Using Eclipse with JRuby Truffle

This is an experiment, mainly to have a much better feedback from the Truffle DSL annotation processor and ideally much faster compile time!

Using integrated Maven support

Create a new workspace in Eclipse (>= Luna).

Start by ensuring there is no leftover configuration:

$ rm -rf {core,truffle}/{.classpath,.settings,.project}

We can now import the two projects:

• From the main menu bar, select File > Import...
• Select Maven > Existing Maven Projects
• Select jruby/core directory as root directory (NOT just jruby)
• Click Finish
• Repeat with jruby/truffle as root directory.

And now enable the Truffle annotation processor:

• Select the truffle project.
• Right click and choose Properties
• Select Java Compiler > Annotation Processing
• Click on Enable project specific settings, then OK
• Click Yes to rebuild the project.

You shall be set!

You might want to change the Output folder in Java Build Path so it is better separated from the Maven compilation process.

It is possible to run JRuby with a run configuration for org.jruby.Main.main(). For that you set the working directory to ${workspace_loc} in the Arguments tab.

Further integration is under investigation.