Allow ':/<oneline-prefix>' syntax to work with save_commit_buffer == 0

Earlier, ':/<oneline-prefix>' would not work (i.e. die) with commands that
set save_commit_buffer = 0, such as blame, describe, pack-objects, reflog
and bundle.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_name.c b/sha1_name.c
index 2d727d54dc43c23cb2fe19369d58e57e2a020ca9..bd8fc05c4b9727ad4d14b20127012b53a9ef90ee 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -610,24 +610,35 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
 {
        struct commit_list *list = NULL, *backup = NULL, *l;
        int retval = -1;
+       char *temp_commit_buffer = NULL;
 
        if (prefix[0] == '!') {
                if (prefix[1] != '!')
                        die ("Invalid search pattern: %s", prefix);
                prefix++;
        }
-       if (!save_commit_buffer)
-               return error("Could not expand oneline-name.");
        for_each_ref(handle_one_ref, &list);
        for (l = list; l; l = l->next)
                commit_list_insert(l->item, &backup);
        while (list) {
                char *p;
                struct commit *commit;
+               enum object_type type;
+               unsigned long size;
 
                commit = pop_most_recent_commit(&list, ONELINE_SEEN);
                parse_object(commit->object.sha1);
-               if (!commit->buffer || !(p = strstr(commit->buffer, "\n\n")))
+               if (temp_commit_buffer)
+                       free(temp_commit_buffer);
+               if (commit->buffer)
+                       p = commit->buffer;
+               else {
+                       p = read_sha1_file(commit->object.sha1, &type, &size);
+                       if (!p)
+                               continue;
+                       temp_commit_buffer = p;
+               }
+               if (!(p = strstr(p, "\n\n")))
                        continue;
                if (!prefixcmp(p + 2, prefix)) {
                        hashcpy(sha1, commit->object.sha1);
@@ -635,6 +646,8 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
                        break;
                }
        }
+       if (temp_commit_buffer)
+               free(temp_commit_buffer);
        free_commit_list(list);
        for (l = backup; l; l = l->next)
                clear_commit_marks(l->item, ONELINE_SEEN);