Re: [PATCH 01/11] string_list: print_string_list to use trace_printf

[Jeff King <peff@peff.net>]

On Thu, Sep 06, 2018 at 09:52:28AM -0700, Junio C Hamano wrote:

> Stefan Beller <sbeller@google.com> writes:
> 
> > It is a debugging aid, so it should print to the debugging channel.
> 
> ... and rename it with trace_ prefix.
> 
> Use of trace_printf() is nice, as we can control its behavior at
> runtime ;-)

Yes, though...

> > -void print_string_list(const struct string_list *p, const char *text)
> > +void trace_print_string_list(const struct string_list *p, const char *text)
> >  {
> >  	int i;
> >  	if ( text )
> > -		printf("%s\n", text);
> > +		trace_printf("%s\n", text);
> >  	for (i = 0; i < p->nr; i++)
> > -		printf("%s:%p\n", p->items[i].string, p->items[i].util);
> > +		trace_printf("%s:%p\n", p->items[i].string, p->items[i].util);
> >  }

It seems funny that we'd iterate through the list checking over and over
whether tracing is enabled.

Should this do:

  if (!trace_want(&trace_default_key))
	return;

at the top? (Or possibly even take a trace key from the caller, so that
it can use whatever context makes sense for this particular list?)

-Peff