lockfile.h: extract new header file for the functions in lockfile.c
[git/git.git] / builtin / mv.c
1 /*
2 * "git mv" builtin command
3 *
4 * Copyright (C) 2006 Johannes Schindelin
5 */
6 #include "builtin.h"
7 #include "lockfile.h"
8 #include "dir.h"
9 #include "cache-tree.h"
10 #include "string-list.h"
11 #include "parse-options.h"
12 #include "submodule.h"
13
14 static const char * const builtin_mv_usage[] = {
15 N_("git mv [options] <source>... <destination>"),
16 NULL
17 };
18
19 #define DUP_BASENAME 1
20 #define KEEP_TRAILING_SLASH 2
21
22 static const char **internal_copy_pathspec(const char *prefix,
23 const char **pathspec,
24 int count, unsigned flags)
25 {
26 int i;
27 const char **result = xmalloc((count + 1) * sizeof(const char *));
28 memcpy(result, pathspec, count * sizeof(const char *));
29 result[count] = NULL;
30 for (i = 0; i < count; i++) {
31 int length = strlen(result[i]);
32 int to_copy = length;
33 while (!(flags & KEEP_TRAILING_SLASH) &&
34 to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
35 to_copy--;
36 if (to_copy != length || flags & DUP_BASENAME) {
37 char *it = xmemdupz(result[i], to_copy);
38 if (flags & DUP_BASENAME) {
39 result[i] = xstrdup(basename(it));
40 free(it);
41 } else
42 result[i] = it;
43 }
44 }
45 return get_pathspec(prefix, result);
46 }
47
48 static const char *add_slash(const char *path)
49 {
50 int len = strlen(path);
51 if (path[len - 1] != '/') {
52 char *with_slash = xmalloc(len + 2);
53 memcpy(with_slash, path, len);
54 with_slash[len++] = '/';
55 with_slash[len] = 0;
56 return with_slash;
57 }
58 return path;
59 }
60
61 static struct lock_file lock_file;
62 #define SUBMODULE_WITH_GITDIR ((const char *)1)
63
64 static void prepare_move_submodule(const char *src, int first,
65 const char **submodule_gitfile)
66 {
67 struct strbuf submodule_dotgit = STRBUF_INIT;
68 if (!S_ISGITLINK(active_cache[first]->ce_mode))
69 die(_("Directory %s is in index and no submodule?"), src);
70 if (!is_staging_gitmodules_ok())
71 die(_("Please stage your changes to .gitmodules or stash them to proceed"));
72 strbuf_addf(&submodule_dotgit, "%s/.git", src);
73 *submodule_gitfile = read_gitfile(submodule_dotgit.buf);
74 if (*submodule_gitfile)
75 *submodule_gitfile = xstrdup(*submodule_gitfile);
76 else
77 *submodule_gitfile = SUBMODULE_WITH_GITDIR;
78 strbuf_release(&submodule_dotgit);
79 }
80
81 static int index_range_of_same_dir(const char *src, int length,
82 int *first_p, int *last_p)
83 {
84 const char *src_w_slash = add_slash(src);
85 int first, last, len_w_slash = length + 1;
86
87 first = cache_name_pos(src_w_slash, len_w_slash);
88 if (first >= 0)
89 die(_("%.*s is in index"), len_w_slash, src_w_slash);
90
91 first = -1 - first;
92 for (last = first; last < active_nr; last++) {
93 const char *path = active_cache[last]->name;
94 if (strncmp(path, src_w_slash, len_w_slash))
95 break;
96 }
97 if (src_w_slash != src)
98 free((char *)src_w_slash);
99 *first_p = first;
100 *last_p = last;
101 return last - first;
102 }
103
104 int cmd_mv(int argc, const char **argv, const char *prefix)
105 {
106 int i, gitmodules_modified = 0;
107 int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
108 struct option builtin_mv_options[] = {
109 OPT__VERBOSE(&verbose, N_("be verbose")),
110 OPT__DRY_RUN(&show_only, N_("dry run")),
111 OPT__FORCE(&force, N_("force move/rename even if target exists")),
112 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
113 OPT_END(),
114 };
115 const char **source, **destination, **dest_path, **submodule_gitfile;
116 enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
117 struct stat st;
118 struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
119
120 gitmodules_config();
121 git_config(git_default_config, NULL);
122
123 argc = parse_options(argc, argv, prefix, builtin_mv_options,
124 builtin_mv_usage, 0);
125 if (--argc < 1)
126 usage_with_options(builtin_mv_usage, builtin_mv_options);
127
128 hold_locked_index(&lock_file, 1);
129 if (read_cache() < 0)
130 die(_("index file corrupt"));
131
132 source = internal_copy_pathspec(prefix, argv, argc, 0);
133 modes = xcalloc(argc, sizeof(enum update_mode));
134 /*
135 * Keep trailing slash, needed to let
136 * "git mv file no-such-dir/" error out.
