match-trees: compute buffer offset correctly when splicing

diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 78fc67b03aad7ede3e796d61a52fc4a194270c76..9e283482efcfa6de0376cc9306061cea149b12df 100644 (file)
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -38,6 +38,7 @@ static int use_done_feature;
 static int no_data;
 static int full_tree;
 static int reference_excluded_commits;
+static int show_original_ids;
 static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
 static struct string_list tag_refs = STRING_LIST_INIT_NODUP;
 static struct refspec refspecs = REFSPEC_INIT_FETCH;
@@ -271,7 +272,10 @@ static void export_blob(const struct object_id *oid)
 
        mark_next_object(object);
 
-       printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
+       printf("blob\nmark :%"PRIu32"\n", last_idnum);
+       if (show_original_ids)
+               printf("original-oid %s\n", oid_to_hex(oid));
+       printf("data %"PRIuMAX"\n", (uintmax_t)size);
        if (size && fwrite(buf, size, 1, stdout) != 1)
                die_errno("could not write blob '%s'", oid_to_hex(oid));
        printf("\n");
@@ -635,8 +639,10 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
                reencoded = reencode_string(message, "UTF-8", encoding);
        if (!commit->parents)
                printf("reset %s\n", refname);
-       printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
-              refname, last_idnum,
+       printf("commit %s\nmark :%"PRIu32"\n", refname, last_idnum);
+       if (show_original_ids)
+               printf("original-oid %s\n", oid_to_hex(&commit->object.oid));
+       printf("%.*s\n%.*s\ndata %u\n%s",
               (int)(author_end - author), author,
               (int)(committer_end - committer), committer,
               (unsigned)(reencoded
@@ -814,8 +820,10 @@ static void handle_tag(const char *name, struct tag *tag)
 
        if (starts_with(name, "refs/tags/"))
                name += 10;
-       printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
-              name, tagged_mark,
+       printf("tag %s\nfrom :%d\n", name, tagged_mark);
+       if (show_original_ids)
+               printf("original-oid %s\n", oid_to_hex(&tag->object.oid));
+       printf("%.*s%sdata %d\n%.*s\n",
               (int)(tagger_end - tagger), tagger,
               tagger == tagger_end ? "" : "\n",
               (int)message_size, (int)message_size, message ? message : "");
@@ -1096,6 +1104,8 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
                OPT_BOOL(0, "anonymize", &anonymize, N_("anonymize output")),
                OPT_BOOL(0, "reference-excluded-parents",
                         &reference_excluded_commits, N_("Reference parents which are not in fast-export stream by object id")),
+               OPT_BOOL(0, "show-original-ids", &show_original_ids,
+                           N_("Show original object ids of blobs/commits")),
 
                OPT_END()
        };