tags.rake

# Generate tags
require 'rubygems'

module Tags
  # TODO: add gem dirs
  RUBY_DIRS = %w( lib vendor/gems )
  GEM_PATHS = Gem.path

  def ruby_paths
    (RUBY_DIRS + GEM_PATHS).find_all{|d| File.exists? d }
  end
  module_function :ruby_paths

  # exuberant-ctags package is required to use -R switch.  On
  # ubuntu, if emacs is installed, it's provided etags is higher
  # priority then exuberant etags, so may want to run galternatives to
  # fix it.
  CTAGS_CMD = 'ctags'
  ETAGS_CMD = 'etags'
end

namespace 'tags' do
  desc 'Make tags for Emacs'
  task :emacs do
    puts "Making Emacs TAGS file"
    sh "#{Tags::ETAGS_CMD} -R #{Tags::ruby_paths.join(' ')}", :verbose => false
  end

  desc 'Make tags for vi'
  task :vi do
    puts "Making vi TAGS file"
    sh "#{Tags::CTAGS_CMD} -R #{Tags::ruby_paths.join(' ')}", :verbose => false
  end

  desc 'Make tags for both Emacs and vi'
  task :both => [:emacs, :vi]
end

task :tags => ["tags:both"]
task :etags => ["tags:emacs"]
task :ctags => ["tags:vi"]