Retry a bash command until successful.

retry

#!/bin/bash

if [ "$1" == "-h" ] || [ "$1" == "--help" ] || [ "$1" == "" ]; then
    echo "Usage: $(basename $0) n command"
    echo "Execute command n times or until it succeeds (exit code 0)."
    exit $([ $1 ] || echo 1)
fi

control_c() {
    echo "$(tput setaf 1)Killing process per user request.$(tput sgr0)"
    [ $EXIT_CODE ] && kill $EXIT_CODE
    exit
}

trap control_c SIGINT

RETRY_MAX=$1
shift
for i in $(seq 1 $RETRY_MAX); do
    [ "$i" != "1" ] && echo "$(tput setaf 3)Retrying (attempt #$i):" "$@" "$(tput sgr0)"
    "$@"
    EXIT_CODE=$?
    [ "$EXIT_CODE" == "0" ] && break
    echo "$(tput setaf 1)Command failed with code $EXIT_CODE.$(tput sgr0)"
done