Merge branch 'jl/nor-or-nand-and' into maint
[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 "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 int cmd_mv(int argc, const char **argv, const char *prefix)
65 {
66         int i, newfd, gitmodules_modified = 0;
67         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
68         struct option builtin_mv_options[] = {
69                 OPT__VERBOSE(&verbose, N_("be verbose")),
70                 OPT__DRY_RUN(&show_only, N_("dry run")),
71                 OPT__FORCE(&force, N_("force move/rename even if target exists")),
72                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
73                 OPT_END(),
74         };
75         const char **source, **destination, **dest_path, **submodule_gitfile;
76         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
77         struct stat st;
78         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
79
80         gitmodules_config();
81         git_config(git_default_config, NULL);
82
83         argc = parse_options(argc, argv, prefix, builtin_mv_options,
84                              builtin_mv_usage, 0);
85         if (--argc < 1)
86                 usage_with_options(builtin_mv_usage, builtin_mv_options);
87
88         newfd = hold_locked_index(&lock_file, 1);
89         if (read_cache() < 0)
90                 die(_("index file corrupt"));
91
92         source = internal_copy_pathspec(prefix, argv, argc, 0);
93         modes = xcalloc(argc, sizeof(enum update_mode));
94         /*
95          * Keep trailing slash, needed to let
96          * "git mv file no-such-dir/" error out.
97          */
98         dest_path = internal_copy_pathspec(prefix, argv + argc, 1,
99                                            KEEP_TRAILING_SLASH);
100         submodule_gitfile = xcalloc(argc, sizeof(char *));
101
102         if (dest_path[0][0] == '\0')
103                 /* special case: "." was normalized to "" */
104                 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
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 = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
109         } else {
110                 if (argc != 1)
111                         die("destination '%s' is not a directory", dest_path[0]);
112                 destination = dest_path;
113         }
114
115         /* 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
121                 if (show_only)
122                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
123
124                 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                         int first = cache_name_pos(src, length);
135                         if (first >= 0) {
136                                 struct strbuf submodule_dotgit = STRBUF_INIT;
137                                 if (!S_ISGITLINK(active_cache[first]->ce_mode))
138                                         die (_("Huh? Directory %s is in index and no submodule?"), src);
139                                 if (!is_staging_gitmodules_ok())
140                                         die (_("Please, stage your changes to .gitmodules or stash them to proceed"));
141                                 strbuf_addf(&submodule_dotgit, "%s/.git", src);
142                                 submodule_gitfile[i] = read_gitfile(submodule_dotgit.buf);
143                                 if (submodule_gitfile[i])
144                                         submodule_gitfile[i] = xstrdup(submodule_gitfile[i]);
145                                 else
146                                         submodule_gitfile[i] = SUBMODULE_WITH_GITDIR;
147                                 strbuf_release(&submodule_dotgit);
148                         } else {
149                                 const char *src_w_slash = add_slash(src);
150                                 int last, len_w_slash = length + 1;
151
152                                 modes[i] = WORKING_DIRECTORY;
153
154                                 first = cache_name_pos(src_w_slash, len_w_slash);
155                                 if (first >= 0)
156                                         die (_("Huh? %.*s is in index?"),
157                                                         len_w_slash, src_w_slash);
158
159                                 first = -1 - first;
160                                 for (last = first; last < active_nr; last++) {
161                                         const char *path = active_cache[last]->name;
162                                         if (strncmp(path, src_w_slash, len_w_slash))
163                                                 break;
164                                 }
165                                 free((char *)src_w_slash);
166
167                                 if (last - first < 1)
168                                         bad = _("source directory is empty");
169                                 else {
170                                         int j, dst_len;
171
172                                         if (last - first > 0) {
173                                                 source = xrealloc(source,
174                                                                 (argc + last - first)
175                                                                 * sizeof(char *));
176                                                 destination = xrealloc(destination,
177                                                                 (argc + last - first)
178                                                                 * sizeof(char *));
179                                                 modes = xrealloc(modes,
180                                                                 (argc + last - first)
181                                                                 * sizeof(enum update_mode));
182                                                 submodule_gitfile = xrealloc(submodule_gitfile,
183                                                                 (argc + last - first)
184                                                                 * sizeof(char *));
185                                         }
186
187                                         dst = add_slash(dst);
188                                         dst_len = strlen(dst);
189
190                                         for (j = 0; j < last - first; j++) {
191                                                 const char *path =
192                                                         active_cache[first + j]->name;
193                                                 source[argc + j] = path;
194                                                 destination[argc + j] =
195                                                         prefix_path(dst, dst_len,
196                                                                 path + length + 1);
197                                                 modes[argc + j] = INDEX;
198                                                 submodule_gitfile[argc + j] = NULL;
199                                         }
200                                         argc += last - first;
201                                 }
202                         }
203                 } else if (cache_name_pos(src, length) < 0)
204                         bad = _("not under version control");
205                 else if (lstat(dst, &st) == 0) {
206                         bad = _("destination exists");
207                         if (force) {
208                                 /*
209                                  * only files can overwrite each other:
210                                  * check both source and destination
211                                  */
212                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
213                                         if (verbose)
214                                                 warning(_("overwriting '%s'"), dst);
215                                         bad = NULL;
216                                 } else
217                                         bad = _("Cannot overwrite");
218                         }
219                 } else if (string_list_has_string(&src_for_dst, dst))
220                         bad = _("multiple sources for the same target");
221                 else if (is_dir_sep(dst[strlen(dst) - 1]))
222                         bad = _("destination directory does not exist");
223                 else
224                         string_list_insert(&src_for_dst, dst);
225
226                 if (bad) {
227                         if (ignore_errors) {
228                                 if (--argc > 0) {
229                                         memmove(source + i, source + i + 1,
230                                                 (argc - i) * sizeof(char *));
231                                         memmove(destination + i,
232                                                 destination + i + 1,
233                                                 (argc - i) * sizeof(char *));
234                                         memmove(modes + i, modes + i + 1,
235                                                 (argc - i) * sizeof(enum update_mode));
236                                         memmove(submodule_gitfile + i,
237                                                 submodule_gitfile + i + 1,
238                                                 (argc - i) * sizeof(char *));
239                                         i--;
240                                 }
241                         } else
242                                 die (_("%s, source=%s, destination=%s"),
243                                      bad, src, dst);
244                 }
245         }
246
247         for (i = 0; i < argc; i++) {
248                 const char *src = source[i], *dst = destination[i];
249                 enum update_mode mode = modes[i];
250                 int pos;
251                 if (show_only || verbose)
252                         printf(_("Renaming %s to %s\n"), src, dst);
253                 if (!show_only && mode != INDEX) {
254                         if (rename(src, dst) < 0 && !ignore_errors)
255                                 die_errno (_("renaming '%s' failed"), src);
256                         if (submodule_gitfile[i]) {
257                                 if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
258                                         connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
259                                 if (!update_path_in_gitmodules(src, dst))
260                                         gitmodules_modified = 1;
261                         }
262                 }
263
264                 if (mode == WORKING_DIRECTORY)
265                         continue;
266
267                 pos = cache_name_pos(src, strlen(src));
268                 assert(pos >= 0);
269                 if (!show_only)
270                         rename_cache_entry_at(pos, dst);
271         }
272
273         if (gitmodules_modified)
274                 stage_updated_gitmodules();
275
276         if (active_cache_changed) {
277                 if (write_cache(newfd, active_cache, active_nr) ||
278                     commit_locked_index(&lock_file))
279                         die(_("Unable to write new index file"));
280         }
281
282         return 0;
283 }