class Vala < Formula
  desc "Compiler for the GObject type system"
  homepage "https://live.gnome.org/Vala"
  url "https://download.gnome.org/sources/vala/0.28/vala-0.28.0.tar.xz"
  sha256 "0d9e3bd3f82145664875f7c29b2f544ba92d2814f75412948f774c0727fc977f"

  bottle do
    sha256 "637fba462ccb76d523bf960b790b70c906e8e90b5ef14ddb10fb2b3a49bef5b9" => :yosemite
    sha256 "57ece7782e2d1c997de1849923e9c64f7c4eaead80251bcddd37bed836c5b18b" => :mavericks
    sha256 "3fe949f7ad4a1121f2ea41cc0e45f37bd127d967354c43c94d9b3178a1594997" => :mountain_lion
  end

  devel do
    url "https://download.gnome.org/sources/vala/0.29/vala-0.29.2.tar.xz"
    sha256 "e4ef92b3b55a4dcaeb13a2cf673924234fb6330033b1b4906e125735fa41d1ba"
  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}"]
    system "#{bin}/valac", *valac_args
    assert File.exist?(testpath/"hello.c")

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