[refs #753] add rake

lib/tasks/change_git_head.rake

@@ -0,0 +1,13 @@
+namespace :project do
+
+  desc 'Change HEAD at projects where default branch is not master'
+  task :git_change_head => :environment do
+    projects = Project.where("default_branch <> 'master'")
+    say "Find #{projects.count} project(s) without master HEAD"
+    say "Start working..."
+    projects.each do |project|
+      `cd #{project.path} && git symbolic-ref HEAD refs/heads/#{project.default_branch}` if project.repo.branches.map(&:name).include?(project.default_branch)
+    end
+    say 'Done!'
+  end
+end