| #!/usr/bin/env bash |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| function fail { |
| echo $1 >&2 |
| exit 1 |
| } |
| |
| function retry { |
| local n=1 |
| local max=3 |
| local delay=10 |
| while true; do |
| "$@" && break || { |
| if [[ $n -lt $max ]]; then |
| ((n++)) |
| echo "Command failed. Attempt $n/$max:" |
| sleep $delay; |
| else |
| fail "The command has failed after $n attempts." |
| fi |
| } |
| done |
| } |
| |
| retry "$@" |