Add yaws formula

Library/Formula/yaws.rb

@@ -0,0 +1,30 @@
+require 'formula'
+
+class Yaws < Formula
+  homepage "http://yaws.hyber.org"
+
+  version "1.87"
+  md5     "ee04c67b1a3869eaef380153d24504c0"
+
+  url "http://yaws.hyber.org/download/yaws-#{version}.tar.gz"
+
+ depends_on 'erlang'
+
+ def options
+   [["--with-yapp", "Build and install yaws applications"]]
+ end
+
+  def install
+    system "cd yaws && ./configure --prefix=#{prefix}"
+    system "cd yaws && make install"
+
+    if ARGV.include?('--with-yapp')
+      system "cd yaws/applications/yapp && make && make install"
+    end
+  end
+
+    def caveats; <<-EOS
+  Usually you want to build yapp (yaws applications) as well. To do so, use the --with-yapp command line flag.
+      EOS
+    end
+end