Please follow these instructions to get and compile the source code:
- Download Eclipse "for RCP and RAP Developers"
- Get the latest version of Xtext and EMF SDK
- Get protobuf-dt source from the Git repo
- Create the folder "src-gen" in both projects com.google.eclipse.protobuf and com.google.eclipse.protobuf.ui
- Go to project com.google.eclipse.protobuf and navigate to the file GenerateProtobuf.mwe2 (in the package com.google.eclipse.protobuf, in the src folder)
- Right-click GenerateProtobuf.mwe2 and select "Run As" > "MWE2 Workflow"
That will generate the Xtext-based infrastructure needed. Now the source code is complete, simply run the project com.google.eclipse.protobuf as an "Eclipse Application."