Rake task to create ctags for a Rails application

ctags.rake

# ctags.rake - Rake task to create ctags for a Rails application
#  and also including Ruby and Gem signatures
#
# Requires exuberant-ctags to be in $PATH

desc "Regenerate tags (CTAGS)"
task :ctags do
  puts " * Regenerating Tags"
  excludes = %w{
    .git
    app/views/
    coverage
    test/coverage
    doc
    features
    log
    tmp
  }
  excludes_options = excludes.map{|e| "--exclude=#{e}"}.join(' ')
  system("exuberant-ctags -V -a -R #{excludes_options} * `gem environment | grep INSTALLATION | awk '{print $4}'`/*")
end