Ability to ignore unknown flags

[rajatjindal]

I am trying to write something like follows:

original() {
./mycobracmd cmd1 $@
./original $@
}

I do something based on the subset of flags implemented by original command, and want to ignore rest of the flags.

Do you think this can be implemented. I will be more than happy to do a PR if acceptable.

[svend]

I have a use for this as well. I have a wrapper for kubernetes CLI tools like kubectl and helm, and I need to parse the context flag, and ignore the other flags. Currently I'm using Python's parse_known_args().

[rajatjindal]

I have got this working on with changes to pflag and cobra in my vendor directory, but changes are really ugly

Once i have some more time i will try to make them less ugly and open pr

[rajatjindal]

I've opened spf13/pflag#160 to support unknown flags in pflag.

once (and if) that PR is approved, I have changes ready for Cobra PR.