A simple utility for creating Ruby/Rails app and spec code with one command.

mkrb.py

#!/usr/bin/env python
"""
mkrb.py

Usage:
    mkrb.py path_to_file

Example:
    mkrb services/widget_extractor

Would create app/services/widget_extractor.rb and
spec/services/widget_extractor_spec.rb with stub contents.
"""

import os
import sys

APP_CONTENTS = "class {classname}\nend\n".format
SPEC_CONTENTS = "require 'rails_helper'\n\ndescribe {classname} do\nend\n".format


def main(full_path):
    classname = os.path.basename(full_path).title().replace('_', '')

    create_app_file(full_path, classname)
    create_spec_file(full_path, classname)


def create_app_file(path, classname):
    app_path = "app/{path}.rb".format(path=path)
    with open(app_path, 'w') as app_file:
        app_file.write(APP_CONTENTS(classname=classname))


def create_spec_file(path, classname):
    spec_path = "spec/{path}_spec.rb".format(path=path)
    with open(spec_path, 'w') as spec_file:
        spec_file.write(SPEC_CONTENTS(classname=classname))


if __name__ == "__main__":
    main(sys.argv[1])