How to enable zsh completion for Cocoa classes, methods, and property names for use with the `cocoadex` gem

zsh_completion_generator.rb

# A script to generate a zsh compdef file from Cocoadex keyword names
# Change the `TARGET` if you store zsh completion files somewhere other
# than `~/.zsh/completion`
#
# Reference:
#   - Writing own completion functions : http://askql.wordpress.com/2011/01/11/zsh-writing-own-completion/

require 'rubygems'
require 'cocoadex'

# set path to install completions file
TARGET = "~/.zsh/completion/_cocoadex.sh"

path = File.expand_path(TARGET)

File.open(path, 'wb') do |file|
  file.puts "#compdef cocoadex\n\n_arguments " + "'1: :("+Cocoadex::Keyword.tags.join(" ")+")'"
end