feat: initial version of the pnpm/update action

README.md

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+# pnpm/update
+
+Updates the dependencies of your project with `pnpm update`, optionally bumps
+the pinned pnpm (`packageManager` / `devEngines.packageManager`) and Node.js
+(`devEngines.runtime`) versions, and opens a pull request with the result.
+
+Unlike external dependency bots, this action runs pnpm itself, so it supports
+every feature of your workspace: catalogs, patched dependencies, config
+dependencies, overrides, and anything pnpm learns in the future.
+
+The action expects pnpm (and a runtime, if your project needs one for
+verification) to already be set up — pair it with [`pnpm/setup`].
+
+## Usage
+
+```yaml
+name: Update Dependencies
+
+on:
+  schedule:
+    - cron: '0 0 * * 1' # Every Monday at midnight UTC
+  workflow_dispatch: {}
+
+permissions:
+  contents: write
+  pull-requests: write
+
+concurrency:
+  group: update-dependencies
+  cancel-in-progress: false
+
+jobs:
+  update-dependencies:
+    if: github.repository == 'your-org/your-repo' # Don't run on forks
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+      # Installs the pnpm version from `packageManager` and the runtime
+      # from `devEngines.runtime`.
+      - uses: pnpm/setup@v1
+      - uses: pnpm/update@v0
+        with:
+          node: 24
+          verify: |
+            pnpm build
+            pnpm test
+```
+
+[`pnpm/setup`]: https://github.com/pnpm/setup
+
+## Inputs
+
+| Input | Default | Description |
+|---|---|---|
+| `token` | `github.token` | Token used to push the branch and create the PR. PRs created with the default `GITHUB_TOKEN` don't trigger other workflows; pass a GitHub App token or PAT if you want CI to run on the PR. |
+| `branch` | `chore/update-dependencies` | Branch the updates are pushed to (force-pushed on every run, so at most one update PR stays open). |
+| `base` | repository default branch | Branch the updates are based on and the pull request targets. |
+| `latest` | `true` | Update to the latest versions, ignoring `package.json` ranges. Set to `false` to update within ranges. |
+| `exclude` | — | Whitespace-separated package name patterns that should not be updated, e.g. `typescript @types/*`. |
+| `update-pnpm` | `latest` | Bump pnpm itself via `pnpm self-update`. A dist-tag or exact version, or `false` to skip. |
+| `node` | — | Bump the Node.js version pinned in `devEngines.runtime` to the latest release of this major, e.g. `24`. Empty to skip. |
+| `verify` | — | Shell commands run after updating (build, tests). If they fail, no PR is created. |
+| `commit-message` | `chore: update dependencies` | Message of the update commit. |
+| `pr-title` | `chore: update dependencies` | Title of the pull request. |
+| `pr-body` | Automated dependency updates… | Body of the pull request. |

