name: Comment on updated submodule

on:
  pull_request_target:
    paths:
      - "src/generated_versions_list.zig"
      - ".github/workflows/on-submodule-update.yml"

jobs:
  comment:
    name: Comment
    runs-on: ubuntu-latest
    if: ${{ github.repository_owner == 'oven-sh' }}
    permissions:
      contents: read
      pull-requests: write
      issues: write
    steps:
      - name: Checkout current
        uses: actions/checkout@v4
        with:
          sparse-checkout: |
            src
      - name: Hash generated versions list
        id: hash
        run: |
          echo "hash=$(sha256sum src/generated_versions_list.zig |  cut -d ' ' -f 1)" >> $GITHUB_OUTPUT
      - name: Checkout base
        uses: actions/checkout@v4
        with:
          ref: ${{ github.base_ref }}
          sparse-checkout: |
            src
      - name: Hash base
        id: base
        run: |
          echo "base=$(sha256sum src/generated_versions_list.zig |  cut -d ' ' -f 1)" >> $GITHUB_OUTPUT
      - name: Compare
        id: compare
        run: |
          if [ "${{ steps.hash.outputs.hash }}" != "${{ steps.base.outputs.base }}" ]; then
            echo "changed=true" >> $GITHUB_OUTPUT
          else
            echo "changed=false" >> $GITHUB_OUTPUT
          fi
      - name: Find Comment
        id: comment
        uses: peter-evans/find-comment@v3
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: github-actions[bot]
          body-includes: <!-- generated-comment submodule-updated -->
      - name: Write Warning Comment
        uses: peter-evans/create-or-update-comment@v4
        if: steps.compare.outputs.changed == 'true'
        with:
          comment-id: ${{ steps.comment.outputs.comment-id }}
          issue-number: ${{ github.event.pull_request.number }}
          edit-mode: replace
          body: |
            ⚠️ **Warning:** @${{ github.actor }}, this PR has changes to submodule versions. 

            If this change was intentional, please ignore this message. If not, please undo changes to submodules and rebase your branch.

            <!-- generated-comment submodule-updated -->
      - name: Add labels
        uses: actions-cool/issues-helper@v3
        if: steps.compare.outputs.changed == 'true'
        with:
          actions: "add-labels"
          token: ${{ secrets.GITHUB_TOKEN }}
          issue-number: ${{ github.event.pull_request.number }}
          labels: "changed-submodules"
      - name: Remove labels
        uses: actions-cool/issues-helper@v3
        if: steps.compare.outputs.changed == 'false'
        with:
          actions: "remove-labels"
          token: ${{ secrets.GITHUB_TOKEN }}
          issue-number: ${{ github.event.pull_request.number }}
          labels: "changed-submodules"
      - name: Delete outdated comment
        uses: actions-cool/issues-helper@v3
        if: steps.compare.outputs.changed == 'false' && steps.comment.outputs.comment-id != ''
        with:
          actions: "delete-comment"
          token: ${{ secrets.GITHUB_TOKEN }}
          issue-number: ${{ github.event.pull_request.number }}
          comment-id: ${{ steps.comment.outputs.comment-id }}