Advanced YAML trick: anchors

@ianstalk wrote:

The template plugin in Flexget is great, but it has its limitations; you wind up repeating yourself a lot anyway. Enter: YAML anchors! They'll let you do templating at a much more granular level. Here's an example config (NOTE: the below config relies on the fact that Flexget doesn't validate tasks/templates prefixed by an underscore):

templates:
  anchors:
    _transmission: &transmission
      enabled: yes
      host: '{{ secrets.transmission.host }}'
      port: 9091
      username: '{{ secrets.transmission.username }}'
      password: '{{ secrets.transmission.password }}'

    _trakt_credentials: &trakt-credentials
        username: '{{secrets.trakt.username}}'
        account: '{{secrets.trakt.account}}'

  series-transmission:
    transmission: 
      <<: *transmission
      ratio: 5
      path: '/Volumes/Drobo/downloads/tv/'
      
  movies-transmission:
    transmission: 
      <<: *transmission
      ratio: 5
      path: '/Volumes/Drobo/downloads/movies/'

  series-trakt-list: &series-trakt-list
    trakt_list:
      <<: *trakt-credentials
      list: 'TV Queue'
      type: shows
      strip_dates: yes

tasks:
  series-trakt-clean:
    priority: 107
    template: [series-trakt-list]
    disable: seen
    list_remove:
      - <<: *series-trakt-list

  transmission-clean:
    priority: 999
    disable: details
    no_entries_ok: yes
    clean_transmission:
      <<: *transmission
      transmission_seed_limits: yes
      delete_files: yes
      finished_for: 5 days
      directories:
        - "/Volumes/Drobo/downloads/tv/.*"
        - "/Volumes/Drobo/downloads/movies/.*"

Use &achrorname to define an anchor, then you can reference it with <<: *anchroname. Anything scoped below the anchor will be copied when you reference it. You can even override values defined in an anchor, though my example doesn't show anything like that. https://gist.github.com/bowsersenior/979804 is a good quick overview of anchor syntax if you want to learn more.

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