Command flags after arguments are discarded without warning

[qmuntal]

Several folks and I have been hit by this issue:

• notation sign --key=$KEY_NAME $IMAGE works
• notation sign $IMAGE --key=$KEY_NAME does not works and errors out with signing key not found.

The same problem applies to any non-required flag which is used together with an argument, i.e. -p/-u.

Using flags after arguments seems not to be supported by urfave/cli, see urfave/cli#976.

We should at least error early with a meaningful message instead of executing the normal workflow and having a random error message.

@dtzar

[SteveLasker]

+1. I realize the positional parameter shouldn’t have named parameters after.
I like the idea of an error, not even a warning.

[shizhMSFT]

Let's move to github.com/spf13/cobra.

[chloeyin]

Let's move to github.com/spf13/cobra.

I will take a look at it.

[dtzar]

Yes, this would be great! It would also help with the user experience because of the autogenerated help and man pages.