the action must NOT export
-            # pnpm_config_pm_on_fail=download, so the user's strict onFail policy
-            # is preserved. Asserted directly on the env var rather than pnpm
-            # runtime behavior — different pnpm majors read devEngines
-            # differently (v10 ignores it, v11+ honors it).
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"9.15.5","onFail":"error"}}}'
-            explicit_version: '10.33.0'
-            expect_pm_on_fail_unset: true
+        pnpm:
+          - 9.15.5
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
 
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
-      - name: Set up package.json
-        run: echo '${{ matrix.manifest }}' > package.json
-        shell: bash
-
       - name: Run the action
         uses: ./
         with:
-          version: ${{ matrix.explicit_version }}
+          version: 9.15.5
+          dest: ~/test/pnpm
 
-      - name: 'Test: pnpm reports the pinned version'
-        if: ${{ !matrix.expect_pm_on_fail_unset }}
-        env:
-          REQUIRED: ${{ matrix.version }}
+      - name: 'Test: which'
+        run: which pnpm && which pnpx
+
+      - name: 'Test: version'
         run: |
-          set -e
           actual="$(pnpm --version)"
           echo "pnpm version: ${actual}"
-          if [ "${REQUIRED}" = ">=9.15.0" ]; then
-            min="9.15.0"
-            if [ "$(printf '%s\n' "${min}" "${actual}" | sort -V | head -n1)" != "${min}" ]; then
-              echo "Expected pnpm version >= ${min}, but got ${actual}"
-              exit 1
-            fi
-          else
-            if [ "${actual}" != "${REQUIRED}" ]; then
-              echo "Expected pnpm version ${REQUIRED}, but got ${actual}"
-              exit 1
-            fi
-          fi
-        shell: bash
-
-      - name: 'Test: pnpm_config_pm_on_fail not exported (explicit version preserves strict policy)'
-        if: ${{ matrix.expect_pm_on_fail_unset }}
-        run: |
-          if [ -n "${pnpm_config_pm_on_fail:-}" ]; then
-            echo "Expected pnpm_config_pm_on_fail to be unset, but got: '${pnpm_config_pm_on_fail}'"
+          if [[ ! "${actual}" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-.+)?$ ]]; then
+            echo "ERROR: pnpm --version did not produce valid output"
             exit 1
           fi
-          echo "pnpm_config_pm_on_fail is unset, as expected"
         shell: bash
 
-  standalone:
-    name: Standalone mode
+  test_standalone:
+    name: Test with standalone
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
 
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
@@ -179,77 +108,210 @@ jobs:
           version: 9.15.0
           standalone: true
 
-      - name: 'Test: pnpm works'
+      - name: 'Test: which'
+        run: which pnpm
+
+      - name: 'Test: version'
         run: |
-          set -e
-          which pnpm
           actual="$(pnpm --version)"
-          if [ "${actual}" != "9.15.0" ]; then
-            echo "Expected 9.15.0, got ${actual}"
+          echo "pnpm version: ${actual}"
+          if [[ ! "${actual}" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-.+)?$ ]]; then
+            echo "ERROR: pnpm --version did not produce valid output"
             exit 1
           fi
+        shell: bash
+
+      - name: 'Test: install in a fresh project'
+        run: |
           mkdir /tmp/test-standalone
           cd /tmp/test-standalone
           pnpm init
           pnpm add is-odd
         shell: bash
 
-  cache_store_path:
-    # Regression guard for #233. When package.json pins a pnpm major that
-    # differs from the bootstrap pnpm's major, the bootstrap reports its
-    # own STORE_VERSION from `pnpm store path` (the `store` command skips
-    # pnpm's auto-switch). The user's actual `pnpm install` runs under the
-    # pinned version and writes to a different STORE_VERSION, so the post
-    # step's saveCache then fails with "Path Validation Error". The fix is
-    # to self-update the bootstrap to the pinned version up front.
-    name: 'Cache store path matches install (#233): ${{ matrix.label }}'
+  test_version_respects_request:
+    name: 'Test version input is actually installed (${{ matrix.version }}, ${{ matrix.os }})'
+    # Regression test for #225 / #230: the bootstrap pnpm on PATH was shadowing the self-updated binary,
+    # so a user requesting e.g. `version: 9.15.5` would silently get the bootstrap version.
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
 
