dependabot-auto-merge.yml

name: Dependabot auto-merge
on:
  pull_request_target:
    types:
      - opened
      - synchronize

  workflow_run:
    workflows: ['*', '!changelog']
    types:
      - completed

permissions:
  pull-requests: write
  contents: write

jobs:
  dependabot:
    runs-on: ubuntu-latest
    if: |
      github.event.pull_request.user.login == 'dependabot[bot]' &&
      (github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' || github.event.workflow_run.conclusion == 'neutral')
    steps:
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@v2
        with:
          github-token: '${{ secrets.GITHUB_TOKEN }}'
      - name: Enable auto-merge for Dependabot PRs
        if: ${{ steps.metadata.outputs.update-type != 'version-update:semver-major' }}
        uses: actions/github-script@v7
        with:
          github-token: '${{ secrets.GITHUB_TOKEN }}'
          script: |
            const getPullRequestIdQuery = `query GetPullRequestId($owner: String!, $repo: String!, $pullRequestNumber: Int!) {
              repository(owner: $owner, name: $repo) {
                pullRequest(number: $pullRequestNumber) {
                  id
                }
              }
            }`

            const repoInfo = {
              owner: context.repo.owner,
              repo: context.repo.repo,
              pullRequestNumber: context.issue.number,
            }

            const response = await github.graphql(getPullRequestIdQuery, repoInfo)

            await github.rest.pulls.createReview({
              pull_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              event: 'APPROVE',
            })

            const enableAutoMergeQuery = `mutation ($pullRequestId: ID!, $mergeMethod: PullRequestMergeMethod!) {
              enablePullRequestAutoMerge(input: {
                pullRequestId: $pullRequestId,
                mergeMethod: $mergeMethod
              }) {
                pullRequest {
                  autoMergeRequest {
                    enabledAt
                    enabledBy {
                      login
                    }
                  }
                }
              }
            }`

            const data = {
              pullRequestId: response.repository.pullRequest.id,
              mergeMethod: 'SQUASH',
            }

            try {
              await github.graphql(enableAutoMergeQuery, data)
            } catch (error) {
              console.error('Error enabling auto-merge:', error)
            }