Homebrew/homebrew-versions — pull request #30 by aom (2012-08-08 07:48:22+00:00)
Title: Added formula for Grails 1.3.9

According to ticket below it is not recommended to update main repository.

I wasn't able to install the version using @caiofbpa's formula so I copied 1.3.8 found from here. Formula is installed and tested with MacOS 10.7.4.

https://github.com/mxcl/homebrew/issues/14022