A script for showing the derived data folder for an Xcode workspace. Intended to be invoked from a custom behaviour

ShowDerivedData.rb

#!/usr/bin/env ruby
# This script currently only works if you have your derived data in the default location.

# Get the workspace name to search for, or exit with code 1 if no value in envariable
xcodeWorkspacePath = ENV["XcodeWorkspacePath"] || exit(1)
projectName = xcodeWorkspacePath[%r{/(\w+)\.xcodeproj}, 1]

#Get the folders in derived data that could match the workspace
derived_data = File.expand_path("~/Library/Developer/Xcode/DerivedData")
# Glob out the files matching our project
Dir["#{derived_data}/#{projectName}*"].each do |folder|
  # Passing args in this fashion auto-escapes them
  exec "open", folder
end

__END__
Example value for ENV["XcodeWorkspacePath"] is "/Users/caius/Projects/SkypeAnySize/SkypeAnySize.xcodeproj/project.xcworkspace" (Xcode 4.2, 10.7 mac app project)