Mac OS X Vim installer with Thor and Mercurial

https://gist.github.com/2984118

require 'thor'

class VimInstaller < Thor::Group
  include Thor::Actions

  def self.source_root
    '/tmp'
  end

  def clean_up
    vimify :clean, 'Cleaning previous installations' do
      run 'rm -fr vim'
    end
  end

  def set_up
    say_status :setup, 'Setup system ruby', :white
    run 'rbenv global system'
  end

  def download_vim
    vimify :download, 'Downloading VIM' do
      run 'hg clone https://vim.googlecode.com/hg/ vim'
    end
  end

  def configure_vim
    vimify :configure, 'Configuring VIM', 'vim' do
      options = ['--with-features=huge',
                 '--enable-cscope',
                 '--enable-pythoninterp',
                 '--enable-rubyinterp',
                 '--enable-perlinterp',
                 '--enable-multibyte',
                 '--enable-clipboard=yes',
                 '--enable-xterm_clipboard=yes']

      run "./configure #{options.join(' ')}"
    end
  end

  def set_arch_vim
    vimify :arch, 'Setting VIM arch', 'vim' do
      arch = "-arch x86_64"
      gsub_file 'src/auto/config.mk', /.*LDFLAGS.*/, "LDFLAGS     = -L. #{arch} -L/usr/local/lib"
    end
  end

  def make_vim
    vimify :make, 'Making VIM', 'vim' do
      run_with_gcc 'make'
    end
  end

  def verify_vim
    vimify :verify, 'Verifying VIM', 'vim/src' do
      run './vim --version'
    end
  end

  def install_vim
    vimify :install, 'Installing VIM', 'vim' do
      if yes?('Install VIM in /usr/bin [yes/no]? ')
        run_with_gcc 'sudo make install'
        say_status :install, "old vim symlink moved to /usr/bin/vim.old", :white
        run "sudo mv /usr/bin/vim /usr/bin/vim.old"
        run "sudo ln -s /usr/local/bin/vim /usr/bin/vim"
      else
        say 'Skipping'
      end
    end
  end

  def tear_down
    say_status :setup, 'Setup 1.9.3-p194 ruby', :white
    run 'rbenv global 1.9.3-p194'
  end

  private

  def vimify(status, message, dir = nil, &block)
    say_status status, message, :white

    if dir
      inside dir, &block
    else
      in_root &block
    end
  end

  def run_with_gcc(cmd)
    # resolve some weird problems with XCode 4.3 and rbenv
    run "env CC=/usr/bin/gcc #{cmd}"
  end
end