[PATCH v3 0/7] No more adding submodule ODB as alternate

This is on a merge of jk/ref-paranoia and jt/add-submodule-odb-clean-up (same as v2).

Here's the same patch set except that the repo is plumbed into the ref stores. (Iterators currently do not have any reference to their ref stores, so some of them still need repo fields. But because the ref stores now know their repos, calling code does not need to pass a repo when these iterators are instantiated.)

As you can see from the shorter patch list, this eliminates the need for some patches.

Jonathan Tan (7):
  refs: plumb repo into ref stores
  refs: teach arbitrary repo support to iterators
  refs: peeling non-the_repository iterators is BUG
  merge-{ort,recursive}: remove add_submodule_odb()
  object-file: only register submodule ODB if needed
  submodule: pass repo to check_has_commit()
  submodule: trace adding submodule ODB as alternate

 merge-ort.c                            | 18 +++--------
 merge-recursive.c                      | 41 +++++++++++++-------------
 object-file.c                          |  3 +-
 refs.c                                 | 32 +++++++++++++++-----
 refs/files-backend.c                   | 16 ++++++----
 refs/packed-backend.c                  | 13 ++++++--
 refs/packed-backend.h                  |  3 +-
 refs/ref-cache.c                       | 10 +++++++
 refs/ref-cache.h                       |  1 +
 refs/refs-internal.h                   | 11 +++++--
 strbuf.c                               | 12 ++++++--
 strbuf.h                               |  6 ++--
 submodule.c                            | 18 +++++++++--
 t/t5526-fetch-submodules.sh            |  3 ++
 t/t5531-deep-submodule-push.sh         |  3 ++
 t/t5545-push-options.sh                |  3 ++
 t/t5572-pull-submodule.sh              |  3 ++
 t/t6437-submodule-merge.sh             |  3 ++
 t/t7418-submodule-sparse-gitmodules.sh |  3 ++
 19 files changed, 139 insertions(+), 63 deletions(-)

Range-diff against v2:
 1:  e364b13a37 <  -:  ---------- refs: plumb repo param in begin-iterator functions
 -:  ---------- >  1:  8067397538 refs: plumb repo into ref stores
 2:  ec153eff7b !  2:  c8799d408f refs: teach arbitrary repo support to iterators
    @@ refs/files-backend.c: static struct ref_iterator *files_ref_iterator_begin(
      	base_ref_iterator_init(ref_iterator, &files_ref_iterator_vtable,
      			       overlay_iter->ordered);
      	iter->iter0 = overlay_iter;
    -+	iter->repo = repo;
    ++	iter->repo = ref_store->repo;
      	iter->flags = flags;
      
      	return ref_iterator;
    @@ refs/packed-backend.c: static struct ref_iterator *packed_ref_iterator_begin(
      
      	iter->base.oid = &iter->oid;
      
    -+	iter->repo = repo;
    ++	iter->repo = ref_store->repo;
      	iter->flags = flags;
      
      	if (prefix && *prefix)
 3:  dd1a8871f4 !  3:  e7fb60b7e7 refs: peeling non-the_repository iterators is BUG
    @@ refs/files-backend.c: static struct ref_iterator *files_ref_iterator_begin(
      
      	loose_iter = cache_ref_iterator_begin(get_loose_ref_cache(refs),
     -					      prefix, 1);
    -+					      prefix, repo, 1);
    ++					      prefix, ref_store->repo, 1);
      
      	/*
      	 * The packed-refs file might contain broken references, for
 4:  da0c9c2d44 <  -:  ---------- refs: teach refs_for_each_ref() arbitrary repos
 5:  dd70820d66 =  4:  e4a1be22c8 merge-{ort,recursive}: remove add_submodule_odb()
 6:  9c5ce004b2 =  5:  0200f1880b object-file: only register submodule ODB if needed
 7:  1fca3b1a25 !  6:  7a6a1ee5f9 submodule: pass repo to check_has_commit()
    @@ Commit message
     
         Pass the repo explicitly when calling check_has_commit() to avoid
         relying on add_submodule_odb(). With this commit and the parent commit,
    -    several tests no longer rely on add_submodule_odb(), so mark these tests
    -    accordingly.
    +    the last remaining tests no longer rely on add_submodule_odb(), so mark
    +    these tests accordingly.
     
         Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
     
    @@ t/t5526-fetch-submodules.sh: test_description='Recursive "git fetch" for submodu
      
      pwd=$(pwd)
     
    + ## t/t5531-deep-submodule-push.sh ##
    +@@ t/t5531-deep-submodule-push.sh: test_description='test push with submodules'
    + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
    + export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
    + 
    ++GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB=1
    ++export GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB
    ++
    + . ./test-lib.sh
    + 
    + test_expect_success setup '
    +
    + ## t/t5545-push-options.sh ##
    +@@ t/t5545-push-options.sh: test_description='pushing to a repository using push options'
    + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
    + export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
    + 
    ++GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB=1
    ++export GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB
    ++
    + . ./test-lib.sh
    + 
    + mk_repo_pair () {
    +
      ## t/t5572-pull-submodule.sh ##
     @@
      
 8:  7b5087a14d <  -:  ---------- refs: change refs_for_each_ref_in() to take repo
 9:  cef2a97840 =  7:  e4b6ee2186 submodule: trace adding submodule ODB as alternate