Yargs: How would I describe a positional argument?

[wearhere]

Let's say that I'm configuring yargs like so:

var argv = require('yargs')
  .usage('Usage: $0 <sourceDir>')
  .demand(1)
  .argv;

How would I .describe the sourceDir argument?

This similar issue discussed positional arguments to commands, but note that I am not using a command here, but rather would like to describe a top-level positional argument.

[bcoe]

@wearhere we've been talking about adding top-level commands, which I think could address this issue well.

[popomore]

@bcoe How is the progress of this issue?

[atian25]

@bcoe +1 for this

[bcoe]

this is now possible with default commands and .positional() 🎉

var argv = require('./')
  .usage('$0 <source-dir>', 'performs operation on source-dir', (yargs) => {
    yargs.positional('source-dir', {
      describe: 'this is the source directory'
    })
  })
  .demand(1)
  .argv;

console.info(argv)