augeas 1.2.0

Closes Homebrew/homebrew#28412.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/augeas.rb

@@ -2,14 +2,31 @@ require 'formula'
 
 class Augeas < Formula
   homepage 'http://augeas.net'
-  url 'http://download.augeas.net/augeas-1.0.0.tar.gz'
-  sha1 '5d0bc5738cc77ad4731f9406fb8dceb08826bba9'
+  url 'http://download.augeas.net/augeas-1.2.0.tar.gz'
+  sha1 'ab63548ae5462d7b3dc90e74311b8e566ba22485'
+
+  head do
+    url 'https://github.com/hercules-team/augeas.git'
+
+    depends_on :autoconf
+    depends_on :automake
+    depends_on :libtool
+    depends_on 'bison' => :build
+  end
 
   depends_on 'pkg-config' => :build
   depends_on 'libxml2'
   depends_on 'readline'
 
   def install
+    if build.head?
+      # The bootstrap script run by autogen needs to check the state of the
+      # gnulib submodule.
+      ln_s cached_download + '.git', '.git'
+      ln_s cached_download + '.gnulib/.git', '.gnulib/.git'
+
+      system './autogen.sh'
+    end
     system "./configure", "--disable-debug", "--disable-dependency-tracking",
                           "--prefix=#{prefix}"