Groovy Eclipse plugin breaks Scala Eclipse plugin

Clarification: Link points to the Scala Eclipse plugin update site.

Andrew - do you know if the scala pointcuts are targeted at things like compilationunit creation and would be missing things we have factored out?

I am fairly certain that the problem has to do with the CompilationUnitProviderAspect that comes with the JDT Weaving support that the Scala Plugin uses. They are using a very old version of JDT Weaving and this has some bad effects (such as not being able to co-exist with a recent build of AJDT).

The only reasonable solution that I can think of is for the Scala plugin to use a more recent version of JDT Weaving. I believe that there is already a bug already open for this:

https://lampsvn.epfl.ch/trac/scala/ticket/2327

Actually, reading the bug now, it seems like it is describing a slightly different issue. So, I'd recommend that you open a new bug for the scala plugin. If you do, please post a link here. I'll be happy to help them fix it.

Potential workaround:

1. Uninstall the scala plugin.

2. Install JDT Weaving and Equinox Aspects from here instead:
http://download.eclipse.org/tools/ajdt/35/dev/update

3. install the latest nightly build of the scala plugin:
http://www.scala-lang.org/scala-eclipse-plugin-nightly
This latest version of the plugin adds JDT Weaving as an optional dependency and so it is possible to install a later version of it.

I am installing the nightly build of the plugin right now to see if the problem goes away.

Just raised https://lampsvn.epfl.ch/trac/scala/ticket/2408

Yes, it's still broken.

Just checked with:

• eclipse-jee-galileo-SR1-macosx-cocoa.tar.gz
• new workspace
• AspectJ from http://download.eclipse.org/tools/ajdt/35/dev/update
• Weaving enabled (before installing groovy or scala plugins)
• scala-nightly

I'll try to attach a screen grab so you can check versions...

> I'll try to attach a screen grab so you can check versions...

Attached.

Also I forgot to mention: I've checked the scala plugin behaves correctly after uninstalling the Groovy feature, restarting Eclipse and doing a clean rebuild.

Got it. This was a real pain to find. The Scala plugin is now using so many aspects and there is no load-time weaving tool support, so I had to trace through the aspects by hand (and mind) to find out which one was broken.

The problem was with org.eclipse.jdt.internal.core.util.Util.isJavaLikeFileName was no longer being called from jdt, but rather was delegated and called from within groovy-eclipse.

The change I made ensures that the method is called from within JDT if the project is not a groovy project.