commit: write commit-graph with bloom filters

The GIT_TEST_COMMIT_GRAPH environment variable updates the commit-
graph file whenever "git commit" is run, ensuring that we always
have an updated commit-graph throughout the test suite. The
GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS environment variable was
introduced to write the changed-path Bloom filters whenever "git
commit-graph write" is run. However, the GIT_TEST_COMMIT_GRAPH
trick doesn't launch a separate process and instead writes it
directly.

Update the "git commit" builtin to write changed-path Bloom filters
when both GIT_TEST_COMMIT_GRAPH and GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS
are enabled.

Signed-off-by: Derrick Stolee <[email protected]>

Author: derrickstolee

builtin/commit.c

@@ -1701,7 +1701,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		      "not exceeded, and then \"git restore --staged :/\" to recover."));
 
 	if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) &&
-	    write_commit_graph_reachable(the_repository->objects->odb, 0, NULL))
+	    write_commit_graph_reachable(the_repository->objects->odb,
+					 git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0) ? COMMIT_GRAPH_WRITE_BLOOM_FILTERS : 0,
+					 NULL))
 		return 1;
 
 	repo_rerere(the_repository, 0);