cweb 3.64ad (new formula)

Formula/cweb.rb

@@ -0,0 +1,44 @@
+require "formula"
+
+class Cweb < Formula
+  homepage "http://www-cs-faculty.stanford.edu/~uno/cweb.html"
+  url "ftp://ftp.cs.stanford.edu/pub/cweb/cweb-3.64ad.tar.gz"
+  sha1 "a9828b66b525d7cf91c57b3c4891168caa4af10a"
+
+  def install
+    ENV.deparallelize
+
+    macrosdir = (share/"texmf/tex/generic")
+    emacsdir = (share/"emacs/site-lisp")
+    cwebinputs = (lib/"cweb")
+
+    # make install doesn't use `mkdir -p` so this is needed
+    [bin, man1, macrosdir, emacsdir, cwebinputs].each do |path|
+        path.mkpath
+    end
+
+    system "make", "install",
+      "DESTDIR=#{bin}/",
+      "MANDIR=#{man1}",
+      "MANEXT=1",
+      "MACROSDIR=#{macrosdir}",
+      "EMACSDIR=#{emacsdir}",
+      "CWEBINPUTS=#{cwebinputs}"
+  end
+
+  test do
+    (testpath/"test.w").write <<-EOS.undent
+      @* Hello World
+      This is a minimal program written in CWEB.
+
+      @c
+      #include <stdio.h>
+      void main() {
+          printf("Hello world!");
+      }
+    EOS
+    system "ctangle", "test.w"
+    system ENV.cc, "test.c", "-o", "hello"
+    assert_equal "Hello world!", `./hello`
+  end
+end