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"
12static const char * const builtin_mv_usage[] = {
14 "git-mv [options] <source>... <destination>",
15 NULL
16};
17static const char **copy_pathspec(const char *prefix, const char **pathspec,
19 int count, int base_name)
20{
21 int i;
22 int len = prefix ? strlen(prefix) : 0;
23 const char **result = xmalloc((count + 1) * sizeof(const char *));
24 memcpy(result, pathspec, count * sizeof(const char *));
25 result[count] = NULL;
26 for (i = 0; i < count; i++) {
27 int length = strlen(result[i]);
28 if (length > 0 && result[i][length - 1] == '/') {
29 result[i] = xmemdupz(result[i], length - 1);
30 }
31 if (base_name) {
32 const char *last_slash = strrchr(result[i], '/');
33 if (last_slash)
34 result[i] = last_slash + 1;
35 }
36 result[i] = prefix_path(prefix, len, result[i]);
37 if (!result[i])
38 exit(1); /* error already given */
39 }
40 return result;
41}
42static void show_list(const char *label, struct path_list *list)
44{
45 if (list->nr > 0) {
46 int i;
47 printf("%s", label);
48 for (i = 0; i < list->nr; i++)
49 printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
50 putchar('\n');
51 }
52}
53static const char *add_slash(const char *path)
55{
56 int len = strlen(path);
57 if (path[len - 1] != '/') {
58 char *with_slash = xmalloc(len + 2);
59 memcpy(with_slash, path, len);
60 with_slash[len++] = '/';
61 with_slash[len] = 0;
62 return with_slash;
63 }
64 return path;
65}
66static struct lock_file lock_file;
68int cmd_mv(int argc, const char **argv, const char *prefix)
70{
71 int i, newfd;
72 int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
73 struct option builtin_mv_options[] = {
74 OPT__DRY_RUN(&show_only),
75 OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"),
76 OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
77 OPT_END(),
78 };
79 const char **source, **destination, **dest_path;
80 enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
81 struct stat st;
82 struct path_list overwritten = {NULL, 0, 0, 0};
83 struct path_list src_for_dst = {NULL, 0, 0, 0};
84 struct path_list added = {NULL, 0, 0, 0};
85 struct path_list deleted = {NULL, 0, 0, 0};
86 struct path_list changed = {NULL, 0, 0, 0};
87 git_config(git_default_config);
89 newfd = hold_locked_index(&lock_file, 1);
91 if (read_cache() < 0)
92 die("index file corrupt");
93 argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0);
95 if (--argc < 1)
96 usage_with_options(builtin_mv_usage, builtin_mv_options);
97 source = copy_pathspec(prefix, argv, argc, 0);
99 modes = xcalloc(argc, sizeof(enum update_mode));
100 dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
101 if (dest_path[0][0] == '\0')
103 /* special case: "." was normalized to "" */
104 destination = copy_pathspec(dest_path[0], argv, argc, 1);
105 else if (!lstat(dest_path[0], &st) &&
106 S_ISDIR(st.st_mode)) {
107 dest_path[0] = add_slash(dest_path[0]);
108 destination = copy_pathspec(dest_path[0], argv, argc, 1);
109 } else {
110 if (argc != 1)
111 usage_with_options(builtin_mv_usage, builtin_mv_options);
112 destination = dest_path;
113 }
114 /* Checking */
116 for (i = 0; i < argc; i++) {
117 const char *src = source[i], *dst = destination[i];
118 int length, src_is_dir;
119 const char *bad = NULL;
120 if (show_only)
122 printf("Checking rename of '%s' to '%s'\n", src, dst);
123 length = strlen(src);
125 if (lstat(src, &st) < 0)
126 bad = "bad source";
127 else if (!strncmp(src, dst, length) &&
128 (dst[length] == 0 || dst[length] == '/')) {
129 bad = "can not move directory into itself";
130 } else if ((src_is_dir = S_ISDIR(st.st_mode))
131 && lstat(dst, &st) == 0)
132 bad = "cannot move directory over file";
133 else if (src_is_dir) {