137 */
138 dest_path = internal_copy_pathspec(prefix, argv + argc, 1,
139 KEEP_TRAILING_SLASH);
140 submodule_gitfile = xcalloc(argc, sizeof(char *));
141
142 if (dest_path[0][0] == '\0')
143 /* special case: "." was normalized to "" */
144 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
145 else if (!lstat(dest_path[0], &st) &&
146 S_ISDIR(st.st_mode)) {
147 dest_path[0] = add_slash(dest_path[0]);
148 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
149 } else {
150 if (argc != 1)
151 die(_("destination '%s' is not a directory"), dest_path[0]);
152 destination = dest_path;
153 }
154
155 /* Checking */
156 for (i = 0; i < argc; i++) {
157 const char *src = source[i], *dst = destination[i];
158 int length, src_is_dir;
159 const char *bad = NULL;
160
161 if (show_only)
162 printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
163
164 length = strlen(src);
165 if (lstat(src, &st) < 0)
166 bad = _("bad source");
167 else if (!strncmp(src, dst, length) &&
168 (dst[length] == 0 || dst[length] == '/')) {
169 bad = _("can not move directory into itself");
170 } else if ((src_is_dir = S_ISDIR(st.st_mode))
171 && lstat(dst, &st) == 0)
172 bad = _("cannot move directory over file");
173 else if (src_is_dir) {
174 int first = cache_name_pos(src, length), last;
175
176 if (first >= 0)
177 prepare_move_submodule(src, first,
178 submodule_gitfile + i);
179 else if (index_range_of_same_dir(src, length,
180 &first, &last) < 1)
181 bad = _("source directory is empty");
182 else { /* last - first >= 1 */
183 int j, dst_len, n;
184
185 modes[i] = WORKING_DIRECTORY;
186 n = argc + last - first;
187 REALLOC_ARRAY(source, n);
188 REALLOC_ARRAY(destination, n);
189 REALLOC_ARRAY(modes, n);
190 REALLOC_ARRAY(submodule_gitfile, n);
191
192 dst = add_slash(dst);
193 dst_len = strlen(dst);
194
195 for (j = 0; j < last - first; j++) {
196 const char *path = active_cache[first + j]->name;
197 source[argc + j] = path;
198 destination[argc + j] =
199 prefix_path(dst, dst_len, path + length + 1);
200 modes[argc + j] = INDEX;
201 submodule_gitfile[argc + j] = NULL;
202 }
203 argc += last - first;
204 }
205 } else if (cache_name_pos(src, length) < 0)
206 bad = _("not under version control");
207 else if (lstat(dst, &st) == 0 &&
208 (!ignore_case || strcasecmp(src, dst))) {
209 bad = _("destination exists");
210 if (force) {
211 /*
212 * only files can overwrite each other:
213 * check both source and destination
214 */
215 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
216 if (verbose)
217 warning(_("overwriting '%s'"), dst);
218 bad = NULL;
219 } else
220 bad = _("Cannot overwrite");
221 }
222 } else if (string_list_has_string(&src_for_dst, dst))
223 bad = _("multiple sources for the same target");
224 else if (is_dir_sep(dst[strlen(dst) - 1]))
225 bad = _("destination directory does not exist");
226 else
227 string_list_insert(&src_for_dst, dst);
228
229 if (!bad)
230 continue;
231 if (!ignore_errors)
232 die(_("%s, source=%s, destination=%s"),
233 bad, src, dst);
234 if (--argc > 0) {
235 int n = argc - i;
236 memmove(source + i, source + i + 1,
237 n * sizeof(char *));
238 memmove(destination + i, destination + i + 1,
239 n * sizeof(char *));
240 memmove(modes + i, modes + i + 1,
241 n * sizeof(enum update_mode));
242 memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
243 n * sizeof(char *));
244 i--;
245 }
246 }
247
248 for (i = 0; i < argc; i++) {
249 const char *src = source[i], *dst = destination[i];
250 enum update_mode mode = modes[i];
251 int pos;
252 if (show_only || verbose)
253 printf(_("Renaming %s to %s\n"), src, dst);
254 if (!show_only && mode != INDEX) {
255 if (rename(src, dst) < 0 && !ignore_errors)
256 die_errno(_("renaming '%s' failed"), src);
257 if (submodule_gitfile[i]) {
258 if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
259 connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
260 if (!update_path_in_gitmodules(src, dst))
261 gitmodules_modified = 1;
262 }
263 }
264
265 if (mode == WORKING_DIRECTORY)
266 continue;
267
268 pos = cache_name_pos(src, strlen(src));
269 assert(pos >= 0);
270 if (!show_only)
271 rename_cache_entry_at(pos, dst);
272 }
273
274 if (gitmodules_modified)
275 stage_updated_gitmodules();
276
277 if (active_cache_changed &&
278 write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
279 die(_("Unable to write new index file"));
280
281 return 0;
282 }