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