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