#!/usr/bin/env bash
# Run a command in the pinned nixos/nix container, with this worktree mounted at /src.
set -euo pipefail

cd "$(dirname "$0")/.."

image="${NIX_IMAGE:?run through mise, which sets NIX_IMAGE}"
# One store volume per image tag: a new volume starts as a copy of the image's /nix.
store="spindle-nix-$(printf '%s' "${image#*:}" | tr -c 'a-zA-Z0-9' '-')"

docker run --rm \
  -e NIX_CONFIG='experimental-features = nix-command flakes' \
  -v "$store:/nix" \
  -v spindle-nix-cache:/root/.cache \
  -v "$PWD:/src" \
  -w /src \
  "$image" "$@"