Start preparing for 1.5.4.4
[git] / builtin-mv.c
1 /*
2  * "git mv" builtin command
3  *
4  * Copyright (C) 2006 Johannes Schindelin
5  */
6 #include "cache.h"
7 #include "builtin.h"
8 #include "dir.h"
9 #include "cache-tree.h"
10 #include "path-list.h"
11 #include "parse-options.h"
12
13 static const char * const builtin_mv_usage[] = {
14         "git-mv [options] <source>... <destination>",
15         NULL
16 };
17
18 static const char **copy_pathspec(const char *prefix, const char **pathspec,
19                                   int count, int base_name)
20 {
21         int i;
22         const char **result = xmalloc((count + 1) * sizeof(const char *));
23         memcpy(result, pathspec, count * sizeof(const char *));
24         result[count] = NULL;
25         for (i = 0; i < count; i++) {
26                 int length = strlen(result[i]);
27                 if (length > 0 && result[i][length - 1] == '/') {
28                         result[i] = xmemdupz(result[i], length - 1);
29                 }
30                 if (base_name) {
31                         const char *last_slash = strrchr(result[i], '/');
32                         if (last_slash)
33                                 result[i] = last_slash + 1;
34                 }
35         }
36         return get_pathspec(prefix, result);
37 }
38
39 static void show_list(const char *label, struct path_list *list)
40 {
41         if (list->nr > 0) {
42                 int i;
43                 printf("%s", label);
44                 for (i = 0; i < list->nr; i++)
45                         printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
46                 putchar('\n');
47         }
48 }
49
50 static const char *add_slash(const char *path)
51 {
52         int len = strlen(path);
53         if (path[len - 1] != '/') {
54                 char *with_slash = xmalloc(len + 2);
55                 memcpy(with_slash, path, len);
56                 with_slash[len++] = '/';
57                 with_slash[len] = 0;
58                 return with_slash;
59         }
60         return path;
61 }
62
63 static struct lock_file lock_file;
64
65 int cmd_mv(int argc, const char **argv, const char *prefix)
66 {
67         int i, newfd;
68         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
69         struct option builtin_mv_options[] = {
70                 OPT__DRY_RUN(&show_only),
71                 OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"),
72                 OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
73                 OPT_END(),
74         };
75         const char **source, **destination, **dest_path;
76         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
77         struct stat st;
78         struct path_list overwritten = {NULL, 0, 0, 0};
79         struct path_list src_for_dst = {NULL, 0, 0, 0};
80         struct path_list added = {NULL, 0, 0, 0};
81         struct path_list deleted = {NULL, 0, 0, 0};
82         struct path_list changed = {NULL, 0, 0, 0};
83
84         git_config(git_default_config);
85
86         newfd = hold_locked_index(&lock_file, 1);
87         if (read_cache() < 0)
88                 die("index file corrupt");
89
90         argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0);
91         if (--argc < 1)
92                 usage_with_options(builtin_mv_usage, builtin_mv_options);
93
94         source = copy_pathspec(prefix, argv, argc, 0);
95         modes = xcalloc(argc, sizeof(enum update_mode));
96         dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
97
98         if (dest_path[0][0] == '\0')
99                 /* special case: "." was normalized to "" */
100                 destination = copy_pathspec(dest_path[0], argv, argc, 1);
101         else if (!lstat(dest_path[0], &st) &&
102                         S_ISDIR(st.st_mode)) {
103                 dest_path[0] = add_slash(dest_path[0]);
104                 destination = copy_pathspec(dest_path[0], argv, argc, 1);
105         } else {
106                 if (argc != 1)
107                         usage_with_options(builtin_mv_usage, builtin_mv_options);
108                 destination = dest_path;
109         }
110
111         /* Checking */
112         for (i = 0; i < argc; i++) {
113                 const char *src = source[i], *dst = destination[i];
114                 int length, src_is_dir;
115                 const char *bad = NULL;
116
117                 if (show_only)
118                         printf("Checking rename of '%s' to '%s'\n", src, dst);
119
120                 length = strlen(src);
121                 if (lstat(src, &st) < 0)
122                         bad = "bad source";
123                 else if (!strncmp(src, dst, length) &&
124                                 (dst[length] == 0 || dst[length] == '/')) {
125                         bad = "can not move directory into itself";
126                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
127                                 && lstat(dst, &st) == 0)
128                         bad = "cannot move directory over file";
129                 else if (src_is_dir) {
130                         const char *src_w_slash = add_slash(src);
131                         int len_w_slash = length + 1;
132                         int first, last;
133
134                         modes[i] = WORKING_DIRECTORY;
135
136                         first = cache_name_pos(src_w_slash, len_w_slash);
137                         if (first >= 0)
138                                 die ("Huh? %.*s is in index?",
139                                                 len_w_slash, src_w_slash);
140
141                         first = -1 - first;
142                         for (last = first; last < active_nr; last++) {
143                                 const char *path = active_cache[last]->name;
144                                 if (strncmp(path, src_w_slash, len_w_slash))
145                                         break;
146                         }
147                         free((char *)src_w_slash);
148
149                         if (last - first < 1)
150                                 bad = "source directory is empty";
151                         else {
152                                 int j, dst_len;
