#!/bin/bash

# AWS EC2 instance startup script https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html

# This script will run only once on first instance start (for a re-start script see mime.sh)

# /home/ubuntu (ubuntu) or /home/ec2-user (amazon-linux) is working dir

# Use >300 GB SSD

cd home/ubuntu

if [ ! -d yolov5 ]; then

  echo "Running first-time script." # install dependencies, download COCO, pull Docker

  git clone https://github.com/ultralytics/yolov5 -b master && sudo chmod -R 777 yolov5

  cd yolov5

  bash data/scripts/get_coco.sh && echo "COCO 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

else

  echo "Running re-start script." # resume interrupted runs

  i=0

  list=$(sudo docker ps -qa) # container list i.e. $'one\ntwo\nthree\nfour'

  while IFS= read -r id; do

    ((i++))

    echo "restarting container $i: $id"

    sudo docker start $id

    # sudo docker exec -it $id python train.py --resume # single-GPU

    sudo docker exec -d $id python utils/aws/resume.py # multi-scenario

  done <<<"$list"

fi