auto-merge-dependabot-workflow.yaml

name: Auto approve and merge PRs by dependabot

# Trigger the workflow on pull request
on: pull_request

permissions:
  pull-requests: write
  contents: write

jobs:
  auto-approve:
    name: Automatically approve dependabot PRs
    runs-on: ubuntu-latest
    env:
      is_bot1: ${{ github.actor == 'dependabot[bot]' }}
      is_bot2: ${{ github.actor == 'dependabot-preview[bot]' }}
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@0080882f6c36860b6ba35c610c98ce87d4e2f26f # v2.10.2
        with:
          disable-sudo: true
          egress-policy: audit
          disable-telemetry: false
          allowed-endpoints: >
            api.github.com:443
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@dbb049abf0d677abbd7f7eee0375145b417fdd34 # v2.2.0
        with:
          skip-verification: true
        if: ${{ github.actor == 'dependabot[bot]' || github.actor == 'dependabot-preview[bot]' }}
        continue-on-error: true
      - name: Auto approve patch and minor
        env:
          is_patch: ${{ steps.metadata.outputs.update-type == 'version-update:semver-patch' }}
          is_minor: ${{ steps.metadata.outputs.update-type == 'version-update:semver-minor' }}
        if: ${{ (env.is_patch || env.is_minor) && (env.is_bot1 || env.is_bot2) }}
        uses: hmarr/auto-approve-action@f0939ea97e9205ef24d872e76833fa908a770363 # v4.0.0
        # Perform the auto-approve action only when the PR is raised by dependabot and is a minor or patch
        with:
          # Create a personal access token and store it under the Secrets section of the particular repository
          # with the key "DEPENDABOT_ACTIONS_TOKEN"
          github-token: ${{ secrets.DEPENDABOT_ACTIONS_SECRET }}
        continue-on-error: true
      - name: Auto merge
        uses: pascalgn/automerge-action@7961b8b5eec56cc088c140b56d864285eabd3f67 # v0.16.4
        # Perform the auto-merge action only when the PR is raised by dependabot for patch or minor
        if: ${{ (env.is_patch || env.is_minor) && (env.is_bot1 || env.is_bot2) }}
        env:
          GITHUB_TOKEN: ${{ secrets.DEPENDABOT_ACTIONS_SECRET }}
          # Whenever dependabot raises a PR, it automatically assigns a label named "dependencies"
          # Merges those PRs labelled "dependencies" only
          MERGE_LABELS: dependencies
          MERGE_METHOD: rebase
        continue-on-error: true