#!/usr/bin/env bash
# Run a command inside the DarkRoom macOS link-check container.
#
#   ./docker/macos/build.sh cargo zigbuild --target aarch64-apple-darwin -p dr-inference-engine --all-targets
#   ./docker/macos/build.sh                    # interactive shell
#
# Builds the image on first use; `--rebuild` after editing the Dockerfile.
set -euo pipefail

IMAGE="darkroom-macos:latest"
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO="$(cd "${HERE}/../.." && pwd)"

if command -v podman >/dev/null 2>&1; then
    ENGINE=podman
elif command -v docker >/dev/null 2>&1; then
    ENGINE=docker
else
    echo "error: neither podman nor docker found" >&2
    exit 1
fi

if [[ "${1:-}" == "--rebuild" ]]; then
    shift
    "${ENGINE}" build -t "${IMAGE}" "${HERE}"
elif ! "${ENGINE}" image inspect "${IMAGE}" >/dev/null 2>&1; then
    echo "==> building ${IMAGE} (first run; a few minutes)"
    "${ENGINE}" build -t "${IMAGE}" "${HERE}"
fi

# Registry, target and zig's own cache persist across runs.
CACHE="${XDG_CACHE_HOME:-${HOME}/.cache}/darkroom-macos"
mkdir -p "${CACHE}/registry" "${CACHE}/target" "${CACHE}/home"

ARGS=(
    --rm
    -v "${REPO}:/work:z"
    -v "${CACHE}/registry:/opt/cargo/registry:z"
    -v "${CACHE}/target:/work/target-macos:z"
    -v "${CACHE}/home:/tmp/home:z"
    -e HOME=/tmp/home
    -e CARGO_TARGET_DIR=/work/target-macos
    -w /work
)

# Capped for the same reason as the Windows image: a cross build otherwise
# takes every thread on the host.
JOBS="${DARKROOM_BUILD_JOBS:-8}"
if [[ "${JOBS}" != "0" ]]; then
    ARGS+=(--cpus "${JOBS}" -e "CARGO_BUILD_JOBS=${JOBS}")
fi

if [[ "${ENGINE}" == "docker" ]]; then
    ARGS+=(--user "$(id -u):$(id -g)")
fi

if [[ $# -eq 0 ]]; then
    ARGS+=(-it)
    set -- /bin/bash
fi

exec "${ENGINE}" run "${ARGS[@]}" "${IMAGE}" "$@"