class Terraform < Formula
  desc "Tool to build, change, and version infrastructure"
  homepage "https://www.terraform.io/"
  url "https://github.com/hashicorp/terraform/archive/v0.12.19.tar.gz"
  sha256 "bcc7a2d074a0d22cfa8daf0a604167b61b439d2769840909a47556c5644bda4d"
  head "https://github.com/hashicorp/terraform.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "7f8a1371bc9786efd3aec4401c37a45b5f19dced3c62150cc97cf5e93a24817f" => :catalina
    sha256 "87fb6c29636c1a19eeac2ce5b4b4cde1018da45323915a4a441006eb81d5f435" => :mojave
    sha256 "bf6ebda1beb2dc91e5ec6e607456ce1c0789dfe102d25e879856dfd5938eb3dd" => :high_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", "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           = var.aws_amis[var.aws_region]
        count         = 4
      }
    EOS
    system "#{bin}/terraform", "init"
    system "#{bin}/terraform", "graph"
  end
end