google-js-test: use a requirement for Snow Leopard

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

1 files changed, 14 insertions, 5 deletions

diff --git a/Library/Formula/google-js-test.rb b/Library/Formula/google-js-test.rb
index dae5fb691..af44f9b0c 100644
--- a/Library/Formula/google-js-test.rb
+++ b/Library/Formula/google-js-test.rb
@@ -1,10 +1,21 @@
 require 'formula'
 
+class NeedsSnowLeopard < Requirement
+  def message
+    "Google JS Test requires Mac OS X 10.6 (Snow Leopard) or newer."
+  end
+
+  def satisfied?
+    MacOS.snow_leopard?
+  end
+end
+
 class GoogleJsTest < Formula
-  url 'http://google-js-test.googlecode.com/files/gjstest-1.0.7.tar.bz2'
   homepage 'http://code.google.com/p/google-js-test/'
+  url 'http://google-js-test.googlecode.com/files/gjstest-1.0.7.tar.bz2'
   sha1 '8580cfe9c3ed2eca6e3c076bfc321048a6e4dd64'
 
+  depends_on NeedsSnowLeopard.new
   depends_on 'gflags'
   depends_on 'glog'
   depends_on 'protobuf'
@@ -12,9 +23,7 @@ class GoogleJsTest < Formula
   depends_on 'v8'
 
   def install
-    raise 'gjstest requires Snow Leopard or above.' if MacOS.leopard?
-
-    system "make PREFIX=#{prefix}"
-    system "make PREFIX=#{prefix} install"
+    system "make", "PREFIX=#{prefix}"
+    system "make", "PREFIX=#{prefix}", "install"
   end
 end