commit-preview.yml

name: Commit Preview

on:
    workflow_run:
        workflows: ["PR Preview"]
        types:
            - completed

jobs:
    commit:
        runs-on: ubuntu-latest
        if: github.event.workflow_run.conclusion == 'success'
        permissions:
            contents: write
            pull-requests: write

        steps:
            - name: Download preview artifact
              uses: dawidd6/action-download-artifact@v7
              with:
                  run_id: ${{ github.event.workflow_run.id }}
                  name: preview-image
                  path: .

            - name: Download PR info artifact
              uses: dawidd6/action-download-artifact@v7
              with:
                  run_id: ${{ github.event.workflow_run.id }}
                  name: pr-info
                  path: .

            - name: Read PR info
              id: pr-info
              run: |
                  echo "pr_number=$(cat pr_number.txt)" >> $GITHUB_OUTPUT
                  echo "commit_sha=$(cat commit_sha.txt)" >> $GITHUB_OUTPUT
                  echo "new_themes=$(cat new_themes.txt)" >> $GITHUB_OUTPUT
                  echo "theme=$(cat theme.txt)" >> $GITHUB_OUTPUT

            - name: Setup preview branch
              run: |
                  # Configure git
                  git config --global user.name 'github-actions[bot]'
                  git config --global user.email 'github-actions[bot]@users.noreply.github.com'

                  # Create a temporary directory for git operations
                  mkdir -p temp_git
                  cd temp_git

                  REPO_URL="https://github.com/${{ github.repository }}.git"

                  # Clone only the preview branch, or create new if doesn't exist
                  if git ls-remote --heads $REPO_URL previews | grep -q 'refs/heads/previews'; then
                      git clone --branch previews --single-branch $REPO_URL .
                  else
                      git clone $REPO_URL .
                      git checkout --orphan previews
                      git rm -rf .
                      git clean -fxd
                  fi

                  # Setup the preview branch
                  mkdir -p previews

                  # Copy the new preview with PR number and commit SHA from parent directory
                  cp ../preview.png "previews/pr-${{ steps.pr-info.outputs.pr_number }}-${{ steps.pr-info.outputs.commit_sha }}.png"

                  # Commit and push
                  git add previews/
                  git commit -m "Update preview for PR #${{ steps.pr-info.outputs.pr_number }} commit ${{ steps.pr-info.outputs.commit_sha }}" || echo "No changes to commit"
                  git push https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git previews

            - name: Find Comment
              uses: peter-evans/find-comment@v3
              id: find-comment
              with:
                  issue-number: ${{ steps.pr-info.outputs.pr_number }}
                  comment-author: "github-actions[bot]"
                  body-includes: "### GitRoll Preview Cards"

            - name: Create comment body
              id: create-comment
              run: |
                  IMAGE_URL="https://raw.githubusercontent.com/${{ github.repository }}/previews/previews/pr-${{ steps.pr-info.outputs.pr_number }}-${{ steps.pr-info.outputs.commit_sha }}.png"

                  echo "body<<EOF" >> $GITHUB_OUTPUT
                  echo "### GitRoll Preview Cards" >> $GITHUB_OUTPUT
                  echo "" >> $GITHUB_OUTPUT
                  if [[ -n "${{ steps.pr-info.outputs.new_themes }}" ]]; then
                      echo "New theme(s) detected: \`${{ steps.pr-info.outputs.new_themes }}\`" >> $GITHUB_OUTPUT
                  else
                      echo "No new theme detected, using: \`${{ steps.pr-info.outputs.theme }}\`" >> $GITHUB_OUTPUT
                  fi
                  echo "" >> $GITHUB_OUTPUT
                  echo "![Preview Cards]($IMAGE_URL)" >> $GITHUB_OUTPUT
                  echo "" >> $GITHUB_OUTPUT
                  echo "These are preview cards showing possible ratings. Get your real score at [GitRoll.io](https://gitroll.io)" >> $GITHUB_OUTPUT
                  echo "EOF" >> $GITHUB_OUTPUT

            - name: Create or update comment
              uses: peter-evans/create-or-update-comment@v4
              with:
                  comment-id: ${{ steps.find-comment.outputs.comment-id }}
                  issue-number: ${{ steps.pr-info.outputs.pr_number }}
                  body: ${{ steps.create-comment.outputs.body }}
                  edit-mode: replace