Merge tag 'v2.23.0-rc0' of git://git.kernel.org/pub/scm/git/git

Git 2.23-rc0

* tag 'v2.23.0-rc0' of git://git.kernel.org/pub/scm/git/git: (420 commits)
  Git 2.23-rc0
  Merge fixes made on the 'master' front
  Flush fixes up to the third batch post 2.22.0
  The seventh batch
  git: mark cmd_rebase as requiring a worktree
  rebase: fix white-space
  xdiff: clamp function context indices in post-image
  grep: print the pcre2_jit_on value
  t6200: use test_commit_bulk
  travis-ci: build with GCC 4.8 as well
  The sixth batch
  clean: show an error message when the path is too long
  CodingGuidelines: spell out post-C89 rules
  README: fix rendering of text in angle brackets
  rm: resolving by removal is not a warning-worthy event
  transport-helper: avoid var decl in for () loop control
  stash: fix handling removed files with --keep-index
  mingw: support spawning programs containing spaces in their names
  gpg-interface: do not scan past the end of buffer
  tests: defang pager tests by explicitly disabling the log.mailmap warning
  ...

1 files changed, 34 insertions, 9 deletions

diff --git a/commit-graph.h b/commit-graph.h
index 7dfb8c896f..df9a3b20e4 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -47,15 +47,21 @@ struct commit_graph {
 	unsigned char num_chunks;
 	uint32_t num_commits;
 	struct object_id oid;
+	char *filename;
+	const char *obj_dir;
+
+	uint32_t num_commits_in_base;
+	struct commit_graph *base_graph;
 
 	const uint32_t *chunk_oid_fanout;
 	const unsigned char *chunk_oid_lookup;
 	const unsigned char *chunk_commit_data;
 	const unsigned char *chunk_extra_edges;
+	const unsigned char *chunk_base_graphs;
 };
 
 struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st);
-
+struct commit_graph *read_commit_graph_one(struct repository *r, const char *obj_dir);
 struct commit_graph *parse_commit_graph(void *graph_map, int fd,
 					size_t graph_size);
 
@@ -65,16 +71,35 @@ struct commit_graph *parse_commit_graph(void *graph_map, int fd,
  */
 int generation_numbers_enabled(struct repository *r);
 
-void write_commit_graph_reachable(const char *obj_dir, int append,
-				  int report_progress);
-void write_commit_graph(const char *obj_dir,
-			struct string_list *pack_indexes,
-			struct string_list *commit_hex,
-			int append, int report_progress);
+#define COMMIT_GRAPH_APPEND     (1 << 0)
+#define COMMIT_GRAPH_PROGRESS   (1 << 1)
+#define COMMIT_GRAPH_SPLIT      (1 << 2)
+
+struct split_commit_graph_opts {
+	int size_multiple;
+	int max_commits;
+	timestamp_t expire_time;
+};
+
+/*
+ * The write_commit_graph* methods return zero on success
+ * and a negative value on failure. Note that if the repository
+ * is not compatible with the commit-graph feature, then the
+ * methods will return 0 without writing a commit-graph.
+ */
+int write_commit_graph_reachable(const char *obj_dir, unsigned int flags,
+				 const struct split_commit_graph_opts *split_opts);
+int write_commit_graph(const char *obj_dir,
+		       struct string_list *pack_indexes,
+		       struct string_list *commit_hex,
+		       unsigned int flags,
+		       const struct split_commit_graph_opts *split_opts);
+
+#define COMMIT_GRAPH_VERIFY_SHALLOW	(1 << 0)
 
-int verify_commit_graph(struct repository *r, struct commit_graph *g);
+int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags);
 
-void close_commit_graph(struct repository *);
+void close_commit_graph(struct raw_object_store *);
 void free_commit_graph(struct commit_graph *);
 
 #endif