class Libmagic < Formula
  desc "Implementation of the file(1) command"
  homepage "https://www.darwinsys.com/file/"
  url "ftp://ftp.astron.com/pub/file/file-5.36.tar.gz"
  sha256 "fb608290c0fd2405a8f63e5717abf6d03e22e183fb21884413d1edd918184379"

  bottle do
    sha256 "2f9cd29505ced7c842c5c673db528c68237acc69f552fb1ebe7b903f0e2597be" => :mojave
    sha256 "b63065cb2c3501a8b352d1587804a0c7af97e2fac27fd114987e7571dfc1c3ab" => :high_sierra
    sha256 "8187a0d50ab22d037e598c08d2e2793a84c9ce994748fa79ad8f505b889528c6" => :sierra
  end

  def install
    system "./configure", "--disable-dependency-tracking",
                          "--disable-silent-rules",
                          "--prefix=#{prefix}",
                          "--enable-fsect-man5",
                          "--enable-static"
    system "make", "install"
    (share/"misc/magic").install Dir["magic/Magdir/*"]

    # Don't dupe this system utility
    rm bin/"file"
    rm man1/"file.1"
  end

  test do
    (testpath/"test.c").write <<~EOS
      #include <assert.h>
      #include <stdio.h>

      #include <magic.h>

      int main(int argc, char **argv) {
          magic_t cookie = magic_open(MAGIC_MIME_TYPE);
          assert(cookie != NULL);
          assert(magic_load(cookie, NULL) == 0);
          // Prints the MIME type of the file referenced by the first argument.
          puts(magic_file(cookie, argv[1]));
      }
    EOS
    system ENV.cc, "-I#{include}", "-L#{lib}", "-lmagic", "test.c", "-o", "test"
    cp test_fixtures("test.png"), "test.png"
    assert_equal "image/png", shell_output("./test test.png").chomp
  end
end