GNU which 2.20

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

Formula/gnu-which.rb

@@ -0,0 +1,19 @@
+require 'formula'
+
+class GnuWhich < Formula
+  url 'http://ftpmirror.gnu.org/which/which-2.20.tar.gz'
+  homepage 'http://carlo17.home.xs4all.nl/which/'
+  md5 '95be0501a466e515422cde4af46b2744'
+
+  def options
+    [['--default-names', "Do NOT prepend 'g' to the binary; will override system utils."]]
+  end
+
+  def install
+    args = ["--prefix=#{prefix}", "--disable-dependency-tracking"]
+    args << "--program-prefix=g" unless ARGV.include? '--default-names'
+
+    system "./configure", *args
+    system "make install"
+  end
+end