ivanvc · March 31, 2011 21:01 · Dec 7, 2010 · Nov 3, 2010 · Sep 23, 2010 · Aug 16, 2010
diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -1,7 +1,7 @@
 #!/usr/bin/ruby
 #
 # This script installs to /usr/local only. To install elsewhere you can just
-# untar http://github.com/mxcl/homebrew/tarball/master anywhere you like.
+# untar https://github.com/mxcl/homebrew/tarball/master anywhere you like.
 #
 #
 # 30th March 2010:

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -126,7 +126,7 @@ def getc  # NOTE only tested on OS X
   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 http://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1'"
+  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
 
 ohai "Installation successful!"

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -125,7 +125,8 @@ def getc  # NOTE only tested on OS X
 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
-  system "/usr/bin/curl -sSfL http://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1"
+  # pipefail to cause the exit status from curl to propogate if it fails
+  system "/bin/bash -o pipefail -c '/usr/bin/curl -sSfL http://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1'"
 end
 
 ohai "Installation successful!"

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -88,7 +88,10 @@ def getc  # NOTE only tested on OS X
 puts "/usr/local/Library/Formula/..."
 puts "/usr/local/Library/Homebrew/..."
 
-chmods = %w(bin etc include lib lib/pkgconfig Library sbin share var . share/locale share/man share/man/man1 share/info share/doc share/aclocal).
+chmods = %w( . bin etc include lib lib/pkgconfig Library sbin share var 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| "/usr/local/#{d}" }.
             select{ |d| File.directory? d and not File.writable? d }
 chgrps = chmods.reject{ |d| File.stat(d).grpowned? }

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -52,9 +52,9 @@ def system *args
 
 def sudo *args
   args = if args.length > 1
-    args.unshift "sudo"
+    args.unshift "/usr/bin/sudo"
   else
-    "sudo #{args}"
+    "/usr/bin/sudo #{args}"
   end
   ohai *args
   system *args

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -88,7 +88,7 @@ def getc  # NOTE only tested on OS X
 puts "/usr/local/Library/Formula/..."
 puts "/usr/local/Library/Homebrew/..."
 
-chmods = %w(bin etc include lib libexec Library sbin share var . share/locale share/man share/man/man1 share/info share/doc share/aclocal).
+chmods = %w(bin etc include lib lib/pkgconfig Library sbin share var . share/locale share/man share/man/man1 share/info share/doc share/aclocal).
             map{ |d| "/usr/local/#{d}" }.
             select{ |d| File.directory? d and not File.writable? d }
 chgrps = chmods.reject{ |d| File.stat(d).grpowned? }

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -88,7 +88,7 @@ def getc  # NOTE only tested on OS X
 puts "/usr/local/Library/Formula/..."
 puts "/usr/local/Library/Homebrew/..."
 
-chmods = %w(bin etc include lib libexec Library sbin share var . share/locale share/man share/info share/doc share/aclocal).
+chmods = %w(bin etc include lib libexec Library sbin share var . share/locale share/man share/man/man1 share/info share/doc share/aclocal).
             map{ |d| "/usr/local/#{d}" }.
             select{ |d| File.directory? d and not File.writable? d }
 chgrps = chmods.reject{ |d| File.stat(d).grpowned? }

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -128,4 +128,4 @@ def getc  # NOTE only tested on OS X
 ohai "Installation successful!"
 
 warn "/usr/local/bin is not in your PATH." unless ENV['PATH'].split(':').include? '/usr/local/bin'
-warn "Now install Xcode." unless Kernel.system "/usr/bin/which -s gcc"
+warn "Now install Xcode: http://developer.apple.com/technologies/xcode.html" unless Kernel.system "/usr/bin/which -s gcc"
diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -102,9 +102,11 @@ def getc  # NOTE only tested on OS X
   puts *chgrps
 end
 
-puts
-puts "Press enter to continue"
-abort unless getc == 13
+if STDIN.tty?
+  puts
+  puts "Press enter to continue"
+  abort unless getc == 13
+end
 
 if File.directory? "/usr/local"
   sudo "/bin/chmod", "g+w", *chmods unless chmods.empty?

