builtin/mv.c

   1 /*
   2  * "git mv" builtin command
   3  *
   4  * Copyright (C) 2006 Johannes Schindelin
   5  */
   6 #define USE_THE_INDEX_COMPATIBILITY_MACROS
   7 #include "builtin.h"
   8 #include "config.h"
   9 #include "pathspec.h"
  10 #include "lockfile.h"
  11 #include "dir.h"
  12 #include "cache-tree.h"
  13 #include "string-list.h"
  14 #include "parse-options.h"
  15 #include "submodule.h"
  16
  17 static const char * const builtin_mv_usage[] = {
  18         N_("git mv [<options>] <source>... <destination>"),
  19         NULL
  20 };
  21
  22 #define DUP_BASENAME 1
  23 #define KEEP_TRAILING_SLASH 2
  24
  25 static const char **internal_prefix_pathspec(const char *prefix,
  26                                              const char **pathspec,
  27                                              int count, unsigned flags)
  28 {
  29         int i;
  30         const char **result;
  31         int prefixlen = prefix ? strlen(prefix) : 0;
  32         ALLOC_ARRAY(result, count + 1);
  33
  34         /* Create an intermediate copy of the pathspec based on the flags */
  35         for (i = 0; i < count; i++) {
  36                 int length = strlen(pathspec[i]);
  37                 int to_copy = length;
  38                 char *it;
  39                 while (!(flags & KEEP_TRAILING_SLASH) &&
  40                        to_copy > 0 && is_dir_sep(pathspec[i][to_copy - 1]))
  41                         to_copy--;
  42
  43                 it = xmemdupz(pathspec[i], to_copy);
  44                 if (flags & DUP_BASENAME) {
  45                         result[i] = xstrdup(basename(it));
  46                         free(it);
  47                 } else {
  48                         result[i] = it;
  49                 }
  50         }
  51         result[count] = NULL;
  52
  53         /* Prefix the pathspec and free the old intermediate strings */
  54         for (i = 0; i < count; i++) {
  55                 const char *match = prefix_path(prefix, prefixlen, result[i]);
  56                 free((char *) result[i]);
  57                 result[i] = match;
  58         }
  59
  60         return result;
  61 }
  62
  63 static const char *add_slash(const char *path)
  64 {
  65         size_t len = strlen(path);
  66         if (path[len - 1] != '/') {
  67                 char *with_slash = xmalloc(st_add(len, 2));
  68                 memcpy(with_slash, path, len);
  69                 with_slash[len++] = '/';
  70                 with_slash[len] = 0;
  71                 return with_slash;
  72         }
  73         return path;
  74 }
  75
  76 #define SUBMODULE_WITH_GITDIR ((const char *)1)
  77
  78 static void prepare_move_submodule(const char *src, int first,
  79                                    const char **submodule_gitfile)
  80 {
  81         struct strbuf submodule_dotgit = STRBUF_INIT;
  82         if (!S_ISGITLINK(active_cache[first]->ce_mode))
  83                 die(_("Directory %s is in index and no submodule?"), src);
  84         if (!is_staging_gitmodules_ok(&the_index))
  85                 die(_("Please stage your changes to .gitmodules or stash them to proceed"));
  86         strbuf_addf(&submodule_dotgit, "%s/.git", src);
  87         *submodule_gitfile = read_gitfile(submodule_dotgit.buf);
  88         if (*submodule_gitfile)
  89                 *submodule_gitfile = xstrdup(*submodule_gitfile);
  90         else
  91                 *submodule_gitfile = SUBMODULE_WITH_GITDIR;
  92         strbuf_release(&submodule_dotgit);
  93 }
  94
  95 static int index_range_of_same_dir(const char *src, int length,
  96                                    int *first_p, int *last_p)
  97 {
  98         const char *src_w_slash = add_slash(src);
  99         int first, last, len_w_slash = length + 1;
 100
 101         first = cache_name_pos(src_w_slash, len_w_slash);
 102         if (first >= 0)
 103                 die(_("%.*s is in index"), len_w_slash, src_w_slash);
 104
 105         first = -1 - first;
 106         for (last = first; last < active_nr; last++) {
 107                 const char *path = active_cache[last]->name;
 108                 if (strncmp(path, src_w_slash, len_w_slash))
 109                         break;
 110         }
 111         if (src_w_slash != src)
 112                 free((char *)src_w_slash);
 113         *first_p = first;
 114         *last_p = last;
 115         return last - first;
 116 }
 117
 118 int cmd_mv(int argc, const char **argv, const char *prefix)
 119 {
 120         int i, flags, gitmodules_modified = 0;
 121         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
 122         struct option builtin_mv_options[] = {
 123                 OPT__VERBOSE(&verbose, N_("be verbose")),
