Re: [PATCH] git-apply: add --quiet flag

[Junio C Hamano <gitster@pobox.com>]

Junio C Hamano <gitster@pobox.com> writes:

> Jerry Zhang <jerry@skydio.com> writes:
>
>> Replace OPT_VERBOSE with OPT_VERBOSITY.
>
> While it is not an incorrect statement, it is odd to have such an
> implementation detail nobody cares as the first thing in the log
> message, though.
>
>> This adds a --quiet flag to "git apply" so
>> the user can turn down the verbosity.
>
> Sure, I think you can do "apply --no-verbose" to do the same thing
> without any change, but we introduced VERBOSITY to replace VERBOSE
> exactly so that --verbose can be countermanded with --quiet, and
> this patch is a good example of the application of that feature.
>
> I wonder if this deserves a test.

Oh, another thing.  "--quiet" with OPT_VERBOSITY is given negative
values, whose magnitude may be used to express "even more quiet".
This is different from "--no-verbose" that is supported by both
OPT_VERBOSITY and OPT_VERBOSE that resets the variable to 0.

So use of OPT_VERBOSITY() to support both --verbose and --quiet is
good, but you'd need to audit the way the verbosity variable is used
by the code.  "if (verbose) perform_verbosely()" would have to be
rewritten as "if (verbose > verbosity_level) perform_verbosely()" 
or something like that, as the "verbose" variable can take a
negative value to mean "less silent than the usual 0".