[refs #90] initial

app/models/project.rb

@@ -6,6 +6,7 @@ class Project < ActiveRecord::Base
   belongs_to :owner, :polymorphic => true, :counter_cache => :own_projects_count
 
   has_many :issues, :dependent => :destroy
+  has_many :pull_requests, :dependent => :destroy
   has_many :build_lists, :dependent => :destroy
 
   has_many :project_imports, :dependent => :destroy

app/models/pull_request.rb

@@ -0,0 +1,62 @@
+class PullRequest < Issue
+  serialize :data
+
+  state_machine :initial => :open do
+
+    event :open do
+      transition :closed => :open
+      transition :blocked => :open, :if => lambda {|pull| pull.can_merge?}
+    end
+
+    event :block do
+      transition :open => :blocked
+    end
+
+    event :merge do
+      transition :open => :merged,  :if => lambda {|pull|  pull.can_merge?}
+      transition :open => :blocked, :if => lambda {|pull| !pull.can_merge?}
+    end
+
+    event :close do
+      transition [:open, :blocked] => :closed
+    end
+  end
+
+  def can_merge?
+    !merge
+  end
+
+  protected
+
+  def path
+    if Rails.env == "production"
+      File.join('/srv/rosa_build/shared/tmp', "pull_requests", [id, project.owner.uname, project.name].join('-'))
+    else
+      File.join(Rails.root, "tmp", Rails.env, "pull_requests", [id, project.owner.uname, project.name].join('-'))
+    end
+  end
+
+  def merge
+    clone
+    system "cd #{path} && git checkout #{data.base_branch} && git merge #{data.head_branch} && git reset --hard #{data.head_branch}"
+  end
+
+  def clone
+    git = Git.new(path)
+
+    unless git.exist?
+      FileUtils.mkdir_p(path)
+      Dir.chdir(path) do
+        system("git clone --local --no-hardlinks #{project.path} #{path}")
+      end
+    else
+      Dir.chdir(path) do
+        [data.base_branch, data.head_branch].each do |branch|
+          system "git checkout #{branch} && git pull origin #{branch}"
+        end
+      end
+    end
+    # TODO catch errors
+  end
+
+end

db/migrate/20120412173938_create_pull_requests.rb

@@ -0,0 +1,6 @@
+class CreatePullRequests < ActiveRecord::Migration
+  def change
+    add_column :issues, :type, :string
+    add_column :issues, :data, :text, :null => false, :default => 0
+  end
+end

spec/models/pull_request_spec.rb

@@ -0,0 +1,5 @@
+require 'spec_helper'
+
+describe PullRequest do
+  pending "add some examples to (or delete) #{__FILE__}"
+end