runif

Runif

runif runs commands only when a given environment variable is set.

Usage

Usage:
  runif [OPTIONS] Key Command Args...

Application Options:
  -d, --delay-exit=SECONDS    Delay program exit by this many seconds when command does not get run (0)
  -e, --exit-with-error       Exit with non-zero exit status when Key is unset or false (false)

Help Options:
  -h, --help                  Show this help message

Arguments:
  Key:                        The name of the environment variable that must be true in order for command to be run
  Command:                    The command to run
  Args:                       Arguments to pass to command

Releases

Stable releases are available for all Go-supported architectures on the GitHub releases page. All releases are signed with my GPG key as published on keybase.

Example

The following invocation will run cron in the foreground if there is an environment variable RUN_CRON with a value that evaluates to true ("1", "yes" or "true"):

runif RUN_CRON -- cron -f

Note: The -- denotes the end of argument flags to runif. This ensures the -f flag to cron isn't interpreted as a flag to runif.

License

The MIT License (MIT)

Copyright (c) 2014 Nick Groenen nick@groenen.me

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.