#!/usr/bin/env bash
# Build for the deepseek-v4-flash-eugr overlay (eugr/spark-vllm-b12x + baked
# instanttensor-hybrid-draft-loader mod). No versions.env — this is a FROM
# overlay on a prebuilt public image, like deepseek-v4-flash-dspark.
set -euo pipefail
cd "$(dirname "$0")"
TAG="${TAG:-eugr/spark-vllm-b12x:sm121}"
echo "=== Building ${TAG} ==="
# Persistent buildkit cache (per node, shared across image dirs): the
# version-independent stages (apt, torch, CUDA base) are reused across
# rebuilds — only the pinned source stages (vllm/b12x/…) re-download and
# re-compile. Override the dir with SM121_BUILDKIT_CACHE if desired.
CACHE_DIR="${SM121_BUILDKIT_CACHE:-$HOME/.cache/sm121-buildkit}"
mkdir -p "${CACHE_DIR}"
docker buildx build --cache-from "type=local,src=${CACHE_DIR}" \
    --cache-to "type=local,dest=${CACHE_DIR},mode=max" \
    --progress=plain --load -t "${TAG}" . 2>&1
echo "=== Done: ${TAG} ==="