mv: check if <destination> is a SKIP_WORKTREE_DIR

Originally, <destination> is assumed to be in the working tree. If it is not found as a directory, then it is determined to be either a regular file path, or error out if used under the second form (move into a directory) of 'git-mv'. Such behavior is not ideal, mainly because Git does not look into the index for <destination>, which could potentially be a SKIP_WORKTREE_DIR, which we need to determine for the later "moving from in-cone to out-of-cone" patch. Change the logic so that Git first check if <destination> is a directory with all its contents sparsified (a SKIP_WORKTREE_DIR). If <destination> is such a sparse directory, then we should modify the index the same way as we would if this were a non-sparse directory. We must be careful to ensure that the <destination> is marked with SKIP_WORKTREE_DIR. Also add a `dst_w_slash` to reuse the result from `add_slash()`, which was everywhere and can be simplified. Helped-by: Derrick Stolee <derrickstolee@github.com> Helped-by: Victoria Dye <vdye@github.com> Signed-off-by: Shaoxuan Yuan <shaoxuan.yuan02@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Shaoxuan Yuan committed Aug 9, 2022 at 20:09 UTC c08830de41f15a8ee85cf7926266e1db732ec773
1 file changed +14 -4
builtin/mv.c
+14 -4
@@ -171,6 +171,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
171 OPT_END(),
172 };
173 const char **source, **destination, **dest_path, **submodule_gitfile;
174 + const char *dst_w_slash;
175 enum update_mode *modes;
176 struct stat st;
177 struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
@@ -200,6 +201,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
201 if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
202 flags = 0;
203 dest_path = internal_prefix_pathspec(prefix, argv + argc, 1, flags);
204 + dst_w_slash = add_slash(dest_path[0]);
205 submodule_gitfile = xcalloc(argc, sizeof(char *));
206
207 if (dest_path[0][0] == '\0')
@@ -207,12 +209,20 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
209 destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
210 else if (!lstat(dest_path[0], &st) &&
211 S_ISDIR(st.st_mode)) {
210 - dest_path[0] = add_slash(dest_path[0]);
211 - destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
212 + destination = internal_prefix_pathspec(dst_w_slash, argv, argc, DUP_BASENAME);
213 } else {
213 - if (argc != 1)
214 + if (!path_in_sparse_checkout(dst_w_slash, &the_index) &&
215 + empty_dir_has_sparse_contents(dst_w_slash)) {
216 + destination = internal_prefix_pathspec(dst_w_slash, argv, argc, DUP_BASENAME);
217 + } else if (argc != 1) {
218 die(_("destination '%s' is not a directory"), dest_path[0]);
215 - destination = dest_path;
219 + } else {
220 + destination = dest_path;
221 + }
222 + }
223 + if (dst_w_slash != dest_path[0]) {
224 + free((char *)dst_w_slash);
225 + dst_w_slash = NULL;
226 }
227
228 /* Checking */