add rake task to gather system information

lib/tasks/gitlab/info.rake

@@ -0,0 +1,48 @@
+namespace :gitlab do
+  namespace :app do
+    desc "GITLAB | Get Information about this installation"
+    task :info => :environment  do
+
+      puts ""
+      puts "Gitlab information".yellow
+      puts "Version:\t#{Gitlab::Version}"
+      puts "Resivion:\t#{Gitlab::Revision}"
+
+      # check which os is running
+      if Kernel.system('lsb_release > /dev/null 2>&1')
+        os_name = `lsb_release -irs`
+      elsif File.exists?('/etc/system-release') && File.readable?('/etc/system-release')
+        os_name = File.read('/etc/system-release')
+      elsif File.exists?('/etc/debian_version') && File.readable?('/etc/debian_version')
+        debian_version = File.read('/etc/debian_version')
+        os_name = "Debian #{debian_version}"
+      end
+      os_name = os_name.gsub(/\n/, '')
+
+      # check gitolite version
+      gitolite_version_file = "#{Gitlab.config.git_base_path}/../gitolite/src/VERSION"
+      if File.exists?(gitolite_version_file) && File.readable?(gitolite_version_file)
+        gitolite_version = File.read(gitolite_version_file)
+      else
+        gitolite_version = 'unknown'
+      end
+
+      puts ""
+      puts "System information".yellow
+      puts "System:\t\t#{os_name}"
+      puts "Home:\t\t#{ENV['HOME']}"
+      puts "User:\t\t#{ENV['LOGNAME']}"
+      puts "Ruby:\t\t#{ENV['RUBY_VERSION']}"
+      puts "Gems:\t\t#{`gem --version`}"
+
+      puts ""
+      puts "Gitolite information".yellow
+      puts "Version:\t#{gitolite_version}"
+      puts "Admin URI:\t#{Gitlab.config.git_host.admin_uri}"
+      puts "Base Path:\t#{Gitlab.config.git_base_path}"
+      puts "Hook Path:\t#{Gitlab.config.git_hooks_path}"
+      puts "Git:\t\t#{Gitlab.config.git.path}"
+
+    end
+  end
+end