153
154                                 if (last - first > 0) {
155                                         source = xrealloc(source,
156                                                         (argc + last - first)
157                                                         * sizeof(char *));
158                                         destination = xrealloc(destination,
159                                                         (argc + last - first)
160                                                         * sizeof(char *));
161                                         modes = xrealloc(modes,
162                                                         (argc + last - first)
163                                                         * sizeof(enum update_mode));
164                                 }
165
166                                 dst = add_slash(dst);
167                                 dst_len = strlen(dst) - 1;
168
169                                 for (j = 0; j < last - first; j++) {
170                                         const char *path =
171                                                 active_cache[first + j]->name;
172                                         source[argc + j] = path;
173                                         destination[argc + j] =
174                                                 prefix_path(dst, dst_len,
175                                                         path + length);
176                                         modes[argc + j] = INDEX;
177                                 }
178                                 argc += last - first;
179                         }
180                 } else if (lstat(dst, &st) == 0) {
181                         bad = "destination exists";
182                         if (force) {
183                                 /*
184                                  * only files can overwrite each other:
185                                  * check both source and destination
186                                  */
187                                 if (S_ISREG(st.st_mode)) {
188                                         fprintf(stderr, "Warning: %s;"
189                                                         " will overwrite!\n",
190                                                         bad);
191                                         bad = NULL;
192                                         path_list_insert(dst, &overwritten);
193                                 } else
194                                         bad = "Cannot overwrite";
195                         }
196                 } else if (cache_name_pos(src, length) < 0)
197                         bad = "not under version control";
198                 else if (path_list_has_path(&src_for_dst, dst))
199                         bad = "multiple sources for the same target";
200                 else
201                         path_list_insert(dst, &src_for_dst);
202
203                 if (bad) {
204                         if (ignore_errors) {
205                                 if (--argc > 0) {
206                                         memmove(source + i, source + i + 1,
207                                                 (argc - i) * sizeof(char *));
208                                         memmove(destination + i,
209                                                 destination + i + 1,
210                                                 (argc - i) * sizeof(char *));
211                                 }
212                         } else
213                                 die ("%s, source=%s, destination=%s",
214                                      bad, src, dst);
215                 }
216         }
217
218         for (i = 0; i < argc; i++) {
219                 const char *src = source[i], *dst = destination[i];
220                 enum update_mode mode = modes[i];
221                 if (show_only || verbose)
222                         printf("Renaming %s to %s\n", src, dst);
223                 if (!show_only && mode != INDEX &&
224                                 rename(src, dst) < 0 && !ignore_errors)
225                         die ("renaming %s failed: %s", src, strerror(errno));
226
227                 if (mode == WORKING_DIRECTORY)
228                         continue;
229
230                 if (cache_name_pos(src, strlen(src)) >= 0) {
231                         path_list_insert(src, &deleted);
232
233                         /* destination can be a directory with 1 file inside */
234                         if (path_list_has_path(&overwritten, dst))
235                                 path_list_insert(dst, &changed);
236                         else
237                                 path_list_insert(dst, &added);
238                 } else
239                         path_list_insert(dst, &added);
240         }
241
242         if (show_only) {
243                 show_list("Changed  : ", &changed);
244                 show_list("Adding   : ", &added);
245                 show_list("Deleting : ", &deleted);
246         } else {
247                 for (i = 0; i < changed.nr; i++) {
248                         const char *path = changed.items[i].path;
249                         int j = cache_name_pos(path, strlen(path));
250                         struct cache_entry *ce = active_cache[j];
251
252                         if (j < 0)
253                                 die ("Huh? Cache entry for %s unknown?", path);
254                         refresh_cache_entry(ce, 0);
255                 }
256
257                 for (i = 0; i < added.nr; i++) {
258                         const char *path = added.items[i].path;
259                         add_file_to_cache(path, verbose);
260                 }
261
262                 for (i = 0; i < deleted.nr; i++)
263                         remove_file_from_cache(deleted.items[i].path);
264
265                 if (active_cache_changed) {
266                         if (write_cache(newfd, active_cache, active_nr) ||
267                             commit_locked_index(&lock_file))
268                                 die("Unable to write new index file");
269                 }
270         }
271
272         return 0;
273 }