Untitled

#!/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.

 

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 badlibs

  @badlibs ||= begin

    Dir['/usr/local/lib/*.dylib'].select do |dylib|

      ENV['dylib'] = dylib

      File.file? dylib and not File.symlink? dylib and `/usr/bin/file "$dylib"` =~ /shared library/

    end

  end

end

 

####################################################################### script

abort "/usr/local/.git already exists!" unless Dir["/usr/local/.git/*"].empty?

abort "Don't run this as root!" if Process.uid == 0

abort <<-EOABORT unless `groups`.split.include? "staff"

This script requires the user #{ENV['USER']} to be in the staff group. If this

sucks for you then you can install Homebrew in your home directory or however

you please; please refer to the website. If you still want to use this script

the following command should work:

 

    dscl /Local/Default -append /Groups/staff GroupMembership $USER

EOABORT

 

ohai "This script will install:"

puts "/usr/local/bin/brew"

puts "/usr/local/Library/Formula/..."

puts "/usr/local/Library/Homebrew/..."

 

chmods = %w( share/man lib/pkgconfig var/log share/locale

             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| "/usr/local/#{d}" }

root_dirs = []

%w(bin Cellar etc include lib Library sbin share var .git).each do |d|

  d = "/usr/local/#{d}"

  if File.directory? d then chmods else root_dirs end << d

end

chmods = chmods.select{ |d| File.directory? d and not File.writable? 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}staff#{Tty.reset}:"

  puts *chgrps

end

 

 

if STDIN.tty?

  puts

  puts "Press enter to continue"

  abort unless getc == 13

end

 

sudo "/bin/mkdir /usr/local" unless File.directory? "/usr/local"

sudo "/bin/chmod o+w /usr/local"

begin

  sudo "/bin/chmod", "g+w", *chmods unless chmods.empty?

  sudo "/usr/bin/chgrp", "staff", *chgrps unless chgrps.empty?

  system "/bin/mkdir", *root_dirs unless root_dirs.empty?

 

  Dir.chdir "/usr/local" do

    ohai "Downloading and Installing Homebrew..."

    # -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

    system "/bin/bash -o pipefail -c '/usr/bin/curl -sSfL https://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1'"

  end

ensure

  # we reset the permissions of /usr/local because we want to minimise the

  # amount of fiddling we do to the system. Some tools require /usr/local to

  # be by non-writable for non-root users.

  sudo "/bin/chmod o-w /usr/local"

end

 

warn "/usr/local/bin is not in your PATH." unless ENV['PATH'].split(':').include? '/usr/local/bin'

warn "Now install Xcode: http://developer.apple.com/technologies/xcode.html" unless Kernel.system "/usr/bin/which -s gcc"

 

unless badlibs.empty?

  warn "The following *evil* dylibs exist in /usr/local/lib"

  puts "They may break builds or worse. You should consider deleting them:"

  puts *badlibs

end

 

ohai "Installation successful!"

puts "Now type: brew help"