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   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 #define SUBMODULE_WITH_GITDIR ((const char *)1)
  59
  60 int cmd_mv(int argc, const char **argv, const char *prefix)
  61 {
  62         int i, newfd, gitmodules_modified = 0;
  63         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  64         struct option builtin_mv_options[] = {
  65                 OPT__VERBOSE(&verbose, N_("be verbose")),
  66                 OPT__DRY_RUN(&show_only, N_("dry run")),
  67                 OPT__FORCE(&force, N_("force move/rename even if target exists")),
  68                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
  69                 OPT_END(),
  70         };
  71         const char **source, **destination, **dest_path, **submodule_gitfile;
  72         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  73         struct stat st;
  74         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
  75
  76         gitmodules_config();
  77         git_config(git_default_config, NULL);
  78
  79         argc = parse_options(argc, argv, prefix, builtin_mv_options,
  80                              builtin_mv_usage, 0);
  81         if (--argc < 1)
  82                 usage_with_options(builtin_mv_usage, builtin_mv_options);
  83
  84         newfd = hold_locked_index(&lock_file, 1);
  85         if (read_cache() < 0)
  86                 die(_("index file corrupt"));
  87
  88         source = internal_copy_pathspec(prefix, argv, argc, 0);
  89         modes = xcalloc(argc, sizeof(enum update_mode));
  90         dest_path = internal_copy_pathspec(prefix, argv + argc, 1, 0);
  91         submodule_gitfile = xcalloc(argc, sizeof(char *));
  92
  93         if (dest_path[0][0] == '\0')
  94                 /* special case: "." was normalized to "" */
  95                 destination = internal_copy_pathspec(dest_path[0], argv, argc, 1);
  96         else if (!lstat(dest_path[0], &st) &&
  97                         S_ISDIR(st.st_mode)) {
  98                 dest_path[0] = add_slash(dest_path[0]);
  99                 destination = internal_copy_pathspec(dest_path[0], argv, argc, 1);
 100         } else {
 101                 if (argc != 1)
 102                         die("destination '%s' is not a directory", dest_path[0]);
 103                 destination = dest_path;
 104         }
 105
 106         /* Checking */
 107         for (i = 0; i < argc; i++) {
 108                 const char *src = source[i], *dst = destination[i];
 109                 int length, src_is_dir;
 110                 const char *bad = NULL;
 111
 112                 if (show_only)
 113                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 114
 115                 length = strlen(src);
 116                 if (lstat(src, &st) < 0)
 117                         bad = _("bad source");
 118                 else if (!strncmp(src, dst, length) &&
 119                                 (dst[length] == 0 || dst[length] == '/')) {
 120                         bad = _("can not move directory into itself");
 121                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
 122                                 && lstat(dst, &st) == 0)
 123                         bad = _("cannot move directory over file");
 124                 else if (src_is_dir) {
 125                         int first = cache_name_pos(src, length);
 126                         if (first >= 0) {
 127                                 struct strbuf submodule_dotgit = STRBUF_INIT;
 128                                 if (!S_ISGITLINK(active_cache[first]->ce_mode))
 129                                         die (_("Huh? Directory %s is in index and no submodule?"), src);
 130                                 if (!is_staging_gitmodules_ok())
 131                                         die (_("Please, stage your changes to .gitmodules or stash them to proceed"));
 132                                 strbuf_addf(&submodule_dotgit, "%s/.git", src);
 133                                 submodule_gitfile[i] = read_gitfile(submodule_dotgit.buf);
 134                                 if (submodule_gitfile[i])
 135                                         submodule_gitfile[i] = xstrdup(submodule_gitfile[i]);
 136                                 else
 137                                         submodule_gitfile[i] = SUBMODULE_WITH_GITDIR;
 138                                 strbuf_release(&submodule_dotgit);
 139                         } else {
 140                                 const char *src_w_slash = add_slash(src);
 141                                 int last, len_w_slash = length + 1;
 142
 143                                 modes[i] = WORKING_DIRECTORY;
 144
 145                                 first = cache_name_pos(src_w_slash, len_w_slash);
 146                                 if (first >= 0)
 147                                         die (_("Huh? %.*s is in index?"),
 148                                                         len_w_slash, src_w_slash);
 149
 150                                 first = -1 - first;
 151                                 for (last = first; last < active_nr; last++) {
 152                                         const char *path = active_cache[last]->name;
 153                                         if (strncmp(path, src_w_slash, len_w_slash))
 154                                                 break;
 155                                 }
 156                                 free((char *)src_w_slash);
 157
 158                                 if (last - first < 1)
 159                                         bad = _("source directory is empty");
