##UPDATE: you don't need this any more since Homebrew now has its own fishfish recipe.
Homebrew-fish: tap-ready formula for Fish's fish, the new fork of fish shell.
First, make sure you Homebrew version is 0.9 or above (you can check your brew version with brew --version).
After tapping this repo with
brew tap edc/homebrew-fishfish
You can install with just one line of command:
brew install fishfish
If you want to stay on the edge and use the latest and greatest from GitHub:
brew install --HEAD fishfish