#!/usr/bin/env bash set -euxo pipefail if [[ $# -lt 1 || $# -gt 2 ]]; then    echo "usage: $0 <MAX_SIZE_IN_GB> [SMALL_CLEAN_SIZE_IN_GB]"    exit 1fi if ! [[ -d target ]]; then    echo "target directory does not exist yet"    exit 0fi max_size_gb=$1small_clean_size_gb=${2:-} if [[ -n "${small_clean_size_gb}" && ${small_clean_size_gb} -ge ${max_size_gb} ]]; then    echo "error: small clean threshold (${small_clean_size_gb}gb) must be smaller than max size (${max_size_gb}gb)"    exit 1fi current_size=$(du -s target | cut -f1)current_size_gb=$(( ${current_size} / 1024 / 1024 )) echo "target directory size: ${current_size_gb}gb. max size: ${max_size_gb}gb" if [[ ${current_size_gb} -gt ${max_size_gb} ]]; then    echo "clearing target directory"    shopt -s dotglob    rm -rf target/*elif [[ -n "${small_clean_size_gb}" && ${current_size_gb} -gt ${small_clean_size_gb} ]]; then    echo "running cargo clean --workspace (size above small clean threshold of ${small_clean_size_gb}gb)"    cargo clean --workspacefi