class Terraform < Formula
  desc "Tool to build, change, and version infrastructure"
  homepage "https://www.terraform.io/"
  url "https://github.com/hashicorp/terraform/archive/v0.12.1.tar.gz"
  sha256 "c8db1cdf8d4e5c3601718387f34aad9b27f38b4d10a50650565cd55576b11e60"
  head "https://github.com/hashicorp/terraform.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "1095c13ce7081c29104e908f02f2fc6ba44906c9787611b56e92f75d1992687b" => :mojave
    sha256 "cf2ba5d49da8de8a2aee05da143d748a4edd6112ddc5e52855c8a183c666e742" => :high_sierra
    sha256 "262a8cee1e5cf5d3bfcc1b4934d9cdd20f118623f958be73b6a98f2d38ecb9f8" => :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"

      ENV["XC_OS"] = "darwin"
      ENV["XC_ARCH"] = "amd64"
      system "make", "tools", "test", "bin"

      bin.install "pkg/darwin_amd64/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