Only time the build, not the download too

Library/Homebrew/brew.h.rb

@@ -150,16 +150,19 @@ def install f
       puts "Type `exit' to return and finalize the installation"
       puts "Install to this prefix: #{f.prefix}"
       interactive_shell
+      nil
     elsif ARGV.include? '--help'
       system './configure --help'
       exit $?
     else
       f.prefix.mkpath
+      beginning=Time.now
       f.install
       %w[README ChangeLog COPYING LICENSE COPYRIGHT AUTHORS].each do |file|
         FileUtils.mv "#{file}.txt", file rescue nil
         f.prefix.install file rescue nil
       end
+      return Time.now-beginning
     end
   end
 end

bin/brew

@@ -99,9 +99,8 @@ begin
       require 'keg'
       f=ARGV.formulae.shift
       raise "#{f.name} is already installed" if f.installed? unless ARGV.force?
-      BEGINNING=Time.now
       begin
-        install f
+        build_time=install f
         ohai "Caveats", f.caveats, ''
         ohai 'Finishing up'
         clean f
@@ -111,7 +110,9 @@ begin
         f.prefix.rmtree if f.prefix.directory?
         raise
       end
-      puts "#{f.prefix}: #{f.prefix.abv}, built in #{pretty_duration Time.now-BEGINNING}"
+      print "#{f.prefix}: #{f.prefix.abv}"
+      print ", built in #{pretty_duration build_time}" if build_time
+      puts
 
     when 'ln', 'link'
       ARGV.kegs.each {|keg| puts "#{keg.link} links created for #{keg}"}