git-extras 1.7.0 (includes bash completions)

Closes Homebrew/homebrew#13436.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>

Formula/git-extras.rb

@@ -2,12 +2,22 @@ require 'formula'
 
 class GitExtras < Formula
   homepage 'https://github.com/visionmedia/git-extras'
-  url 'https://github.com/visionmedia/git-extras/tarball/1.5.0'
-  sha1 '60e0ad00b046d76b3c111d9cc3d02aa4191e450a'
+  url 'https://github.com/visionmedia/git-extras/tarball/1.7.0'
+  sha1 '939a9a736b5ecd3dae98eb16104f4e109bdf2f70'
 
   head 'https://github.com/visionmedia/git-extras.git', :branch => 'master'
 
+  # Don't take +x off these files
+  skip_clean 'bin'
+
   def install
+    inreplace 'Makefile', %r|\$\(DESTDIR\)(?=/etc/bash_completion\.d)|, '$(DESTDIR)$(PREFIX)'
     system "make", "PREFIX=#{prefix}", "install"
   end
+
+  def caveats; <<-EOS.undent
+    Bash completion has been installed to:
+      #{etc}/bash_completion.d
+    EOS
+  end
 end