Merge branch 'jc/format-patch'
[git] / builtin-mv.c
1 /*
2  * "git mv" builtin command
3  *
4  * Copyright (C) 2006 Johannes Schindelin
5  */
6 #include <fnmatch.h>
7
8 #include "cache.h"
9 #include "builtin.h"
10 #include "dir.h"
11 #include "cache-tree.h"
12 #include "path-list.h"
13
14 static const char builtin_mv_usage[] =
15 "git-mv [-n] [-f] (<source> <destination> | [-k] <source>... <destination>)";
16
17 static const char **copy_pathspec(const char *prefix, const char **pathspec,
18                                   int count, int base_name)
19 {
20         int i;
21         const char **result = xmalloc((count + 1) * sizeof(const char *));
22         memcpy(result, pathspec, count * sizeof(const char *));
23         result[count] = NULL;
24         for (i = 0; i < count; i++) {
25                 int length = strlen(result[i]);
26                 if (length > 0 && result[i][length - 1] == '/') {
27                         char *without_slash = xmalloc(length);
28                         memcpy(without_slash, result[i], length - 1);
29                         without_slash[length] = '\0';
30                         result[i] = without_slash;
31                 }
32                 if (base_name) {
33                         const char *last_slash = strrchr(result[i], '/');
34                         if (last_slash)
35                                 result[i] = last_slash + 1;
36                 }
37         }
38         return get_pathspec(prefix, result);
39 }
40
41 static void show_list(const char *label, struct path_list *list)
42 {
43         if (list->nr > 0) {
44                 int i;
45                 printf("%s", label);
46                 for (i = 0; i < list->nr; i++)
47                         printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
48                 putchar('\n');
49         }
50 }
51
52 static const char *add_slash(const char *path)
53 {
54         int len = strlen(path);
55         if (path[len - 1] != '/') {
56                 char *with_slash = xmalloc(len + 2);
57                 memcpy(with_slash, path, len);
58                 with_slash[len++] = '/';
59                 with_slash[len] = 0;
60                 return with_slash;
61         }
62         return path;
63 }
64
65 static struct lock_file lock_file;
66
67 int cmd_mv(int argc, const char **argv, const char *prefix)
68 {
69         int i, newfd, count;
70         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
71         const char **source, **destination, **dest_path;
72         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
73         struct stat st;
74         struct path_list overwritten = {NULL, 0, 0, 0};
75         struct path_list src_for_dst = {NULL, 0, 0, 0};
76         struct path_list added = {NULL, 0, 0, 0};
77         struct path_list deleted = {NULL, 0, 0, 0};
78         struct path_list changed = {NULL, 0, 0, 0};
79
80         git_config(git_default_config);
81
82         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
83         if (read_cache() < 0)
84                 die("index file corrupt");
85
86         for (i = 1; i < argc; i++) {
87                 const char *arg = argv[i];
88
89                 if (arg[0] != '-')
90                         break;
91                 if (!strcmp(arg, "--")) {
92                         i++;
93                         break;
94                 }
95                 if (!strcmp(arg, "-n")) {
96                         show_only = 1;
97                         continue;
98                 }
99                 if (!strcmp(arg, "-f")) {
100                         force = 1;
101                         continue;
102                 }
103                 if (!strcmp(arg, "-k")) {
104                         ignore_errors = 1;
105                         continue;
106                 }
107                 usage(builtin_mv_usage);
108         }
109         count = argc - i - 1;
110         if (count < 1)
111                 usage(builtin_mv_usage);
112
113         source = copy_pathspec(prefix, argv + i, count, 0);
114         modes = xcalloc(count, sizeof(enum update_mode));
115         dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
116
117         if (!lstat(dest_path[0], &st) &&
118                         S_ISDIR(st.st_mode)) {
119                 dest_path[0] = add_slash(dest_path[0]);
120                 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
121         } else {
122                 if (count != 1)
123                         usage(builtin_mv_usage);
124                 destination = dest_path;
125         }
126
127         /* Checking */
128         for (i = 0; i < count; i++) {
129                 int length;
130                 const char *bad = NULL;
131
132                 if (show_only)
133                         printf("Checking rename of '%s' to '%s'\n",
134                                 source[i], destination[i]);
135
136                 if (lstat(source[i], &st) < 0)
137                         bad = "bad source";
138
139                 if (!bad &&
140                     (length = strlen(source[i])) >= 0 &&
141                     !strncmp(destination[i], source[i], length) &&
142                     (destination[i][length] == 0 || destination[i][length] == '/'))
143                         bad = "can not move directory into itself";
144
145                 if (S_ISDIR(st.st_mode)) {
146                         const char *dir = source[i], *dest_dir = destination[i];
147                         int first, last, len = strlen(dir);
148
149                         if (lstat(dest_dir, &st) == 0) {
150                                 bad = "cannot move directory over file";
151                                 goto next;
152                         }
153
154                         modes[i] = WORKING_DIRECTORY;
155
156                         first = cache_name_pos(source[i], len);
157                         if (first >= 0)
158                                 die ("Huh? %s/ is in index?", dir);
159
160                         first = -1 - first;
161                         for (last = first; last < active_nr; last++) {
162                                 const char *path = active_cache[last]->name;
163                                 if (strncmp(path, dir, len) || path[len] != '/')
164                                         break;
165                         }
166
167                         if (last - first < 1)
168                                 bad = "source directory is empty";
169                         else if (!bad) {
170                                 int j, dst_len = strlen(dest_dir);
171
