First, check out the active development branch of Apache Directory Studio and all co-projects run the following command:
svn co https://svn.apache.org/repos/asf/directory/sandbox/felixk studio
Build the maven-studio-plugin:
cd studio/studio-plugin mvn install
Change to studio:
cd ../studio
Run the following command to add necessary libraries to every projects:
mvn install eclipse:eclipse studio:eclipse -Dmaven.test.skip=true
After the command ends running successfully you'll have all the projects ready to be imported in Eclipse.
To remove the settings create by mvn eclipse:eclipse and/or mvn studio:eclipse you can run
mvn eclipse:clean studio:clean