cflow: modernise & add test

Modernises the cflow formula with SSL/TLS links, SHA256, double quotes
everywhere, etc. Also added a test, which I completely and utterly
stole from the GNU manpage for cflow.

Closes #37565.

Signed-off-by: Brett Koonce <koonce@gmail.com>

1 files changed, 46 insertions, 9 deletions

diff --git a/Library/Formula/cflow.rb b/Library/Formula/cflow.rb
index 1a04530b3..d2642acde 100644
--- a/Library/Formula/cflow.rb
+++ b/Library/Formula/cflow.rb
@@ -1,15 +1,52 @@
-require 'formula'
-
 class Cflow < Formula
-  homepage 'http://www.gnu.org/software/cflow/'
-  url 'http://ftpmirror.gnu.org/cflow/cflow-1.4.tar.bz2'
-  mirror 'http://ftp.gnu.org/gnu/cflow/cflow-1.4.tar.bz2'
-  sha1 'b8c3674e47112d5a81c34719fef343430be77f88'
+  homepage "https://www.gnu.org/software/cflow/"
+  url "http://ftpmirror.gnu.org/cflow/cflow-1.4.tar.bz2"
+  mirror "https://ftp.gnu.org/gnu/cflow/cflow-1.4.tar.bz2"
+  sha256 "037e39d6048ea91c68a5f3a561e10f22fd085d1f7641643e19c831a94ec26bca"
 
   def install
     system "./configure", "--disable-debug", "--disable-dependency-tracking",
-                          "--prefix=#{prefix}",
-                          "--infodir=#{info}"
-    system "make install"
+                          "--prefix=#{prefix}", "--infodir=#{info}"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"whoami.c").write <<-EOS.undent
+     #include <pwd.h>
+     #include <sys/types.h>
+     #include <stdio.h>
+     #include <stdlib.h>
+
+     int
+     who_am_i (void)
+     {
+       struct passwd *pw;
+       char *user = NULL;
+
+       pw = getpwuid (geteuid ());
+       if (pw)
+         user = pw->pw_name;
+       else if ((user = getenv ("USER")) == NULL)
+         {
+           fprintf (stderr, "I don't know!\n");
+           return 1;
+         }
+       printf ("%s\n", user);
+       return 0;
+     }
+
+     int
+     main (int argc, char **argv)
+     {
+       if (argc > 1)
+         {
+           fprintf (stderr, "usage: whoami\n");
+           return 1;
+         }
+       return who_am_i ();
+     }
+    EOS
+
+    assert_match /getpwuid()/, shell_output("#{bin}/cflow --main who_am_i #{testpath}/whoami.c")
   end
 end