module Kernel

TcravitRubyLib: Random useful stuff for Ruby programming.

File : on_execute.rb Description : Make a script both includable and directly runnable

Copyright 2011-2018, Tammy Cravit.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Public Instance Methods

on_execute() { || ... } click to toggle source

A bit of ruby hackery to enable the script to be run directly from the command line, as well as included into other code. (Courtesy of elliottcable).

Example:

class MyApp
  # ...
  def start()
    #...
  end
end

on_execute do
  MyApp.new().start()
end

# File lib/tcravit_ruby_lib/on_execute.rb, line 42
def on_execute
  calling_file = caller.first.split(':').first
  if File.expand_path(calling_file) == File.expand_path($0)
    yield
  end
end