class Vala < Formula
  desc "Compiler for the GObject type system"
  homepage "https://live.gnome.org/Vala"
  url "https://download.gnome.org/sources/vala/0.36/vala-0.36.3.tar.xz"
  sha256 "ac8a4ecd01f62d0c5f62ba50b7290d8c5a1edb308eec772a65b8e79be68f061c"

  bottle do
    sha256 "9d8bbc661d48d5bb15bdf61a440e18b5e0c12eb3b1569e2f8851d0dfb33887dc" => :sierra
    sha256 "b711d4bbf89232f5622b8ff6036494e7183086d39b9f69463db248636b74b966" => :el_capitan
    sha256 "0bc356e30226a96919bda4e2bbfe007d84dacb8e8cbafe8e61559a2417f13a98" => :yosemite
  end

  depends_on "pkg-config" => :run
  depends_on "gettext"
  depends_on "glib"

  def install
    system "./configure", "--disable-dependency-tracking",
                          "--disable-silent-rules",
                          "--prefix=#{prefix}"
    system "make" # Fails to compile as a single step
    system "make", "install"
  end

  test do
    test_string = "Hello Homebrew\n"
    path = testpath/"hello.vala"
    path.write <<-EOS
      void main () {
        print ("#{test_string}");
      }
    EOS
    valac_args = [
      # Build with debugging symbols.
      "-g",
      # Use Homebrew's default C compiler.
      "--cc=#{ENV.cc}",
      # Save generated C source code.
      "--save-temps",
      # Vala source code path.
      path.to_s,
    ]
    system "#{bin}/valac", *valac_args
    assert File.exist?(testpath/"hello.c")

    assert_equal test_string, shell_output("#{testpath}/hello")
  end
end