gistfile1.txt

#!/usr/bin/env ruby

require "#{ENV['TM_SUPPORT_PATH']}/lib/exit_codes.rb"
require "#{ENV['TM_SUPPORT_PATH']}/lib/ui.rb"

result = TextMate::UI.request_string(
  :title   => 'Open Rubygem', 
  :prompt  => 'Name of the gem to open',
  :default => ENV['TM_CURRENT_WORD'] || "",
  :button1 => 'Open'
)
TextMate.exit_discard if result.nil?

result.strip!

# Let TM_GEM point to your RVM gem command
system("#{(ENV['TM_GEM'] || "gem")} edit -e mate #{result}")

puts "Gem not found" unless $? == 0