Rewrite setup file using Ruby

osx/casks

@@ -0,0 +1,11 @@
+adium
+alfred
+dropbox
+flux
+iterm2
+macvim
+1password
+spectacle
+spotify
+the-unarchiver
+transmission

osx/packages

@@ -0,0 +1,8 @@
+caskroom/cask/brew-cask
+vim
+git
+ag
+tmux
+openssl
+python
+tree

osx/setup.rb

@@ -0,0 +1,111 @@
+#!/usr/bin/env ruby
+
+def info(str)
+  STDERR.puts str
+end
+
+module OS
+  module_function
+
+  def mac?
+    RUBY_PLATFORM.downcase.include? 'darwin'
+  end
+end
+
+module Homebrew
+  module_function
+
+  def installed?
+    system 'command -v brew >/dev/null 2>&1'
+  end
+
+  def install
+    system 'ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"'
+  end
+
+  def pkg_installed?(pkg)
+    system "brew list #{pkg} >/dev/null 2>&1"
+  end
+
+  def install_pkg(pkg)
+    system "brew install #{pkg}"
+  end
+
+  def cleanup
+    system 'brew cleanup >/dev/null 2>&1'
+  end
+end
+
+module Cask
+  module_function
+
+  def pkg_installed?(pkg)
+    system "brew cask list #{pkg} >/dev/null 2>&1"
+  end
+
+  def install_pkg(pkg)
+    system "brew cask install --appdir=/Applications #{pkg}"
+  end
+
+  def cleanup
+    system 'brew cask cleanup >/dev/null 2>&1'
+  end
+end
+
+unless OS.mac?
+  abort 'This script only works on Mac OS X'
+end
+
+if Homebrew.installed?
+  info 'Homebrew is already installed, skipping'
+else
+  info 'Installing Homebrew...'
+
+  if Homebrew.install
+    info 'Homebrew installed'
+  else
+    abort 'Homebrew was not installed due to a problem'
+  end
+end
+
+packages = File.readlines('packages').map(&:strip)
+casks = File.readlines('casks').map(&:strip)
+
+info 'Installing Homebrew packages...'
+
+packages.each do |pkg|
+  if Homebrew.pkg_installed?(pkg)
+    info "#{pkg} is already installed, skipping"
+  else
+    info "Installing #{pkg}"
+
+    if Homebrew.install_pkg(pkg) && Homebrew.pkg_installed?(pkg)
+      info "#{pkg} installed"
+    else
+      abort "#{pkg} was not installed due to a problem"
+    end
+  end
+end
+
+info 'Installing cask packages...'
+
+casks.each do |pkg|
+  if Cask.pkg_installed?(pkg)
+    info "#{pkg} is already installed, skipping"
+  else
+    info "Installing #{pkg}"
+
+    if Cask.install_pkg(pkg) && Cask.pkg_installed?(pkg)
+      info "#{pkg} installed"
+    else
+      abort "#{pkg} was not installed due to a problem"
+    end
+  end
+end
+
+info 'Cleaning old packages...'
+
+Homebrew.cleanup
+Cask.cleanup
+
+info 'Done!'