class Bazel < Formula
  desc "Google's own build tool"
  homepage "https://bazel.build/"
  url "https://github.com/bazelbuild/bazel/releases/download/0.12.0/bazel-0.12.0-dist.zip"
  sha256 "3b3e7dc76d145046fdc78db7cac9a82bc8939d3b291e53a7ce85315feb827754"

  bottle do
    cellar :any_skip_relocation
    sha256 "4952dbfb9cd67be22cadf1dde843024324dfa2afa0efb0b98564ac6c6bbb72e9" => :high_sierra
    sha256 "49244d626386a5f2a8b3fbacb0e9df30f94ef1ae311a389a6cfdfef256b227bd" => :sierra
    sha256 "bd4d4dafa34c76ddc1ed151aa997b1cb998556fef392d9c7238e31efd3e419ff" => :el_capitan
  end

  depends_on :java => "1.8"
  depends_on :macos => :yosemite

  def install
    ENV["EMBED_LABEL"] = "#{version}-homebrew"
    # Force Bazel ./compile.sh to put its temporary files in the buildpath
    ENV["BAZEL_WRKDIR"] = buildpath/"work"

    (buildpath/"sources").install buildpath.children

    cd "sources" do
      system "./compile.sh"
      system "./output/bazel", "--output_user_root",
             buildpath/"output_user_root", "build", "scripts:bash_completion"

      bin.install "scripts/packages/bazel.sh" => "bazel"
      bin.install "output/bazel" => "bazel-real"
      bin.env_script_all_files(libexec/"bin", Language::Java.java_home_env("1.8"))

      bash_completion.install "bazel-bin/scripts/bazel-complete.bash"
      zsh_completion.install "scripts/zsh_completion/_bazel"

      prefix.install_metafiles
    end
  end

  test do
    touch testpath/"WORKSPACE"

    (testpath/"ProjectRunner.java").write <<~EOS
      public class ProjectRunner {
        public static void main(String args[]) {
          System.out.println("Hi!");
        }
      }
    EOS

    (testpath/"BUILD").write <<~EOS
      java_binary(
        name = "bazel-test",
        srcs = glob(["*.java"]),
        main_class = "ProjectRunner",
      )
    EOS

    system bin/"bazel", "build", "//:bazel-test"
    system "bazel-bin/bazel-test"
  end
end