Mac OS X install error: No available formula for gtest

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Hi Everybody!

I am trying to install ROS Electric on OS X Lion. I follow this tutorial but when I execute the command

rosinstall ~/ros "http://packages.ros.org/cgi-bin/gen_rosinstall.py?rosdistro=electric&variant=desktop-full&overlay=no"

I get the following error:

...
Bootstrapping ROS build
Detected ros_comm bootstrapping it too.
Using environment variable ROS_OS_OVERRIDE name = osxbrew version = lion
[ rosmake ] Packages requested are: ['ros', 'ros_comm']                                                                                                                                                
[ rosmake ] Logging to directory/Users/martin_peris/.ros/rosmake/rosmake_output-20120827-171936                                                                                                        
[ rosmake ] Expanded args ['ros', 'ros_comm'] to:
['rosunit', 'rospack', 'rosmake', 'rosemacs', 'rosdep', 'roscreate', 'rosclean', 'rosboost_cfg', 'rosbash', 'test_rospack', 'test_rosmake', 'test_roslib', 'test_rosdep', 'test_roscreate', 'roslib', 'roslang', 'rosbuild', 'mk', 'xmlrpcpp', 'roswtf', 'rostime', 'message_filters', 'cpp_common', 'topic_tools', 'rostopic', 'rostest', 'rosservice', 'rosparam', 'rosout', 'rosnode', 'rosmsg', 'rosmaster', 'roslaunch', 'rosgraph', 'rosconsole', 'rosbagmigration', 'rosbag', 'test_topic_tools', 'test_roswtf', 'test_rostopic', 'test_rostime', 'test_rostest', 'test_rosservice', 'test_rospy', 'test_rosparam', 'test_rosnode', 'test_rosmsg', 'test_rosmaster', 'test_roslib_comm', 'test_roslaunch', 'test_rosgraph', 'test_roscpp_serialization_perf', 'test_roscpp_serialization', 'test_roscpp', 'test_rosbag', 'test_ros', 'test_crosspackage', 'perf_roscpp', 'roscore_migration_rules', 'std_srvs', 'std_msgs', 'rosgraph_msgs', 'rospy', 'roslisp', 'roscpp_traits', 'roscpp_serialization', 'roscpp']
[ rosmake ] Generating Install Script using rosdep then executing. This may take a minute, you will be prompted for permissions. . .                                                                   
Using environment variable ROS_OS_OVERRIDE name = osxbrew version = lion
Executing script below with cwd=/var/folders/yz/rvk6x5qs5vd2h4bfp83xwm3r0000gn/T
{{{
#!/bin/bash
#Packages ['gtest']
brew install gtest --universal
}}}

Error: No available formula for gtest 
Failed to install gtest!
[ rosmake ] rosdep install failed: Rosdep install failed                                                                                                                                               
Traceback (most recent call last):
  File "/usr/local/bin/rosinstall", line 16, in <module>
    sys.exit(not rosinstall_main(sys.argv))
  File "/Library/Python/2.7/site-packages/rosinstall/rosinstall_cli.py", line 228, in rosinstall_main
options.catkinpp)
  File "/Library/Python/2.7/site-packages/rosinstall/rosinstall_cmd.py", line 100, in cmd_generate_ros_files
subprocess.check_call("source %s && rosmake ros%s --rosdep-install%s" % (os.path.join(path, 'setup.sh'), ros_comm_insert, rosdep_yes_insert), shell=True, executable='/bin/bash')
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 504, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'source /Users/martin_peris/ros/setup.sh && rosmake ros ros_comm --rosdep-install' returned non-zero exit status 1
Martin-iMac:~ martin_peris$ brew install gtest --universal
Error: No available formula for gtest

I have been researching a bit and it seems like gtest formula has been removed from hombrew. Any Ideas? workarounds? suggestions?

UPDATE

As long as I can not answer my own questions, I post a (suboptimal) solution to my problem. I created manually the file /usr/local/Library/Formula/gtest.rb with the contents:

require 'formula'

class Gtest < Formula
  url 'http://googletest.googlecode.com/files/gtest-1.5.0.tar.gz'
  homepage 'http://code.google.com/p/googletest/'
  md5 '7e27f5f3b79dd1ce9092e159cdbd0635'

  def options
    [
      ["--universal", "Build for both 32 & 64 bit Intel."],
    ]
  end

  def install
    ENV.universal_binary if ARGV.build_universal?

    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
    # gtest-config tries to be clever in locating libraries, but Homebrew's
    # Cellar confuses it. This lets `gtest-config --libs` work correctly
    inreplace 'scripts/gtest-config', '`dirname $0`', '$bindir'
    system "make install"
  end
end

I have no longer problems with gtest, but now the installation fails for another reason. I guess I should start a new question for that.

Thanks!!