Annotation processing fails with Dagger 1.2.2, Gradle 2.4, Eclipse 4.5.0 Mars

Question

Dagger 1.2.2, Gradle 2.4, Eclipse 4.5.0 Mars on OSX 10.9.5.

Attempting to run a JUnit test fails within Eclipse: "Please ensure that code generation was run for this module."

This is a Gradle project in Eclipse with the versions shown above.

JUnit tests run successfully from the command line ("./gradlew clean test").

Project Properties:Java Compiler:Annotation Processing shows: all check boxes checked. Generated code goes to .apt_generated. No Processor Options are specified.

Project Properties:Java Compiler:Annotation Processing:Factory Path shows: dagger-compiler-1.2.2.jar is present and checked, javawriter-2.5.0 is present and checked, dagger-1.2.2.jar is present and checked.

org.eclipse.jst.ws.annotations.core is present but not checked (checking it and rebuilding doesn't seem to make any difference).

The "checked" jars are all being taken from my ~/.gradle/caches directory.

Nothing appears in the .apt_generated directory (I gather that generated class files are supposed to appear there; I've never seen any.)

Thoughts? [Edit: added missing word "line"]

Answer 1

Another developer here knew the answer to this question:

Open the Properties of the project that uses Dagger (use the project context menu, not the main menu).

Go to Java Compiler: Annotation Processing.

Deselect the Enable Annotation Processing checkbox.

Click Apply. You should be prompted to rebuild the entire project; yes.

Reselect the Enable Annotation Processing checkbox. Apply. Rebuild the project.

The generated classes should now appear in .apt_generated.

I don't know exactly how this might interact with the Build Automatically setting on the project, but I think it's safe to call this a bug in Eclipse. I will see about filing a bug against Eclipse.