I wanted to use Vim’s Command-T plugin (via this awesome Vim config) for fast file navigation. But this plugin needs Vim to be compiled with Ruby support since it’s is written in Ruby. You can check with

vim --version

Unfortunately, I saw “-ruby” which means it lacks Ruby support. I was previously using Vim 7.2 on Ubuntu 10.04 Lucid. First I uninstalled my old Vim and installed dependencies required to compile a new one:

sudo apt-get remove vim-common vim-runtime vim-gtk vim-gui-common
sudo apt-get build-dep vim

Then I compiled the latest version of Vim (7.3 as of this writing) from source:

hg clone https://vim.googlecode.com/hg/ vim
cd vim
./configure --enable-pythoninterp --enable-rubyinterp
make
sudo make install

If you don’t have Mercurial hg run:

sudo apt-get install mercurial