comment-on-asciidoc-changes.yml

name: Comment on PR for .asciidoc changes

on:
  workflow_call: ~

jobs:
  comment-on-asciidoc-change:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout the repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # This is important to fetch all history

      - name: Check for changes in .asciidoc files
        id: check-files
        run: |
          git fetch origin ${{ github.base_ref }}
          if git diff --name-only origin/${{ github.base_ref }}..HEAD | grep -E '\.asciidoc$'; then
            echo "asciidoc_changed=true" >> $GITHUB_OUTPUT
          else
            echo "asciidoc_changed=false" >> $GITHUB_OUTPUT
          fi
      - name: Add a comment if .asciidoc files changed
        if: steps.check-files.outputs.asciidoc_changed == 'true'
        uses: actions/github-script@v6
        with:
          script: |
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.payload.pull_request.number,
              body: 'It looks like this PR modifies one or more `.asciidoc` files. The documentation is currently under a documentation freeze. Please do not merge this PR. See the [migration guide](https://elastic.github.io/docs-builder/migration/index.html) to learn more.'
            })