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Merge branch 'ml/pager'
[git.git] / builtin-mv.c
bloba731f8d9cfed783fb59cb64db93f854ef0a4ebf9
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 const char **result = xmalloc((count + 1) * sizeof(const char *));
21 memcpy(result, pathspec, count * sizeof(const char *));
22 result[count] = NULL;
23 if (base_name) {
24 int i;
25 for (i = 0; i < count; i++) {
26 const char *last_slash = strrchr(result[i], '/');
27 if (last_slash)
28 result[i] = last_slash + 1;
29 }
30 }
31 return get_pathspec(prefix, result);
32 }
33
34 static void show_list(const char *label, struct path_list *list)
35 {
36 if (list->nr > 0) {
37 int i;
38 printf("%s", label);
39 for (i = 0; i < list->nr; i++)
40 printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
41 putchar('\n');
42 }
43 }
44
45 static const char *add_slash(const char *path)
46 {
47 int len = strlen(path);
48 if (path[len - 1] != '/') {
49 char *with_slash = xmalloc(len + 2);
50 memcpy(with_slash, path, len);
51 with_slash[len++] = '/';
52 with_slash[len] = 0;
53 return with_slash;
54 }
55 return path;
56 }
57
58 static struct lock_file lock_file;
59
60 int cmd_mv(int argc, const char **argv, const char *prefix)
61 {
62 int i, newfd, count;
63 int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
64 const char **source, **destination, **dest_path;
65 enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
66 struct stat st;
67 struct path_list overwritten = {NULL, 0, 0, 0};
68 struct path_list src_for_dst = {NULL, 0, 0, 0};
69 struct path_list added = {NULL, 0, 0, 0};
70 struct path_list deleted = {NULL, 0, 0, 0};
71 struct path_list changed = {NULL, 0, 0, 0};
72
73 git_config(git_default_config);
74
75 newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
76 if (read_cache() < 0)
77 die("index file corrupt");
78
79 for (i = 1; i < argc; i++) {
80 const char *arg = argv[i];
81
82 if (arg[0] != '-')
83 break;
84 if (!strcmp(arg, "--")) {
85 i++;
86 break;
87 }
88 if (!strcmp(arg, "-n")) {
89 show_only = 1;
90 continue;
91 }
92 if (!strcmp(arg, "-f")) {
93 force = 1;
94 continue;
95 }
96 if (!strcmp(arg, "-k")) {
97 ignore_errors = 1;
98 continue;
99 }
100 usage(builtin_mv_usage);
101 }
102 count = argc - i - 1;
103 if (count < 1)
104 usage(builtin_mv_usage);
105
106 source = copy_pathspec(prefix, argv + i, count, 0);
107 modes = xcalloc(count, sizeof(enum update_mode));
108 dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
109
110 if (!lstat(dest_path[0], &st) &&
111 S_ISDIR(st.st_mode)) {
112 dest_path[0] = add_slash(dest_path[0]);
113 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
114 } else {
115 if (count != 1)
116 usage(builtin_mv_usage);
117 destination = dest_path;
118 }
119
120 /* Checking */
121 for (i = 0; i < count; i++) {
122 const char *bad = NULL;
123
124 if (show_only)
125 printf("Checking rename of '%s' to '%s'\n",
126 source[i], destination[i]);
127
128 if (lstat(source[i], &st) < 0)
129 bad = "bad source";
130
131 if (S_ISDIR(st.st_mode)) {
132 const char *dir = source[i], *dest_dir = destination[i];
133 int first, last, len = strlen(dir);
134
135 if (lstat(dest_dir, &st) == 0) {
136 bad = "cannot move directory over file";
137 goto next;
138 }
139
140 modes[i] = WORKING_DIRECTORY;
141
142 first = cache_name_pos(source[i], len);
143 if (first >= 0)
144 die ("Huh? %s/ is in index?", dir);
145
146 first = -1 - first;
147 for (last = first; last < active_nr; last++) {
148 const char *path = active_cache[last]->name;
149 if (strncmp(path, dir, len) || path[len] != '/')
150 break;
151 }
152
153 if (last - first < 1)
154 bad = "source directory is empty";
