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commit-graph: not compatible with grafts

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Augment commit_graph_compatible(r) to return false when the given
repository r has commit grafts or is a shallow clone. Test that in these
situations we ignore existing commit-graph files and we do not write new
commit-graph files.

Helped-by: Jakub Narebski <jnareb@gmail.com>
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 18:24:30 +00:00 committed by Junio C Hamano
parent d6538246d3
commit 20fd6d5799
4 changed files with 46 additions and 1 deletions
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6
commit-graph.c
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@ -68,6 +68,12 @@ static int commit_graph_compatible(struct repository *r)
return 0;
}
prepare_commit_graft(r);
if (r->parsed_objects && r->parsed_objects->grafts_nr)
return 0;
if (is_repository_shallow(r))
return 0;
return 1;
}

2
commit.c
View File

@ -209,7 +209,7 @@ static int read_graft_file(struct repository *r, const char *graft_file)
return 0;
}
static void prepare_commit_graft(struct repository *r)
void prepare_commit_graft(struct repository *r)
{
char *graft_file;

1
commit.h
View File

@ -202,6 +202,7 @@ typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
struct commit_graft *read_graft_line(struct strbuf *line);
int register_commit_graft(struct repository *r, struct commit_graft *, int);
void prepare_commit_graft(struct repository *r);
struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid);
extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2);

38
t/t5318-commit-graph.sh
View File

@ -281,6 +281,44 @@ test_expect_success 'replace-objects invalidates commit-graph' '
)
'
test_expect_success 'commit grafts invalidate commit-graph' '
cd "$TRASH_DIRECTORY" &&
test_when_finished rm -rf graft &&
git clone full graft &&
(
cd graft &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph &&
H1=$(git rev-parse --verify HEAD~1) &&
H3=$(git rev-parse --verify HEAD~3) &&
echo "$H1 $H3" >.git/info/grafts &&
git -c core.commitGraph=false log >expect &&
git -c core.commitGraph=true log >actual &&
test_cmp expect actual &&
git commit-graph write --reachable &&
git -c core.commitGraph=false --no-replace-objects log >expect &&
git -c core.commitGraph=true --no-replace-objects log >actual &&
test_cmp expect actual &&
rm -rf .git/objects/info/commit-graph &&
git commit-graph write --reachable &&
test_path_is_missing .git/objects/info/commit-graph
)
'
test_expect_success 'replace-objects invalidates commit-graph' '
cd "$TRASH_DIRECTORY" &&
test_when_finished rm -rf shallow &&
git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
(
cd shallow &&
git commit-graph write --reachable &&
test_path_is_missing .git/objects/info/commit-graph &&
git fetch origin --unshallow &&
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