Symlink the whole hooks directory

Conflicts:
	CHANGELOG
	lib/gitlab_projects.rb

CHANGELOG

 v1.9.8
   - Ignore missing repositories in create-hooks
+  - Symlink the whole hooks directory
 
 v1.9.7
   - Increased test coverage

lib/gitlab_projects.rb

@@ -5,6 +5,8 @@ require_relative 'gitlab_config'
 require_relative 'gitlab_logger'
 
 class GitlabProjects
+  GLOBAL_HOOKS_DIRECTORY = File.join(ROOT_PATH, 'hooks')
+
   # Project name is a directory name for repository with .git at the end
   # It may be namespaced or not. Like repo.git or gitlab/repo.git
   attr_reader :project_name
@@ -18,9 +20,11 @@ class GitlabProjects
   attr_reader :full_path
 
   def self.create_hooks(path)
-    hook = File.join(path, 'hooks', 'update')
-    File.delete(hook) if File.exists?(hook)
-    File.symlink(File.join(ROOT_PATH, 'hooks', 'update'), hook)
+    local_hooks_directory = File.join(path, 'hooks')
+    unless File.realpath(local_hooks_directory) == File.realpath(GLOBAL_HOOKS_DIRECTORY)
+      FileUtils.mv(local_hooks_directory, "#{local_hooks_directory}.#{Time.now.to_i}")
+      FileUtils.ln_s(GLOBAL_HOOKS_DIRECTORY, local_hooks_directory)
+    end
   end
 
   def initialize