resolv-macos

On macOS/darwin, libresolv supports multiple resolvers. This allows users, VPN clients, etc. to delegate queries for certain domains to other resolvers, in addition to the "Super Resolver" specified by /etc/resolv.conf. An example of this would be using something like dnsmasq or launchdns to resolve a Special Use Domain (described by RFC 6761) for local development like *.localhost or *.test

This is supported transparently via the gethostbyname and getaddrinfo C calls, but when replacing use of those APIs w/ Resolv, these resolutions no longer happen automatically.

This Gem patches the default behavior of the Resolv gem to include these additional resolvers in the default set, if they exist. (Using public APIs, there's no monkey-patching here.)

Installation

Add this line to your application's Gemfile:

gem 'resolv-macos'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install resolv-macos

Usage

No special usage instructions. The Gem will patch Resolv to automatically provide support for multiple resolvers on macOS, a la the default behavior for getaddrinfo. On platforms other than macOS, this gem does nothing.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/IoraHealth/resolv-macos.

License

The gem is available as open source under the terms of the MIT License.