Stefan Beller <[email protected]> writes:

> +static int parse_objfind_opt(struct diff_options *opt, const char *arg)
> +{
> +     struct object_id oid;
> +
> +     if (get_oid(arg, &oid))
> +             return error("unable to resolve '%s'", arg);
> +
> +     if (!opt->objfind)
> +             opt->objfind = xcalloc(1, sizeof(*opt->objfind));
> +
> +     opt->pickaxe = ""; /* trigger pickaxe */

Hmmm.  This feels like an ugly hack to me.  Do we declare that "git
log -S''" never matches anything right now (if that is the case the
I do not think there is any compatibility issues)?

> diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
> index 9476bd2108..0d0c697ae7 100644
> --- a/diffcore-pickaxe.c
> +++ b/diffcore-pickaxe.c
> @@ -124,13 +124,21 @@ static int pickaxe_match(struct diff_filepair *p, 
> struct diff_options *o,
>       mmfile_t mf1, mf2;
>       int ret;
>  
> -     if (!o->pickaxe[0])
> -             return 0;
> -
>       /* ignore unmerged */
>       if (!DIFF_FILE_VALID(p->one) && !DIFF_FILE_VALID(p->two))
>               return 0;
>  
> +     if (o->objfind) {
> +             if ((DIFF_FILE_VALID(p->one) &&
> +                  oidset_contains(o->objfind, &p->one->oid)) ||
> +                 (DIFF_FILE_VALID(p->two) &&
> +                  oidset_contains(o->objfind, &p->two->oid)))
> +                     return 1;
> +     }
> +
> +     if (!o->pickaxe[0])
> +             return 0;
> +

Very nice.  With just one place, the code covers both cases with and
without pickaxe-all option in effect.

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