mxcl/homebrew — pull request #16172 by sferik (2012-11-21 01:37:56+00:00)
Title: ruby-build 20121120

* Added optional package checksum support. When a package URL is annotated with an MD5 checksum, ruby-build will use it to verify the contents of the downloaded file. Package URLs in all existing definitions have been updated with checksum annotations.
* Added an optional package download cache. When the RUBY_BUILD_CACHE_PATH environment variable is set to a directory of your choice, ruby-build will store downloaded packages there and reuse
them for future installations.
* Added mirror support for faster package downloads. Packages on the official ruby-build mirror will be served via S3. You can point ruby-build to your own local package mirror by setting the RUBY_BUILD_MIRROR_URL environment variable.