capistrano deploy:check for local git repo

deploy.rake

namespace :deploy do
  namespace :git do
    before :check, :local_repo do
      on release_roles :all do
        unless test "[ -d #{fetch(:local_repo_path)} ]"
          execute :mkdir, '-p', fetch(:local_repo_path)
          execute :git, "init --bare #{fetch(:local_repo_path)}"
        end
      end
    end
  end
end