class Skopeo < Formula
  desc "Work with remote images registries"
  homepage "https://github.com/containers/skopeo"
  url "https://github.com/containers/skopeo/archive/v0.1.39.tar.gz"
  sha256 "e9d70f7f7b891675a816f06a22df0490285ad20eefbd91f5da69ca12f56c29f2"

  bottle do
    cellar :any
    sha256 "840eab0e0f58502e5162629c880cc293952fe8feb9fdac09309430153dff5b13" => :mojave
    sha256 "3c11f82391e9aa4ef6e6becb8005a002323dde8668efb5bc7f3e52892de7838e" => :high_sierra
    sha256 "b776102170a389e39002c0dceac6b38e802b45bc513add1cacbacd9182742378" => :sierra
  end

  depends_on "go" => :build
  depends_on "gpgme"

  def install
    ENV["GOPATH"] = buildpath
    ENV["CGO_ENABLED"] = "1"
    ENV.append "CGO_FLAGS", ENV.cppflags
    ENV.append "CGO_FLAGS", Utils.popen_read("#{Formula["gpgme"].bin}/gpgme-config --cflags")

    (buildpath/"src/github.com/containers/skopeo").install buildpath.children
    cd buildpath/"src/github.com/containers/skopeo" do
      buildtags = [
        "containers_image_ostree_stub",
        Utils.popen_read("hack/btrfs_tag.sh").chomp,
        Utils.popen_read("hack/btrfs_installed_tag.sh").chomp,
        Utils.popen_read("hack/libdm_tag.sh").chomp,
        Utils.popen_read("hack/ostree_tag.sh").chomp,
      ].uniq.join(" ")

      ldflags = [
        "-X main.gitCommit=",
        "-X github.com/containers/skopeo/vendor/github.com/containers/image/docker.systemRegistriesDirPath=#{etc/"containers/registries.d"}",
        "-X github.com/containers/skopeo/vendor/github.com/containers/image/internal/tmpdir.unixTempDirForBigFiles=#{ENV["TEMPDIR"]}",
        "-X github.com/containers/skopeo/vendor/github.com/containers/image/signature.systemDefaultPolicyPath=#{etc/"containers/policy.json"}",
        "-X github.com/containers/skopeo/vendor/github.com/containers/image/sysregistries.systemRegistriesConfPath=#{etc/"containers/registries.conf"}",
      ].join(" ")

      system "go", "build", "-v", "-x", "-tags", buildtags, "-ldflags", ldflags, "-o", bin/"skopeo", "./cmd/skopeo"

      (etc/"containers").install "default-policy.json" => "policy.json"
      (etc/"containers/registries.d").install "default.yaml"

      prefix.install_metafiles
    end
  end

  test do
    cmd = "#{bin}/skopeo --override-os linux inspect docker://busybox"
    output = shell_output(cmd)
    assert_match "docker.io/library/busybox", output
  end
end