Feature-based versioning

Feature-based versioning allows us to define and control the versions of an arbitrarily named "feature" in one place.

Note: Do not delete data/features/placeholder.yml because it is used by tests.

How it works

Add a new YAML file with the feature name you want to use in this directory. For a feature named meow, that would be data/features/meow.yml.

Add a versions block to the YML file with the short names of the versions the feature is available in. For example:

versions:
  fpt: '*'
  ghes: '>3.1'
  ghae: '*'

The format and allowed values are the same as the frontmatter versions property.

Now you can use {% if meow %} ... {% endif %} in content files! Note this is the if tag, not the new ifversion tag.

You can also use the feature in frontmatter in content files:

versions:
  fpt: '*'
  ghes: '>3.1'
  feature: 'meow'

If you want a content file to apply to more than one feature, you can do this:

versions:
  fpt: '*'
  ghes: '>3.1'
  feature: ['meow', 'blorp']

The schema for validating the feature versioning lives in tests/helpers/schemas/feature-versions-schema.js and is exercised by tests/linting/lint-files.js.

TBD!