gdc, ldc formulas for Homebrew?

[Andrew Pennebaker via Digitalmars-d]

Would someone kindly upload formulas for building and installing 
gdc and ldc with Homebrew?

http://brew.sh/

This way, Mac users could automate installing D language 
compilers with "brew install gdc" and/or "brew install ldc".

There's already a formula for dmd, for reference:

https://github.com/Homebrew/homebrew/blob/master/Library/Formula/dmd.rb