class Linkerd < Formula
  desc "Command-line utility to interact with linkerd"
  homepage "https://linkerd.io"

  url "https://github.com/linkerd/linkerd2.git",
    :tag      => "stable-2.4.0",
    :revision => "a63c9cedc91e32ada52ad59470c4723ea717bfdd"

  bottle do
    cellar :any_skip_relocation
    sha256 "51c29cc8656eb38f1a943b001666d9e5d17ddf3212c11483fd58081eb3924c97" => :mojave
    sha256 "c92327dd21ad2a0c99aa571faf3d8b002f3316e4bc8c8c75ffb852d366b5480b" => :high_sierra
    sha256 "d45d5f4e7e892d6ead8bcefebaa444e4fd45920941516a5304bcce96cea1a1ee" => :sierra
  end

  depends_on "go" => :build

  def install
    ENV["GOPATH"] = buildpath
    ENV["CI_FORCE_CLEAN"] = "1"

    srcpath = buildpath/"src/github.com/linkerd/linkerd2"
    srcpath.install buildpath.children - [buildpath/".brew_home"]

    cd srcpath do
      system "bin/build-cli-bin"
      bin.install "target/cli/darwin/linkerd"

      # Install bash completion
      output = Utils.popen_read("#{bin}/linkerd completion bash")
      (bash_completion/"linkerd").write output

      # Install zsh completion
      output = Utils.popen_read("#{bin}/linkerd completion zsh")
      (zsh_completion/"linkerd").write output

      prefix.install_metafiles
    end
  end

  test do
    run_output = shell_output("#{bin}/linkerd 2>&1")
    assert_match "linkerd manages the Linkerd service mesh.", run_output

    version_output = shell_output("#{bin}/linkerd version --client 2>&1")
    assert_match "Client version: ", version_output
    stable_resource = stable.instance_variable_get(:@resource)
    assert_match stable_resource.instance_variable_get(:@specs)[:tag], version_output if build.stable?

    system "#{bin}/linkerd", "install", "--ignore-cluster"
  end
end