install

install

Homebrew

Open Terminal.app/iTerm.app and enter:

ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go)
It will ask for your password at some point, get EUP!

If you're on OS X 10.7 or 10.8, install the Apple GCC package from Terminal.app/iTerm.app:

brew tap homebrew/homebrew-dupes
brew install apple-gcc42
Symlinks

In /usr/local/bin, a simple ls *4.2 will list 6 commands, symlinks these to the same place but without the 4.2 suffix. I.e.

ln -s /usr/local/bin/gcc-4.2 /usr/local/bin/gcc
Additional symlinks needed:

ln -s /usr/local/bin/gcc-4.2 /usr/local/bin/cc
ln -s /usr/local/bin/gcc-4.2 /usr/local/bin/g++ # gem unf_ext uses g++
Homebrew packages

You need the following packages from Homebrew:

chruby

brew install chruby
sudo mkdir -p /opt/rubies
sudo chown `whoami` /opt/rubies
You'll need to add these to your profile (~/.bash_profile or ~/.zshrc):

source /usr/local/opt/chruby/share/chruby/chruby.sh
source /usr/local/opt/chruby/share/chruby/auto.sh
ruby-build

brew install ruby-build
Installing ruby 1.8.7-p302

ruby-build 1.8.7-p302 /opt/rubies/1.8.7-p302
After ruby 1.8.7-p302 is installed, open a new shell/tab so that chruby loads up the correct ruby before you pull down the dependencies.

node

brew install node
Other useful utilities that make managing your Mac much easier:

brew install wget tree watch htop