Duplicate in cmd line arguments are not checked (was: --verbose does not accept empty value)

[kelson42]

$ mw --mwUrl="Https://de.wikipedia.org/" --verbose

....

**********

verbose should be empty or one of [info, log, warn, error, quiet].

**********

[pavel-karatsiuba]

@kelson42 Excidently found out that you will get such an error if you use --verbose parameter more than one time.

Example to reproduce the error:
$ mw --verbose=info --adminEmail="[email protected]" --mwUrl="Https://de.wikipedia.org/" --verbose

[kelson42]

No way to limit to one with yargs?

[pavel-karatsiuba]

@kelson42 I see two ways to fix it:

1. Set yargs option duplicate-arguments-array to false. In this case, if you set more than one parameter with the same name, then will be used the last one. This option will take effect for all parameters.
2. Change the verbose sanitizing function to check this situation and show the error message: "only one --verbose parameter allowed."

[kelson42]

@kelson42 Excidently found out that you will get such an error if you use --verbose parameter more than one time.

Example to reproduce the error: $ mw --verbose=info --adminEmail="[email protected]" --mwUrl="Https://de.wikipedia.org/" --verbose

OK, was definitly to stupid to get that error on my side. Sorry for the misleading ticket/PR.