run_swift_script.rb

#!/usr/bin/env ruby
# This will compile the given Swift script and run it

unless ARGV.count == 1
  puts "Please provide the path for the Swift source file to compile and run"
  exit -1
end

SOURCE_FILE = ARGV[0]
BASE_NAME = File.basename(SOURCE_FILE, ".swift")
SWIFT_BINARY = "#{File.dirname(SOURCE_FILE)}/#{BASE_NAME}"

if File.exists?(SWIFT_BINARY) && File.mtime(SOURCE_FILE) > File.mtime(SWIFT_BINARY)
  puts "Source file has been changed, removing outdated file #{SWIFT_BINARY}"
  File.delete(SWIFT_BINARY)
end

unless File.exists?(SWIFT_BINARY)
  `xcrun -sdk macosx swiftc "#{SOURCE_FILE}" -o "#{SWIFT_BINARY}"`
end

`#{SWIFT_BINARY}`