launcher/docker-images/qwen38-flashnext-nvfp4/build.sh

#!/usr/bin/env bash
# Build the SM121-patched Qwen3.8-Flash-Next-NVFP4 image.
#
# Generic driver: forwards every KEY=VAL pin in versions.env as a --build-arg
# to the Dockerfile. TAG is set by the sm121 launcher to the recipe's
# docker_image (manual build: TAG=qwen38-flashnext-nvfp4:local bash build.sh).
set -euo pipefail
cd "$(dirname "$0")"
TAG="${TAG:-qwen38-flashnext-nvfp4:local}"

ARGS=()
while IFS= read -r line; do
    case "$line" in
        ''|\#*) continue ;;
    esac
    key="${line%%=*}"; val="${line#*=}"
    [ -n "$key" ] && ARGS+=(--build-arg "${key}=${val}")
done < versions.env

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 "${ARGS[@]}" --cache-from "type=local,src=${CACHE_DIR}" \
    --cache-to "type=local,dest=${CACHE_DIR},mode=max" \
    --progress=plain --load -t "${TAG}" -f Dockerfile . 2>&1
echo "=== Done: ${TAG} ==="