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authorLibravatar Taylor Blau <me@ttaylorr.com>2021-08-24 12:15:54 -0400
committerLibravatar Junio C Hamano <gitster@pobox.com>2021-08-24 13:21:13 -0700
commit3ba3d0621b6822e974f06123db9394b33e454ed7 (patch)
tree1109de708b1903da2496b273de98daf057e2c4e4 /t/perf/p3404-rebase-interactive.sh
parentpack-bitmap.c: harden 'test_bitmap_walk()' to check type bitmaps (diff)
downloadtgif-3ba3d0621b6822e974f06123db9394b33e454ed7.tar.xz
pack-bitmap-write.c: gracefully fail to write non-closed bitmaps
The set of objects covered by a bitmap must be closed under reachability, since it must be the case that there is a valid bit position assigned for every possible reachable object (otherwise the bitmaps would be incomplete). Pack bitmaps are never written from 'git repack' unless repacking all-into-one, and so we never write non-closed bitmaps (except in the case of partial clones where we aren't guaranteed to have all objects). But multi-pack bitmaps change this, since it isn't known whether the set of objects in the MIDX is closed under reachability until walking them. Plumb through a bit that is set when a reachable object isn't found. As soon as a reachable object isn't found in the set of objects to include in the bitmap, bitmap_writer_build() knows that the set is not closed, and so it now fails gracefully. A test is added in t0410 to trigger a bitmap write without full reachability closure by removing local copies of some reachable objects from a promisor remote. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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