class Cflow < Formula
  desc "Generate call graphs from C code"
  homepage "https://www.gnu.org/software/cflow/"
  url "https://ftp.gnu.org/gnu/cflow/cflow-1.5.tar.bz2"
  mirror "https://ftpmirror.gnu.org/cflow/cflow-1.5.tar.bz2"
  sha256 "6fe40a106a9ffd6a5489938b939d4301c04fa28a09596294b4f787abca1c037b"

  bottle do
    cellar :any_skip_relocation
    sha256 "d97871418bd311cd914ac0b7dbcf900d599ea706c8bb91d20cf9c63406c3d066" => :high_sierra
    sha256 "40efaa5c5298d6aa3ca2bce884ede21d21cb59df94eee0bc121a588dcb58257b" => :sierra
    sha256 "4bde642d869a9ea7347ad91bdb87a0de3c93f3766e8b74bb6e74a763278724c3" => :el_capitan
    sha256 "ae1fcbcfbf28417dfcc4836f32446ece545e9fceee61f34617d6364a2dd106e0" => :yosemite
    sha256 "b50f226680f8b0e3acaea2e09781cd6d7b03bdf1191fe338658d9aacef448a9f" => :mavericks
  end

  def install
    system "./configure", "--prefix=#{prefix}",
                          "--infodir=#{info}",
                          "--disable-debug",
                          "--disable-dependency-tracking",
                          "--with-lispdir=#{elisp}"
    system "make", "install"
  end

  test do
    (testpath/"whoami.c").write <<~EOS
      #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