require 'formula'

class Glib < Formula
  homepage 'http://developer.gnome.org/glib/'
  url 'http://ftp.gnome.org/pub/gnome/sources/glib/2.34/glib-2.34.3.tar.xz'
  sha256 '855fcbf87cb93065b488358e351774d8a39177281023bae58c286f41612658a7'

  option :universal
  option 'test', 'Build a debug build and run tests. NOTE: Not all tests succeed yet'

  depends_on 'pkg-config' => :build
  depends_on 'xz' => :build
  depends_on 'gettext'
  depends_on 'libffi'

  fails_with :llvm do
    build 2334
    cause "Undefined symbol errors while linking"
  end

  def patches
    # https://bugzilla.gnome.org/show_bug.cgi?id=673135 Resolved as wontfix.
    p = { :p1 => %W[
      https://raw.github.com/gist/3924879/f86903e0aea1458448507305d01b06a7d878c041/glib-configurable-paths.patch
    ]}
    p[:p0] = %W[
        https://trac.macports.org/export/95596/trunk/dports/devel/glib2/files/patch-configure.diff
    ] if build.universal?
    p
  end

  def install
    ENV.universal_binary if build.universal?

    # -w is said to causes gcc to emit spurious errors for this package
    ENV.enable_warnings if ENV.compiler == :gcc

    # Disable dtrace; see https://trac.macports.org/ticket/30413
    args = %W[
      --disable-maintainer-mode
      --disable-dependency-tracking
      --disable-dtrace
      --prefix=#{prefix}
      --localstatedir=#{var}
    ]

    system "./configure", *args

    if build.universal?
      system "curl 'https://trac.macports.org/export/95596/trunk/dports/devel/glib2/files/config.h.ed' | ed - config.h"
    end

    system "make"
    # the spawn-multithreaded tests require more open files
    system "ulimit -n 1024; make check" if build.include? 'test'
    system "make install"

    # This sucks; gettext is Keg only to prevent conflicts with the wider
    # system, but pkg-config or glib is not smart enough to have determined
    # that libintl.dylib isn't in the DYLIB_PATH so we have to add it
    # manually.
    gettext = Formula.factory('gettext')
    inreplace lib+'pkgconfig/glib-2.0.pc' do |s|
      s.gsub! 'Libs: -L${libdir} -lglib-2.0 -lintl',
              "Libs: -L${libdir} -lglib-2.0 -L#{gettext.lib} -lintl"

      s.gsub! 'Cflags: -I${includedir}/glib-2.0 -I${libdir}/glib-2.0/include',
              "Cflags: -I${includedir}/glib-2.0 -I${libdir}/glib-2.0/include -I#{gettext.include}"
    end

    (share+'gtk-doc').rmtree
  end

  def test
    mktemp do
      (Pathname.pwd/'test.c').write <<-EOS.undent
        #include <string.h>
        #include <glib.h>

        int main(void)
        {
            gchar *result_1, *result_2;
            char *str = "string";

            result_1 = g_convert(str, strlen(str), "ASCII", "UTF-8", NULL, NULL, NULL);
            result_2 = g_convert(result_1, strlen(result_1), "UTF-8", "ASCII", NULL, NULL, NULL);

            return (strcmp(str, result_2) == 0) ? 0 : 1;
        }
        EOS
      flags = *`pkg-config --cflags --libs glib-2.0`.split
      flags += ENV.cflags.split
      system ENV.cc, "-o", "test", "test.c", *flags
      system "./test"
    end
  end
end