Ericson2314 self-nominate #38
Workflow file for this run
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| name: "Email updates" | |
| on: | |
| pull_request_target: | |
| jobs: | |
| automerge: | |
| name: Automerge | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: actions/create-github-app-token@v1 | |
| id: app-token | |
| with: | |
| app-id: ${{ vars.APP_ID }} | |
| private-key: ${{ secrets.PRIVATE_KEY }} | |
| - uses: actions/checkout@v4 | |
| with: | |
| # pull_request_target checks out the base branch by default | |
| ref: refs/pull/${{ github.event.pull_request.number }}/merge | |
| fetch-depth: 0 | |
| - name: Automerge if verified email update | |
| run: | | |
| # Because we fetch a merge commit, HEAD has two parents: | |
| # HEAD^1 is the last commit of the base branch | |
| base=$(git rev-parse HEAD^1) | |
| # HEAD^2 is the PRs head commit | |
| head=$(git rev-parse HEAD^2) | |
| # To be able to check the diff of the PR, we can't just compare base to head, | |
| # because that would give differences when the base branch gets new commits. | |
| # Instead, the merge base is what we need here, | |
| # this is also what the `git diff base...head` syntax does | |
| from=$(git merge-base "$base" "$head") | |
| to=$head | |
| # All files changed by the PR | |
| changedFiles=$(git diff "$from" "$to" --name-only) | |
| if [[ "$changedFiles" != "voters.json" ]]; then | |
| echo "PR has non-voters.json changes, can't automerge" | |
| exit 0 | |
| fi | |
| # The voters.json file for a specific ref but without the PR author's entry | |
| withoutAuthor() { | |
| # Get voters.json for a specific ref | |
| git show "$1":voters.json | | |
| # Only keep non-author entries | |
| jq --argjson id "$AUTHOR_ID" 'with_entries(select(.value != $id))' | |
| } | |
| # Ensure that all non-author voters.json entries are the same before and after the PR | |
| if [[ "$(withoutAuthor "$from")" != "$(withoutAuthor "$to")" ]]; then | |
| echo "PR has non-PR-author changes to voters.json, can't automerge" | |
| exit 0 | |
| fi | |
| # Merge the pull request, notably passing the sha we checked here, | |
| # to make sure it can't be updated while we're not looking | |
| gh api \ | |
| --method PUT \ | |
| -H "Accept: application/vnd.github+json" \ | |
| -H "X-GitHub-Api-Version: 2022-11-28" \ | |
| "/repos/$REPOSITORY/pulls/$PR_NUMBER/merge" \ | |
| -f "sha=$to" | |
| gh api \ | |
| --method POST \ | |
| -H "Accept: application/vnd.github+json" \ | |
| -H "X-GitHub-Api-Version: 2022-11-28" \ | |
| "/repos/$REPOSITORY/issues/$PR_NUMBER/comments" \ | |
| -f "body=Automerged because this PR only changes the PR authors \`voters.json\` entry" | |
| env: | |
| GH_TOKEN: ${{ steps.app-token.outputs.token }} | |
| REPOSITORY: ${{ github.repository }} | |
| PR_NUMBER: ${{ github.event.pull_request.number }} | |
| AUTHOR_ID: ${{ github.event.pull_request.user.id }} |