emacs: use checksummed patches

Formula/emacs.rb

@@ -31,6 +31,29 @@ class Emacs < Formula
       depends_on :autoconf
       depends_on :automake
     end
+
+    # Fix default-directory on Cocoa and Mavericks.
+    # Fixed upstream in r114730 and r114882.
+    patch :p0, :DATA
+
+    # Make native fullscreen mode optional, mostly from upstream r111679
+    patch do
+      url "https://gist.github.com/scotchi/7209145/raw/a571acda1c85e13ed8fe8ab7429dcb6cab52344f/ns-use-native-fullscreen-and-toggle-frame-fullscreen.patch"
+      sha1 "cb4cc4940efa1a43a5d36ec7b989b90834b7442b"
+    end
+
+    # Fix memory leaks in NS version from upstream r114945
+    patch do
+      url "https://gist.github.com/anonymous/8553178/raw/c0ddb67b6e92da35a815d3465c633e036df1a105/emacs.memory.leak.aka.distnoted.patch.diff"
+      sha1 "173ce253e0d8920e0aa7b1464d5635f6902c98e7"
+    end
+
+    # "--japanese" option:
+    # to apply a patch from MacEmacsJP for Japanese input methods
+    patch :p0 do
+      url "http://sourceforge.jp/projects/macemacsjp/svn/view/inline_patch/trunk/emacs-inline.patch?view=co&revision=583&root=macemacsjp&pathrev=583"
+      sha1 "61a6f41f3ddc9ecc3d7f57379b3dc195d7b9b5e2"
+    end if build.include? "cocoa" and build.include? "japanese"
   end
 
   depends_on 'pkg-config' => :build
@@ -44,23 +67,6 @@ class Emacs < Formula
 
   def patches
     return if build.head?
-
-    p = {
-      # Fix default-directory on Cocoa and Mavericks.
-      # Fixed upstream in r114730 and r114882.
-      :p0 => [ DATA ],
-      :p1 => [
-        # Make native fullscreen mode optional, mostly from upstream r111679
-        'https://gist.github.com/scotchi/7209145/raw/a571acda1c85e13ed8fe8ab7429dcb6cab52344f/ns-use-native-fullscreen-and-toggle-frame-fullscreen.patch',
-        # Fix memory leaks in NS version from upstream r114945
-        'https://gist.github.com/anonymous/8553178/raw/c0ddb67b6e92da35a815d3465c633e036df1a105/emacs.memory.leak.aka.distnoted.patch.diff',
-      ]
-    }
-    # "--japanese" option:
-    # to apply a patch from MacEmacsJP for Japanese input methods
-    if build.include? "cocoa" and build.include? "japanese"
-      p[:p0].push("http://sourceforge.jp/projects/macemacsjp/svn/view/inline_patch/trunk/emacs-inline.patch?view=co&revision=583&root=macemacsjp&pathrev=583")
-    end
     p
   end