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() { || ... }
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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