|Hi there! I'm sorry to tell you that this page is still under construction. The responsible for this mess is Miquel (mssola on IRC).|
First of all, you need to compile KDevelop and KDevPlatform. There's instructions on how to do this here: KDevelop4/HowToCompile. If you have succeeded in installing KDevelop and KDevPlatform, you can install the Ruby plugin in pretty much the same way. First, download the source code:
git clone git://anongit.kde.org/kdev-ruby
Then you will compile it by doing the following:
mkdir build cd build cmake -DCMAKE_INSTALL_PREFIX=$HOME/kdevelop4 ../ make make install
Last but not least, make sure to run
kbuildsycoca4 after the installation process.