Question about error call .storeOptionsAsProperties() before adding options

[johannchopin]

i've written this tiny cli with the option port:

  program
    .version('1.0.0', '-v, --version', 'output the current version')
    .option('-p, --port <number>', 'port to serve Restapify instance')

Sadly it seems to conflict with a property on Command:

    option 'port' clashes with existing property 'port' on Command
    - call storeOptionsAsProperties(false) to store option values safely,
    - or call storeOptionsAsProperties(true) to suppress this check,
    - or change option name

So I made this change like mentioned here:

  program
    .storeOptionsAsProperties(false)
    .passCommandToAction(false)

  program
    .version('1.0.0', '-v, --version', 'output the current version')
    .option('-p, --port <number>', 'port to serve Restapify instance')

But then I get this curious error which disturb me a bit because I call it before defining options:

call .storeOptionsAsProperties() before adding options

Has someone an idea what I'm doing wrong here?

[shadowspawn]

The way the options are stored by default is changing in Commander 7 because of the potential for conflicts with existing properties. See #1229 for some history.

However, I can not reproduce either the port conflict or the error to call .storeOptionsAsProperties() before adding options with your program fragment.

Are you using the global program rather than creating a new Command? I suspect some other piece of code is also using the global, and adding a port option with a default value!

I expect the behaviour will change if you create a new Command, but you might want to track down the source of the conflict too:

const { Command } = require('commander');
const program = new Command();

[johannchopin]

Thanks @shadowspawn you are right I was just using import { program } from 'commander'. With the instantiation of the Command class it's working like a charm 👍 I just figured that it was well mentioned in the README to instantiate this class so sorry to waste you time 😅