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apiVersion: doppels.so/v1alpha1
kind: Recipe

metadata:
  name: hn-top-stories
  version: 1.0.0

provides: [hn-top-stories]
runtime: shell

requires:
  commands: [node, curl]

steps:
  - id: fetch
    name: Fetch top stories from HN API
    run:
      shell: sh
      script: |
        curl -s "https://hacker-news.firebaseio.com/v0/topstories.json" \
          | node -e "
              const ids = JSON.parse(require('fs').readFileSync('/dev/stdin','utf8')).slice(0,10);
              process.stdout.write(ids.join('\n'));
            " > ids.txt
    produces:
      ids_file:
        file: ids.txt

  - id: write_csv
    name: Write stories CSV
    env:
      IDS_FILE: "{{ steps.fetch.ids_file }}"
    run:
      shell: sh
      script: |
        node scripts/fetch-stories.js "$IDS_FILE" > stories.csv
    produces:
      csv:
        file: stories.csv

returns:
  stories: "{{ steps.write_csv.csv }}"