Updated formula: sbcl 1.0.43

Built from source while automatically download and use the official
1.0.29 binary to bootstrap.

Library/Formula/sbcl.rb

@@ -1,22 +1,50 @@
 require 'formula'
-require 'hardware'
 
-class Sbcl <Formula
-  if snow_leopard_64?
-    url 'http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.29/sbcl-1.0.29-x86_64-darwin-binary-r2.tar.bz2'
-    md5 '47c99c60ec44e57070807c0890ba1c90'
-  else
-    url 'http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.29/sbcl-1.0.29-x86-darwin-binary-r2.tar.bz2'
-    md5 '6e6b027a5fd05ef0c8faee30d89ffe54'
-  end
+# The official binary for 1.0.29 is used to bootstrap the latest version.
+class SbclBinary < Formula
+  url 'http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.29/sbcl-1.0.29-x86-darwin-binary-r2.tar.bz2'
+  md5 '6e6b027a5fd05ef0c8faee30d89ffe54'
   version '1.0.29'
+end
+
+class Sbcl < Formula
+  url 'http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.43/sbcl-1.0.43-source.tar.bz2'
   homepage 'http://www.sbcl.org/'
+  md5 '2b125844371881a99cfdf63c286e74cd'
 
   skip_clean 'bin'
   skip_clean 'lib'
 
   def install
-    ENV['INSTALL_ROOT'] = prefix
-    system "sh install.sh"
+    original_path = pwd
+    puts "original_path=#{original_path}"
+    mktemp do
+      # install 1.0.29 to a temporary location
+      binary_path = pwd
+      SbclBinary.new('sbcl-binary').brew do
+        install_sbcl binary_path
+      end
+      # build and install 1.0.43
+      cd original_path do
+        system "env",
+               "PATH=#{binary_path}/bin:#{ENV['PATH']}",
+               "SBCL_HOME=#{binary_path}/lib/sbcl",
+               "sh",
+               "make.sh",
+               "--prefix=#{prefix}"
+        cd 'tests' do
+          system "sh run-tests.sh"
+        end
+        install_sbcl prefix
+      end
+    end
   end
+
+  def install_sbcl path
+    system "env",
+           "INSTALL_ROOT=#{path}",
+           "sh",
+           "install.sh"
+  end
+
 end