dependabot-automerge-js.yml

# This action automatically merges dependabot PRs that update javascript dependencies (only patch updates).
# Based on: https://docs.github.com/en/code-security/supply-chain-security/keeping-your-dependencies-updated-automatically/automating-dependabot-with-github-actions#enable-auto-merge-on-a-pull-request

name: Dependabot auto-merge
on:
  pull_request:
    # Run this action when dependabot labels the PR, we care about the 'javascript' label.
    types: [labeled]

permissions:
  pull-requests: write
  contents: write

jobs:
  dependabot-js:
    runs-on: ubuntu-latest
    if: ${{ github.actor == 'dependabot[bot]' && contains(github.event.pull_request.labels.*.name, 'javascript') }}
    steps:
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@v2.2.0
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"

      - name: Approve PR
        # Approve only patch and minor updates
        if: ${{ steps.metadata.outputs.update-type != 'version-update:semver-major' }}
        run: gh pr review --approve "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Enable auto-merge for Dependabot PRs
        # Enable auto-merging only for patch updates
        if: ${{ steps.metadata.outputs.update-type == 'version-update:semver-patch' }}
        run: gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}