railpack

1#!/usr/bin/env bash2#MISE description="Retry a command with exponential backoff"3#USAGE flag "--attempts <attempts>" help="Number of attempts" default="3"4#USAGE arg "<command>" var=#true help="Command to run" double_dash="automatic"5 6set -euo pipefail7 8attempts="${usage_attempts?}"9delay=110 11eval "cmd=($usage_command)"12 13if [[ ${#cmd[@]} -eq 0 ]]; then14  echo "Error: command required" >&215  exit 116fi17 18for ((i = 1; i <= attempts; i++)); do19  if "${cmd[@]}"; then20    exit 021  fi22 23  if [[ $i -lt $attempts ]]; then24    echo "failed, retrying..." >&225    sleep "$delay"26    delay=$((delay * 2))27  fi28done29 30echo "continued to fail after ${attempts} attempts" >&231exit 132