Merge branch 'sf/putty-w-args'
[git] / builtin / mv.c
1 /*
2  * "git mv" builtin command
3  *
4  * Copyright (C) 2006 Johannes Schindelin
5  */
6 #include "builtin.h"
7 #include "pathspec.h"
8 #include "lockfile.h"
9 #include "dir.h"
10 #include "cache-tree.h"
11 #include "string-list.h"
12 #include "parse-options.h"
13 #include "submodule.h"
14
15 static const char * const builtin_mv_usage[] = {
16         N_("git mv [<options>] <source>... <destination>"),
17         NULL
18 };
19
20 #define DUP_BASENAME 1
21 #define KEEP_TRAILING_SLASH 2
22
23 static const char **internal_prefix_pathspec(const char *prefix,
24                                              const char **pathspec,
25                                              int count, unsigned flags)
26 {
27         int i;
28         const char **result;
29         int prefixlen = prefix ? strlen(prefix) : 0;
30         ALLOC_ARRAY(result, count + 1);
31
32         /* Create an intermediate copy of the pathspec based on the flags */
33         for (i = 0; i < count; i++) {
34                 int length = strlen(pathspec[i]);
35                 int to_copy = length;
36                 char *it;
37                 while (!(flags & KEEP_TRAILING_SLASH) &&
38                        to_copy > 0 && is_dir_sep(pathspec[i][to_copy - 1]))
39                         to_copy--;
40
41                 it = xmemdupz(pathspec[i], to_copy);
42                 if (flags & DUP_BASENAME) {
43                         result[i] = xstrdup(basename(it));
44                         free(it);
45                 } else {
46                         result[i] = it;
47                 }
48         }
49         result[count] = NULL;
50
51         /* Prefix the pathspec and free the old intermediate strings */
52         for (i = 0; i < count; i++) {
53                 const char *match = prefix_path(prefix, prefixlen, result[i]);
54                 free((char *) result[i]);
55                 result[i] = match;
56         }
57
58         return result;
59 }
60
61 static const char *add_slash(const char *path)
62 {
63         size_t len = strlen(path);
64         if (path[len - 1] != '/') {
65                 char *with_slash = xmalloc(st_add(len, 2));
66                 memcpy(with_slash, path, len);
67                 with_slash[len++] = '/';
68                 with_slash[len] = 0;
69                 return with_slash;
70         }
71         return path;
72 }
73
74 static struct lock_file lock_file;
75 #define SUBMODULE_WITH_GITDIR ((const char *)1)
76
77 static void prepare_move_submodule(const char *src, int first,
78                                    const char **submodule_gitfile)
79 {
80         struct strbuf submodule_dotgit = STRBUF_INIT;
81         if (!S_ISGITLINK(active_cache[first]->ce_mode))
82                 die(_("Directory %s is in index and no submodule?"), src);
83         if (!is_staging_gitmodules_ok())
84                 die(_("Please stage your changes to .gitmodules or stash them to proceed"));
85         strbuf_addf(&submodule_dotgit, "%s/.git", src);
86         *submodule_gitfile = read_gitfile(submodule_dotgit.buf);
87         if (*submodule_gitfile)
88                 *submodule_gitfile = xstrdup(*submodule_gitfile);
89         else
90                 *submodule_gitfile = SUBMODULE_WITH_GITDIR;
91         strbuf_release(&submodule_dotgit);
92 }
93
94 static int index_range_of_same_dir(const char *src, int length,
95                                    int *first_p, int *last_p)
96 {
97         const char *src_w_slash = add_slash(src);
98         int first, last, len_w_slash = length + 1;
99
100         first = cache_name_pos(src_w_slash, len_w_slash);
101         if (first >= 0)
102                 die(_("%.*s is in index"), len_w_slash, src_w_slash);
103
104         first = -1 - first;
105         for (last = first; last < active_nr; last++) {
106                 const char *path = active_cache[last]->name;
107                 if (strncmp(path, src_w_slash, len_w_slash))
108                         break;
109         }
110         if (src_w_slash != src)
111                 free((char *)src_w_slash);
112         *first_p = first;
113         *last_p = last;
114         return last - first;
115 }
116
117 int cmd_mv(int argc, const char **argv, const char *prefix)
118 {
119         int i, flags, gitmodules_modified = 0;
120         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
121         struct option builtin_mv_options[] = {
122                 OPT__VERBOSE(&verbose, N_("be verbose")),
123                 OPT__DRY_RUN(&show_only, N_("dry run")),
124                 OPT__FORCE(&force, N_("force move/rename even if target exists")),
125                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
126                 OPT_END(),
127         };
128         const char **source, **destination, **dest_path, **submodule_gitfile;
129         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
130         struct stat st;
131         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
132
133         gitmodules_config();
134         git_config(git_default_config, NULL);
135
136         argc = parse_options(argc, argv, prefix, builtin_mv_options,
137                              builtin_mv_usage, 0);
138         if (--argc < 1)
139                 usage_with_options(builtin_mv_usage, builtin_mv_options);
140
141         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
142         if (read_cache() < 0)
143                 die(_("index file corrupt"));
144
145         source = internal_prefix_pathspec(prefix, argv, argc, 0);
146         modes = xcalloc(argc, sizeof(enum update_mode));
147         /*
148          * Keep trailing slash, needed to let
149          * "git mv file no-such-dir/" error out, except in the case
150          * "git mv directory no-such-dir/".
