type: graph
# Replace this with the absolute path to the folder containing orders.csv.
working_dir: /absolute/path/to/daily-report
steps:
  - id: read_orders
    name: Read orders
    run: cat orders.csv
    output: ORDERS

  - id: build_report
    name: Build report
    depends: [read_orders]
    run: |
      #!/usr/bin/env python3
      import csv
      import io
      import os
      from decimal import Decimal

      orders = list(csv.DictReader(io.StringIO(os.environ["ORDERS"])))
      revenue = sum(Decimal(order["amount_usd"]) for order in orders)
      print("# Daily sales report\n")
      print(f"- Orders: {len(orders)}")
      print(f"- Revenue: ${revenue:,.2f}")
      print(f"- Average order: ${revenue / len(orders):,.2f}")
    output: REPORT

  - id: save_report
    name: Save report
    depends: [build_report]
    run: |
      printenv REPORT > report.md
      cat report.md