Run the Swift 3 migrator for a project manually from the command line rather than letting Xcode do it

migrator.rb

require 'find'
require 'pp'

swift_file_paths = []
Find.find('./') do |path|

	if path =~ /.*\.swift$/ and !path.start_with? "./Carthage"
		swift_file_paths << path
		cmd = "xcrun swift-update -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk -target arm64-apple-ios9 #{path} > convert.swift"
		system cmd

		cmd = "cp convert.swift #{path}"
		system cmd

		cmd = "rm convert.swift"
		system cmd
	end
end