This is a shell script I use to bootstrap new dev machines (OSX) and servers (Ubuntu). It will ensure everything I need for python, node.js, and git is installed. After running bootstrap, I just need to clone my project and run the initialization script in my project to complete the setup.

bootstrap.sh

#!/bin/bash
# expects python is installed with OS distribution

# single line command for execution
# wget -O - <RAW_URL> | bash

# determine environment
if hash apt-get 2>/dev/null; then
  echo "Bootstrapping UBUNTU"
  UBUNTU=true
  # update apt-get and install a C compiler
  sudo apt-get -y update && sudo apt-get -y upgrade
  sudo apt-get -y install gcc
else
  echo "Bootstrapping OSX"
  # on OSX we use brew as the application repo
  ruby -e "$(curl -fsSkL raw.github.com/mxcl/homebrew/go)"
  brew doctor
  OSX=true
fi

# install python, when necessary
if [ $UBUNTU ]; then
  sudo apt-get -y install python-dev python-setuptools
fi

# setup pip, virtualenv, and virtualenvwrapper
sudo easy_install pip
sudo pip install virtualenv
sudo pip install virtualenvwrapper
mkdir $HOME/.virtualenvs

# install git
if [ $UBUNTU ]; then
  sudo apt-get -y install git
fi
if [ $OSX ]; then
  brew install git
fi

# install node and npm
if [ $UBUNTU ]; then
  sudo apt-get -y install nodejs npm
  sudo ln -s /usr/bin/nodejs /usr/bin/node
fi
if [ $OSX ]; then
  brew install node npm
fi