#!/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby # This script installs to /usr/local only. To install elsewhere you can just # untar https://github.com/mxcl/homebrew/tarball/master anywhere you like or # change the value of HOMEBREW_PREFIX. HOMEBREW_PREFIX = '/usr/local'  module Tty extend self   def blue; bold 34; end   def white; bold 39; end   def red; underline 31; end   def reset; escape 0; end   def bold n; escape "1;#{n}" end   def underline n; escape "4;#{n}" end   def escape n; "\033[#{n}m" if STDOUT.tty? end end  class Array   def shell_s     cp = dup     first = cp.shift     cp.map{ |arg| arg.gsub " ", "\\ " }.unshift(first) * " "   end end  def ohai *args   puts "#{Tty.blue}==>#{Tty.white} #{args.shell_s}#{Tty.reset}" end  def warn warning   puts "#{Tty.red}Warning#{Tty.reset}: #{warning.chomp}" end  def system *args   abort "Failed during: #{args.shell_s}" unless Kernel.system *args end  def sudo *args   args = if args.length > 1     args.unshift "/usr/bin/sudo"   else     "/usr/bin/sudo #{args.first}"   end   ohai *args   system *args end  def getc  # NOTE only tested on OS X   system "/bin/stty raw -echo"   if RUBY_VERSION >= '1.8.7'     STDIN.getbyte   else     STDIN.getc   end ensure   system "/bin/stty -raw echo" end  def wait_for_user   puts   puts "Press ENTER to continue or any other key to abort"   c = getc   # we test for \r and \n because some stuff does \r instead   abort unless c == 13 or c == 10 end  def macos_version   @macos_version ||= `/usr/bin/sw_vers -productVersion`.chomp[/10\.\d+/] end  def git   @git ||= if ENV['GIT'] and File.executable? ENV['GIT']     ENV['GIT']   elsif Kernel.system '/usr/bin/which -s git'     'git'   else     s = `xcrun -find git 2>/dev/null`.chomp     s if $? and not s.empty?   end    return unless @git   # Github only supports HTTPS fetches on 1.7.10 or later:   # https://help.github.com/articles/https-cloning-errors   `#{@git} --version` =~ /git version (\d\.\d+\.\d+)/   return if $1.nil? or $1 < "1.7.10"    @git end  # The block form of Dir.chdir fails later if Dir.CWD doesn't exist which I # guess is fair enough. Also sudo prints a warning message for no good reason Dir.chdir "/usr"  ####################################################################### script abort "MacOS too old, see: https://github.com/mistydemeo/tigerbrew" if macos_version < "10.5" abort "Don't run this as root!" if Process.uid == 0 abort <<-EOABORT unless `groups`.split.include? "admin" This script requires the user #{ENV['USER']} to be an Administrator. If this sucks for you then you can install Homebrew in your home directory or however you please; please refer to our homepage. If you still want to use this script set your user to be an Administrator in System Preferences or `su' to a non-root user with Administrator privileges. EOABORT abort <<-EOABORT unless Dir["#{HOMEBREW_PREFIX}/.git/*"].empty? It appears Homebrew is already installed. If your intent is to reinstall you should do the following before running this installer again:     rm -rf #{HOMEBREW_PREFIX}/Cellar #{HOMEBREW_PREFIX}/.git && brew cleanup EOABORT # Tests will fail if the prefix exists, but we don't have execution # permissions. Abort in this case. abort <<-EOABORT if File.directory? HOMEBREW_PREFIX and not File.executable? HOMEBREW_PREFIX The Homebrew prefix, #{HOMEBREW_PREFIX}, exists but is not searchable. If this is not intentional, please restore the default permissions and try running the installer again:     sudo chmod 755 #{HOMEBREW_PREFIX} EOABORT  ohai "This script will install:" puts "#{HOMEBREW_PREFIX}/bin/brew" puts "#{HOMEBREW_PREFIX}/Library/..." puts "#{HOMEBREW_PREFIX}/share/man/man1/brew.1"  chmods = %w( . bin etc include lib lib/pkgconfig Library sbin share var var/log share/locale share/man              share/man/man1 share/man/man2 share/man/man3 share/man/man4              share/man/man5 share/man/man6 share/man/man7 share/man/man8              share/info share/doc share/aclocal ).             map{ |d| "#{HOMEBREW_PREFIX}/#{d}" }.             select{ |d| File.directory? d and (not File.readable? d or not File.writable? d or not File.executable? d) } chgrps = chmods.reject{ |d| File.stat(d).grpowned? }  unless chmods.empty?   ohai "The following directories will be made group writable:"   puts *chmods end unless chgrps.empty?   ohai "The following directories will have their group set to #{Tty.underline 39}admin#{Tty.reset}:"   puts *chgrps end  wait_for_user if STDIN.tty?  if File.directory? HOMEBREW_PREFIX   sudo "/bin/chmod", "g+rwx", *chmods unless chmods.empty?   sudo "/usr/bin/chgrp", "admin", *chgrps unless chgrps.empty? else   sudo "/bin/mkdir #{HOMEBREW_PREFIX}"   sudo "/bin/chmod g+rwx #{HOMEBREW_PREFIX}"   # the group is set to wheel by default for some reason   sudo "/usr/bin/chgrp admin #{HOMEBREW_PREFIX}" end  if macos_version > "10.8"   unless File.exist? "/Library/Developer/CommandLineTools/usr/bin/clang"     ohai "Installing the Command Line Tools (expect a GUI popup):"     sudo "/usr/bin/xcode-select", "--install"     puts "Press any key when the installation has completed."     getc   end end  ohai "Downloading and installing Homebrew..." Dir.chdir HOMEBREW_PREFIX do   if git     # we do it in four steps to avoid merge errors when reinstalling     system git, "init", "-q"     system git, "remote", "add", "origin", "https://github.com/mxcl/homebrew"      args = git, "fetch", "origin", "master:refs/remotes/origin/master", "-n"     args << "--depth=1" if ARGV.include? "--fast"     system *args      system git, "reset", "--hard", "origin/master"   else     # -m to stop tar erroring out if it can't modify the mtime for root owned directories     # pipefail to cause the exit status from curl to propogate if it fails     # we use -k for curl because Leopard has a bunch of bad SSL certificates     curl_flags = "fsSL"     curl_flags << "k" if macos_version <= "10.5"     system "/bin/bash -o pipefail -c '/usr/bin/curl -#{curl_flags} https://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1'"   end end  warn "#{HOMEBREW_PREFIX}/bin is not in your PATH." unless ENV['PATH'].split(':').include? "#{HOMEBREW_PREFIX}/bin"  if macos_version < "10.9" and macos_version > "10.6"   `/usr/bin/cc --version 2> /dev/null` =~ %r[clang-(\d{2,})]   version = $1.to_i   warn %{Install the "Command Line Tools for Xcode": http://connect.apple.com} if version < 425 else   warn "Now install Xcode: https://developer.apple.com/xcode/" unless File.exist? "/usr/bin/cc" end  ohai "Installation successful!" puts "You should run `brew doctor' *before* you install anything." puts "Now type: brew help"