Bash function for running a command, checking the return code, and re-trying it `x` times after `y` sleep seconds.

retry

#!/bin/bash

# Usage:
# retry <commands...>
# retry <retry times> <commands...>
# retry <retry times> <retry wait> <commands...>

if [[ $2 =~ ^-?[0-9]+$ ]]; then
  cmd="${@:3}"
  retry_times=$1
  retry_wait=$2
elif [[ $1 =~ ^-?[0-9]+$ ]]; then
  cmd="${@:2}"
  retry_times=$1
  retry_wait=1
else
  cmd="$@"
  retry_times=5
  retry_wait=1
fi

c=0
while [ $c -lt $((retry_times+1)) ]; do
  c=$((c+1))
  echo "$(tput setaf 6)Executing \"$cmd\", try $c$(tput sgr0)"
  $(echo $cmd) && echo "$(tput setaf 6)Done!$(tput sgr0)" && exit $?
  if [ ! $c -eq $retry_times ]; then
    echo "$(tput setaf 6)Command failed, will retry in $retry_wait secs$(tput sgr0)"
    sleep $retry_wait
  else
    echo "$(tput setaf 6)Command failed, giving up.$(tput sgr0)"
    exit 1
  fi
done