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repack: point out a bug handling stale shallow info

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A `git fetch --prune` can turn previously-reachable objects unreachable,
even commits that are in the `shallow` list. A subsequent `git repack
-ad` will then unceremoniously drop those unreachable commits, and the
`shallow` list will become stale. This means that when we try to fetch
with a larger `--depth` the next time, we may end up with:

	fatal: error in object: unshallow <commit-hash>

Reported by Alejandro Pauly.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2018-10-24 08:56:10 -07:00 committed by Junio C Hamano
parent cae598d998
commit 328a435182
1 changed files with 27 additions and 0 deletions
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27
t/t5537-fetch-shallow.sh
View file

@ -186,6 +186,33 @@ EOF
test_cmp expect actual
'
test_expect_failure '.git/shallow is edited by repack' '
git init shallow-server &&
test_commit -C shallow-server A &&
test_commit -C shallow-server B &&
git -C shallow-server checkout -b branch &&
test_commit -C shallow-server C &&
test_commit -C shallow-server E &&
test_commit -C shallow-server D &&
d="$(git -C shallow-server rev-parse --verify D^0)" &&
git -C shallow-server checkout master &&
git clone --depth=1 --no-tags --no-single-branch \
"file://$PWD/shallow-server" shallow-client &&
: now remove the branch and fetch with prune &&
git -C shallow-server branch -D branch &&
git -C shallow-client fetch --prune --depth=1 \
origin "+refs/heads/*:refs/remotes/origin/*" &&
git -C shallow-client repack -adfl &&
test_must_fail git -C shallow-client rev-parse --verify $d^0 &&
! grep $d shallow-client/.git/shallow &&
git -C shallow-server branch branch-orig $d &&
git -C shallow-client fetch --prune --depth=2 \
origin "+refs/heads/*:refs/remotes/origin/*"
'
. "$TEST_DIRECTORY"/lib-httpd.sh
start_httpd