imgc/.github/workflows/dependabot-auto-merge.yml at 99eb8befb9e605b84a75a62ed55f3473e461f0bd · cvele/imgc · GitHub

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# Auto-merge Dependabot PRs for minor and patch updates
# This workflow automatically merges Dependabot PRs after tests pass
# Only applies to minor/patch updates, not major version changes

name: Dependabot Auto-Merge

on:
  pull_request:
    types: [opened, synchronize, reopened]

permissions:
  contents: write
  pull-requests: write
  checks: read

jobs:
  dependabot:
    runs-on: ubuntu-latest
    if: github.actor == 'dependabot[bot]'
    steps:
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@v2
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"

      - name: Wait for tests to complete
        uses: fountainhead/action-wait-for-check@v1.2.0
        id: wait-for-tests
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          checkName: "Test Build (ubuntu-latest)"  # Wait for at least one platform to complete
          ref: ${{ github.event.pull_request.head.sha }}
          timeoutSeconds: 1200  # Wait up to 20 minutes
          intervalSeconds: 30

      - name: Auto-merge minor and patch updates
        if: |
          steps.wait-for-tests.outputs.conclusion == 'success' &&
          (steps.metadata.outputs.update-type == 'version-update:semver-minor' ||
           steps.metadata.outputs.update-type == 'version-update:semver-patch')
        run: |
          echo "Auto-merging ${{ steps.metadata.outputs.dependency-names }} update"
          gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Comment on major updates
        if: |
          steps.metadata.outputs.update-type == 'version-update:semver-major'
        uses: actions/github-script@v8
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `🚨 **Major version update detected for ${{ steps.metadata.outputs.dependency-names }}**

              This PR updates a dependency to a new major version, which may include breaking changes.
              Please review the changelog and test thoroughly before merging.

              **Update type:** ${{ steps.metadata.outputs.update-type }}
              **From version:** ${{ steps.metadata.outputs.previous-version }}
              **To version:** ${{ steps.metadata.outputs.new-version }}

              This PR will **not** be auto-merged and requires manual review.`
            })

      - name: Auto-approve minor/patch updates
        if: |
          steps.wait-for-tests.outputs.conclusion == 'success' &&
          (steps.metadata.outputs.update-type == 'version-update:semver-minor' ||
           steps.metadata.outputs.update-type == 'version-update:semver-patch')
        run: |
          gh pr review --approve "$PR_URL"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

# Workflow behavior:
#
# 1. Triggers only on Dependabot PRs
# 2. Waits for the main test workflow to complete
# 3. For minor/patch updates:
#    - Auto-approves if tests pass
#    - Auto-merges using squash merge
# 4. For major updates:
#    - Adds a comment explaining the risk
#    - Requires manual review and merge
# 5. Security updates are handled normally by Dependabot
#
# Benefits:
# - Reduces maintenance overhead
# - Ensures tests pass before merging
# - Maintains safety for breaking changes
# - Keeps dependencies up to date automatically