make_commit_env

make_commit_env(){( set -e
    ROOT=$(git rev-parse --show-toplevel)

    COMMIT="$1"
    PY_VERSION="${2:-3.7}"

    COMMIT_ESCAPED=$(echo "${COMMIT}" | sed 's#/#_#g')
    TREE_PATH="${ROOT}/../pytorch_worktrees/tree-${COMMIT_ESCAPED}-repo"

    git worktree prune
    git worktree add $TREE_PATH

    cd $TREE_PATH
    git checkout $COMMIT
    ENV_PATH="$PWD-env"

    git submodule status --recursive | cut -c2- | cut -d ' ' -f 2 | while read submodule; do
        echo $submodule;
        git submodule update --init --reference "${ROOT}/${submodule}" $submodule
    done
    git submodule update --init --recursive

    conda create \
        --no-default-packages \
        -y \
        -p $ENV_PATH \
        python=$PY_VERSION \

    source activate $ENV_PATH

    conda install -y numpy ninja pyyaml mkl mkl-include setuptools cmake cffi hypothesis typing_extensions dataclasses
    conda install -y valgrind -c conda-forge

    time USE_CUDA=0 \
        BUILD_CAFFE2_OPS=0 \
        BUILD_TEST=0 \
        REL_WITH_DEB_INFO=ON \
        python setup.py install
)}