#!/usr/bin/env bash
# Build the unsloth-blackwell image on this B200 host (or any Linux host with Docker).
# The build host's GPU is NOT used -- nvcc cross-compiles for sm_100 + sm_120.
#
# Usage:
#   ./build.sh                 # builds unsloth-blackwell:latest pinned to unsloth main
#   TAG=2026.05.1 ./build.sh   # custom tag
#   UNSLOTH_REF=v2026.5.6 UNSLOTH_ZOO_REF=v2026.5.4 ./build.sh   # pin git refs
set -euo pipefail

cd "$(dirname "$0")"

IMAGE_NAME="${IMAGE_NAME:-unsloth-blackwell}"
TAG="${TAG:-latest}"
CUDA_VERSION="${CUDA_VERSION:-12.8.1}"
UBUNTU_VERSION="${UBUNTU_VERSION:-24.04}"
PYTHON_VERSION="${PYTHON_VERSION:-3.12}"
UNSLOTH_REF="${UNSLOTH_REF:-main}"
UNSLOTH_ZOO_REF="${UNSLOTH_ZOO_REF:-main}"

echo "Building ${IMAGE_NAME}:${TAG}"
echo "  CUDA           ${CUDA_VERSION}  Ubuntu ${UBUNTU_VERSION}  Python ${PYTHON_VERSION}"
echo "  unsloth        @${UNSLOTH_REF}"
echo "  unsloth-zoo    @${UNSLOTH_ZOO_REF}"
echo "  arch list      8.0;8.6;8.9;9.0;10.0;12.0+PTX"
echo

DOCKER_BUILDKIT=1 docker build \
    --progress=plain \
    --build-arg CUDA_VERSION="${CUDA_VERSION}" \
    --build-arg UBUNTU_VERSION="${UBUNTU_VERSION}" \
    --build-arg PYTHON_VERSION="${PYTHON_VERSION}" \
    --build-arg UNSLOTH_REF="${UNSLOTH_REF}" \
    --build-arg UNSLOTH_ZOO_REF="${UNSLOTH_ZOO_REF}" \
    -t "${IMAGE_NAME}:${TAG}" \
    .

echo
echo "Built ${IMAGE_NAME}:${TAG}"
echo
echo "Smoke test on this host (B200, sm_100):"
echo "  docker run --rm --gpus all ${IMAGE_NAME}:${TAG} python /workspace/smoke_test.py"
echo
echo "Smoke test on an RTX 5090 host (sm_120):"
echo "  docker pull ${IMAGE_NAME}:${TAG}   # or load .tar"
echo "  docker run --rm --gpus all ${IMAGE_NAME}:${TAG} python /workspace/smoke_test.py"