.vimrc

set tags=./tags;$HOME

rtags

#!/usr/bin/env ruby

require 'rubygems'
require 'bundler'

# Exit if there is no Bundler
unless defined?(Bundler)
  puts 'No Bundler found. Please run gem install bundler.'
  exit
end

# Rtags processor
class Rtags
  attr_reader :full_name, :help

  def initialize
    @options = {}
    ARGV.each_with_index { |v,idx| @options[ARGV[idx*2]] = ARGV[idx*2+1] }
    @full_name = File.join(options['-f'] || './tags')
    @help =<<-TEXT
      Generates ctags tagfile with included gems from bundle.

      Options:

        -h - shows this help
        -f - tagfile name (default './tags')
    TEXT
  end

  def options
    @options
  end

  def has_help_key?
    options.has_key?('-h')
  end

  def generate_ctags
    if File.exists?("./Gemfile")
      create_project_ctags(full_name)
      create_gems_ctags(full_name)
      puts "\n", 'Completed!'
    else
      puts 'Run script in folder with Gemfile.'
      exit
    end
  end

  private

  def create_project_ctags(full_name)
    puts 'Creating ctags'
    ENV["BUNDLE_GEMFILE"] = File.join(ENV["PWD"], "Gemfile")
    `rm #{full_name}` if File.exists?(full_name)
    `ctags -f #{full_name} -R .`
  end

  def create_gems_ctags(full_name)
    Bundler.load.specs.each do |s|
      `ctags -a -f #{full_name} -R #{s.full_gem_path}`
      print "."
    end
  end
end

# Executing script
r = Rtags.new

if r.has_help_key?
  puts r.help
  exit
else
  r.generate_ctags
end