update-summary-buttons.yml

name: Update Summary Buttons

on:
  push:
    branches:
      - main
    paths:
      - '_includes/summary-buttons.md'
      - '**/summary*.md'
  pull_request:
    branches:
      - main
    paths:
      - '_includes/summary-buttons.md'
      - '**/summary*.md'
  workflow_dispatch:

permissions:
  contents: write

jobs:
  update-buttons:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Determine diff range
        id: diff-range
        run: |
          BEFORE_SHA="${{ github.event.before }}"
          AFTER_SHA="${{ github.sha }}"

          if [ -z "$BEFORE_SHA" ]; then
            BEFORE_SHA="$(git rev-list --max-parents=0 HEAD)"
          fi

          echo "before_sha=$BEFORE_SHA" >> "$GITHUB_OUTPUT"
          echo "after_sha=$AFTER_SHA" >> "$GITHUB_OUTPUT"

      - uses: actions/setup-node@v4
        with:
          node-version: '20'

      - run: npm ci

      - name: Replace buttons
        env:
          BEFORE_SHA: ${{ steps.diff-range.outputs.before_sha }}
          AFTER_SHA: ${{ steps.diff-range.outputs.after_sha }}
        run: |
          TEMPLATE_CHANGED=$(git diff --name-only "$BEFORE_SHA" "$AFTER_SHA" -- '_includes/summary-buttons.md' | wc -l | tr -d '[:space:]')

          mapfile -t FILES < <(git diff --name-only "$BEFORE_SHA" "$AFTER_SHA" -- '**/summary*.md')

          if [ "${#FILES[@]}" -eq 0 ] && [ "$TEMPLATE_CHANGED" -eq 0 ]; then
            echo "No changed summaries or template; skipping."
            exit 0
          fi

          echo "Template changed: $TEMPLATE_CHANGED"
          printf 'Changed summary files:\n%s\n' "${FILES[@]}"

          node scripts/replace-buttons.mjs "$TEMPLATE_CHANGED" "${FILES[@]}"

      - name: Commit & Push if changed
        run: |
          if [ -n "$(git status --porcelain)" ]; then
            if git log -1 --pretty=%an | grep -q "github-actions"; then
              exit 0
            fi
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            git add -A
            git commit -m "chore: update summary action buttons"
            git push
          fi