Alternative Adapter for grack; uses the RJGit gem for a pure jruby interface to git repos. Together with Grack, this yields a pure jruby implementation of git's smart-http protocol.

gem install rjgit_grack

1. Get grack.
2. add grack and rjgit_grack to your Gemfile
3. You can tell Grack to use the RJGitAdapter by editing its configuration, for example:

require 'grack/app'
require 'grack/rjgit_adapter'

config = {
  :root => '/tmp/',
  :allow_push => true,
  :allow_pull => true,
  :git_adapter_factory => ->{ Grack::RJGitAdapter.new }
}

run Grack::App.new(config)

This adapter allows you to specify hooks to be called when receive operations (i.e. git push to the server) or upload operations (e.g. pulls, clones) are initiated. You can easily do this by passing an options hash to the Grack::RJGitAdapter.new call in the configuration, like so:

  :git_adapter_factory => ->{ Grack::RJGitAdapter.new({
    :preReceive => Proc.new do |received_refs|
      # This code is executed in the hook
      puts received_refs
    end
    }
  )}

You can specify the following hooks:

• :preReceive executed immediately before a receive-operation is performed. Yields an Array with Hash objects containing info about each ref that is about to be pushed, of the following form:

    {:ref_name => 'refs/heads/masters', :old_id => 'somesha1', :new_id => 'someothersha1', :type => "FAST_FORWARD"}
  

• :postReceive executed after a receive-operation is completed. Yields an Array with Hash objects for each ref that was pushed, of the same form as above, plus a :result field. The result will be a String, and can have one of the values defined by JGit.
• :preUpload executed immediately before an upload-operation is performed, i.e. before data is sent to the client. Yields an Array of String object-id's (SHA1-hashes) already in common between client and server.
• :postUpload executed after an upload-operation to a client is complete. Returns an org.eclipse.jgit.storage.pack.PackStatistics object (see here).

Note that JGit blocks all read and write operations on the repository until a hook is complete, so the hooks should only contain code that runs quickly (e.g. running workers or threads to perform the heavy work).

Run the specs:

rake

• Grack >= 0.1.0.pre2
• The RJGit gem, which requires JRuby

(The MIT License)

Copyright (c) 2013 Dawa Ometto <d.ometto@gmail.com>

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