Bootstrap a new Mac just as I like it

bootstrap.sh

#!/bin/bash
#
#  bootstrap.sh
#
#  Bootstrap a new Mac.
#

set -e

declare -a BREWS
BREWS=(
  autojump
  boot2docker
  docker
  gcc
  go
  mercurial
  nmap
  trash
)

declare -a CASKS
CASKS=(
  alfred
  dropbox
  google-chrome
  iterm2
  juliastudio
  moom
  onepassword
  rstudio
  spotify
  things
  transmission
  vagrant
  vlc
  xquartz
)

function has_exec() {
  /usr/bin/which -s "$1"
}

function install_homebrew() {
  echo 'Installing homebrew'
  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
}

function has_brew_cask() {
  test -d /usr/local/Library/Taps/caskroom/homebrew-cask
}

function install_brew_cask() {
  echo 'Installing Cask'
  brew install caskroom/cask/brew-cask
}

function has_cask() {
  brew cask list | fgrep -q "$1"
}

function install_cask() {
  brew cask install "$1"
}

function has_dotfiles() {
  test -d ~/.dotfiles && test -f ~/.myname
}

function install_dotfiles() {
  echo 'Installing dotfiles'
  git clone [email protected]:larsyencken/dotfiles ~/.dotfiles
  (cd ~/.dotfiles && ./init_config.py)
}

function has_vim() {
  test -x /usr/local/bin/vim
}

function install_vim() {
  echo 'Installing vim'
  brew install vim --with-lua --with-luajit
}

function has_dotvim() {
  test -d ~/.vim
}

function install_dotvim() {
  echo 'Installing dotvim'
  git clone --recursive https://github.com/larsyencken/dotvim ~/.vim
  ln -s ~/.vim/vimrc ~/.vimrc
}

function install_pyenv() {
  brew install pyenv
  pyenv install 2.7.8
  pyenv install 3.4.1
  pyenv global 3.4.1 2.7.8
}

function has_brew() {
  brew list | fgrep -q "$1"
}

function install_brews() {
  for pkg in ${BREWS[*]}; do
    if ! has_brew $pkg; then
      echo "Installing $pkg"
      brew install $pkg
    fi
  done
}

function install_casks() {
  has_brew_cask || install_brew_cask
  for pkg in ${CASKS[*]}; do
    if ! has_cask $pkg; then
      echo "Installing $pkg"
      install_cask $pkg
    fi
  done
}

function has_ssh_key() {
  test -f ~/.ssh/id_rsa.pub
}

function gen_ssh_key() {
  ssh-keygen -f ~/.ssh/id_rsa
}

has_exec brew || install_homebrew
has_exec git || brew install git
has_ssh_key || gen_ssh_key
has_dotfiles || install_dotfiles
has_vim || install_vim
has_dotvim || install_dotvim
has_exec pyenv || install_pyenv
install_brews
install_casks