git format-patch: avoid underrun when format.headers is empty or all NLs

[git.git] / builtin-mv.c

diff --git a/builtin-mv.c b/builtin-mv.c
index 736a0b8bb1f39c47b35cb58f6775a683c5ed9ed7..4f65b5ae9baf66953e79886fd93fe31786b24d36 100644 (file)
--- a/builtin-mv.c
+++ b/builtin-mv.c
@@ -36,18 +36,6 @@ static const char **copy_pathspec(const char *prefix, const char **pathspec,
        return get_pathspec(prefix, result);
 }
 
-static void show_list(const char *label, struct string_list *list)
-{
-       if (list->nr > 0) {
-               int i;
-               printf("%s", label);
-               for (i = 0; i < list->nr; i++)
-                       printf("%s%s", i > 0 ? ", " : "",
-                                       list->items[i].string);
-               putchar('\n');
-       }
-}
-
 static const char *add_slash(const char *path)
 {
        int len = strlen(path);
@@ -76,11 +64,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
        const char **source, **destination, **dest_path;
        enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
        struct stat st;
-       struct string_list overwritten = {NULL, 0, 0, 0};
        struct string_list src_for_dst = {NULL, 0, 0, 0};
-       struct string_list added = {NULL, 0, 0, 0};
-       struct string_list deleted = {NULL, 0, 0, 0};
-       struct string_list changed = {NULL, 0, 0, 0};
 
        git_config(git_default_config, NULL);
 
@@ -185,12 +169,11 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
                                 * only files can overwrite each other:
                                 * check both source and destination
                                 */
-                               if (S_ISREG(st.st_mode)) {
+                               if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
                                        fprintf(stderr, "Warning: %s;"
                                                        " will overwrite!\n",
                                                        bad);
                                        bad = NULL;
-                                       string_list_insert(dst, &overwritten);
                                } else
                                        bad = "Cannot overwrite";
                        }
@@ -219,6 +202,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
        for (i = 0; i < argc; i++) {
                const char *src = source[i], *dst = destination[i];
                enum update_mode mode = modes[i];
+               int pos;
                if (show_only || verbose)
                        printf("Renaming %s to %s\n", src, dst);
                if (!show_only && mode != INDEX &&
@@ -228,47 +212,16 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
                if (mode == WORKING_DIRECTORY)
                        continue;
 
-               if (cache_name_pos(src, strlen(src)) >= 0) {
-                       string_list_insert(src, &deleted);
-
-                       /* destination can be a directory with 1 file inside */
-                       if (string_list_has_string(&overwritten, dst))
-                               string_list_insert(dst, &changed);
-                       else
-                               string_list_insert(dst, &added);
-               } else
-                       string_list_insert(dst, &added);
+               pos = cache_name_pos(src, strlen(src));
+               assert(pos >= 0);
+               if (!show_only)
+                       rename_cache_entry_at(pos, dst);
        }
 
-       if (show_only) {
-               show_list("Changed  : ", &changed);
-               show_list("Adding   : ", &added);
-               show_list("Deleting : ", &deleted);
-       } else {
-               for (i = 0; i < changed.nr; i++) {
-                       const char *path = changed.items[i].string;
-                       int j = cache_name_pos(path, strlen(path));
-                       struct cache_entry *ce = active_cache[j];
-
-                       if (j < 0)
-                               die ("Huh? Cache entry for %s unknown?", path);
-                       refresh_cache_entry(ce, 0);
-               }
-
-               for (i = 0; i < added.nr; i++) {
-                       const char *path = added.items[i].string;
-                       if (add_file_to_cache(path, verbose ? ADD_CACHE_VERBOSE : 0))
-                               die("updating index entries failed");
-               }
-
-               for (i = 0; i < deleted.nr; i++)
-                       remove_file_from_cache(deleted.items[i].string);
-
-               if (active_cache_changed) {
-                       if (write_cache(newfd, active_cache, active_nr) ||
-                           commit_locked_index(&lock_file))
-                               die("Unable to write new index file");
-               }
+       if (active_cache_changed) {
+               if (write_cache(newfd, active_cache, active_nr) ||
+                   commit_locked_index(&lock_file))
+                       die("Unable to write new index file");
        }
 
        return 0;