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - label: 'packageManager pnpm@10.33.0'
-            manifest: '{"packageManager":"pnpm@10.33.0","dependencies":{"is-odd":"3.0.1"}}'
-          - label: 'devEngines exact pnpm@10.33.0'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"10.33.0"}},"dependencies":{"is-odd":"3.0.1"}}'
-          - label: 'devEngines range >=10 <11'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=10 <11"}},"dependencies":{"is-odd":"3.0.1"}}'
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        version:
+          - '9.15.5'
+          - '10.33.0'
 
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
-      - name: Set up package.json
-        run: echo '${{ matrix.manifest }}' > package.json
-        shell: bash
-
-      - id: pnpm
+      - name: Run the action
         uses: ./
         with:
-          cache: true
-          run_install: |
-            - args: [--no-frozen-lockfile]
+          version: ${{ matrix.version }}
 
-      - name: 'Test: store path computed by the action exists on disk'
+      - name: 'Test: exact version installed'
         run: |
-          set -e
-          actual="$(pnpm store path --silent)"
-          echo "pnpm store path: ${actual}"
-          if [ ! -d "${actual}" ]; then
-            echo "Expected store path to exist on disk; cache save would fail"
+          required='${{ matrix.version }}'
+          actual="$(pnpm --version)"
+          echo "pnpm version: ${actual}"
+          if [ "${actual}" != "${required}" ]; then
+            echo "Expected pnpm version ${required}, but got ${actual}"
             exit 1
           fi
         shell: bash
 
-  run_install:
-    name: 'run_install (${{ matrix.run_install.name }})'
+  test_bin_dest_output:
+    name: 'Test bin_dest output points to requested version (${{ matrix.version }}, ${{ matrix.os }})'
+    # Regression test for #247: invoking pnpm via the `bin_dest` output returned the
+    # bootstrap version because self-update writes the target to `${bin_dest}/bin/`,
+    # not directly into `${bin_dest}/`.
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
 
