Bash script to pause docker container after INACTIVE_SEC of inactivity in project files

docker_pause.sh

#!/bin/bash

cd -- "${0%/*}"

CHECK_SEC=60
INACTIVE_SEC=600
DIRECTORY="sameroom"
TIMEOUT_TMP_FILE="./timeout"
DOCKER_NAME="sameroom-dev"

PID=$$

timeout() {
    while true
    do
        sleep 1
        # make sure that parent is running
        kill -s 0 $PID 2>/dev/null || exit
        touch $TIMEOUT_TMP_FILE
        sleep $CHECK_SEC
    done
}

timeout &
TIMEOUT=$!

LASTACTIVE=0;
OLDSTATE="";
fswatch $DIRECTORY $TIMEOUT_TMP_FILE | while read line
do
    NOW=`date +%s`
    if ! echo $line | grep -q timeout
    then
        LASTACTIVE=$NOW
    fi
    SINCELASTACTIVE=$(($NOW-$LASTACTIVE))
    if [[ $SINCELASTACTIVE -gt $INACTIVE_SEC ]]
    then
        STATE="pause"
    else
        STATE="unpause"
    fi
    if [[ "$OLDSTATE" != "$STATE" ]]
    then
        date
        echo DO $STATE
        docker $STATE $DOCKER_NAME
    fi
    # echo line $line $NOW $LASTACTIVE $SINCELASTACTIVE $STATE $OLDSTATE
    OLDSTATE=$STATE

done

kill $TIMEOUT