Merge branch 'jk/common-main' into maint-2.10
[git] / builtin / mv.c
1 /*
2  * "git mv" builtin command
3  *
4  * Copyright (C) 2006 Johannes Schindelin
5  */
6 #include "builtin.h"
7 #include "lockfile.h"
8 #include "dir.h"
9 #include "cache-tree.h"
10 #include "string-list.h"
11 #include "parse-options.h"
12 #include "submodule.h"
13
14 static const char * const builtin_mv_usage[] = {
15         N_("git mv [<options>] <source>... <destination>"),
16         NULL
17 };
18
19 #define DUP_BASENAME 1
20 #define KEEP_TRAILING_SLASH 2
21
22 static const char **internal_copy_pathspec(const char *prefix,
23                                            const char **pathspec,
24                                            int count, unsigned flags)
25 {
26         int i;
27         const char **result;
28         ALLOC_ARRAY(result, count + 1);
29         COPY_ARRAY(result, pathspec, count);
30         result[count] = NULL;
31         for (i = 0; i < count; i++) {
32                 int length = strlen(result[i]);
33                 int to_copy = length;
34                 while (!(flags & KEEP_TRAILING_SLASH) &&
35                        to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
36                         to_copy--;
37                 if (to_copy != length || flags & DUP_BASENAME) {
38                         char *it = xmemdupz(result[i], to_copy);
39                         if (flags & DUP_BASENAME) {
40                                 result[i] = xstrdup(basename(it));
41                                 free(it);
42                         } else
43                                 result[i] = it;
44                 }
45         }
46         return get_pathspec(prefix, result);
47 }
48
49 static const char *add_slash(const char *path)
50 {
51         size_t len = strlen(path);
52         if (path[len - 1] != '/') {
53                 char *with_slash = xmalloc(st_add(len, 2));
54                 memcpy(with_slash, path, len);
55                 with_slash[len++] = '/';
56                 with_slash[len] = 0;
57                 return with_slash;
58         }
59         return path;
60 }
61
62 static struct lock_file lock_file;
63 #define SUBMODULE_WITH_GITDIR ((const char *)1)
64
65 static void prepare_move_submodule(const char *src, int first,
66                                    const char **submodule_gitfile)
67 {
68         struct strbuf submodule_dotgit = STRBUF_INIT;
69         if (!S_ISGITLINK(active_cache[first]->ce_mode))
70                 die(_("Directory %s is in index and no submodule?"), src);
71         if (!is_staging_gitmodules_ok())
72                 die(_("Please stage your changes to .gitmodules or stash them to proceed"));
73         strbuf_addf(&submodule_dotgit, "%s/.git", src);
74         *submodule_gitfile = read_gitfile(submodule_dotgit.buf);
75         if (*submodule_gitfile)
76                 *submodule_gitfile = xstrdup(*submodule_gitfile);
77         else
78                 *submodule_gitfile = SUBMODULE_WITH_GITDIR;
79         strbuf_release(&submodule_dotgit);
80 }
81
82 static int index_range_of_same_dir(const char *src, int length,
83                                    int *first_p, int *last_p)
84 {
85         const char *src_w_slash = add_slash(src);
86         int first, last, len_w_slash = length + 1;
87
88         first = cache_name_pos(src_w_slash, len_w_slash);
89         if (first >= 0)
90                 die(_("%.*s is in index"), len_w_slash, src_w_slash);
91
92         first = -1 - first;
93         for (last = first; last < active_nr; last++) {
94                 const char *path = active_cache[last]->name;
95                 if (strncmp(path, src_w_slash, len_w_slash))
96                         break;
97         }
98         if (src_w_slash != src)
99                 free((char *)src_w_slash);
100         *first_p = first;
101         *last_p = last;
102         return last - first;
103 }
104
105 int cmd_mv(int argc, const char **argv, const char *prefix)
106 {
107         int i, flags, gitmodules_modified = 0;
108         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
109         struct option builtin_mv_options[] = {
110                 OPT__VERBOSE(&verbose, N_("be verbose")),
111                 OPT__DRY_RUN(&show_only, N_("dry run")),
112                 OPT__FORCE(&force, N_("force move/rename even if target exists")),
113                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
114                 OPT_END(),
115         };
116         const char **source, **destination, **dest_path, **submodule_gitfile;
117         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
118         struct stat st;
119         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
120
121         gitmodules_config();
122         git_config(git_default_config, NULL);
123
124         argc = parse_options(argc, argv, prefix, builtin_mv_options,
125                              builtin_mv_usage, 0);
126         if (--argc < 1)
127                 usage_with_options(builtin_mv_usage, builtin_mv_options);
128
129         hold_locked_index(&lock_file, 1);
130         if (read_cache() < 0)
131                 die(_("index file corrupt"));
132
133         source = internal_copy_pathspec(prefix, argv, argc, 0);
134         modes = xcalloc(argc, sizeof(enum update_mode));
135         /*
136          * Keep trailing slash, needed to let
137          * "git mv file no-such-dir/" error out, except in the case
138          * "git mv directory no-such-dir/".