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -45,11 +45,9 @@ def ohai *args
 def warn warning
   puts "#{Tty.red}Warning#{Tty.reset}: #{warning.chomp}"
 end
-
-alias :system_orig :system
 
 def system *args
-  abort "Failed during: #{args.shell_s}" unless system_orig *args
+  abort "Failed during: #{args.shell_s}" unless Kernel.system *args
 end
 
 def sudo *args
@@ -128,4 +126,4 @@ def getc  # NOTE only tested on OS X
 ohai "Installation successful!"
 
 warn "/usr/local/bin is not in your PATH." unless ENV['PATH'].split(':').include? '/usr/local/bin'
-warn "Now install Xcode." unless system "/usr/bin/which gcc"
+warn "Now install Xcode." unless Kernel.system "/usr/bin/which -s gcc"
diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -1,7 +1,7 @@
 #!/usr/bin/ruby
 #
-# This script is for installation to /usr/local only. To install eleswhere
-# just untar http://github.com/mxcl/homebrew/tarball/master anywhere you like.
+# This script installs to /usr/local only. To install elsewhere you can just
+# untar http://github.com/mxcl/homebrew/tarball/master anywhere you like.
 #
 #
 # 30th March 2010:

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -90,7 +90,7 @@ def getc  # NOTE only tested on OS X
 puts "/usr/local/Library/Formula/..."
 puts "/usr/local/Library/Homebrew/..."
 
-chmods = %w(bin etc include lib sbin share var . share/locale share/man share/info share/doc share/aclocal).
+chmods = %w(bin etc include lib libexec Library sbin share var . share/locale share/man share/info share/doc share/aclocal).
             map{ |d| "/usr/local/#{d}" }.
             select{ |d| File.directory? d and not File.writable? d }
 chgrps = chmods.reject{ |d| File.stat(d).grpowned? }

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -1,16 +1,8 @@
 #!/usr/bin/ruby
 #
-# Download and execute this script in one-line with no temporary files:
+# This script is for installation to /usr/local only. To install eleswhere
+# just untar http://github.com/mxcl/homebrew/tarball/master anywhere you like.
 #
-#     ruby -e "$(curl http://gist.github.com/raw/323731/install_homebrew.rb)"
-#
-#
-# I deliberately didn't DRY /usr/local references into a variable as this
-# 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, please ensure you add a comment here that explains what the
-# changes are intended to do and how well you tested them.
 #
 # 30th March 2010:
 #   Added a check to make sure user is in the staff group. This was a problem
@@ -130,7 +122,7 @@ def getc  # NOTE only tested on OS X
 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
-  system "/usr/bin/curl -sfL http://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1"
+  system "/usr/bin/curl -sSfL http://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1"
 end
 
 ohai "Installation successful!"

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -72,7 +72,11 @@ def sudo *args
 
 def getc  # NOTE only tested on OS X
   system "/bin/stty raw -echo"
-  STDIN.getbyte
+  if RUBY_VERSION >= '1.8.7'
+    STDIN.getbyte
+  else
+    STDIN.getc
+  end
 ensure
   system "/bin/stty -raw echo"
 end

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -131,11 +131,5 @@ def getc  # NOTE only tested on OS X
 
 ohai "Installation successful!"
 
-if ENV['PATH'].split(':').include? '/usr/local/bin'
-  puts "Yay! Now learn to brew:"
-  puts
-  puts "    brew help"
-  puts
-else
-  warn "/usr/local/bin is not in your PATH"
-end
+warn "/usr/local/bin is not in your PATH." unless ENV['PATH'].split(':').include? '/usr/local/bin'
+warn "Now install Xcode." unless system "/usr/bin/which gcc"
diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -72,7 +72,7 @@ def sudo *args
 
 def getc  # NOTE only tested on OS X
   system "/bin/stty raw -echo"
-  STDIN.getc
+  STDIN.getbyte
 ensure
   system "/bin/stty -raw echo"
 end

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -71,10 +71,10 @@ def sudo *args
 end
 
 def getc  # NOTE only tested on OS X
-  system "stty raw -echo"
+  system "/bin/stty raw -echo"
   STDIN.getc
 ensure
-  system "stty -raw echo"
+  system "/bin/stty -raw echo"
 end
 
 ####################################################################### script

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -72,7 +72,7 @@ def sudo *args
 
 def getc  # NOTE only tested on OS X
   system "stty raw -echo"
-  STDIN.getc
+  STDIN.getbyte
 ensure
   system "stty -raw echo"
 end

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -1,5 +1,10 @@
 #!/usr/bin/ruby
 #
+# Download and execute this script in one-line with no temporary files:
+#
+#     ruby -e "$(curl http://gist.github.com/raw/323731/install_homebrew.rb)"
+#
+#
 # I deliberately didn't DRY /usr/local references into a variable as this
 # script will not "just work" if you change the destination directory. However
 # please feel free to fork it and make that possible.

