bash retry

bash retry function.sh

#!/bin/bash
# Retry
# set ATTEMPTS and TIMEOUT before calling
function retry {
  local max_attempts=${ATTEMPTS-5}
  local timeout=${TIMEOUT-1}
  local attempt=0
  local exitCode=0
  while (( $attempt < $max_attempts ))
  do      
    set +e      
    "$@"      
    exitCode=$?
    set -e
    if [[ ${exitCode} == 0 ]] || [[ ${exitCode} == 52 ]]; then
      break
    fi
    echo "Failure! Retrying in $timeout.." 1>&2
    sleep ${timeout}
    attempt=$(( attempt + 1 ))
    timeout=$(( timeout * 2 ))
  done
  if [[ ${exitCode} != 0 ]]; then
    echo "You've failed me for the last time! ($@)" 1>&2
  fi
  return ${exitCode}}
}