launcher/docker-images/solar-open2-nvfp4/build.sh

#!/usr/bin/env bash
# Build Solar Open2 250B NVFP4 (Nota) Docker image for DGX Spark (aarch64/sm_121a).
# All build inputs are version-pinned in versions.env and locks/.
#
# Generic driver: forwards every KEY=VAL pin in versions.env as a
# --build-arg to the Dockerfile (no hardcoded variable list). The sm121
# launcher writes a merged versions.env here when a recipe carries
# [build.versions] overrides (recipe wins over the image defaults).
set -euo pipefail
cd "$(dirname "$0")"
TAG="${TAG:-solar-open2-nvfp4:probe}"

ARGS=()
while IFS= read -r line; do
    # Skip blank lines and comments (# ...).
    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:-$HOME/sm121-cache/buildkit}"
mkdir -p "${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} ==="