install_homebrew.rb

@@ -4,8 +4,8 @@
 # script will not "just work" if you change the destination directory. However
 # please feel free to fork it and make that possible.
 #
-# If you do fork ensure you add a comment here that explains what the changes
-# are intended to do and how well you tested them.
+# If you do fork, please ensure you add a comment here that explains what the
+# changes are intended to do and how well you tested them.
 #
 
 module Tty extend self
@@ -16,7 +16,7 @@ module Tty extend self
   def underline; underline 39; 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
+  def escape n; "\033[#{n}m" if STDOUT.tty? end
 end
 
 def ohai s
@@ -24,20 +24,29 @@ def ohai s
 end
 
 def sudo *params
-  params.unshift "sudo"
-  ohai params.map{ |p| p.gsub ' ', '\\ ' } * ' '
-  system *params
+  if params.length == 1
+    cmd = "sudo #{params.first}"
+    ohai cmd
+    system cmd
+  else
+    ohai "sudo" + params.map{ |p| p.gsub ' ', '\\ ' } * ' '
+    system "sudo", *params
+  end
 end
 
 def opoo warning
   puts "#{Tty.red}Warning#{Tty.reset}: #{warning}"
 end
 
-####################################################################### script
-require 'fileutils'
-include  FileUtils
+def getc  # NOTE only tested on OS X
+  system "stty raw -echo"
+  STDIN.getc
+ensure
+  system "stty -raw echo"
+end
 
-#abort "/usr/local/.git already exists!" if File.directory? '/usr/local/.git'
+####################################################################### script
+abort "/usr/local/.git already exists!" if File.directory? "/usr/local/.git"
 
 ohai "This script will install:"
 puts "/usr/local/bin/brew"
@@ -55,26 +64,29 @@ end
 
 puts
 puts "Press enter to continue"
-abort if gets != "\n"
+abort unless getc == 13
 
-if File.directory? '/usr/local'
+if File.directory? "/usr/local"
   sudo "/bin/chmod", "g+w", *chmods unless chmods.empty?
 else
-  sudo "/bin/mkdir", '/usr/local'
-  sudo "/bin/chmod", "g+w", '/usr/local'
+  sudo "/bin/mkdir /usr/local"
+  sudo "/bin/chmod g+w /usr/local"
 end
 
-cd '/usr/local' do
+Dir.chdir "/usr/local" do
   tarball = "http://github.com/mxcl/homebrew/tarball/master"
   ohai "Extracting: #{tarball}"
   # -m to stop tar erroring out if it can't modify the mtime for root owned directories
   system "/usr/bin/curl -#L #{tarball} | /usr/bin/tar xz -m --strip 1"
 end
 
-ohai "Installation successful"
+ohai "Installation successful!"
 
 if ENV['PATH'].split(':').include? '/usr/local/bin'
-  puts "Now try: brew help"
+  puts "Yay! Now learn to brew:"
+  puts
+  puts "    brew help"
+  puts
 else
   opoo "/usr/local/bin is not in your PATH"
 end