action.yml

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+name: 'pnpm update'
+description: 'Update dependencies (and optionally pnpm and the runtime) with pnpm, then open a pull request'
+branding:
+  icon: 'refresh-cw'
+  color: 'orange'
+inputs:
+  token:
+    description: >-
+      Token used to push the update branch and create the pull request.
+      Pull requests created with the default GITHUB_TOKEN do not trigger other
+      workflows; pass a GitHub App token or PAT if you want CI to run on the PR.
+    default: ${{ github.token }}
+  branch:
+    description: >-
+      Branch the updates are pushed to. It is force-pushed on every run, so at
+      most one update PR stays open at a time.
+    default: 'chore/update-dependencies'
+  base:
+    description: 'Branch the updates are based on and the pull request targets.'
+    default: ${{ github.event.repository.default_branch }}
+  latest:
+    description: >-
+      Update dependencies to their latest versions, ignoring the ranges
+      declared in package.json. Set to "false" to update within ranges.
+    default: 'true'
+  exclude:
+    description: >-
+      Whitespace-separated package name patterns that should not be updated.
+      Example: "typescript @types/*"
+    default: ''
+  update-pnpm:
+    description: >-
+      Update pnpm itself (packageManager and devEngines.packageManager) with
+      `pnpm self-update`. Set to a dist-tag or exact version, or "false" to skip.
+    default: 'latest'
+  node:
+    description: >-
+      Update the Node.js version pinned in devEngines.runtime to the latest
+      release of this major version, e.g. "24". Empty to skip.
+    default: ''
+  verify:
+    description: >-
+      Shell commands run after updating (e.g. build and tests). If they fail,
+      no pull request is created.
+    default: ''
+  commit-message:
+    description: 'Message of the update commit.'
+    default: 'chore: update dependencies'
+  pr-title:
+    description: 'Title of the pull request.'
+    default: 'chore: update dependencies'
+  pr-body:
+    description: 'Body of the pull request.'
+    default: 'Automated dependency updates generated with `pnpm update`.'
+runs:
+  using: 'composite'
+  steps:
+    - name: Prepare the update branch
+      shell: bash
+      env:
+        BRANCH: ${{ inputs.branch }}
+        BASE: ${{ inputs.base }}
+      run: |
+        set -euo pipefail
+        git config user.name "github-actions[bot]"
+        git config user.email "github-actions[bot]@users.noreply.github.com"
+        # Base the update on the latest base branch, even when the workflow
+        # was dispatched from another ref or the checkout is shallow.
+        git fetch origin "$BASE"
+        git checkout -B "$BRANCH" FETCH_HEAD
+
+    - name: Update dependencies
+      shell: bash
+      env:
+        LATEST: ${{ inputs.latest }}
+        EXCLUDE: ${{ inputs.exclude }}
+        UPDATE_PNPM: ${{ inputs.update-pnpm }}
+        NODE_MAJOR: ${{ inputs.node }}
+      run: |
+        set -euo pipefail
+        # Keep patterns like "@types/*" from glob-expanding against the repo.
+        set -f
+
+        args=(--recursive)
+        if [ "$LATEST" = "true" ]; then
+          args+=(--latest)
+        fi
+        for pattern in $EXCLUDE; do
+          args+=("!$pattern")
+        done
+        pnpm update "${args[@]}"
+
+        if [ -n "$NODE_MAJOR" ]; then
+          pnpm runtime set node "$NODE_MAJOR"
+        fi
+
+        # Last, so every earlier step runs on the pnpm the workflow installed.
+        if [ "$UPDATE_PNPM" != "false" ]; then
+          pnpm self-update "$UPDATE_PNPM"
+        fi
+
+    - name: Verify the updated project
+      if: ${{ inputs.verify != '' }}
+      shell: bash
+      run: ${{ inputs.verify }}
+
+    - name: Commit, push, and create the pull request
+      shell: bash
+      env:
+        GH_TOKEN: ${{ inputs.token }}
+        BRANCH: ${{ inputs.branch }}
+        BASE: ${{ inputs.base }}
+        COMMIT_MESSAGE: ${{ inputs.commit-message }}
+        PR_TITLE: ${{ inputs.pr-title }}
+        PR_BODY: ${{ inputs.pr-body }}
+      run: |
+        set -euo pipefail
+
+        if [ -z "$(git status --porcelain)" ]; then
+          echo "Everything is up to date."
+          exit 0
+        fi
+
+        git add -A
+        git commit -m "$COMMIT_MESSAGE"
+
+        # Remove any credentials persisted by actions/checkout: they would
+        # take precedence over the token this action was given, silently
+        # downgrading a user-supplied PAT or App token to GITHUB_TOKEN.
+        git config --local --unset-all http.https://github.com/.extraheader || true
+        # Supply the token through a credential helper (it reads GH_TOKEN
+        # from the environment) so it never appears on a command line.
+        git -c credential.helper= \
+            -c credential.helper='!f() { echo username=x-access-token; echo "password=${GH_TOKEN}"; }; f' \
+            push --force origin "$BRANCH"
+
+        # A PR left open by a previous run already points at the branch we
+        # just force-pushed, so there is nothing more to do.
+        if [ -z "$(gh pr list --head "$BRANCH" --state open --json number --jq '.[].number')" ]; then
+          gh pr create \
+            --title "$PR_TITLE" \
+            --body "$PR_BODY" \
+            --base "$BASE" \
+            --head "$BRANCH"
+        fi