name: Update Contributors # Refresh contrib.rocks image cache

on:
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  refresh-contrib-cache:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Bump cacheBust in all README files
        run: |
          set -euo pipefail
          TS="$(date +%s)"
          # Target only the root README.md and localized READMEs under locales/*/README.md
          mapfile -t FILES < <(git ls-files README.md 'locales/*/README.md' || true)

          if [ "${#FILES[@]}" -eq 0 ]; then
            echo "No target README files found." >&2
            exit 1
          fi

          UPDATED=0
          for f in "${FILES[@]}"; do
            if grep -q 'cacheBust=' "$f"; then
              # Use portable sed in GNU environment of ubuntu-latest
              sed -i -E "s/cacheBust=[0-9]+/cacheBust=${TS}/g" "$f"
              echo "Updated cacheBust in $f"
              UPDATED=1
            else
              echo "Warning: cacheBust parameter not found in $f" >&2
            fi
          done

          if [ "$UPDATED" -eq 0 ]; then
            echo "No files were updated. Ensure READMEs embed contrib.rocks with cacheBust param." >&2
            exit 1
          fi

      - name: Detect changes
        id: changes
        run: |
          if git diff --quiet; then
            echo "changed=false" >> $GITHUB_OUTPUT
          else
            echo "changed=true" >> $GITHUB_OUTPUT
          fi

      - name: Create Pull Request
        if: steps.changes.outputs.changed == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "docs: update contributors list [skip ci]"
          committer: "github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>"
          branch: refresh-contrib-cache
          delete-branch: true
          title: "Refresh contrib.rocks image cache (all READMEs)"
          body: |
            Automated refresh of the contrib.rocks image cache by bumping the cacheBust parameter in README.md and locales/*/README.md.
          base: main