status-react/scripts/wait-for.sh

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#!/usr/bin/env bash
set -e
TIMEOUT=${1}
shift
PGREP_FILTER=${@}
SLEEP_SEC=5
STEPS=$((TIMEOUT / SLEEP_SEC))
# use UID to restrict search
PGREP_OPTS="-U ${UID} -f"
if [[ -z ${PGREP_OPTS} ]]; then
echo "No pgrep options name specified!" >&2
exit 1
fi
echo "Checking for process: '${PGREP_FILTER}'"
for ((i = 0; i < ${STEPS}; i += 1)); do
if pgrep ${PGREP_OPTS} "${PGREP_FILTER}" > /dev/null; then
echo "Process found. Sleeping ${SLEEP_SEC}..." >&2
sleep ${SLEEP_SEC}
else
echo "Process '${PGREP_FILTER}' gone." >&2
exit 0
fi
done
echo "Timeout reached! (${TIMEOUT}s) Process still up: ${PGREP_OPTS}" >&2
echo "Following processes matched:"
# show what is still up
ps u $(pgrep -l ${PGREP_OPTS} "${PGREP_FILTER}" | cut -d' ' -f1 | xargs -I{} echo -n "-p {} ")
exit 1