Feature: Seed a page tree from a definition 

Description 

The extension ships a console command that writes a page tree and its content from a YAML definition:

vendor/bin/typo3 theme:seed

It is meant for development and test instances, so a frontend to look at can be rebuilt from nothing rather than clicked together by hand. The definition lives in the repository, which makes the instance reproducible for everyone working on it.

The shipped definition is EXT:theme_extension_development/Configuration/Seeds/Demo.yaml. Another one is written by passing its path:

vendor/bin/typo3 theme:seed EXT:my_package/Configuration/Seeds/Other.yaml
vendor/bin/typo3 theme:seed --root-page=12 --force

The format keeps its structural keys to identifier, uid, children and content; every other key is a field of the record:

identifier: demo

pages:
  - identifier: home
    uid: 1
    title: 'Theme demo'
    slug: '/'
    is_siteroot: 1
    content:
      - identifier: home-heading
        CType: header
        header: 'A frontend to look at'

Records are written through DataHandler rather than as database rows, so slugs, TCA defaults, sorting, the reference index and the caches are handled by the core rather than reimplemented.

files:
  - identifier: placeholder
    source: 'EXT:my_package/Configuration/Seeds/Files/placeholder.svg'
    folder: 'theme-demo'

pages:
  - identifier: home
    files:
      media:
        - placeholder
        - identifier: portrait
          alternative: 'A placeholder graphic'
          title: 'Placeholder'
          description: 'Rendered as the caption'