[refs #700] fix fork && repare task

lib/modules/models/git.rb

@@ -116,7 +116,7 @@ module Modules
       end
 
       def fork_git_repo
-        dummy = Grit::Repo.new(path) rescue parent.repo.fork_bare(path)
+        dummy = Grit::Repo.new(path) rescue parent.repo.fork_bare(path, :shared => false)
         write_hook
       end
 

lib/tasks/git_detach_from_parent.rake

@@ -0,0 +1,13 @@
+namespace :project do
+  desc 'Break the dependency of a repository cloned with --shared on its source repository'
+  task :git_detach_from_parent => :environment do
+    projects = Project.where('ancestry IS NOT NULL')
+    say "Total count of the forked projects is #{projects.count}"
+    projects.each_with_index do |project, ind|
+      Dir.chdir(project.path) do
+        say "--Start work with #{project.name_with_owner} (#{ind+1}/#{projects.count})--"
+        say (system('git', 'repack', '-a') ? 'Ok!' : 'Something wrong!')
+      end
+    end
+  end
+end