Milkshake

Milkshake allows you to compose rails apps from several other rails apps specially packed as gems.

Creating a host application

To create a new host application you must use the create.host command.

$ milkshake create.host my_host_applications
Rails app successfully created!
Rails app successfully cleaned!
Milkshake successfully installed!
Rails app successfully stripped!
$ ls my_host_applications
config db log public script tmp

The most important part of the host application is the config/milkshake.yml file.

gems:
my-gem:
  version: 0.2.38
  lib:     my_gem
  source:  http://www.github.com

After changing the milkshake.yml or updating some gems you must touch tmp/relink.txt and restart your app server (touch tmp/restart.txt for passenger).

Creating a gem application

Gem applications can be packaged as gems and can be linked back into host applications.

$ milkshake create.gem my_gem_applications
#   anwser the questions milkshake asks you

Installation

#   you need gemcutter first
$ sudo gem install gemcutter
$ sudo gem tumble
#   then just install milkshake
$ sudo gem install milkshake

Wish list

link rake tasks from [gem path]/lib/tasks (is this needed?)
migrate down when removing (or downgrading) a gem.

Note on Patches/Pull Requests