class Cling < Formula
  desc "The cling C++ interpreter"
  homepage "https://root.cern.ch/cling"
  url "http://root.cern.ch/git/cling.git",
      :tag => "v0.5",
      :revision => "0f1d6d24d4417fc02b73589c8b1d813e92de1c3f"

  bottle do
    sha256 "db1bf4e905c6b787b63b50c03a43028b71a00110b5008b48ee01a24400efbdb9" => :high_sierra
    sha256 "83fd0ba864ef3261b3ab6e58647d44036029298dd55408ac0527c4953259e024" => :sierra
    sha256 "4f327b0cab15cfc5f77c1ae77651861af5855c1b324d55175246f24d9d2743e5" => :el_capitan
  end

  depends_on "cmake" => :build

  resource "clang" do
    url "http://root.cern.ch/git/clang.git",
        :tag => "cling-patches-r302975",
        :revision => "1f8b137c7eb06ed8e321649ef7e3f3e7a96f361c"
  end

  resource "llvm" do
    url "http://root.cern.ch/git/llvm.git",
        :tag => "cling-patches-r302975",
        :revision => "2a34248cb945d63ded5ee55128e68efd7e5b87c8"
  end

  def install
    (buildpath/"src").install resource("llvm")
    (buildpath/"src/tools/cling").install buildpath.children - [buildpath/"src"]
    (buildpath/"src/tools/clang").install resource("clang")
    mkdir "build" do
      system "cmake", *std_cmake_args, "../src"
      system "make", "install"
    end
    prefix.install_metafiles buildpath/"src/tools/cling"
  end

  test do
    test = <<~EOS
      '#include <stdio.h>' 'printf("Hello!")'
    EOS
    assert_equal "Hello!(int) 6", shell_output("#{bin}/cling #{test}").chomp
  end
end