class Packer < Formula
  desc "Tool for creating identical machine images for multiple platforms"
  homepage "https://packer.io"
  url "https://github.com/hashicorp/packer.git",
      :tag      => "v1.3.5",
      :revision => "542cb1d872b4fbba57f34ebb5913a266017a38df"
  head "https://github.com/hashicorp/packer.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "d89789a2b9eb05c72f95c160c218a1b34281de16940cecb906c0b87ff6c04f30" => :mojave
    sha256 "4ed4109eb62477592281fb36a9ab543265fdb70916095140f9c488f06550ad3c" => :high_sierra
    sha256 "8168a91a5748a5f673f714a398d648a6197c45ee1565a9718439c0a4ae894e31" => :sierra
  end

  depends_on "coreutils" => :build
  depends_on "go" => :build
  depends_on "govendor" => :build
  depends_on "gox" => :build

  def install
    ENV["XC_OS"] = "darwin"
    ENV["XC_ARCH"] = "amd64"
    ENV["GOPATH"] = buildpath

    packerpath = buildpath/"src/github.com/hashicorp/packer"
    packerpath.install Dir["{*,.git}"]

    cd packerpath do
      # Avoid running `go get`
      inreplace "Makefile" do |s|
        s.gsub! "go get github.com/kardianos/govendor", ""
        s.gsub! "go get github.com/mitchellh/gox", ""
        s.gsub! "go get -u github.com/mna/pigeon", ""
        s.gsub! "go get golang.org/x/tools/cmd/goimports", ""
        s.gsub! "go get golang.org/x/tools/cmd/stringer", ""
      end

      (buildpath/"bin").mkpath
      if build.head?
        system "make", "bin"
      else
        system "make", "releasebin"
      end
      bin.install buildpath/"bin/packer"
      zsh_completion.install "contrib/zsh-completion/_packer"
      prefix.install_metafiles
    end
  end

  test do
    minimal = testpath/"minimal.json"
    minimal.write <<~EOS
      {
        "builders": [{
          "type": "amazon-ebs",
          "region": "us-east-1",
          "source_ami": "ami-59a4a230",
          "instance_type": "m3.medium",
          "ssh_username": "ubuntu",
          "ami_name": "homebrew packer test  {{timestamp}}"
        }],
        "provisioners": [{
          "type": "shell",
          "inline": [
            "sleep 30",
            "sudo apt-get update"
          ]
        }]
      }
    EOS
    system "#{bin}/packer", "validate", "-syntax-only", minimal
  end
end