     strategy:
       fail-fast: false
       matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        version:
+          - '9.15.5'
+          - '10.33.2'
+
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - id: pnpm
+        name: Run the action
+        uses: ./
+        with:
+          version: ${{ matrix.version }}
+
+      - name: 'Test: bin_dest/pnpm reports requested version'
+        # Pass paths via env, not template interpolation, so Windows
+        # backslashes in `bin_dest` aren't eaten by bash's escape handling.
+        env:
+          BIN_DEST: ${{ steps.pnpm.outputs.bin_dest }}
+          REQUIRED: ${{ matrix.version }}
+        run: |
+          actual="$("$BIN_DEST/pnpm" --version)"
+          echo "pnpm version via bin_dest: ${actual}"
+          if [ "${actual}" != "${REQUIRED}" ]; then
+            echo "Expected pnpm version ${REQUIRED}, but got ${actual}"
+            exit 1
+          fi
+        shell: bash
+
+  test_package_manager_field:
+    name: 'Test packageManager field is respected (${{ matrix.version }}, ${{ matrix.os }})'
+    # Reproduces #227: when `packageManager` is set in package.json and no `version:` input is given,
+    # the action should install the version specified there.
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        version:
+          - '9.15.5'
+          - '10.33.0'
+
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - name: Set up package.json with packageManager field
+        run: echo '{"packageManager":"pnpm@${{ matrix.version }}"}' > package.json
+        shell: bash
+
+      - name: Run the action
+        uses: ./
+
+      - name: 'Test: exact version installed'
+        run: |
+          required='${{ matrix.version }}'
+          actual="$(pnpm --version)"
+          echo "pnpm version: ${actual}"
+          if [ "${actual}" != "${required}" ]; then
+            echo "Expected pnpm version ${required}, but got ${actual}"
+            exit 1
+          fi
+        shell: bash
+
+  test_dev_engines:
+    name: Test with devEngines.packageManager
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        version:
+          - '9.15.5'
+          - '>=9.15.0'
+
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - name: Set up package.json with devEngines.packageManager
+        run: echo '{"devEngines":{"packageManager":{"name":"pnpm","version":"${{ matrix.version }}","onFail":"download"}}}' > package.json
+        shell: bash
+
+      - name: Run the action
+        uses: ./
+
+      - name: 'Test: which'
+        run: which pnpm; which pnpx
+
+      - name: 'Test: version'
+        run: |
+          set -e
+          required='${{ matrix.version }}'
+          actual="$(pnpm --version)"
+          echo "pnpm version: ${actual}"
+
+          if [ "${required}" = ">=9.15.0" ]; then
+            min="9.15.0"
+            if [ "$(printf '%s\n' "${min}" "${actual}" | sort -V | head -n1)" != "${min}" ]; then
+              echo "Expected pnpm version >= ${min}, but got ${actual}"
+              exit 1
+            fi
+          else
+            if [ "${actual}" != "${required}" ]; then
+              echo "Expected pnpm version ${required}, but got ${actual}"
+              exit 1
+            fi
+          fi
+        shell: bash
+
+  test_run_install:
+    name: 'Test with run_install (${{ matrix.run_install.name }}, ${{ matrix.os }})'
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        pnpm:
+          - 9.15.5
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
         run_install:
           - name: 'null'
             value: 'null'
@@ -270,14 +332,15 @@ jobs:
           version: 9.15.5
           run_install: ${{ matrix.run_install.value }}
 
-      - name: 'Test: pnpm works'
+      - name: 'Test: which'
+        run: which pnpm; which pnpx
+
+      - name: 'Test: version'
         run: |
-          set -e
-          which pnpm
-          which pnpx
           actual="$(pnpm --version)"
-          if [ "${actual}" != "9.15.5" ]; then
-            echo "Expected 9.15.5, got ${actual}"
+          echo "pnpm version: ${actual}"
+          if [[ ! "${actual}" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-.+)?$ ]]; then
+            echo "ERROR: pnpm --version did not produce valid output"
             exit 1
           fi
         shell: bash

src/index.ts

@@ -8,16 +8,16 @@ import pnpmInstall from './pnpm-install'
 import pruneStore from './pnpm-store-prune'
 
 async function main() {
+  const inputs = getInputs()
+
   if (getState('is_post') === 'true') {
-    await runPost()
+    await runPost(inputs)
   } else {
-    await runMain()
+    await runMain(inputs)
   }
 }
 
-async function runMain() {
-  const inputs = getInputs()
-  saveState('inputs', inputs)
+async function runMain(inputs: Inputs) {
   saveState('is_post', 'true')
 
   const binDest = await installPnpm(inputs)
@@ -30,8 +30,7 @@ async function runMain() {
   pnpmInstall(inputs)
 }
 
-async function runPost() {
-  const inputs = JSON.parse(getState('inputs')) as Inputs
+async function runPost(inputs: Inputs) {
   pruneStore(inputs)
   await saveCache(inputs)
 }

src/install-pnpm/run.ts

@@ -84,31 +84,32 @@ export async function runSelfInstaller(inputs: Inputs): Promise<SelfInstallerRes
     ? path.join(dest, 'node_modules', '@pnpm', 'exe', process.platform === 'win32' ? 'pnpm.exe' : 'pnpm')
     : path.join(dest, 'node_modules', 'pnpm', 'bin', 'pnpm.mjs')
 
