class Terraform < Formula
  desc "Tool to build, change, and version infrastructure"
  homepage "https://www.terraform.io/"
  url "https://github.com/hashicorp/terraform/archive/v0.11.11.tar.gz"
  sha256 "aa60d15b06ac7a925a722a5ad0070bb1aa580f9ed54cfcc08378f84e25526e01"
  head "https://github.com/hashicorp/terraform.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "f5f3096f7493b4ce63bc1750539201e2931c7730b594f49ca3e852d851a3b571" => :mojave
    sha256 "f450cc1b615d9fb9dcb10cb2e0a6182989e54ff55ddc3e07538a4f0da39e038e" => :high_sierra
    sha256 "6956acc2bf7916b8b085c2b4542e962e5d8cabc307bcc7d690f4b13c8d483aeb" => :sierra
  end

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

  conflicts_with "tfenv", :because => "tfenv symlinks terraform binaries"

  def install
    ENV["GOPATH"] = buildpath
    ENV.prepend_create_path "PATH", buildpath/"bin"

    dir = buildpath/"src/github.com/hashicorp/terraform"
    dir.install buildpath.children - [buildpath/".brew_home"]

    cd dir do
      # v0.6.12 - source contains tests which fail if these environment variables are set locally.
      ENV.delete "AWS_ACCESS_KEY"
      ENV.delete "AWS_SECRET_KEY"

      arch = MacOS.prefer_64_bit? ? "amd64" : "386"
      ENV["XC_OS"] = "darwin"
      ENV["XC_ARCH"] = arch
      system "make", "tools", "test", "bin"

      bin.install "pkg/darwin_#{arch}/terraform"
      prefix.install_metafiles
    end
  end

  test do
    minimal = testpath/"minimal.tf"
    minimal.write <<~EOS
      variable "aws_region" {
          default = "us-west-2"
      }

      variable "aws_amis" {
          default = {
              eu-west-1 = "ami-b1cf19c6"
              us-east-1 = "ami-de7ab6b6"
              us-west-1 = "ami-3f75767a"
              us-west-2 = "ami-21f78e11"
          }
      }

      # Specify the provider and access details
      provider "aws" {
          access_key = "this_is_a_fake_access"
          secret_key = "this_is_a_fake_secret"
          region = "${var.aws_region}"
      }

      resource "aws_instance" "web" {
        instance_type = "m1.small"
        ami = "${lookup(var.aws_amis, var.aws_region)}"
        count = 4
      }
    EOS
    system "#{bin}/terraform", "init"
    system "#{bin}/terraform", "graph"
  end
end