Merge branch 'ds/commit-graph-with-grafts'

The recently introduced commit-graph auxiliary data is incompatible
with mechanisms such as replace & grafts that "breaks" immutable
nature of the object reference relationship.  Disable optimizations
based on its use (and updating existing commit-graph) when these
incompatible features are in use in the repository.

* ds/commit-graph-with-grafts:
  commit-graph: close_commit_graph before shallow walk
  commit-graph: not compatible with uninitialized repo
  commit-graph: not compatible with grafts
  commit-graph: not compatible with replace objects
  test-repository: properly init repo
  commit-graph: update design document
  refs.c: upgrade for_each_replace_ref to be a each_repo_ref_fn callback
  refs.c: migrate internal ref iteration to pass thru repository argument

1 files changed, 41 insertions, 7 deletions

diff --git a/refs.c b/refs.c
index a7a75b4cc0..bbcac921b6 100644
--- a/refs.c
+++ b/refs.c
@@ -1394,17 +1394,50 @@ struct ref_iterator *refs_ref_iterator_begin(
  * non-zero value, stop the iteration and return that value;
  * otherwise, return 0.
  */
+static int do_for_each_repo_ref(struct repository *r, const char *prefix,
+				each_repo_ref_fn fn, int trim, int flags,
+				void *cb_data)
+{
+	struct ref_iterator *iter;
+	struct ref_store *refs = get_main_ref_store(r);
+
+	if (!refs)
+		return 0;
+
+	iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
+
+	return do_for_each_repo_ref_iterator(r, iter, fn, cb_data);
+}
+
+struct do_for_each_ref_help {
+	each_ref_fn *fn;
+	void *cb_data;
+};
+
+static int do_for_each_ref_helper(struct repository *r,
+				  const char *refname,
+				  const struct object_id *oid,
+				  int flags,
+				  void *cb_data)
+{
+	struct do_for_each_ref_help *hp = cb_data;
+
+	return hp->fn(refname, oid, flags, hp->cb_data);
+}
+
 static int do_for_each_ref(struct ref_store *refs, const char *prefix,
 			   each_ref_fn fn, int trim, int flags, void *cb_data)
 {
 	struct ref_iterator *iter;
+	struct do_for_each_ref_help hp = { fn, cb_data };
 
 	if (!refs)
 		return 0;
 
 	iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
 
-	return do_for_each_ref_iterator(iter, fn, cb_data);
+	return do_for_each_repo_ref_iterator(the_repository, iter,
+					do_for_each_ref_helper, &hp);
 }
 
 int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
@@ -1449,12 +1482,11 @@ int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix,
 	return do_for_each_ref(refs, prefix, fn, 0, flag, cb_data);
 }
 
-int for_each_replace_ref(struct repository *r, each_ref_fn fn, void *cb_data)
+int for_each_replace_ref(struct repository *r, each_repo_ref_fn fn, void *cb_data)
 {
-	return do_for_each_ref(get_main_ref_store(r),
-			       git_replace_ref_base, fn,
-			       strlen(git_replace_ref_base),
-			       DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
+	return do_for_each_repo_ref(r, git_replace_ref_base, fn,
+				    strlen(git_replace_ref_base),
+				    DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
 }
 
 int for_each_namespaced_ref(each_ref_fn fn, void *cb_data)
@@ -2033,10 +2065,12 @@ cleanup:
 int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data)
 {
 	struct ref_iterator *iter;
+	struct do_for_each_ref_help hp = { fn, cb_data };
 
 	iter = refs->be->reflog_iterator_begin(refs);
 
-	return do_for_each_ref_iterator(iter, fn, cb_data);
+	return do_for_each_repo_ref_iterator(the_repository, iter,
+					     do_for_each_ref_helper, &hp);
 }
 
 int for_each_reflog(each_ref_fn fn, void *cb_data)