 124                 OPT__DRY_RUN(&show_only, N_("dry run")),
 125                 OPT__FORCE(&force, N_("force move/rename even if target exists"),
 126                            PARSE_OPT_NOCOMPLETE),
 127                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
 128                 OPT_END(),
 129         };
 130         const char **source, **destination, **dest_path, **submodule_gitfile;
 131         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
 132         struct stat st;
 133         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
 134         struct lock_file lock_file = LOCK_INIT;
 135         struct cache_entry *ce;
 136
 137         git_config(git_default_config, NULL);
 138
 139         argc = parse_options(argc, argv, prefix, builtin_mv_options,
 140                              builtin_mv_usage, 0);
 141         if (--argc < 1)
 142                 usage_with_options(builtin_mv_usage, builtin_mv_options);
 143
 144         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 145         if (read_cache() < 0)
 146                 die(_("index file corrupt"));
 147
 148         source = internal_prefix_pathspec(prefix, argv, argc, 0);
 149         modes = xcalloc(argc, sizeof(enum update_mode));
 150         /*
 151          * Keep trailing slash, needed to let
 152          * "git mv file no-such-dir/" error out, except in the case
 153          * "git mv directory no-such-dir/".
 154          */
 155         flags = KEEP_TRAILING_SLASH;
 156         if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
 157                 flags = 0;
 158         dest_path = internal_prefix_pathspec(prefix, argv + argc, 1, flags);
 159         submodule_gitfile = xcalloc(argc, sizeof(char *));
 160
 161         if (dest_path[0][0] == '\0')
 162                 /* special case: "." was normalized to "" */
 163                 destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 164         else if (!lstat(dest_path[0], &st) &&
 165                         S_ISDIR(st.st_mode)) {
 166                 dest_path[0] = add_slash(dest_path[0]);
 167                 destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 168         } else {
 169                 if (argc != 1)
 170                         die(_("destination '%s' is not a directory"), dest_path[0]);
 171                 destination = dest_path;
 172         }
 173
 174         /* Checking */
 175         for (i = 0; i < argc; i++) {
 176                 const char *src = source[i], *dst = destination[i];
 177                 int length, src_is_dir;
 178                 const char *bad = NULL;
 179
 180                 if (show_only)
 181                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 182
 183                 length = strlen(src);
 184                 if (lstat(src, &st) < 0)
 185                         bad = _("bad source");
 186                 else if (!strncmp(src, dst, length) &&
 187                                 (dst[length] == 0 || dst[length] == '/')) {
 188                         bad = _("can not move directory into itself");
 189                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
 190                                 && lstat(dst, &st) == 0)
 191                         bad = _("cannot move directory over file");
 192                 else if (src_is_dir) {
 193                         int first = cache_name_pos(src, length), last;
 194
 195                         if (first >= 0)
 196                                 prepare_move_submodule(src, first,
 197                                                        submodule_gitfile + i);
 198                         else if (index_range_of_same_dir(src, length,
 199                                                          &first, &last) < 1)
 200                                 bad = _("source directory is empty");
 201                         else { /* last - first >= 1 */
 202                                 int j, dst_len, n;
 203
 204                                 modes[i] = WORKING_DIRECTORY;
 205                                 n = argc + last - first;
 206                                 REALLOC_ARRAY(source, n);
 207                                 REALLOC_ARRAY(destination, n);
 208                                 REALLOC_ARRAY(modes, n);
 209                                 REALLOC_ARRAY(submodule_gitfile, n);
 210
 211                                 dst = add_slash(dst);
 212                                 dst_len = strlen(dst);
 213
 214                                 for (j = 0; j < last - first; j++) {
 215                                         const char *path = active_cache[first + j]->name;
 216                                         source[argc + j] = path;
