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repack: silence warnings when auto-enabled bitmaps cannot be built

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Depending on various config options, a full repack may not be able to
build a reachability bitmap index (e.g., if pack.packSizeLimit forces us
to write multiple packs). In these cases pack-objects may write a
warning to stderr.

Since 36eba0323d (repack: enable bitmaps by default on bare repos,
2019-03-14), we may generate these warnings even when the user did not
explicitly ask for bitmaps. This has two downsides:

  - it can be confusing, if they don't know what bitmaps are

  - a daemonized auto-gc will write this to its log file, and the
    presence of the warning may suppress further auto-gc (until
    gc.logExpiry has elapsed)

Let's have repack communicate to pack-objects that the choice to turn on
bitmaps was not made explicitly by the user, which in turn allows
pack-objects to suppress these warnings.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2019-07-31 01:39:27 -04:00
committed by Junio C Hamano
parent cc2649ae2d
commit 25575015ca
3 changed files with 36 additions and 11 deletions
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11
t/t7700-repack.sh
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@ -250,4 +250,15 @@ test_expect_success 'no bitmaps created if .keep files present' '
test_must_be_empty actual
'
test_expect_success 'auto-bitmaps do not complain if unavailable' '
test_config -C bare.git pack.packSizeLimit 1M &&
blob=$(test-tool genrandom big $((1024*1024)) |
git -C bare.git hash-object -w --stdin) &&
git -C bare.git update-ref refs/tags/big $blob &&
git -C bare.git repack -ad 2>stderr &&
test_must_be_empty stderr &&
find bare.git/objects/pack -type f -name "*.bitmap" >actual &&
test_must_be_empty actual
'
test_done