Add ARGV.git?

Library/Homebrew/build.rb

@@ -115,7 +115,7 @@ class Build
     end
 
     formula.brew do
-      if ARGV.flag? '--git'
+      if ARGV.git?
         system "git", "init"
         system "git", "add", "-A"
       end
@@ -124,7 +124,7 @@ class Build
         puts "Type `exit' to return and finalize the installation"
         puts "Install to this prefix: #{formula.prefix}"
 
-        if ARGV.flag? '--git'
+        if ARGV.git?
           puts "This directory is now a git repo. Make your changes and then use:"
           puts "  git diff | pbcopy"
           puts "to copy the diff to the clipboard."

Library/Homebrew/cmd/install.rb

@@ -125,7 +125,7 @@ module Homebrew
     fi.build_from_source   = ARGV.build_from_source?
     fi.force_bottle        = ARGV.force_bottle?
     fi.interactive         = ARGV.interactive?
-    fi.interactive       &&= :git if ARGV.flag? "--git"
+    fi.interactive       &&= :git if ARGV.git?
     fi.verbose             = ARGV.verbose?
     fi.verbose           &&= :quieter if ARGV.quieter?
     fi.debug               = ARGV.debug?

Library/Homebrew/cmd/unpack.rb

@@ -36,7 +36,7 @@ module Homebrew
       f.brew { cp_r getwd, stage_dir }
       ENV['VERBOSE'] = nil
 
-      if ARGV.flag? "--git"
+      if ARGV.git?
         ohai "Setting up git repository"
         cd stage_dir
         system "git", "init", "-q"

Library/Homebrew/extend/ARGV.rb

@@ -86,6 +86,10 @@ module HomebrewArgvExtension
     include?('--dry-run') || switch?('n')
   end
 
+  def git?
+    flag? "--git"
+  end
+
   def homebrew_developer?
     include? '--homebrew-developer' or !ENV['HOMEBREW_DEVELOPER'].nil?
   end