mastodon/bin/retry

#!/bin/bash
# https://github.com/travis-ci/travis-build/blob/cbe49ea239ab37b9b38b5b44d287b7ec7a108c16/lib/travis/build/templates/header.sh#L243-L260
#
# MIT LICENSE
#
# Copyright (c) 2016 Travis CI GmbH <contact@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.
retry() {
  local result=0
  local count=1

  while [ $count -le 3 ]; do
    if [ $result -ne 0 ]; then
      echo -e "\n${ANSI_RED}The command \"$@\" failed. Retrying, $count of 3.${ANSI_RESET}\n" >&2
    fi

    "$@" && { result=0 && break; } || result=$?
    count=$(($count + 1))
    sleep 1
  done

  if [ $count -gt 3 ]; then
    echo -e "\n${ANSI_RED}The command \"$@\" failed 3 times.${ANSI_RESET}\n" >&2
  fi

  return $result
}

retry $@