if [ ! -d yolov5 ]; then echo "Running first-time script." # install dependencies, download COCO, pull Docker git clone https://github.com/ultralytics/yolov5 && sudo chmod -R 777 yolov5 cd yolov5 bash data/scripts/get_coco.sh && echo "Data done." & sudo docker pull ultralytics/yolov5:latest && echo "Docker done." & python -m pip install --upgrade pip && pip install -r requirements.txt && python detect.py && echo "Requirements done." & wait && echo "All tasks done." # finish background tasks

如果 [ ! -d yolov5 ]; 那么就会执行 echo "Running first-time script." 这个命令，意思是如果当前目录下不存在名为 yolov5 的文件夹，则会执行第一次运行的脚本。