172                                 if (last - first > 0) {
173                                         source = realloc(source,
174                                                         (count + last - first)
175                                                         * sizeof(char *));
176                                         destination = realloc(destination,
177                                                         (count + last - first)
178                                                         * sizeof(char *));
179                                         modes = realloc(modes,
180                                                         (count + last - first)
181                                                         * sizeof(enum update_mode));
182                                 }
183
184                                 dest_dir = add_slash(dest_dir);
185
186                                 for (j = 0; j < last - first; j++) {
187                                         const char *path =
188                                                 active_cache[first + j]->name;
189                                         source[count + j] = path;
190                                         destination[count + j] =
191                                                 prefix_path(dest_dir, dst_len,
192                                                         path + len);
193                                         modes[count + j] = INDEX;
194                                 }
195                                 count += last - first;
196                         }
197
198                         goto next;
199                 }
200
201                 if (!bad && lstat(destination[i], &st) == 0) {
202                         bad = "destination exists";
203                         if (force) {
204                                 /*
205                                  * only files can overwrite each other:
206                                  * check both source and destination
207                                  */
208                                 if (S_ISREG(st.st_mode)) {
209                                         fprintf(stderr, "Warning: %s;"
210                                                         " will overwrite!\n",
211                                                         bad);
212                                         bad = NULL;
213                                         path_list_insert(destination[i],
214                                                         &overwritten);
215                                 } else
216                                         bad = "Cannot overwrite";
217                         }
218                 }
219
220                 if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
221                         bad = "not under version control";
222
223                 if (!bad) {
224                         if (path_list_has_path(&src_for_dst, destination[i]))
225                                 bad = "multiple sources for the same target";
226                         else
227                                 path_list_insert(destination[i], &src_for_dst);
228                 }
229
230 next:
231                 if (bad) {
232                         if (ignore_errors) {
233                                 if (--count > 0) {
234                                         memmove(source + i, source + i + 1,
235                                                 (count - i) * sizeof(char *));
236                                         memmove(destination + i,
237                                                 destination + i + 1,
238                                                 (count - i) * sizeof(char *));
239                                 }
240                         } else
241                                 die ("%s, source=%s, destination=%s",
242                                      bad, source[i], destination[i]);
243                 }
244         }
245
246         for (i = 0; i < count; i++) {
247                 if (show_only || verbose)
248                         printf("Renaming %s to %s\n",
249                                source[i], destination[i]);
250                 if (!show_only && modes[i] != INDEX &&
251                     rename(source[i], destination[i]) < 0 &&
252                     !ignore_errors)
253                         die ("renaming %s failed: %s",
254                              source[i], strerror(errno));
255
256                 if (modes[i] == WORKING_DIRECTORY)
257                         continue;
258
259                 if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
260                         path_list_insert(source[i], &deleted);
261
262                         /* destination can be a directory with 1 file inside */
263                         if (path_list_has_path(&overwritten, destination[i]))
264                                 path_list_insert(destination[i], &changed);
265                         else
266                                 path_list_insert(destination[i], &added);
267                 } else
268                         path_list_insert(destination[i], &added);
269         }
270
271         if (show_only) {
272                 show_list("Changed  : ", &changed);
273                 show_list("Adding   : ", &added);
274                 show_list("Deleting : ", &deleted);
275         } else {
276                 for (i = 0; i < changed.nr; i++) {
277                         const char *path = changed.items[i].path;
278                         int i = cache_name_pos(path, strlen(path));
279                         struct cache_entry *ce = active_cache[i];
280
281                         if (i < 0)
282                                 die ("Huh? Cache entry for %s unknown?", path);
283                         refresh_cache_entry(ce, 0);
284                 }
285
286                 for (i = 0; i < added.nr; i++) {
287                         const char *path = added.items[i].path;
288                         add_file_to_index(path, verbose);
289                 }
290
291                 for (i = 0; i < deleted.nr; i++) {
292                         const char *path = deleted.items[i].path;
293                         remove_file_from_cache(path);
294                 }
295
296                 if (active_cache_changed) {
297                         if (write_cache(newfd, active_cache, active_nr) ||
298                             close(newfd) ||
299                             commit_lock_file(&lock_file))
300                                 die("Unable to write new index file");
301                 }
302         }
303
304         return 0;
305 }