New formula: xmlto

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

Formula/xmlto.rb

@@ -0,0 +1,39 @@
+require 'formula'
+
+class Xmlto <Formula
+  url 'http://fedorahosted.org/releases/x/m/xmlto/xmlto-0.0.23.tar.bz2'
+  md5 '3001d6bb2bbc2c8f6c2301f05120f074'
+  homepage 'http://cyberelk.net/tim/software/xmlto/'
+
+  depends_on 'docbook'
+  depends_on 'gnu-getopt'
+
+  def install
+    docbook = Formula.factory "docbook"
+    getopt = Formula.factory "gnu-getopt"
+
+    unless File.exist? "/private/etc/xml/catalog"
+      opoo "You must to register docbook"
+      puts docbook.caveats
+      exit 99
+    end
+
+    # GNU getopt is keg-only, so point configure to it
+    ENV['GETOPT']=getopt.bin+"getopt"
+
+    ENV.j1
+    system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
+
+    system "make install"
+  end
+
+  def caveats
+    docbook = Formula.factory "docbook"
+    <<-EOS.undent
+      xmlto requires that docbook be installed and registered.
+
+      See:
+        brew info docbook
+    EOS
+  end
+end