check_for_changes.yml

name: CheckForChanges

on:
  schedule:
    - cron: "40 12 * * *"

jobs:
  checkForChanges:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: UseNode
        uses: actions/setup-node@v3
        with:
          node-version: "20.x"
      - name: ScrapeMarkets
        run: |
          cd ./scraper
          npm install
          npm run leipzigde
          git diff markets_leipzig_de.json | echo >> git_diff.txt
          if [ -s git_diff.txt ]; then echo "HAS_CHANGES=TRUE" >> "$GITHUB_OUTPUT"; fi
      - name: UploadWeihnachtsmaerkte
        if: ${{ steps.ScrapeMarkets.outputs.HAS_CHANGES }}
        uses: actions/upload-artifact@v3
        with:
          name: weihnachts_maerkte_leipzigde.json
          path: markets_leipzig_de.json
          retention-days: 1
      - name: UploadDiff
        if: ${{ steps.ScrapeMarkets.outputs.HAS_CHANGES }}
        uses: actions/upload-artifact@v3
        with:
          name: git_diff.txt
          path: git.diff
          retention-days: 1
      - name: FailOnChanges
        if: ${{ steps.ScrapeMarkets.outputs.HAS_CHANGES }}
        run: exit 1