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -75,10 +75,14 @@ def getc  # NOTE only tested on OS X
 ####################################################################### script
 abort "/usr/local/.git already exists!" if File.directory? "/usr/local/.git"
 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:
 
-unless `groups`.split.include?("staff")
-  ohai "The user #{`whoami`.strip} will be added to the staff group."
-end
+    dscl /Local/Default -append /Groups/staff GroupMembership $USER
+EOABORT
 
 ohai "This script will install:"
 puts "/usr/local/bin/brew"
@@ -103,10 +107,6 @@ def getc  # NOTE only tested on OS X
 puts "Press enter to continue"
 abort unless getc == 13
 
-unless `groups`.split.include?("staff")
-  sudo "dscl /Local/Default -append /Groups/staff GroupMembership #{`whoami`.strip}"
-end
-
 if File.directory? "/usr/local"
   sudo "/bin/chmod", "g+w", *chmods unless chmods.empty?
   # all admin users are in staff

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -76,6 +76,10 @@ def getc  # NOTE only tested on OS X
 abort "/usr/local/.git already exists!" if File.directory? "/usr/local/.git"
 abort "Don't run this as root!" if Process.uid == 0
 
+unless `groups`.split.include?("staff")
+  ohai "The user #{`whoami`.strip} will be added to the staff group."
+end
+
 ohai "This script will install:"
 puts "/usr/local/bin/brew"
 puts "/usr/local/Library/Formula/..."
@@ -86,10 +90,6 @@ def getc  # NOTE only tested on OS X
             select{ |d| File.directory? d and not File.writable? d }
 chgrps = chmods.reject{ |d| File.stat(d).grpowned? }
 
-unless `groups`.split.include?("staff")
-  ohai "The user #{`whoami`.strip} will be added to the staff group."
-end
-
 unless chmods.empty?
   ohai "The following directories will be made group writable:"
   puts *chmods

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -13,6 +13,12 @@
 #   versions of OS X. I cannot verify that for sure, and it was tested on
 #   10.6.2 using the Directory Service command line utility and my laptop.
 #
+#   My assumptions are:
+#     - you are running OS X 10.6.x
+#     - your machine is not managed as part of a group using networked
+#       Directory Services
+#     - you have not recently killed any baby seals or kittens
+#
 # 14th March 2010:
 #   Adapted CodeButler's fork: http://gist.github.com/331512
 #

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -7,6 +7,12 @@
 # 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.
 #
+# 30th March 2010:
+#   Added a check to make sure user is in the staff group. This was a problem
+#   for me, and I think it was due to me migrating my account over several
+#   versions of OS X. I cannot verify that for sure, and it was tested on
+#   10.6.2 using the Directory Service command line utility and my laptop.
+#
 # 14th March 2010:
 #   Adapted CodeButler's fork: http://gist.github.com/331512
 #
@@ -74,6 +80,10 @@ def getc  # NOTE only tested on OS X
             select{ |d| File.directory? d and not File.writable? d }
 chgrps = chmods.reject{ |d| File.stat(d).grpowned? }
 
+unless `groups`.split.include?("staff")
+  ohai "The user #{`whoami`.strip} will be added to the staff group."
+end
+
 unless chmods.empty?
   ohai "The following directories will be made group writable:"
   puts *chmods
@@ -87,6 +97,10 @@ def getc  # NOTE only tested on OS X
 puts "Press enter to continue"
 abort unless getc == 13
 
+unless `groups`.split.include?("staff")
+  sudo "dscl /Local/Default -append /Groups/staff GroupMembership #{`whoami`.strip}"
+end
+
 if File.directory? "/usr/local"
   sudo "/bin/chmod", "g+w", *chmods unless chmods.empty?
   # all admin users are in staff

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -8,15 +8,14 @@
 # changes are intended to do and how well you tested them.
 #
 # 14th March 2010:
-#   Adapted CodeButler's fork: http://gist.github.com/331512
+#   Adapted CodeButler's fork: http://gist.github.com/331512
 #
 
 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 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
@@ -26,7 +25,7 @@ class Array
   def shell_s
     cp = dup
     first = cp.shift
-    cp.map{ |arg| gsub " ", "\\ " }.unshift(first) * " "
+    cp.map{ |arg| arg.gsub " ", "\\ " }.unshift(first) * " "
   end
 end
 
@@ -73,28 +72,30 @@ def getc  # NOTE only tested on OS X
 chmods = %w(bin etc include lib sbin share var . share/locale share/man share/info share/doc share/aclocal).
             map{ |d| "/usr/local/#{d}" }.
             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
 
 puts
 puts "Press enter to continue"
 abort unless getc == 13
 
 if File.directory? "/usr/local"
   sudo "/bin/chmod", "g+w", *chmods unless chmods.empty?
+  # all admin users are in staff
+  sudo "/usr/bin/chgrp", "staff", *chgrps unless chgrps.empty?
 else
   sudo "/bin/mkdir /usr/local"
   sudo "/bin/chmod g+w /usr/local"
-end
-
-unless File.stat("/usr/local").grpowned?
-  warn "You are not a member of the group: %s" % `/usr/bin/stat -f%Sg /usr/local`
-  puts "This is the group of /usr/local."
-  puts "Type groups to see what groups you are in."
-  abort "See the Homebrew wiki for alternative installation routes."
+  # the group is set to wheel by default for some reason
+  sudo "/usr/bin/chgrp staff /usr/local"
 end
 
