Development environment installation script for OS X

setup.sh

#!/usr/bin/env bash

# Development environmet installation script for OS X
# This script will
# - Install Homebrew (http://mxcl.github.com/homebrew/)
# - Install GIT
# - Run GIT/GitHub setup script (https://github.com/help/setup)
# - Setups default global .gitignore file
# - Install Oh-My-ZSH (https://github.com/robbyrussell/oh-my-zsh)
# - Install Ruby Version Manager (http://beginrescueend.com/)
# - Create Sublime Text 2 cmd line symlink if editor is installed
# - Set group of OS X defaults

# Install homebrew 
echo "Installing Homebrew"
/usr/bin/ruby -e "$(/usr/bin/curl -fksSL https://raw.github.com/mxcl/homebrew/master/Library/Contributions/install_homebrew.rb)"

echo "Installing GIT"
/usr/local/bin/brew install git

# Cloning and running GitHub setup.sh
git clone https://github.com/help/setup.git github-setup
github-setup/setup.sh
rm -rf github-setup

# Create global .gitignore
echo "Creating global .gitignore"
if [ -f ~/.gitignore ]; then
  read -n1 -p "Overwrite ~/.gitignore? "
  echo ""
else
  REPLY=y
fi
if [[ $REPLY = [yY] ]]; then
  cat >~/.gitignore <<EOL
.DS_Store
.Trashes
*~
*.o
*.so
*.log
EOL
  git config --global core.excludesfile ~/.gitignore
fi

# Install oh-my-zsh
echo "Installing Oh-My-ZSH"
curl -L https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh | sh

# Install RVM
echo "Installing Ruby Version Manager"
curl -L https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer | bash -s stable

# Create subl symlink if Sublime Text 2 is installed
if [[ -f "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" && ! -f /usr/bin/subl ]]; then
  echo "Symlinking Sublime Text 2 command line binary"
  echo "Enter your password to create /usr/bin/subl symlink"
  sudo ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" /usr/bin/subl
fi

# Set OS X defaults
echo "Setting OS X defaults"
# (Picked from https://github.com/mathiasbynens/dotfiles/blob/master/.osx)
# Show remaining battery time; hide percentage
defaults write com.apple.menuextra.battery ShowPercent -string "NO"
defaults write com.apple.menuextra.battery ShowTime -string "YES"
# Expand save panel by default
defaults write NSGlobalDomain NSNavPanelExpandedStateForSaveMode -bool true
# Expand print panel by default
defaults write NSGlobalDomain PMPrintingExpandedStateForPrint -bool true
# Disable Resume system-wide
defaults write NSGlobalDomain NSQuitAlwaysKeepsWindows -bool false
# Show all filename extensions in Finder
defaults write NSGlobalDomain AppleShowAllExtensions -bool true
# Avoid creating .DS_Store files on network volumes
defaults write com.apple.desktopservices DSDontWriteNetworkStores -bool true
# Show indicator lights for open applications in the Dock
defaults write com.apple.dock show-process-indicators -bool true
# Enable the 2D Dock
defaults write com.apple.dock no-glass -bool true
# Disable all the other Ping stuff in iTunes
defaults write com.apple.iTunes disablePing -bool true
# Disable send and reply animations in Mail.app
defaults write com.apple.Mail DisableReplyAnimations -bool true
defaults write com.apple.Mail DisableSendAnimations -bool true
# Kill affected applications
for app in Finder Dock Mail iTunes SystemUIServer; do killall "$app" > /dev/null 2>&1; done