Auto relaunch specific application when it crash. (MacOS)

bgapp.sh

#!/bin/bash

# you can setup crontab to run this script periodically
# require pidof install in /usr/local/bin
# read config from ~/.bgapp
ret=0
while read s; do
    IFS="|"; cfg=($s) ; unset IFS;
    if [ "${#cfg[@]}" = "2" ]; then
        if [ -z "`/usr/local/bin/pidof ${cfg[0]}`" ]; then
            # echo "launch \"${cfg[0]}\": ${cfg[1]} &"
            osascript -e "display notification \"launch \\\"${cfg[0]}\\\"\" with title \"bgapp\""
            eval "${cfg[1]}"
        fi
    elif [ -n "$s" ]; then
        echo "Invalid line in ~/.bgapp : \"\""
        ret=1
    fi
    #echo $?
done < $HOME/.bgapp

exit $ret

crontab

# assume you place bgapp in $HOME/bin
* * * * * $HOME/bin/bgapp.sh

example-config.bgapp

Spectacle|open -a Spectacle
BitBar|open -a BitBar
mongod|mongod --fork --syslog
godoc|nohup ~/bin/godoc -http=:12345 &

for MacOS