[merb] Patch for better Bundler integration with Merb 1.1 (no more bin/rake, bin/spec, bin/merb)

[Jacques Crocker]

Hi. I've just committed some patches to merb-core and merb-gen that I  
believe will help make bundled Merb 1.1 apps much easier to work with.  
Traditionally when you bundle your gems within a merb app, you resign  
yourself to having to remember to use bin/rake, bin/merb, bin/spec,  
bin/cucumber whenever you want to interact with your application. This  
is fine for many (and it will still work with this patch), however I  
often would like to run rake, merb, spec without always remember to  
prefix it with bin/

Using the generated bundler gems/environment file in place of  
rubygems, I believe this patch will allow you to use any system gem  
(merb, rake, etc...) with the your app's bundler. Tried it out on a  
few newly generated merb apps, and it works well. If you can, please  
help me test this out so I can catch any edge cases and handle them
http://github.com/merbjedi/merb/commits/edge

Here's how to install the merb gems from my fork (edge branch):

     git clone git://github.com/merbjedi/merb.git
     cd merb
     git checkout edge
     rake install


Then create a new project using merb-gen:

     merb-gen app testproj
     cd testproj

     # list rake task using system rubygems
     rake -T

     # launch a merb console using system rubygems
     merb -i

     gem bundle

     # launch a merb console from bundled bin
     bin/merb -i

     # launch a merb console from system bin (using bundle environment)
     merb - i

     # list rake tasks from bundled bin
     bin/rake -T

     # list rake tasks from system bin (using bundle environment)
     rake -T


You can edit any existing project to use this approach by adding this  
to the top of your #{Merb.root}/Rakefile

     begin
       # Load the bundler environment from #{Merb.root}/gems/ 
environment.rb
       require File.join(File.dirname(__FILE__), "gems", "environment")
     rescue LoadError
       # Default to using system rubygems not bundled
       require "rubygems"
     end


And this to the top of your #{Merb.root}/spec/spec_helper.rb

     begin
       # Load the bundler environment from #{Merb.root}/gems/ 
environment.rb
       require File.join(File.dirname(__FILE__), "..", "gems",  
"environment")
     rescue LoadError
       # Default to using system rubygems not bundled
       require "rubygems"
     end


Any feedback great welcomed. Thanks.

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