ruby_tags.rb

#!/usr/bin/env ruby

if ARGV.size < 1
  puts "usage: ruby_tags [version]"
  exit 1
end

version = ARGV[0]
d = Dir["/home/jan/.rbenv/versions/#{version}/lib/ruby/gems/*/gems"]
raise "gems dir not found" if d.size < 1

gems_dir = d[0]
tags = "/home/jan/.vim/tags/ruby-#{version}"

if File.exists?(tags) && File.mtime(tags) >= File.mtime(gems_dir)
  puts "No changes since last generation."
else
  `ctags -R --exclude='*.js' --exclude='*.py' --totals=yes -f ~/.vim/tags/ruby-#{version} #{d.first}`
end