#!/usr/bin/env bash

set -euo pipefail

say() {
  echo "$1" >&2
}

say "Building nix/ops/image..."
nix_out="$(nix-build nix/ops -A image --no-out-link "$@")"

say "Loading $nix_out into Docker..."
nix_name="$(docker load --quiet --input $nix_out)"
nix_name="${nix_name#Loaded image: }"

# Output only the tag on stdout for subsequent pipes/tooling.
echo $nix_name