Generates Ctags and Vim Paths from Gemfile.lock

ctags_vim_paths_gemfile.rb

#!/usr/bin/ruby
require 'rubygems'
require 'bundler'

=begin
This script was written to incorporate Bundler and Gemfile.lock into
Vim's tag and file-finding tools.
=end

# This code generates ctags.  If a Gemfile.lock is found
# in the current directory, tags will be generated for
# every gem referenced in the Gemfile.

bundler_paths = []
if File.exist?('Gemfile.lock')
  lockfile_contents = Bundler.read_file('Gemfile.lock')
  lockfile = Bundler::LockfileParser.new(lockfile_contents)
  bundler_paths = lockfile.specs.map do |spec|
    spec.__materialize__
    spec.full_gem_path
  end
end

opts         = "--extra=+f -R"
exclude_dirs = "--exclude=.git --exclude=log --exclude=.svn"
ctag_paths   = "* #{bundler_paths.map {|x| x + '/*'}.join(' ')}"
command      = "ctags #{opts} #{exclude_dirs} #{ctag_paths} 2> /dev/null"

puts "Processing ctags..."
system command
puts "Finished generating tags file."