Commander calls exit under various circumstances, such as after displaying an error or the help. This is pretty convenient for the caller of a one-shot parse in a CLI, but is a problem when Commander is being used as part of a long running program or if caller wants more control over the failure handling.

Issues:

• optional exit value for Help. (feature request) #188 optional exit value for Help. (feature request)
• process.exit(64) #435 process.exit(64)
• Explicitly return when an error occurs #443 Explicitly return when an error occurs
• Make calls to process.exit() overridable #575 Make calls to process.exit() overridable
• Parse multiple commands without exiting the process #934 Parse multiple commands without exiting the process

Pull Requests:

• Add support for exit codes.  #436 Add support for exit codes.
• Explicitly return from error methods #444 Explicitly return from error methods
• Make process.exit() injectable. #576 Make process.exit() injectable.