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[git/dscho.git] / builtin-mv.c
blob4d21d88412cac52cbd5d127de439abc3e172b352
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 - 1] = '\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 (dest_path[0][0] == '\0')
118 /* special case: "." was normalized to "" */
119 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
120 else if (!lstat(dest_path[0], &st) &&
121 S_ISDIR(st.st_mode)) {
122 dest_path[0] = add_slash(dest_path[0]);
123 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
124 } else {
125 if (count != 1)
126 usage(builtin_mv_usage);
127 destination = dest_path;
128 }
129
130 /* Checking */
131 for (i = 0; i < count; i++) {
132 const char *src = source[i], *dst = destination[i];
133 int length, src_is_dir;
134 const char *bad = NULL;
135
136 if (show_only)
137 printf("Checking rename of '%s' to '%s'\n", src, dst);
138
139 length = strlen(src);
140 if (lstat(src, &st) < 0)
141 bad = "bad source";
142 else if (!strncmp(src, dst, length) &&
143 (dst[length] == 0 || dst[length] == '/')) {
144 bad = "can not move directory into itself";
145 } else if ((src_is_dir = S_ISDIR(st.st_mode))
146 && lstat(dst, &st) == 0)
147 bad = "cannot move directory over file";
148 else if (src_is_dir) {
149 int first, last;
150
151 modes[i] = WORKING_DIRECTORY;
152
153 first = cache_name_pos(src, length);
154 if (first >= 0)
155 die ("Huh? %s/ is in index?", src);
156
157 first = -1 - first;
158 for (last = first; last < active_nr; last++) {
159 const char *path = active_cache[last]->name;
160 if (strncmp(path, src, length)
161 || path[length] != '/')
162 break;
163 }
164
165 if (last - first < 1)
166 bad = "source directory is empty";
167 else {
168 int j, dst_len;
169
170 if (last - first > 0) {
171 source = xrealloc(source,
172 (count + last - first)
173 * sizeof(char *));
174 destination = xrealloc(destination,
175 (count + last - first)
176 * sizeof(char *));
177 modes = xrealloc(modes,
178 (count + last - first)
179 * sizeof(enum update_mode));
180 }
181
182 dst = add_slash(dst);
183 dst_len = strlen(dst) - 1;
184
185 for (j = 0; j < last - first; j++) {
186 const char *path =
187 active_cache[first + j]->name;
188 source[count + j] = path;
189 destination[count + j] =
190 prefix_path(dst, dst_len,
191 path + length);
192 modes[count + j] = INDEX;
193 }
194 count += last - first;
195 }
196 } else if (lstat(dst, &st) == 0) {
197 bad = "destination exists";
198 if (force) {
199 /*
200 * only files can overwrite each other:
201 * check both source and destination
202 */
203 if (S_ISREG(st.st_mode)) {
204 fprintf(stderr, "Warning: %s;"
205 " will overwrite!\n",
206 bad);
207 bad = NULL;
208 path_list_insert(dst, &overwritten);
209 } else
210 bad = "Cannot overwrite";
211 }
212 } else if (cache_name_pos(src, length) < 0)
213 bad = "not under version control";
214 else if (path_list_has_path(&src_for_dst, dst))
215 bad = "multiple sources for the same target";
216 else
217 path_list_insert(dst, &src_for_dst);
218
219 if (bad) {
220 if (ignore_errors) {
221 if (--count > 0) {
222 memmove(source + i, source + i + 1,
223 (count - i) * sizeof(char *));
224 memmove(destination + i,
225 destination + i + 1,
226 (count - i) * sizeof(char *));
227 }
228 } else
229 die ("%s, source=%s, destination=%s",
230 bad, src, dst);
231 }
232 }
233
234 for (i = 0; i < count; i++) {
235 const char *src = source[i], *dst = destination[i];
236 enum update_mode mode = modes[i];
237 if (show_only || verbose)
238 printf("Renaming %s to %s\n", src, dst);
239 if (!show_only && mode != INDEX &&
240 rename(src, dst) < 0 && !ignore_errors)
241 die ("renaming %s failed: %s", src, strerror(errno));
242
243 if (mode == WORKING_DIRECTORY)
244 continue;
245
246 if (cache_name_pos(src, strlen(src)) >= 0) {
247 path_list_insert(src, &deleted);
248
249 /* destination can be a directory with 1 file inside */
250 if (path_list_has_path(&overwritten, dst))
251 path_list_insert(dst, &changed);
252 else
253 path_list_insert(dst, &added);
254 } else
255 path_list_insert(dst, &added);
256 }
257
258 if (show_only) {
259 show_list("Changed : ", &changed);
260 show_list("Adding : ", &added);
261 show_list("Deleting : ", &deleted);
262 } else {
263 for (i = 0; i < changed.nr; i++) {
264 const char *path = changed.items[i].path;
265 int j = cache_name_pos(path, strlen(path));
266 struct cache_entry *ce = active_cache[j];
267
268 if (j < 0)
269 die ("Huh? Cache entry for %s unknown?", path);
270 refresh_cache_entry(ce, 0);
271 }
272
273 for (i = 0; i < added.nr; i++) {
274 const char *path = added.items[i].path;
275 add_file_to_index(path, verbose);
276 }
277
278 for (i = 0; i < deleted.nr; i++) {
279 const char *path = deleted.items[i].path;
280 remove_file_from_cache(path);
281 }
282
283 if (active_cache_changed) {
284 if (write_cache(newfd, active_cache, active_nr) ||
285 close(newfd) ||
286 commit_lock_file(&lock_file))
287 die("Unable to write new index file");
288 }
289 }
290
291 return 0;
292 }
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