Merge branch 'ds/commit-graph-with-grafts' into maint
[git/git.git] / commit-graph.c
index 8a1bec7..7cfa779 100644 (file)
@@ -13,6 +13,8 @@
 #include "commit-graph.h"
 #include "object-store.h"
 #include "alloc.h"
+#include "hashmap.h"
+#include "replace-object.h"
 
 #define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
 #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
@@ -56,6 +58,28 @@ static struct commit_graph *alloc_commit_graph(void)
        return g;
 }
 
+extern int read_replace_refs;
+
+static int commit_graph_compatible(struct repository *r)
+{
+       if (!r->gitdir)
+               return 0;
+
+       if (read_replace_refs) {
+               prepare_replace_object(r);
+               if (hashmap_get_size(&r->objects->replace_map->map))
+                       return 0;
+       }
+
+       prepare_commit_graft(r);
+       if (r->parsed_objects && r->parsed_objects->grafts_nr)
+               return 0;
+       if (is_repository_shallow(r))
+               return 0;
+
+       return 1;
+}
+
 struct commit_graph *load_commit_graph_one(const char *graph_file)
 {
        void *graph_map;
@@ -223,6 +247,9 @@ static int prepare_commit_graph(struct repository *r)
                 */
                return 0;
 
+       if (!commit_graph_compatible(r))
+               return 0;
+
        obj_dir = r->objects->objectdir;
        prepare_commit_graph_one(r, obj_dir);
        prepare_alt_odb(r);
@@ -233,10 +260,10 @@ static int prepare_commit_graph(struct repository *r)
        return !!r->objects->commit_graph;
 }
 
-static void close_commit_graph(void)
+void close_commit_graph(struct repository *r)
 {
-       free_commit_graph(the_repository->objects->commit_graph);
-       the_repository->objects->commit_graph = NULL;
+       free_commit_graph(r->objects->commit_graph);
+       r->objects->commit_graph = NULL;
 }
 
 static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos)
@@ -693,6 +720,9 @@ void write_commit_graph(const char *obj_dir,
        int num_extra_edges;
        struct commit_list *parent;
 
+       if (!commit_graph_compatible(the_repository))
+               return;
+
        oids.nr = 0;
        oids.alloc = approximate_object_count() / 4;
 
@@ -845,7 +875,7 @@ void write_commit_graph(const char *obj_dir,
        write_graph_chunk_data(f, GRAPH_OID_LEN, commits.list, commits.nr);
        write_graph_chunk_large_edges(f, commits.list, commits.nr);
 
-       close_commit_graph();
+       close_commit_graph(the_repository);
        finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC);
        commit_lock_file(&lk);