Acceptance Criteria

• $ThemeDir is restored to templates
• The value of ThemeDir depends on the template it is being used within
• The value will the root-relative URL (i.e. starts with “/”) of the theme folder, as processed by ResourceURLGenerator.
• A template string such as <img src="$ThemeDir/images/something.png"> will reference images/something.png within the theme.

Exclusions:

• Direct access to ThemeDir from ViewableData isn’t necessary (so it can be implemented as a template global instead if preferred)

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$ThemeDir is used in templates to pull in assets. This is currently used by https://github.com/silverstripe-themes/silverstripe-simple to pull in a JS file.

However this is now broken after moving to cascading themes.

PRs

• https://github.com/silverstripe/silverstripe-framework/pull/7626