On 19 May 2018 at 03:02, Jeff King <p...@peff.net> wrote:
> On Fri, May 18, 2018 at 03:30:44PM -0700, Elijah Newren wrote:
>
>> > would become:
>> >
>> >   msgs[ERROR_WOULD_OVERWRITE] = msgs[ERROR_NOUPTODATE_FILE] =
>> >         string_list_appendf(&opts->msgs_to_free, msg, cmd, cmd)->string;
>> >
>> > I don't know if that's worth it or not (I suspect that there are other
>> > places where appendf would be handy, but I didn't poke around).

This does poke at the `string` member, but there is precedent for doing
that. That also feels much closer to the purpose of a string list than
the fiddling with `strdup_strings` that I do in my patch.

I'll look into this over the weekend. Thanks for the suggestion.

>> The strdup_strings=1 immediately before calling string_list_clear()
>> has been used in one other place in merge-recursive.c, and tripped up
>> the reviewer requiring a big code comment to explain it. (See the very
>> end of 
>> https://public-inbox.org/git/cabpp-bgh7qttfu3kgh4ko5drrxiqjtrnhx_uaqsb6fhxt+9...@mail.gmail.com/
>> ).  So there's already one other place in merge-recursive.c that might
>> benefit from such a change.
>
> Thanks. I knew I had seen such hackery before, but it's nice to have a
> specific site that would benefit.
>
> IMHO the "nodup" variant of string_list is quite often a sign that
> things are more complicated than they need to be. Even in cases that are
> truly pointing to existing strings, is the complication really worth
> saving a few strdups? Perhaps sometimes, but I have a suspicion it's
> mostly premature optimization.
>
>> Maybe someone wants to tackle that as a separate patch series?  (Maybe
>> we make it a micro-project for future GSoC'ers?)
>
> Yeah, I'm fine with these patches if somebody wants to do it separately.
> It would be a good micro-project, but I'd also be just as happy if
> somebody did it before next year. :)

Obviously, I won't be tackling all of that now. I'll just look into
making this final patch better and leave any further cleaning up for
later.

Martin

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