A Bash function you can use in scripts to retry Buildkite steps. License: MIT

retry.bash

#!/bin/bash

# Retries a command a number of times, with exponential backoff
#
# Usage:
#   retry <number-of-retries> <command>
#
# Examples:
#   retry 3 make test
#   retry 5 curl -O https://buildkite.com/
function retry {
  local retries=$1; shift
  local attempts=1
  local status

  until "$@"; do
    status=$?
    if (( attempts == retries )); then
      echo "Failed $attempts retries"
      return 1
    else
      echo "Retrying $((retries - attempts)) more times..."
      attempts=$((attempts + 1))
      sleep $(((attempts - 2) * 2))
    fi
  done

  return $status
}