def parse_command_line def run def config def guess_cpu def guess_version(os) def guess_platform(opts = {}) def platform_fail def install_fail def sys(*args) def unpack(distfile, target_dir) def fetch_spec(spec) def fetch def remote_files_matching(dir, regex) def platforms def versions def latest_version def make(*args) def ruby(*args) def build def raw_install_to_gem_install def install def verify_install(on_error = nil) def find_ruby_version(spec) def windows_install def uninstall def attribute(reader, &block) define_method(reader) { define_method(reader) { value } define_method(writer) { |value| def tap