# determine if a retry should be attempted.
# Example: retry.sh "connection timed out" ./my-flaky-script.sh some args
# This will run "my-flaky-script.sh", retrying any failed runs that output "connection timed out" up
# to 5 times.

function fail {
  echo "${1}" >&2
  exit 1
}

function isatty() {
 if [ -t 1 ] ; then
   return 0
  else