155 else if (!bad) {
156 int j, dst_len = strlen(dest_dir);
157
158 if (last - first > 0) {
159 source = realloc(source,
160 (count + last - first)
161 * sizeof(char *));
162 destination = realloc(destination,
163 (count + last - first)
164 * sizeof(char *));
165 modes = realloc(modes,
166 (count + last - first)
167 * sizeof(enum update_mode));
168 }
169
170 dest_dir = add_slash(dest_dir);
171
172 for (j = 0; j < last - first; j++) {
173 const char *path =
174 active_cache[first + j]->name;
175 source[count + j] = path;
176 destination[count + j] =
177 prefix_path(dest_dir, dst_len,
178 path + len);
179 modes[count + j] = INDEX;
180 }
181 count += last - first;
182 }
183
184 goto next;
185 }
186
187 if (!bad && lstat(destination[i], &st) == 0) {
188 bad = "destination exists";
189 if (force) {
190 /*
191 * only files can overwrite each other:
192 * check both source and destination
193 */
194 if (S_ISREG(st.st_mode)) {
195 fprintf(stderr, "Warning: %s;"
196 " will overwrite!\n",
197 bad);
198 bad = NULL;
199 path_list_insert(destination[i],
200 &overwritten);
201 } else
202 bad = "Cannot overwrite";
203 }
204 }
205
206 if (!bad &&
207 !strncmp(destination[i], source[i], strlen(source[i])))
208 bad = "can not move directory into itself";
209
210 if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
211 bad = "not under version control";
212
213 if (!bad) {
214 if (path_list_has_path(&src_for_dst, destination[i]))
215 bad = "multiple sources for the same target";
216 else
217 path_list_insert(destination[i], &src_for_dst);
218 }
219
220 next:
221 if (bad) {
222 if (ignore_errors) {
223 if (--count > 0) {
224 memmove(source + i, source + i + 1,
225 (count - i) * sizeof(char *));
226 memmove(destination + i,
227 destination + i + 1,
228 (count - i) * sizeof(char *));
229 }
230 } else
231 die ("%s, source=%s, destination=%s",
232 bad, source[i], destination[i]);
233 }
234 }
235
236 for (i = 0; i < count; i++) {
237 if (show_only || verbose)
238 printf("Renaming %s to %s\n",
239 source[i], destination[i]);
240 if (!show_only && modes[i] != INDEX &&
241 rename(source[i], destination[i]) < 0 &&
242 !ignore_errors)
243 die ("renaming %s failed: %s",
244 source[i], strerror(errno));
245
246 if (modes[i] == WORKING_DIRECTORY)
247 continue;
248
249 if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
250 path_list_insert(source[i], &deleted);
251
252 /* destination can be a directory with 1 file inside */
253 if (path_list_has_path(&overwritten, destination[i]))
254 path_list_insert(destination[i], &changed);
255 else
256 path_list_insert(destination[i], &added);
257 } else
258 path_list_insert(destination[i], &added);
259 }
260
261 if (show_only) {
262 show_list("Changed : ", &changed);
263 show_list("Adding : ", &added);
264 show_list("Deleting : ", &deleted);
265 } else {
266 for (i = 0; i < changed.nr; i++) {
267 const char *path = changed.items[i].path;
268 int i = cache_name_pos(path, strlen(path));
269 struct cache_entry *ce = active_cache[i];
270
271 if (i < 0)
272 die ("Huh? Cache entry for %s unknown?", path);
273 refresh_cache_entry(ce, 0);
274 }
275
276 for (i = 0; i < added.nr; i++) {
277 const char *path = added.items[i].path;
278 add_file_to_index(path, verbose);
279 }
280
281 for (i = 0; i < deleted.nr; i++) {
282 const char *path = deleted.items[i].path;
283 remove_file_from_cache(path);
284 }
285
286 if (active_cache_changed) {
287 if (write_cache(newfd, active_cache, active_nr) ||
288 close(newfd) ||
289 commit_lock_file(&lock_file))
290 die("Unable to write new index file");
291 }
292 }
293
294 return 0;
295 }
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