Add the start of an installer

osx/install.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+
+if which tput >/dev/null 2>&1; then
+  ncolors=$(tput colors)
+fi
+if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then
+  RED="$(tput setaf 1)"
+  GREEN="$(tput setaf 2)"
+  YELLOW="$(tput setaf 3)"
+  BLUE="$(tput setaf 4)"
+  BOLD="$(tput bold)"
+  NORMAL="$(tput sgr0)"
+else
+  RED=""
+  GREEN=""
+  YELLOW=""
+  BLUE=""
+  BOLD=""
+  NORMAL=""
+fi
+
+set -e
+
+printf "Installing Homebrew..."
+if [ ! -d "/usr/local/Homebrew" ]; then
+  /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+else
+  printf "${YELLOW}already installed!${NORMAL}\n"
+fi
+
+brew_packages=(
+  'tree'
+  'openssl')
+
+for package in "${brew_packages[@]}"
+do
+  printf "Installing $package..."
+  ret=$(brew list | awk /$package/)
+  if [ $ret == $package ]; then
+    printf "${YELLOW}already installed!${NORMAL}\n"
+  else
+    eval "brew install $package"
+    printf \n
+  fi
+done