Conteinerizando um aplicativo Node.js para desenvolvimento com o Docker Compose

				
					
[label ~/node_project/app/wait-for.sh]

#!/bin/sh



# original script: https://github.com/eficode/wait-for/blob/master/wait-for



TIMEOUT=15

QUIET=0



echoerr() {

 if [ "$QUIET" -ne 1 ]; then printf "%s\n" "$*" 1>&2; fi

}



usage() {

 exitcode="$1"

 cat << USAGE >&2

Usage:

 $cmdname host:port [-t timeout] [-- command args]

 -q | --quiet Do not output any status messages

 -t TIMEOUT | --timeout=timeout Timeout in seconds, zero for no timeout

 -- COMMAND ARGS Execute command with args after the test finishes

USAGE

 exit "$exitcode"

}



wait_for() {

 for i in `seq $TIMEOUT` ; do

 nc -z "$HOST" "$PORT" > /dev/null 2>&1



 result=$?

 if [ $result -eq 0 ] ; then

 if [ $# -gt 0 ] ; then

 exec "$@"

 fi

 exit 0

 fi

 sleep 1

 done

 echo "Operation timed out" >&2

 exit 1

}



while [ $# -gt 0 ]

do

 case "$1" in

 *:* )

 HOST=$(printf "%s\n" "$1"| cut -d : -f 1)

 PORT=$(printf "%s\n" "$1"| cut -d : -f 2)

 shift 1

 ;;

 -q | --quiet)

 QUIET=1

 shift 1

 ;;

 -t)

 TIMEOUT="$2"

 if [ "$TIMEOUT" = "" ]; then break; fi

 shift 2

 ;;

 --timeout=*)

 TIMEOUT="${1#*=}"

 shift 1

 ;;

 --)

 shift

 break

 ;;

 --help)

 usage 0

 ;;

 *)

 echoerr "Unknown argument: $1"

 usage 1

 ;;

 esac

done



if [ "$HOST" = "" -o "$PORT" = "" ]; then

 echoerr "Error: you need to provide a host and port to test."

 usage 2

fi



wait_for "$@"