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commit-graph: not compatible with replace objects

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Create new method commit_graph_compatible(r) to check if a given
repository r is compatible with the commit-graph feature. Fill the
method with a check to see if replace-objects exist. Test this
interaction succeeds, including ignoring an existing commit-graph and
failing to write a new commit-graph. However, we do ensure that
we write a new commit-graph by setting read_replace_refs to 0, thereby
ignoring the replace refs.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2018-08-20 18:24:27 +00:00
committed by Junio C Hamano
parent b775896342
commit d6538246d3
5 changed files with 50 additions and 1 deletions
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22
t/t5318-commit-graph.sh
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@ -259,6 +259,28 @@ test_expect_success 'check that gc computes commit-graph' '
test_cmp commit-graph-after-gc $objdir/info/commit-graph
'
test_expect_success 'replace-objects invalidates commit-graph' '
cd "$TRASH_DIRECTORY" &&
test_when_finished rm -rf replace &&
git clone full replace &&
(
cd replace &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph &&
git replace HEAD~1 HEAD~2 &&
git -c core.commitGraph=false log >expect &&
git -c core.commitGraph=true log >actual &&
test_cmp expect actual &&
git commit-graph write --reachable &&
git -c core.commitGraph=false --no-replace-objects log >expect &&
git -c core.commitGraph=true --no-replace-objects log >actual &&
test_cmp expect actual &&
rm -rf .git/objects/info/commit-graph &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph
)
'
# the verify tests below expect the commit-graph to contain
# exactly the commits reachable from the commits/8 branch.
# If the file changes the set of commits in the list, then the