Running this should only require Rails 2.2.2 or later, the command line
interfaces for sqlite3 and curl and the mislav-will_paginate plugin.
Tested on Ubuntu Linux 9.04 ("Jaunty Jackalope") and Mac OSX 10.5.6 ("Leopard").

Installation of all necessary dependencies from a fresh install of Ubuntu 9.04:

  sudo apt-get install rails git-core sqlite3 curl
  sudo gem install rubygems-update
  sudo /var/lib/gems/1.8/bin/update_rubygems
  sudo gem install rails
  sudo gem sources -a http://gems.github.com
  sudo gem install mislav-will_paginate

Execution instructions:

  ruby makedepot.rb [VERSION] [restore] [RANGE]... [save]

    "restore" - restore from snapshot before resuming execution

    "VERSION" specifies the Rails version to test.  Examples:
      edge
      _2.2.2_
      ~/git

    "RANGE" specifies a set of sections to execute.  Examples:
      6.2..6.5
      7.1-9.5
      16

    "save" - save snapshot after execution completes

  Output will be produced as makedepot.html.

Tests against makedepot.html can also be run separately:

  ruby checkdepot.rb [partial]

  "partial" means that tests which cover sections that are not included in
    makedepot.html are to be omitted.