firebase-ios-sdk/scripts/third_party/travis/retry.sh

#!/bin/bash

#MIT LICENSE
#
#Copyright (c) 2018 Travis CI GmbH <contact+travis-build@travis-ci.org>
#
#Permission is hereby granted, free of charge, to any person obtaining a copy of
#this software and associated documentation files (the "Software"), to deal in
#the Software without restriction, including without limitation the rights to
#use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
#the Software, and to permit persons to whom the Software is furnished to do so,
#subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in all
#copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
#FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
#COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
#IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
#CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# From https://github.com/tianon/travis-build/blob/e3400b7bd417407492e3916e9f7a62315f584ad5/lib/travis/build/templates/header.sh

ANSI_RED="\033[31;1m"
ANSI_GREEN="\033[32;1m"
ANSI_YELLOW="\033[33;1m"
ANSI_RESET="\033[0m"
ANSI_CLEAR="\033[0K"

# Number of attempts.
RETRY_COUNT=2

travis_retry() {
  local result=0
  local count=1
  while [ $count -le $RETRY_COUNT ]; do
    [ $result -ne 0 ] && {
      echo -e "\n${ANSI_RED}The command \"$@\" failed. Retrying, $count of ${RETRY_COUNT}.${ANSI_RESET}\n" >&2
    }
    "$@" && { result=0 && break; } || result=$?
    count=$(($count + 1))
    sleep 1
  done

  [ $count -gt $RETRY_COUNT ] && {
    echo -e "\n${ANSI_RED}The command \"$@\" failed ${RETRY_COUNT} times.${ANSI_RESET}\n" >&2
  }

  return $result
}

travis_retry "$@"