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repack: fix generating multi-pack-index with only non-local packs

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When writing the multi-pack-index with geometric repacking we will add
all packfiles to the index that are part of the geometric sequence. This
can potentially also include packfiles borrowed from an alternate object
directory. But given that a multi-pack-index can only ever include packs
that are part of the main object database this does not make much sense
whatsoever.

In the edge case where all packfiles are contained in the alternate
object database and the local repository has none itself this bug can
cause us to invoke git-multi-pack-index(1) with only non-local packfiles
that it ultimately cannot find. This causes it to return an error and
thus causes the geometric repack to fail.

Fix the code to skip non-local packfiles.

Co-authored-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2023-04-14 08:01:40 +02:00
committed by Junio C Hamano
parent 3d74a2337c
commit 51861340f8
2 changed files with 34 additions and 0 deletions
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11
builtin/repack.c
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@@ -570,6 +570,17 @@ static void midx_included_packs(struct string_list *include,
for (i = geometry->split; i < geometry->pack_nr; i++) {
struct packed_git *p = geometry->pack[i];
/*
* The multi-pack index never refers to packfiles part
* of an alternate object database, so we skip these.
* While git-multi-pack-index(1) would silently ignore
* them anyway, this allows us to skip executing the
* command completely when we have only non-local
* packfiles.
*/
if (!p->pack_local)
continue;
strbuf_addstr(&buf, pack_basename(p));
strbuf_strip_suffix(&buf, ".pack");
strbuf_addstr(&buf, ".idx");