When Git starts, one of the first things it will do is to call
`initialize_the_repository()`. This function sets up both the global
`the_repository` and `the_index` variables as required. Part of that
setup is also to set `the_repository.index = &the_index` so that the
index can be accessed via the repository.
When calling `repo_init()` on a repository though we set the complete
struct to all-zeroes, which will also cause us to unset the `index`
pointer. And as we don't re-initialize the index in that function, we
will end up with a `NULL` pointer here.
This has been fine until now becaues this function is only used to
create a new repository. git-init(1) does not access the index at all
after initializing the repository, whereas git-checkout(1) only uses
`the_index` directly. We are about to remove `the_index` though, which
will uncover this partially-initialized repository structure.
Refactor the code and create a common `initialize_repository()` function
that gets called from `repo_init()` and `initialize_the_repository()`.
This function sets up both the repository and the index as required.
Like this, we can easily special-case when `repo_init()` gets called
with `the_repository`.
Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
repository.c | 28 +++++++++++++++++-----------
1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/repository.c b/repository.c
index e15b416944..d64d15d952 100644
--- a/repository.c
+++ b/repository.c
@@ -25,17 +25,20 @@ static struct repository the_repo;
struct repository *the_repository;
struct index_state the_index;
+static void initialize_repository(struct repository *repo,
+ struct index_state *index)
+{
+ repo->index = index;
+ repo->objects = raw_object_store_new();
+ repo->remote_state = remote_state_new();
+ repo->parsed_objects = parsed_object_pool_new();
+ index_state_init(index, repo);
+}
+
void initialize_the_repository(void)
{
the_repository = &the_repo;
-
- the_repo.index = &the_index;
- the_repo.objects = raw_object_store_new();
- the_repo.remote_state = remote_state_new();
- the_repo.parsed_objects = parsed_object_pool_new();
-
- index_state_init(&the_index, the_repository);
-
+ initialize_repository(the_repository, &the_index);
repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
}
@@ -188,9 +191,12 @@ int repo_init(struct repository *repo,
struct repository_format format = REPOSITORY_FORMAT_INIT;
memset(repo, 0, sizeof(*repo));
- repo->objects = raw_object_store_new();
- repo->parsed_objects = parsed_object_pool_new();
- repo->remote_state = remote_state_new();
+ if (repo == the_repository) {
+ initialize_repository(the_repository, &the_index);
+ } else {
+ ALLOC_ARRAY(repo->index, 1);
+ initialize_repository(repo, repo->index);
+ }
if (repo_init_gitdir(repo, gitdir))
goto error;
--
2.44.GIT
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