shrub/sh/image

#!/usr/bin/env bash

set -euo pipefail

build=${1:-}

if [[ -z "$build" ]]; then
    build="urbit-image"
fi

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

say "Building $build..."
image="$(nix-build default.nix --no-out-link -A $build)"

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

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