Retry running a command if fails.

retry.sh

#!/usr/bin/env bash

## date:   2022-01-19
## author: duruyao@gmail.com
## desc:   retry running a command if fails
## usage:  retry <COMMAND>

set -euo pipefail

command=("$@")
timeout="5s"
logfile="/tmp/retry/$(TZ=UTC-8 date "+%Y-%m-%d")/$(echo "${RANDOM}" | md5sum | head -c 20).log"

mkdir -p "$(dirname "${logfile}")"
printf "[%19s] Run '%s', see '%s' for more output\n" "$(TZ=UTC-8 date "+%Y-%m-%d %H:%M:%S")" "${command[*]}" "${logfile}"

while ! (bash -x -c "${command[@]+"${command[@]}"}" 1>>"${logfile}" 2>&1); do
  sleep "${timeout}"
  printf "[%19s] Run '%s', see '%s' for more output\n" "$(TZ=UTC-8 date "+%Y-%m-%d %H:%M:%S")" "${command[*]}" "${logfile}"
done