name: Query help preview

on:
  pull_request:
    branches: [main]
    paths:
      - "**/*.qhelp"

jobs:
  qhelp:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 2
      - name: Determine changed files
        id: changes
        run: |
          echo -n "::set-output name=qhelp_files::"
          (git diff --name-only --diff-filter=ACMRT HEAD~1 HEAD | grep .qhelp$ | grep -v .inc.qhelp;
           git diff --name-only --diff-filter=ACMRT HEAD~1 HEAD | grep .inc.qhelp$ | xargs -d '\n' -rn1 basename | xargs -d '\n' -rn1 git grep -l) |
           sort -u | xargs -d '\n' -n1 printf "'%s' "

      - name: Fetch CodeQL
        run: |
          LATEST=$(gh release list --repo https://github.com/github/codeql-cli-binaries | cut -f 1 | grep -v beta | sort --version-sort | tail -1)
          gh release download --repo https://github.com/github/codeql-cli-binaries --pattern codeql-linux64.zip "$LATEST"
          unzip -q codeql-linux64.zip
        env:
          GITHUB_TOKEN: ${{ github.token }}
      - name: QHelp preview
        if: ${{ steps.changes.outputs.qhelp_files }}
        run: |
          ( echo "QHelp previews:";
          for path in ${{ steps.changes.outputs.qhelp_files }} ; do
            echo "<details> <summary>${path}</summary>"
            echo
            codeql/codeql generate query-help --format=markdown ${path}
            echo "</details>"
          done) | gh pr comment "${{ github.event.pull_request.number }}" -F -
        env:
          GITHUB_TOKEN: ${{ github.token }}