134 const char *src_w_slash = add_slash(src);
135 int len_w_slash = length + 1;
136 int first, last;
137 modes[i] = WORKING_DIRECTORY;
139 first = cache_name_pos(src_w_slash, len_w_slash);
141 if (first >= 0)
142 die ("Huh? %.*s is in index?",
143 len_w_slash, src_w_slash);
144 first = -1 - first;
146 for (last = first; last < active_nr; last++) {
147 const char *path = active_cache[last]->name;
148 if (strncmp(path, src_w_slash, len_w_slash))
149 break;
150 }
151 free((char *)src_w_slash);
152 if (last - first < 1)
154 bad = "source directory is empty";
155 else {
156 int j, dst_len;
157 if (last - first > 0) {
159 source = xrealloc(source,
160 (argc + last - first)
161 * sizeof(char *));
162 destination = xrealloc(destination,
163 (argc + last - first)
164 * sizeof(char *));
165 modes = xrealloc(modes,
166 (argc + last - first)
167 * sizeof(enum update_mode));
168 }
169 dst = add_slash(dst);
171 dst_len = strlen(dst);
172 for (j = 0; j < last - first; j++) {
174 const char *path =
175 active_cache[first + j]->name;
176 source[argc + j] = path;
177 destination[argc + j] =
178 prefix_path(dst, dst_len,
179 path + length + 1);
180 modes[argc + j] = INDEX;
181 }
182 argc += last - first;
183 }
184 } else if (lstat(dst, &st) == 0) {
185 bad = "destination exists";
186 if (force) {
187 /*
188 * only files can overwrite each other:
189 * check both source and destination
190 */
191 if (S_ISREG(st.st_mode)) {
192 fprintf(stderr, "Warning: %s;"
193 " will overwrite!\n",
194 bad);
195 bad = NULL;
196 path_list_insert(dst, &overwritten);
197 } else
198 bad = "Cannot overwrite";
199 }
200 } else if (cache_name_pos(src, length) < 0)
201 bad = "not under version control";
202 else if (path_list_has_path(&src_for_dst, dst))
203 bad = "multiple sources for the same target";
204 else
205 path_list_insert(dst, &src_for_dst);
206 if (bad) {
208 if (ignore_errors) {
209 if (--argc > 0) {
210 memmove(source + i, source + i + 1,
211 (argc - i) * sizeof(char *));
212 memmove(destination + i,
213 destination + i + 1,
214 (argc - i) * sizeof(char *));
215 }
216 } else
217 die ("%s, source=%s, destination=%s",
218 bad, src, dst);
219 }
220 }
221 for (i = 0; i < argc; i++) {
223 const char *src = source[i], *dst = destination[i];
224 enum update_mode mode = modes[i];
225 if (show_only || verbose)
226 printf("Renaming %s to %s\n", src, dst);
227 if (!show_only && mode != INDEX &&
228 rename(src, dst) < 0 && !ignore_errors)
229 die ("renaming %s failed: %s", src, strerror(errno));
230 if (mode == WORKING_DIRECTORY)
232 continue;
233 if (cache_name_pos(src, strlen(src)) >= 0) {
235 path_list_insert(src, &deleted);
236 /* destination can be a directory with 1 file inside */
238 if (path_list_has_path(&overwritten, dst))
239 path_list_insert(dst, &changed);
240 else
241 path_list_insert(dst, &added);
242 } else
243 path_list_insert(dst, &added);
244 }
245 if (show_only) {
247 show_list("Changed : ", &changed);
248 show_list("Adding : ", &added);
249 show_list("Deleting : ", &deleted);
250 } else {
251 for (i = 0; i < changed.nr; i++) {
252 const char *path = changed.items[i].path;
253 int j = cache_name_pos(path, strlen(path));
254 struct cache_entry *ce = active_cache[j];
255 if (j < 0)
257 die ("Huh? Cache entry for %s unknown?", path);
258 refresh_cache_entry(ce, 0);
259 }
260 for (i = 0; i < added.nr; i++) {
262 const char *path = added.items[i].path;
263 add_file_to_cache(path, verbose);
264 }
265 for (i = 0; i < deleted.nr; i++)
267 remove_file_from_cache(deleted.items[i].path);
268 if (active_cache_changed) {
270 if (write_cache(newfd, active_cache, active_nr) ||
271 commit_locked_index(&lock_file))
272 die("Unable to write new index file");
273 }
274 }
275 return 0;
277}