$ nix build .#localstack-up
warning: Using saved setting for 'extra-trusted-public-keys = comm.cachix.org-1:70RF31rkmCEhQ9HrXA2uXcpqQKGcUK3TxLJdgcUCaA4=' from ~/.local/share/nix/trusted-settings.json.
warning: Using saved setting for 'extra-trusted-substituters = https://comm.cachix.org' from ~/.local/share/nix/trusted-settings.json.
(nix-shell) [10:04:27] jon@jon-desktop /home/jon/comm/comm (jonringer/localstack)
$ cat ./result/bin/localstack-up
#!/nix/store/p7bpdnxqd3i5hwm92mrscf7mvxk66404-bash-5.1-p16/bin/bash
set -o errexit
set -o nounset
set -o pipefail

# Avoid localstack attempt to write in the nix store
XDG_DATA_HOME=${XDG_DATA_HOME:-$HOME/.local/share}
export FILESYSTEM_ROOT=${XDG_DATA_HOME}/localstack/filesystem

# Since docker is installed outside of nix, need to ensure that it was
# installed impurely
if ! command -v docker > /dev/null; then
  echo "Please install docker in order to use localstack" >&2
  exit 1
fi

# The 'localstack status' command will poll foever if you have a newer
# docker cli, so instead use docker ps + grep to determine running container
if ! docker ps | grep localstack &> /dev/null; then
  echo "Starting localstack..." >&2
  /nix/store/6qjayc18ircvp764ccdapzqnjji8khfy-python3.10-localstack-1.0.4/bin/localstack start \
    --detached \
    --docker \
    --no-banner > /dev/null
else
  echo "localstack is already running, skipping localstack initialization"
fi

# Explicitly exit this script so the parent shell can determine
# when it's safe to return control of terminal to user
exit 0