name: Sync changed files to Google Drive

on:
  push:
    branches: [main]

jobs:
  sync:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Upload changed files
        env:
          BEFORE: ${{ gitea.event.before }}
          AFTER: ${{ gitea.event.after }}
          GDRIVE_FOLDER_ID: ${{ vars.GDRIVE_FOLDER_ID }}
          GDRIVE_SERVICE_ACCOUNT_JSON: ${{ secrets.GDRIVE_SERVICE_ACCOUNT_JSON }}
        run: |
          curl -fsSL https://rclone.org/install.sh | sudo bash
          key=$(mktemp)
          config=$(mktemp)
          trap 'rm -f "$key" "$config"' EXIT
          printf '%s' "$GDRIVE_SERVICE_ACCOUNT_JSON" > "$key"
          printf '[gdrive]\ntype = drive\nscope = drive\nroot_folder_id = %s\nservice_account_file = %s\n' "$GDRIVE_FOLDER_ID" "$key" > "$config"
          if test "${BEFORE//0/}"; then
            git diff --name-only --diff-filter=ACMRT -z "$BEFORE" "$AFTER"
          else
            git ls-files -z
          fi | while IFS= read -r -d '' file; do
            case "$file" in build|build/*) continue ;; esac
            rclone copyto --config "$config" "$file" "gdrive:$file"
          done