 160                                 else {
 161                                         int j, dst_len;
 162
 163                                         if (last - first > 0) {
 164                                                 source = xrealloc(source,
 165                                                                 (argc + last - first)
 166                                                                 * sizeof(char *));
 167                                                 destination = xrealloc(destination,
 168                                                                 (argc + last - first)
 169                                                                 * sizeof(char *));
 170                                                 modes = xrealloc(modes,
 171                                                                 (argc + last - first)
 172                                                                 * sizeof(enum update_mode));
 173                                         }
 174
 175                                         dst = add_slash(dst);
 176                                         dst_len = strlen(dst);
 177
 178                                         for (j = 0; j < last - first; j++) {
 179                                                 const char *path =
 180                                                         active_cache[first + j]->name;
 181                                                 source[argc + j] = path;
 182                                                 destination[argc + j] =
 183                                                         prefix_path(dst, dst_len,
 184                                                                 path + length + 1);
 185                                                 modes[argc + j] = INDEX;
 186                                         }
 187                                         argc += last - first;
 188                                 }
 189                         }
 190                 } else if (cache_name_pos(src, length) < 0)
 191                         bad = _("not under version control");
 192                 else if (lstat(dst, &st) == 0) {
 193                         bad = _("destination exists");
 194                         if (force) {
 195                                 /*
 196                                  * only files can overwrite each other:
 197                                  * check both source and destination
 198                                  */
 199                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 200                                         if (verbose)
 201                                                 warning(_("overwriting '%s'"), dst);
 202                                         bad = NULL;
 203                                 } else
 204                                         bad = _("Cannot overwrite");
 205                         }
 206                 } else if (string_list_has_string(&src_for_dst, dst))
 207                         bad = _("multiple sources for the same target");
 208                 else
 209                         string_list_insert(&src_for_dst, dst);
 210
 211                 if (bad) {
 212                         if (ignore_errors) {
 213                                 if (--argc > 0) {
 214                                         memmove(source + i, source + i + 1,
 215                                                 (argc - i) * sizeof(char *));
 216                                         memmove(destination + i,
 217                                                 destination + i + 1,
 218                                                 (argc - i) * sizeof(char *));
 219                                         i--;
 220                                 }
 221                         } else
 222                                 die (_("%s, source=%s, destination=%s"),
 223                                      bad, src, dst);
 224                 }
 225         }
 226
 227         for (i = 0; i < argc; i++) {
 228                 const char *src = source[i], *dst = destination[i];
 229                 enum update_mode mode = modes[i];
 230                 int pos;
 231                 if (show_only || verbose)
 232                         printf(_("Renaming %s to %s\n"), src, dst);
 233                 if (!show_only && mode != INDEX) {
 234                         if (rename(src, dst) < 0 && !ignore_errors)
 235                                 die_errno (_("renaming '%s' failed"), src);
 236                         if (submodule_gitfile[i]) {
 237                                 if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 238                                         connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
 239                                 if (!update_path_in_gitmodules(src, dst))
 240                                         gitmodules_modified = 1;
 241                         }
 242                 }
 243
 244                 if (mode == WORKING_DIRECTORY)
 245                         continue;
 246
 247                 pos = cache_name_pos(src, strlen(src));
 248                 assert(pos >= 0);
 249                 if (!show_only)
 250                         rename_cache_entry_at(pos, dst);
 251         }
 252
 253         if (gitmodules_modified)
 254                 stage_updated_gitmodules();
 255
 256         if (active_cache_changed) {
 257                 if (write_cache(newfd, active_cache, active_nr) ||
 258                     commit_locked_index(&lock_file))
 259                         die(_("Unable to write new index file"));
 260         }
 261
 262         return 0;
 263 }