go - autodetects build environment now

Formula/go.rb

@@ -15,47 +15,18 @@ class Go <Formula
 
   skip_clean 'bin'
 
-  def which_arch
-    Hardware.is_64_bit? ? 'amd64' : '386'
-  end
-
   def install
     ENV.j1 # https://github.com/mxcl/homebrew/issues/#issue/237
     prefix.install %w[src include test doc misc lib favicon.ico]
     Dir.chdir prefix
     mkdir %w[pkg bin]
 
-    ENV['GOROOT'] = Dir.getwd
-    ENV['GOBIN'] = bin
-    ENV['GOARCH'] = which_arch
-    ENV['GOOS'] = 'darwin'
-
-    ENV.prepend 'PATH', ENV['GOBIN'], ':'
-
     Dir.chdir 'src' do
       system "./all.bash"
-      # Keep the makefiles - https://github.com/mxcl/homebrew/issues/issue/1404
     end
 
+    # Keep the makefiles - https://github.com/mxcl/homebrew/issues/issue/1404
     Dir['src/*'].each{|f| rm_rf f unless f.match(/^src\/(pkg|Make)/) }
     rm_rf %w[include test]
   end
-
-  def caveats
-    <<-EOS.undent
-      The official Go code repository uses mercurial, but a reasonably
-      up-to-date git mirror is available at https://github.com/tav/go.git.
-      To use the git mirror for Go builds, use the --use-git-head option.
-
-      In order to use Go, set the following in your ~/.profile:
-
-        export GOROOT=`brew --prefix go`
-        export GOBIN=#{HOMEBREW_PREFIX}/bin
-        export GOARCH=#{which_arch}
-        export GOOS=darwin
-
-      Presumably at some point the Go developers won't require us to
-      mutilate our shell environments in order to compile Go code...
-    EOS
-  end
 end