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pickaxe: die when --find-object and --pickaxe-all are combined

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Neither the --pickaxe-all documentation nor --find-object's has ever
suggested that you can combine the two. See f506b8e8b5 (git log/diff:
add -G<regexp> that greps in the patch text, 2010-08-23) and
15af58c1ad (diffcore: add a pickaxe option to find a specific blob,
2018-01-04).

But we've silently tolerated it, which makes the logic in
diffcore_pickaxe() harder to reason about. Let's assert that we won't
have the two combined.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason
2021-04-12 19:15:15 +02:00
committed by Junio C Hamano
parent 188e9e28c5
commit d26ec88009
3 changed files with 8 additions and 0 deletions
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3
diff.c
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@ -4631,6 +4631,9 @@ void diff_setup_done(struct diff_options *options)
if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_G_REGEX_MASK))
die(_("-G and --pickaxe-regex are mutually exclusive, use --pickaxe-regex with -S"));
if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_ALL_OBJFIND_MASK))
die(_("---pickaxe-all and --find-object are mutually exclusive, use --pickaxe-all with -G and -S"));
/*
* Most of the time we can say "there are changes"
* only by checking if there are changed paths, but