add file to xcode project

add_file.rb

# FYI:
# http://www.j7lg.com/archives/1732

require 'xcodeproj'

def bail_if_nil(obj, msg)
  return unless obj.nil?
  puts msg
  exit
end

def remove_first_path_component(path)
  arr = path.split('/')
  arr.delete_at(0)
  arr.join('/')
end

def find_subpath_from_main_group(project, group, name, path)
  project.main_group.find_subpath(path, true);
end

if (ARGV.length < 3)
  puts 'Usage: ' + $0 + ' <Project Name> <Group Name> <File Name>'
  exit
end

project = Xcodeproj::Project.open(ARGV[0] + '.xcodeproj')
target = project.targets.find { |element| element.name == ARGV[0] }

bail_if_nil(target, ARGV[0] + ' target not found.')

group = project.main_group.find_subpath(ARGV[1], true); # create new group if it does not exist
bail_if_nil(group, ARGV[1] + ' group not found.')

target.add_file_references([group.new_file(ARGV[2])])
project.save