diff options
| -rw-r--r-- | commit-graph.c | 24 | ||||
| -rw-r--r-- | commit-graph.h | 8 | ||||
| -rw-r--r-- | revision.c | 18 |
3 files changed, 40 insertions, 10 deletions
diff --git a/commit-graph.c b/commit-graph.c index 8c4c7262c8..00614acd65 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -891,6 +891,30 @@ static int find_commit_pos_in_graph(struct commit *item, struct commit_graph *g, } } +struct commit *lookup_commit_in_graph(struct repository *repo, const struct object_id *id) +{ + struct commit *commit; + uint32_t pos; + + if (!repo->objects->commit_graph) + return NULL; + if (!search_commit_pos_in_graph(id, repo->objects->commit_graph, &pos)) + return NULL; + if (!repo_has_object_file(repo, id)) + return NULL; + + commit = lookup_commit(repo, id); + if (!commit) + return NULL; + if (commit->object.parsed) + return commit; + + if (!fill_commit_in_graph(repo, commit, repo->objects->commit_graph, pos)) + return NULL; + + return commit; +} + static int parse_commit_in_graph_one(struct repository *r, struct commit_graph *g, struct commit *item) diff --git a/commit-graph.h b/commit-graph.h index 96c24fb577..04a94e1830 100644 --- a/commit-graph.h +++ b/commit-graph.h @@ -41,6 +41,14 @@ int open_commit_graph(const char *graph_file, int *fd, struct stat *st); int parse_commit_in_graph(struct repository *r, struct commit *item); /* + * Look up the given commit ID in the commit-graph. This will only return a + * commit if the ID exists both in the graph and in the object database such + * that we don't return commits whose object has been pruned. Otherwise, this + * function returns `NULL`. + */ +struct commit *lookup_commit_in_graph(struct repository *repo, const struct object_id *id); + +/* * It is possible that we loaded commit contents from the commit buffer, * but we also want to ensure the commit-graph content is correctly * checked and filled. Fill the graph_pos and generation members of diff --git a/revision.c b/revision.c index 80a59896b9..0dabb5a0bc 100644 --- a/revision.c +++ b/revision.c @@ -360,20 +360,18 @@ static struct object *get_reference(struct rev_info *revs, const char *name, unsigned int flags) { struct object *object; + struct commit *commit; /* - * If the repository has commit graphs, repo_parse_commit() avoids - * reading the object buffer, so use it whenever possible. + * If the repository has commit graphs, we try to opportunistically + * look up the object ID in those graphs. Like this, we can avoid + * parsing commit data from disk. */ - if (oid_object_info(revs->repo, oid, NULL) == OBJ_COMMIT) { - struct commit *c = lookup_commit(revs->repo, oid); - if (!repo_parse_commit(revs->repo, c)) - object = (struct object *) c; - else - object = NULL; - } else { + commit = lookup_commit_in_graph(revs->repo, oid); + if (commit) + object = &commit->object; + else object = parse_object(revs->repo, oid); - } if (!object) { if (revs->ignore_missing) |