Have users import their template library instead of providing it

[fwgreen]

Providing an implementation of TemplateRenderer is helpful, but importing the template library might harm flexibility. Mustache, for example, is at version 0.9.3 for Java 8 and 0.8.18 for Java 7. A user might want the option to choose depending on requirements.

[bjansen]

So what you're saying is that I should only provide the view.api module, maybe give a few examples of implementations but not actually put them in modules and release them on Herd?

It could also be possible to override the imported module via an overrides.xml, or any new syntax that might come in the future.

[fwgreen]

It's great that you provide an implementation of the renderer: Some users might not think to wrap the Ceylon collections as Java collections and get into trouble. It's the import of the actually template library jar that, I believe, should be left to the user.

[bjansen]

Here are a few thoughts:

• net.gyokuro.view.* modules are convenient, and allow users to use a templating engine that Just Works™
• they are optional dependencies, so they don't clutter up net.gyokuro.core
• it's pretty easy to add an overrides file to use a different version of the engine than the one automatically pulled by these modules
• it's also easy to not import any of those modules and instead define a custom (Java)TemplateRenderer or modify one of those provided by gyokuro

As a result, I think I'll keep existing modules as is, and make them import the latest version of each engine. That should cover most of the use-cases, while leaving users with reasonable alternatives.