validate-blogpost.yml

#Run blogpost-checker in a Docker container to validate the new blogpost
name: validate-blogpost

on:
  pull_request_target:
    branches:
      - master

jobs:
  pull-and-run-blogpost-checker-image:
    runs-on: ubuntu-latest
    permissions:
      issues: write

    steps:
      - name: Inject env
        uses: rlespinasse/github-slug-action@v3.x

      - uses: actions/checkout@v2

      - name: git log
        run: |
          BASE_COMMIT=`git log --pretty="format:%H" | head -1`
          BRANCHNAME=`echo pr-${{github.event.number}}`
          git fetch origin pull/${{github.event.number}}/head:$BRANCHNAME
          git checkout $BRANCHNAME
          HEAD_COMMIT=`git log --pretty="format:%H" | head -1`
          export HEAD_COMMIT="$HEAD_COMMIT"
          export BASE_COMMIT="$BASE_COMMIT"
          echo "::set-env name=HEAD_COMMIT::$HEAD_COMMIT"
          echo "::set-env name=BASE_COMMIT::$BASE_COMMIT"
        env:
          ACTIONS_ALLOW_UNSECURE_COMMANDS: 'true'
        working-directory: /home/runner/work/devblog/devblog

      - uses: actions/checkout@v2
        with:
          repository: ${{ github.event.pull_request.user.login }}/${{ env.GITHUB_REPOSITORY_NAME_PART }}
          ref: ${{ env.HEAD_COMMIT }}
          fetch-depth: 0

      - name: Run Docker image
        run: |
          docker run \
          --env BASE_COMMIT='${{ env.BASE_COMMIT }}' \
          --env HEAD_COMMIT='${{ env.HEAD_COMMIT }}' \
          --env LOCAL_REPO_PATH=repo \
          --env PR_NUMBER='${{ github.event.number }}' \
          --env TOKEN='${{ secrets.REPOSITORY_LOCAL_USER_TOKEN }}' \
          -v /home/runner/work/devblog/devblog:/repo \
          jekyll2cms/blogpost-checker:1.2.1