To checkout the source, run this command with your subversion client.
svn checkout
https://svn.apache.org/repos/asf/openejb/trunk/openejb-eclipse-plugin openejb-eclipse-plugin
To build the plugin you will need Maven (the build has been tested with Maven 2.0.7). To run the build, issue this command
mvn -Dassemble clean install
You should be aware that this will download any dependencies, including a copy of Eclipse. This will take a while for your first build.
You can generate the Eclipse projects for the plugins by running the following command
mvn eclipse:clean eclipse:eclipse
You can add the M2_REPO classpath variable to your Eclipse workspace by running the following command
mvn -Declipse.workspace=<path-to-eclipse-workspace>
eclipse:add-maven-repo