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