Merge branch 'jn/warn-on-inaccessible-loosen' 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
13 static const char * const builtin_mv_usage[] = {
14         N_("git mv [options] <source>... <destination>"),
15         NULL
16 };
17
18 static const char **copy_pathspec(const char *prefix, const char **pathspec,
19                                   int count, int base_name)
20 {
21         int i;
22         const char **result = xmalloc((count + 1) * sizeof(const char *));
23         memcpy(result, pathspec, count * sizeof(const char *));
24         result[count] = NULL;
25         for (i = 0; i < count; i++) {
26                 int length = strlen(result[i]);
27                 int to_copy = length;
28                 while (to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
29                         to_copy--;
30                 if (to_copy != length || base_name) {
31                         char *it = xmemdupz(result[i], to_copy);
32                         if (base_name) {
33                                 result[i] = xstrdup(basename(it));
34                                 free(it);
35                         } else
36                                 result[i] = it;
37                 }
38         }
39         return get_pathspec(prefix, result);
40 }
41
42 static const char *add_slash(const char *path)
43 {
44         int len = strlen(path);
45         if (path[len - 1] != '/') {
46                 char *with_slash = xmalloc(len + 2);
47                 memcpy(with_slash, path, len);
48                 with_slash[len++] = '/';
49                 with_slash[len] = 0;
50                 return with_slash;
51         }
52         return path;
53 }
54
55 static struct lock_file lock_file;
56
57 int cmd_mv(int argc, const char **argv, const char *prefix)
58 {
59         int i, newfd;
60         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
61         struct option builtin_mv_options[] = {
62                 OPT__VERBOSE(&verbose, N_("be verbose")),
63                 OPT__DRY_RUN(&show_only, N_("dry run")),
64                 OPT__FORCE(&force, N_("force move/rename even if target exists")),
65                 OPT_BOOLEAN('k', NULL, &ignore_errors, N_("skip move/rename errors")),
66                 OPT_END(),
67         };
68         const char **source, **destination, **dest_path;
69         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
70         struct stat st;
71         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
72
73         git_config(git_default_config, NULL);
74
75         argc = parse_options(argc, argv, prefix, builtin_mv_options,
76                              builtin_mv_usage, 0);
77         if (--argc < 1)
78                 usage_with_options(builtin_mv_usage, builtin_mv_options);
79
80         newfd = hold_locked_index(&lock_file, 1);
81         if (read_cache() < 0)
82                 die(_("index file corrupt"));
83
84         source = copy_pathspec(prefix, argv, argc, 0);
85         modes = xcalloc(argc, sizeof(enum update_mode));
86         dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
87
88         if (dest_path[0][0] == '\0')
89                 /* special case: "." was normalized to "" */
90                 destination = copy_pathspec(dest_path[0], argv, argc, 1);
91         else if (!lstat(dest_path[0], &st) &&
92                         S_ISDIR(st.st_mode)) {
93                 dest_path[0] = add_slash(dest_path[0]);
94                 destination = copy_pathspec(dest_path[0], argv, argc, 1);
95         } else {
96                 if (argc != 1)
97                         die("destination '%s' is not a directory", dest_path[0]);
98                 destination = dest_path;
99         }
100
101         /* Checking */
102         for (i = 0; i < argc; i++) {
103                 const char *src = source[i], *dst = destination[i];
104                 int length, src_is_dir;
105                 const char *bad = NULL;
106
107                 if (show_only)
108                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
109
110                 length = strlen(src);
111                 if (lstat(src, &st) < 0)
112                         bad = _("bad source");
113                 else if (!strncmp(src, dst, length) &&
114                                 (dst[length] == 0 || dst[length] == '/')) {
115                         bad = _("can not move directory into itself");
116                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
117                                 && lstat(dst, &st) == 0)
118                         bad = _("cannot move directory over file");
119                 else if (src_is_dir) {
120                         const char *src_w_slash = add_slash(src);
121                         int len_w_slash = length + 1;
122                         int first, last;
123
124                         modes[i] = WORKING_DIRECTORY;
125
126                         first = cache_name_pos(src_w_slash, len_w_slash);
127                         if (first >= 0)
128                                 die (_("Huh? %.*s is in index?"),
129                                                 len_w_slash, src_w_slash);
130
131                         first = -1 - first;
132                         for (last = first; last < active_nr; last++) {
133                                 const char *path = active_cache[last]->name;
134                                 if (strncmp(path, src_w_slash, len_w_slash))
135                                         break;
136                         }
137                         free((char *)src_w_slash);
138
139                         if (last - first < 1)
140                                 bad = _("source directory is empty");
141                         else {
142                                 int j, dst_len;
143
144                                 if (last - first > 0) {
145                                         source = xrealloc(source,
146                                                         (argc + last - first)
147                                                         * sizeof(char *));
148                                         destination = xrealloc(destination,
149                                                         (argc + last - first)
150                                                         * sizeof(char *));
151                                         modes = xrealloc(modes,
152                                                         (argc + last - first)
153                                                         * sizeof(enum update_mode));
154                                 }
155
156                                 dst = add_slash(dst);
157                                 dst_len = strlen(dst);
158
159                                 for (j = 0; j < last - first; j++) {
160                                         const char *path =
161                                                 active_cache[first + j]->name;
162                                         source[argc + j] = path;
163                                         destination[argc + j] =
164                                                 prefix_path(dst, dst_len,
165                                                         path + length + 1);
166                                         modes[argc + j] = INDEX;
167                                 }
168                                 argc += last - first;
169                         }
170                 } else if (cache_name_pos(src, length) < 0)
171                         bad = _("not under version control");
172                 else if (lstat(dst, &st) == 0) {
173                         bad = _("destination exists");
174                         if (force) {
175                                 /*
176                                  * only files can overwrite each other:
177                                  * check both source and destination
178                                  */
179                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
180                                         if (verbose)
181                                                 warning(_("overwriting '%s'"), dst);
182                                         bad = NULL;
183                                 } else
184                                         bad = _("Cannot overwrite");
185                         }
186                 } else if (string_list_has_string(&src_for_dst, dst))
187                         bad = _("multiple sources for the same target");
188                 else
189                         string_list_insert(&src_for_dst, dst);
190
191                 if (bad) {
192                         if (ignore_errors) {
193                                 if (--argc > 0) {
194                                         memmove(source + i, source + i + 1,
195                                                 (argc - i) * sizeof(char *));
196                                         memmove(destination + i,
197                                                 destination + i + 1,
198                                                 (argc - i) * sizeof(char *));
199                                         i--;
200                                 }
201                         } else
202                                 die (_("%s, source=%s, destination=%s"),
203                                      bad, src, dst);
204                 }
205         }
206
207         for (i = 0; i < argc; i++) {
208                 const char *src = source[i], *dst = destination[i];
209                 enum update_mode mode = modes[i];
210                 int pos;
211                 if (show_only || verbose)
212                         printf(_("Renaming %s to %s\n"), src, dst);
213                 if (!show_only && mode != INDEX &&
214                                 rename(src, dst) < 0 && !ignore_errors)
215                         die_errno (_("renaming '%s' failed"), src);
216
217                 if (mode == WORKING_DIRECTORY)
218                         continue;
219
220                 pos = cache_name_pos(src, strlen(src));
221                 assert(pos >= 0);
222                 if (!show_only)
223                         rename_cache_entry_at(pos, dst);
224         }
225
226         if (active_cache_changed) {
227                 if (write_cache(newfd, active_cache, active_nr) ||
228                     commit_locked_index(&lock_file))
229                         die(_("Unable to write new index file"));
230         }
231
232         return 0;
233 }