 Dir.chdir "/usr/local" do

diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -7,6 +7,9 @@
 # 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.
 #
+# 14th March 2010:
+#   Adapted CodeButler's fork: http://gist.github.com/331512
+#
 
 module Tty extend self
   def blue; bold 34; end
@@ -19,23 +22,36 @@ def underline n; escape "4;#{n}" end
   def escape n; "\033[#{n}m" if STDOUT.tty? end
 end
 
-def ohai s
-  puts "#{Tty.blue}==>#{Tty.white} #{s}#{Tty.reset}"
+class Array
+  def shell_s
+    cp = dup
+    first = cp.shift
+    cp.map{ |arg| gsub " ", "\\ " }.unshift(first) * " "
+  end
 end
 
-def sudo *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
+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 opoo warning
-  puts "#{Tty.red}Warning#{Tty.reset}: #{warning}"
+alias :system_orig :system
+
+def system *args
+  abort "Failed during: #{args.shell_s}" unless system_orig *args
+end
+
+def sudo *args
+  args = if args.length > 1
+    args.unshift "sudo"
+  else
+    "sudo #{args}"
+  end
+  ohai *args
+  system *args
 end
 
 def getc  # NOTE only tested on OS X
@@ -47,6 +63,7 @@ def getc  # NOTE only tested on OS X
 
 ####################################################################### script
 abort "/usr/local/.git already exists!" if File.directory? "/usr/local/.git"
+abort "Don't run this as root!" if Process.uid == 0
 
 ohai "This script will install:"
 puts "/usr/local/bin/brew"
@@ -73,11 +90,17 @@ def getc  # NOTE only tested on OS X
   sudo "/bin/chmod g+w /usr/local"
 end
 
+unless File.stat("/usr/local").grpowned?
+  warn "You are not a member of the group: %s" % `/usr/bin/stat -f%Sg /usr/local`
+  puts "This is the group of /usr/local."
+  puts "Type groups to see what groups you are in."
+  abort "See the Homebrew wiki for alternative installation routes."
+end
+
 Dir.chdir "/usr/local" do
-  tarball = "http://github.com/mxcl/homebrew/tarball/master"
-  ohai "Extracting: #{tarball}"
+  ohai "Downloading and Installing Homebrew..."
   # -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"
+  system "/usr/bin/curl -sfL http://github.com/mxcl/homebrew/tarball/master | /usr/bin/tar xz -m --strip 1"
 end
 
 ohai "Installation successful!"
@@ -88,5 +111,5 @@ def getc  # NOTE only tested on OS X
   puts "    brew help"
   puts
 else
-  opoo "/usr/local/bin is not in your PATH"
+  warn "/usr/local/bin is not in your PATH"
 end
diff --git a/install_homebrew.rb b/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
@@ -16,28 +16,37 @@ def reset; escape 0; end
   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
   puts "#{Tty.blue}==>#{Tty.white} #{s}#{Tty.reset}"
 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 @@ def opoo warning
 
 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
diff --git a/install_homebrew.rb b/install_homebrew.rb
@@ -0,0 +1,80 @@
+#!/usr/bin/ruby
+#
+# I deliberately didn't DRY /usr/local references into a variable as this
+# 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.
+#
+
+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 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
+end
+
+def ohai s
+  puts "#{Tty.blue}==>#{Tty.white} #{s}#{Tty.reset}"
+end
+
+def sudo *params
+  params.unshift "sudo"
+  ohai params.map{ |p| p.gsub ' ', '\\ ' } * ' '
+  system *params
+end
+
+def opoo warning
+  puts "#{Tty.red}Warning#{Tty.reset}: #{warning}"
+end
+
+####################################################################### script
+require 'fileutils'
+include  FileUtils
+
+#abort "/usr/local/.git already exists!" if File.directory? '/usr/local/.git'
+
+ohai "This script will install:"
+puts "/usr/local/bin/brew"
+puts "/usr/local/Library/Formula/..."
+puts "/usr/local/Library/Homebrew/..."
+
+chmods = %w(bin etc include lib sbin share var . share/locale share/man share/info share/doc share/aclocal).
+            map{ |d| "/usr/local/#{d}" }.
+            select{ |d| File.directory? d and not File.writable? d }
+
+unless chmods.empty?
+  ohai "The following directories will be made group writable:"
+  puts *chmods
+end
+
+puts
+puts "Press enter to continue"
+abort if gets != "\n"
+
+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'
+end
+
+cd '/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"
+
+if ENV['PATH'].split(':').include? '/usr/local/bin'
+  puts "Now try: brew help"
+else
+  opoo "/usr/local/bin is not in your PATH"
+end