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