-  // Self-update the bootstrap to the requested pnpm version. readTargetVersion
-  // either returns a value or throws, so this always runs.
+  // Determine the target version
   const targetVersion = readTargetVersion({ version, packageJsonFile })
-  const cmd = standalone ? bootstrapPnpm : process.execPath
-  const args = standalone ? ['self-update', targetVersion] : [bootstrapPnpm, 'self-update', targetVersion]
-  const exitCode = await runCommand(cmd, args, { cwd: dest })
-  if (exitCode !== 0) {
-    return { exitCode, binDest: pnpmHome }
+
+  if (targetVersion) {
+    const cmd = standalone ? bootstrapPnpm : process.execPath
+    const args = standalone ? ['self-update', targetVersion] : [bootstrapPnpm, 'self-update', targetVersion]
+    const exitCode = await runCommand(cmd, args, { cwd: dest })
+    if (exitCode !== 0) {
+      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.
+    // `${steps.pnpm.outputs.bin_dest}/pnpm`) invoke the requested version.
+    return { exitCode: 0, binDest: path.join(pnpmHome, 'bin') }
   }
-  // self-update writes the target pnpm/pnpx into PNPM_HOME/bin, leaving
-  // the bootstrap symlinks in pnpmHome pointing at the old version. Use
-  // PNPM_HOME/bin so consumers of the bin_dest output (e.g.
-  // `${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 : pnpmHome }
+
+  // No explicit target version: rely on the bootstrap pnpm to switch to
+  // the version declared in packageManager/devEngines at runtime.
+  return { exitCode: 0, binDest: pnpmHome }
 }
 
 function readTargetVersion(opts: {
   readonly version?: string | undefined
   readonly packageJsonFile: string
-}): string {
+}): string | undefined {
   const { version, packageJsonFile } = opts
   const { GITHUB_WORKSPACE } = process.env
 
@@ -129,15 +130,12 @@ function readTargetVersion(opts: {
     }
   }
 
-  // packageManager is always exact `pnpm@<version>[+<integrity>]` per spec.
-  // Strip the integrity hash for self-update.
-  const packageManagerVersion =
-    typeof packageManager === 'string' && packageManager.startsWith('pnpm@')
-      ? packageManager.slice('pnpm@'.length).split('+')[0]
-      : undefined
-
   if (version) {
-    if (packageManagerVersion && packageManagerVersion !== version) {
+    if (
+      typeof packageManager === 'string' &&
+      packageManager.startsWith('pnpm@') &&
+      packageManager.replace('pnpm@', '') !== version
+    ) {
       throw new Error(`Multiple versions of pnpm specified:
   - version ${version} in the GitHub Action config with the key "version"
   - version ${packageManager} in the package.json with the key "packageManager"
@@ -147,22 +145,13 @@ Remove one of these versions to avoid version mismatch errors like ERR_PNPM_BAD_
     return version
   }
 
-  // Self-update the bootstrap pnpm to the version pinned in package.json so
-  // PATH-resolved `pnpm` (and the bin_dest output) reflect the target
-  // version. Without this, `pnpm store path` runs as the bootstrap and
-  // reports a different STORE_VERSION than the one the user's actual
-  // install writes to — breaking cache: true and actions/setup-node's
-  // `cache: pnpm` on cold caches (issue #233).
-  //
-  // devEngines.packageManager takes priority over packageManager, matching
-  // pnpm's getWantedPackageManager logic. `pnpm self-update` accepts both
-  // exact versions and semver ranges, so we pass either through directly.
-  if (devEngines?.packageManager?.name === 'pnpm' && devEngines.packageManager.version) {
-    return devEngines.packageManager.version
+  // pnpm will automatically download and switch to the right version
+  if (typeof packageManager === 'string' && packageManager.startsWith('pnpm@')) {
+    return undefined
   }
 
-  if (packageManagerVersion) {
-    return packageManagerVersion
+  if (devEngines?.packageManager?.name === 'pnpm' && devEngines.packageManager.version) {
+    return undefined
   }
 
   if (!GITHUB_WORKSPACE) {