Rubygems executable hooks

Add next rubygems plugin support for executables.

Usage

Install the gem:

gem install executable-hooks

In gem lib dir create rubygems_executable_plugin.rb:

Gem.execute do |original_file|
  warn("Executing: #{original_file}")
end

Generate and install the new gem with executable hook.

Now try it:

gem install haml
haml --version

Returns:

Executing: /home/mpapis/.rvm/gems/ruby-1.8.7-p374-new1/bin/haml
Haml 4.0.3