Support to know if any known command was processed, or any output written

[yanickrochon]

When calling program.parse(process.argv);, I would like to know if any command was processed. Meaning, if the program was invoked with either -h, --help, version or any other command.

For example, if I have this setup

program.command('foo')
 ....
;
program.once('foo', function () { console.log('*** Foo invoked!'); });

program.once('version', function () { console.log('*** Version printed');

this will only output *** Foo invoked! if the command foo is specified in the command-line, but will not output *** Version printed! if version is specified.

Bottom line is that, I'd that, right after program.parse(process.argv);, to know whether anything happened (any output, any command processed, etc.) or not. How can I uniformingly do this?

[SomeKittens]

One possible workaround is to abuse the coercion system:

var fooWasCalled = function (foo) {
  console.log('*** Foo invoked');
  return foo;
};

program
  .option('-f, --foo', fooWasCalled)
  .parse(process.argv);

[yanickrochon]

So... wrap the command action, then. However it doesn't work for version, and would work for -h, --help option only if overridden.

But, as I mentioned, program.once('foo', ...); works for user defined commands, but not for version.

[yanickrochon]

I found a solution :

program.on('*', function (args) {
  console.error('Unknown argument :', args[0]);
  console.error();
  process.exit(1);
});