139          */
140         flags = KEEP_TRAILING_SLASH;
141         if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
142                 flags = 0;
143         dest_path = internal_copy_pathspec(prefix, argv + argc, 1, flags);
144         submodule_gitfile = xcalloc(argc, sizeof(char *));
145
146         if (dest_path[0][0] == '\0')
147                 /* special case: "." was normalized to "" */
148                 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
149         else if (!lstat(dest_path[0], &st) &&
150                         S_ISDIR(st.st_mode)) {
151                 dest_path[0] = add_slash(dest_path[0]);
152                 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
153         } else {
154                 if (argc != 1)
155                         die(_("destination '%s' is not a directory"), dest_path[0]);
156                 destination = dest_path;
157         }
158
159         /* Checking */
160         for (i = 0; i < argc; i++) {
161                 const char *src = source[i], *dst = destination[i];
162                 int length, src_is_dir;
163                 const char *bad = NULL;
164
165                 if (show_only)
166                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
167
168                 length = strlen(src);
169                 if (lstat(src, &st) < 0)
170                         bad = _("bad source");
171                 else if (!strncmp(src, dst, length) &&
172                                 (dst[length] == 0 || dst[length] == '/')) {
173                         bad = _("can not move directory into itself");
174                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
175                                 && lstat(dst, &st) == 0)
176                         bad = _("cannot move directory over file");
177                 else if (src_is_dir) {
178                         int first = cache_name_pos(src, length), last;
179
180                         if (first >= 0)
181                                 prepare_move_submodule(src, first,
182                                                        submodule_gitfile + i);
183                         else if (index_range_of_same_dir(src, length,
184                                                          &first, &last) < 1)
185                                 bad = _("source directory is empty");
186                         else { /* last - first >= 1 */
187                                 int j, dst_len, n;
188
189                                 modes[i] = WORKING_DIRECTORY;
190                                 n = argc + last - first;
191                                 REALLOC_ARRAY(source, n);
192                                 REALLOC_ARRAY(destination, n);
193                                 REALLOC_ARRAY(modes, n);
194                                 REALLOC_ARRAY(submodule_gitfile, n);
195
196                                 dst = add_slash(dst);
197                                 dst_len = strlen(dst);
198
199                                 for (j = 0; j < last - first; j++) {
200                                         const char *path = active_cache[first + j]->name;
201                                         source[argc + j] = path;
202                                         destination[argc + j] =
203                                                 prefix_path(dst, dst_len, path + length + 1);
204                                         modes[argc + j] = INDEX;
205                                         submodule_gitfile[argc + j] = NULL;
206                                 }
207                                 argc += last - first;
208                         }
209                 } else if (cache_name_pos(src, length) < 0)
210                         bad = _("not under version control");
211                 else if (lstat(dst, &st) == 0 &&
212                          (!ignore_case || strcasecmp(src, dst))) {
213                         bad = _("destination exists");
214                         if (force) {
215                                 /*
216                                  * only files can overwrite each other:
217                                  * check both source and destination
218                                  */
219                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
220                                         if (verbose)
221                                                 warning(_("overwriting '%s'"), dst);
222                                         bad = NULL;
223                                 } else
224                                         bad = _("Cannot overwrite");
225                         }
226                 } else if (string_list_has_string(&src_for_dst, dst))
227                         bad = _("multiple sources for the same target");
228                 else if (is_dir_sep(dst[strlen(dst) - 1]))
229                         bad = _("destination directory does not exist");
230                 else
231                         string_list_insert(&src_for_dst, dst);
232
233                 if (!bad)
234                         continue;
235                 if (!ignore_errors)
236                         die(_("%s, source=%s, destination=%s"),
237                              bad, src, dst);
238                 if (--argc > 0) {
239                         int n = argc - i;
240                         memmove(source + i, source + i + 1,
241                                 n * sizeof(char *));
242                         memmove(destination + i, destination + i + 1,
243                                 n * sizeof(char *));
244                         memmove(modes + i, modes + i + 1,
245                                 n * sizeof(enum update_mode));
246                         memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
247                                 n * sizeof(char *));
248                         i--;
249                 }
250         }
251
252         for (i = 0; i < argc; i++) {
253                 const char *src = source[i], *dst = destination[i];
254                 enum update_mode mode = modes[i];
255                 int pos;
256                 if (show_only || verbose)
257                         printf(_("Renaming %s to %s\n"), src, dst);
258                 if (show_only)
259                         continue;
260                 if (mode != INDEX && rename(src, dst) < 0) {
261                         if (ignore_errors)
262                                 continue;
263                         die_errno(_("renaming '%s' failed"), src);
264                 }
265                 if (submodule_gitfile[i]) {
266                         if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
267                                 connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
268                         if (!update_path_in_gitmodules(src, dst))
269                                 gitmodules_modified = 1;
270                 }
271
272                 if (mode == WORKING_DIRECTORY)
273                         continue;
274
275                 pos = cache_name_pos(src, strlen(src));
276                 assert(pos >= 0);
277                 if (!show_only)
278                         rename_cache_entry_at(pos, dst);
279         }
280
281         if (gitmodules_modified)
282                 stage_updated_gitmodules();
283
284         if (active_cache_changed &&
285             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
286                 die(_("Unable to write new index file"));
287
288         return 0;
289 }