Re: [PATCH] commit: reword --author error message

[Michael J Gruber <git@drmicha.warpmail.net>]

Jeff King schrieb am 15.01.2015 um 15:31:
> On Thu, Jan 15, 2015 at 03:23:08PM +0100, Michael J Gruber wrote:
> 
>> If an --author argument is specified but does not contain a '>' then git tries
>> to find the argument within the exiting authors; and gives the error
>> message "No existing author found with '%s'" if there is no match.
>>
>> This is confusing for users who try to specify a valid complete author
>> name.
>>
>> Rename the error message to make it clearer that the failure has two
>> reasons in this case:
>> "Bad --author parameter '%s': neither completely wellformed nor part of
>> an existing one"
> 
> I really like the intent of this patch, but I actually find the new
> message even more confusing.

The main observation is that the current error message is given only
when both interpretations (complete ident, match ident) fail, and the
error message conveys only one when it should do both. I don't care
about the wording either.

> Is this a time when we could use hint() to give a multi-line explanation
> (and probably a matching advice.* config)? Like:
> 
>   hint: If the --author parameter contains angle brackets ("<>"), it
>   hint: is treated as a literal name/email pair to use. If not, then
>   hint: the history is searched for an existing matching author.
> 
> or something?
> 
> -Peff
> 

Well, this basically copies the man page paragraph for that option. I
don't want to set a(nother) precedent for doing this and create yet
another config knob.

The alternative would be to just say "Bad --author parameter '%s'" (or
"Invalid..."), as we do in most cases, and force the user to check the
man page for the definition of "valid". I'm beginning to prefer this
minimalistic approach...

Michael