dade47c06c (commit-graph: add repo arg to graph readers, 2018-07-11)
brought more independence from the_repository to the commit graph, however
it was not completely independent of the_repository, as the previous
patches show.
To ensure we're not accessing the_repository by accident, we'd ideally
assign NULL to the_repository to trigger a segfault on access.
We currently have a temporary hack in cache.h, which relies on
the_hash_algo (which is a short form of the_repository->hash_algo) to
be set, so we cannot do that. The next best thing is to set all fields of
the_repository to 0, so any accidental access is more likely to be found.
Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
cache.h | 2 ++
t/helper/test-repository.c | 10 ++++++++++
2 files changed, 12 insertions(+)
diff --git a/cache.h b/cache.h
index f7fabdde8f..9f535040af 100644
--- a/cache.h
+++ b/cache.h
@@ -1035,6 +1035,8 @@ static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
*
* This will need to be extended or ripped out when we learn about
* hashes of different sizes.
+ *
+ * When ripping this out, see TODO in test-repository.c.
*/
if (the_hash_algo->rawsz != 20)
BUG("hash size not yet supported by hashcmp");
diff --git a/t/helper/test-repository.c b/t/helper/test-repository.c
index 6a84a53efb..f7f8618445 100644
--- a/t/helper/test-repository.c
+++ b/t/helper/test-repository.c
@@ -17,6 +17,11 @@ static void test_parse_commit_in_graph(const char *gitdir, const char *worktree,
setup_git_env(gitdir);
+ memset(the_repository, 0, sizeof(*the_repository));
+
+ /* TODO: Needed for temporary hack in hashcmp, see 183a638b7da. */
+ repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
+
if (repo_init(&r, gitdir, worktree))
die("Couldn't init repo");
@@ -43,6 +48,11 @@ static void test_get_commit_tree_in_graph(const char *gitdir,
setup_git_env(gitdir);
+ memset(the_repository, 0, sizeof(*the_repository));
+
+ /* TODO: Needed for temporary hack in hashcmp, see 183a638b7da. */
+ repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
+
if (repo_init(&r, gitdir, worktree))
die("Couldn't init repo");
--
2.19.1.930.g4563a0d9d0-goog
