t/lib-diff-alternative: abstract away SHA-1-specific constants

diff --git a/commit-graph.c b/commit-graph.c
index a59d1e387bea6ae1004eea0c5fe72a4a0b809d7e..3fc1e0da2768d3f209da08b6b4c71df133a3ec88 100644 (file)
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -9,6 +9,7 @@
 #include "revision.h"
 #include "sha1-lookup.h"
 #include "commit-graph.h"
+#include "object-store.h"
 
 #define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
 #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
@@ -206,8 +207,10 @@ static void prepare_commit_graph(void)
 
        obj_dir = get_object_directory();
        prepare_commit_graph_one(obj_dir);
-       prepare_alt_odb();
-       for (alt = alt_odb_list; !commit_graph && alt; alt = alt->next)
+       prepare_alt_odb(the_repository);
+       for (alt = the_repository->objects->alt_odb_list;
+            !commit_graph && alt;
+            alt = alt->next)
                prepare_commit_graph_one(alt->path);
 }
 
@@ -553,7 +556,8 @@ void write_commit_graph(const char *obj_dir,
                        const char **pack_indexes,
                        int nr_packs,
                        const char **commit_hex,
-                       int nr_commits)
+                       int nr_commits,
+                       int append)
 {
        struct packed_oid_list oids;
        struct packed_commit_list commits;
@@ -571,10 +575,24 @@ void write_commit_graph(const char *obj_dir,
        oids.nr = 0;
        oids.alloc = approximate_object_count() / 4;
 
+       if (append) {
+               prepare_commit_graph_one(obj_dir);
+               if (commit_graph)
+                       oids.alloc += commit_graph->num_commits;
+       }
+
        if (oids.alloc < 1024)
                oids.alloc = 1024;
        ALLOC_ARRAY(oids.list, oids.alloc);
 
+       if (append && commit_graph) {
+               for (i = 0; i < commit_graph->num_commits; i++) {
+                       const unsigned char *hash = commit_graph->chunk_oid_lookup +
+                               commit_graph->hash_len * i;
+                       hashcpy(oids.list[oids.nr++].hash, hash);
+               }
+       }
+
        if (pack_indexes) {
                struct strbuf packname = STRBUF_INIT;
                int dirlen;