lint.yaml

name: Lint

on:
  pull_request:

env:
  GIT_USERNAME: ${{ github.actor }}
  GIT_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
  FIX_COMMIT_MESSAGE: Fixed /hook_tools/lint.py lints

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.head_ref }}
          fetch-depth: 0
          submodules: true

      - name: Pull container
        run: ./utils/lint --only-pull-image

      - name: Lint
        run: |
          git show ${{ github.event.pull_request.head.sha }} --format=%s --no-patch --no-color

          if [[ "$(git show ${{ github.event.pull_request.head.sha }} --format=%s --no-patch --no-color)" == "${{ env.FIX_COMMIT_MESSAGE }}" ]]; then
            # The previous commit is a lint-fix commit, do not attempt to
            # re-run the linter.
            ./utils/lint \
              --command-name="utils/lint" \
              --diagnostics-output=github \
              validate --all
            exit 0
          fi

          ./utils/lint \
            --command-name="utils/lint" \
            --diagnostics-output=github \
            fix --all && exit 0 || true

          # The linter was able to find some fixable things.

          # Authenticate with GitHub.
          git config --global user.name "${{ env.GIT_USERNAME }}"
          git config --global user.email "${{ env.GIT_USERNAME }}@users.noreply.github.com"
          cat <<- EOF > $HOME/.netrc
          machine github.com
          login ${{ env.GIT_USERNAME }}
          password ${{ env.GIT_PASSWORD }}
          machine api.github.com
          login ${{ env.GIT_USERNAME }}
          password ${{ env.GIT_PASSWORD }}
          EOF
          chmod 600 $HOME/.netrc

          # Now push that commit to the source branch.
          git commit -am "${{ env.FIX_COMMIT_MESSAGE }}"
          git push origin HEAD:${{ github.head_ref }}