Yargs: Create new instance of yargs to support console use case

[DaelDe]

I am implementing a console where different plugins can provide their own commands and command help. For this use case I need to have a new instance of yargs for each plugin. At the moment it seems there is only one global instance sharing all the options.

Is this possible?

[bcoe]

Hey @DaelDe 👋 sorry for the slow reply.

You should be able to do this by using require('yargs/yargs'), rather than using the singleton.

const Yargs = require('yargs/yargs')
const argv = Yargs(process.argv.slice(2)).argv

Please let me know if this does the trick for you.

_Edit: and feel free to re-open if it doesn't._

[DaelDe]

Grrreat, thanks :)

[DaelDe]

Actually it does not work as expected. I am able to create many instances but in the help the name of the script is printed. I create one yargs instance for one sub-command. How can I tell xargs to use another script name?

At the moment I get the following from showHelp:

Main.js [command]

Commands:
  Main.js channels  Lists channels and statistics                  [aliases: ch]
...

But I want to set Main.js to something else. Just setting the first value in argv array does not work. How can I achieve that. I found nothing in the docs...

[gusvargas]

@DaelDe seems a bit hacky but this works:

function createYargs() {
  const y = yargs(process.argv.slice(2));
  y.$0 = 'npm';
  return y;
}

createYargs()
  .command('install <package>', 'install stuff')
  .argv

The script name or node command is available at argv.$0 similarly to how $0 works in bash or perl.
https://github.com/yargs/yargs/blob/master/docs/api.md

[DaelDe]

@gusvargas grrreat, this was the last missing piece. Works like a charm now 👍