monitor.sh

#!/usr/bin/env bash

export SODA_SCRIPTS_ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

source ${SODA_SCRIPTS_ROOT}/__echo.sh

#### Websocket Setup
SERVER_PORT=3333
WS_PIPE=/tmp/_websocket.tmp
IN_PIPE=/tmp/_in_websocket.tmp

rm -rf $WS_PIPE
mkfifo $WS_PIPE

rm -rf $IN_PIPE
mkfifo $IN_PIPE


if (( $# < 2 )); then
  echo
  echo "Monitor"
  echo "- Usage: monitor <CMD> <FILES>"
  echo "- <FILES> can also be a glob pattern"
  echo

  exit
fi

SILENT=0

while getopts ":s" opt; do
  case $opt in
    s)
      SILENT=1
      ;;
    \?)
      echo "Invalid option: -$OPTARG" | error
      exit
      ;;
  esac
done

shift $(($OPTIND-1))

CMD=$1
shift

FILES=$*;

if [ $SILENT -eq 0 ]; then
  echo "[monitor]: Watching files..." | status
fi

stat_opts='-f "%m"'

if [[ "$(uname)" == "Linux" ]]; then
  stat_opts='-c "%Y"'
fi

CTIME=$(printf "%i" $(date "+%s"))
mtime=""




echo "Running websocket server..." | status

cat $WS_PIPE | ./scripts/__websocket.sh $IN_PIPE | nc -l $SERVER_PORT > $WS_PIPE &
serverpid=$!

trap ctrl_c INT

ctrl_c() {
  kill $serverpid

  exit
}

while :; do
  sleep 1

  for f in $(echo $FILES); do
    mtime=$(eval stat $stat_opts $f)
    mtime=$(printf "%i" $mtime)
  
    if [ $? -eq 0 ]; then
      if [ $mtime -gt $CTIME ]; then
        CTIME=$(printf "%i" $(date "+%s"))
        
        if [ $SILENT -eq 0 ]; then
          echo '[monitor]: Retrying...' | info
          echo
        fi


        clear
        eval $CMD

        echo "reload" >> $IN_PIPE


        if [ $? -eq 0 ]; then
          if [ $SILENT -eq 0 ]; then
            echo '[monitor]: Successfully restarted $CMD' | success
          fi

        else
          if [ $SILENT -eq 0 ]; then
            echo '[monitor]: Failed to restart $CMD' | error
          fi
        fi
      fi
    else
      echo "[monitor]: $f is not a file."
      exit
    fi
  done
done

kill $serverpid