151          */
152         flags = KEEP_TRAILING_SLASH;
153         if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
154                 flags = 0;
155         dest_path = internal_prefix_pathspec(prefix, argv + argc, 1, flags);
156         submodule_gitfile = xcalloc(argc, sizeof(char *));
157
158         if (dest_path[0][0] == '\0')
159                 /* special case: "." was normalized to "" */
160                 destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
161         else if (!lstat(dest_path[0], &st) &&
162                         S_ISDIR(st.st_mode)) {
163                 dest_path[0] = add_slash(dest_path[0]);
164                 destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
165         } else {
166                 if (argc != 1)
167                         die(_("destination '%s' is not a directory"), dest_path[0]);
168                 destination = dest_path;
169         }
170
171         /* Checking */
172         for (i = 0; i < argc; i++) {
173                 const char *src = source[i], *dst = destination[i];
174                 int length, src_is_dir;
175                 const char *bad = NULL;
176
177                 if (show_only)
178                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
179
180                 length = strlen(src);
181                 if (lstat(src, &st) < 0)
182                         bad = _("bad source");
183                 else if (!strncmp(src, dst, length) &&
184                                 (dst[length] == 0 || dst[length] == '/')) {
185                         bad = _("can not move directory into itself");
186                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
187                                 && lstat(dst, &st) == 0)
188                         bad = _("cannot move directory over file");
189                 else if (src_is_dir) {
190                         int first = cache_name_pos(src, length), last;
191
192                         if (first >= 0)
193                                 prepare_move_submodule(src, first,
194                                                        submodule_gitfile + i);
195                         else if (index_range_of_same_dir(src, length,
196                                                          &first, &last) < 1)
197                                 bad = _("source directory is empty");
198                         else { /* last - first >= 1 */
199                                 int j, dst_len, n;
200
201                                 modes[i] = WORKING_DIRECTORY;
202                                 n = argc + last - first;
203                                 REALLOC_ARRAY(source, n);
204                                 REALLOC_ARRAY(destination, n);
205                                 REALLOC_ARRAY(modes, n);
206                                 REALLOC_ARRAY(submodule_gitfile, n);
207
208                                 dst = add_slash(dst);
209                                 dst_len = strlen(dst);
210
211                                 for (j = 0; j < last - first; j++) {
212                                         const char *path = active_cache[first + j]->name;
213                                         source[argc + j] = path;
214                                         destination[argc + j] =
215                                                 prefix_path(dst, dst_len, path + length + 1);
216                                         modes[argc + j] = INDEX;
217                                         submodule_gitfile[argc + j] = NULL;
218                                 }
219                                 argc += last - first;
220                         }
221                 } else if (cache_name_pos(src, length) < 0)
222                         bad = _("not under version control");
223                 else if (lstat(dst, &st) == 0 &&
224                          (!ignore_case || strcasecmp(src, dst))) {
225                         bad = _("destination exists");
226                         if (force) {
227                                 /*
228                                  * only files can overwrite each other:
229                                  * check both source and destination
230                                  */
231                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
232                                         if (verbose)
233                                                 warning(_("overwriting '%s'"), dst);
234                                         bad = NULL;
235                                 } else
236                                         bad = _("Cannot overwrite");
237                         }
238                 } else if (string_list_has_string(&src_for_dst, dst))
239                         bad = _("multiple sources for the same target");
240                 else if (is_dir_sep(dst[strlen(dst) - 1]))
241                         bad = _("destination directory does not exist");
242                 else
243                         string_list_insert(&src_for_dst, dst);
244
245                 if (!bad)
246                         continue;
247                 if (!ignore_errors)
248                         die(_("%s, source=%s, destination=%s"),
249                              bad, src, dst);
250                 if (--argc > 0) {
251                         int n = argc - i;
252                         memmove(source + i, source + i + 1,
253                                 n * sizeof(char *));
254                         memmove(destination + i, destination + i + 1,
255                                 n * sizeof(char *));
256                         memmove(modes + i, modes + i + 1,
257                                 n * sizeof(enum update_mode));
258                         memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
259                                 n * sizeof(char *));
260                         i--;
261                 }
262         }
263
264         for (i = 0; i < argc; i++) {
265                 const char *src = source[i], *dst = destination[i];
266                 enum update_mode mode = modes[i];
267                 int pos;
268                 if (show_only || verbose)
269                         printf(_("Renaming %s to %s\n"), src, dst);
270                 if (show_only)
271                         continue;
272                 if (mode != INDEX && rename(src, dst) < 0) {
273                         if (ignore_errors)
274                                 continue;
275                         die_errno(_("renaming '%s' failed"), src);
276                 }
277                 if (submodule_gitfile[i]) {
278                         if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
279                                 connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
280                         if (!update_path_in_gitmodules(src, dst))
281                                 gitmodules_modified = 1;
282                 }
283
284                 if (mode == WORKING_DIRECTORY)
285                         continue;
286
287                 pos = cache_name_pos(src, strlen(src));
288                 assert(pos >= 0);
289                 if (!show_only)
290                         rename_cache_entry_at(pos, dst);
291         }
292
293         if (gitmodules_modified)
294                 stage_updated_gitmodules();
295
296         if (active_cache_changed &&
297             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
298                 die(_("Unable to write new index file"));
299
300         return 0;
301 }