 217                                         destination[argc + j] =
 218                                                 prefix_path(dst, dst_len, path + length + 1);
 219                                         modes[argc + j] = INDEX;
 220                                         submodule_gitfile[argc + j] = NULL;
 221                                 }
 222                                 argc += last - first;
 223                         }
 224                 } else if (!(ce = cache_file_exists(src, length, 0))) {
 225                         bad = _("not under version control");
 226                 } else if (ce_stage(ce)) {
 227                         bad = _("conflicted");
 228                 } else if (lstat(dst, &st) == 0 &&
 229                          (!ignore_case || strcasecmp(src, dst))) {
 230                         bad = _("destination exists");
 231                         if (force) {
 232                                 /*
 233                                  * only files can overwrite each other:
 234                                  * check both source and destination
 235                                  */
 236                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 237                                         if (verbose)
 238                                                 warning(_("overwriting '%s'"), dst);
 239                                         bad = NULL;
 240                                 } else
 241                                         bad = _("Cannot overwrite");
 242                         }
 243                 } else if (string_list_has_string(&src_for_dst, dst))
 244                         bad = _("multiple sources for the same target");
 245                 else if (is_dir_sep(dst[strlen(dst) - 1]))
 246                         bad = _("destination directory does not exist");
 247                 else
 248                         string_list_insert(&src_for_dst, dst);
 249
 250                 if (!bad)
 251                         continue;
 252                 if (!ignore_errors)
 253                         die(_("%s, source=%s, destination=%s"),
 254                              bad, src, dst);
 255                 if (--argc > 0) {
 256                         int n = argc - i;
 257                         memmove(source + i, source + i + 1,
 258                                 n * sizeof(char *));
 259                         memmove(destination + i, destination + i + 1,
 260                                 n * sizeof(char *));
 261                         memmove(modes + i, modes + i + 1,
 262                                 n * sizeof(enum update_mode));
 263                         memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
 264                                 n * sizeof(char *));
 265                         i--;
 266                 }
 267         }
 268
 269         for (i = 0; i < argc; i++) {
 270                 const char *src = source[i], *dst = destination[i];
 271                 enum update_mode mode = modes[i];
 272                 int pos;
 273                 if (show_only || verbose)
 274                         printf(_("Renaming %s to %s\n"), src, dst);
 275                 if (show_only)
 276                         continue;
 277                 if (mode != INDEX && rename(src, dst) < 0) {
 278                         if (ignore_errors)
 279                                 continue;
 280                         die_errno(_("renaming '%s' failed"), src);
 281                 }
 282                 if (submodule_gitfile[i]) {
 283                         if (!update_path_in_gitmodules(src, dst))
 284                                 gitmodules_modified = 1;
 285                         if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 286                                 connect_work_tree_and_git_dir(dst,
 287                                                               submodule_gitfile[i],
 288                                                               1);
 289                 }
 290
 291                 if (mode == WORKING_DIRECTORY)
 292                         continue;
 293
 294                 pos = cache_name_pos(src, strlen(src));
 295                 assert(pos >= 0);
 296                 rename_cache_entry_at(pos, dst);
 297         }
 298
 299         if (gitmodules_modified)
 300                 stage_updated_gitmodules(&the_index);
 301
 302         if (write_locked_index(&the_index, &lock_file,
 303                                COMMIT_LOCK | SKIP_IF_UNCHANGED))
 304                 die(_("Unable to write new index file"));
 305
 306         string_list_clear(&src_for_dst, 0);
 307         UNLEAK(source);
 308         UNLEAK(dest_path);
 309         free(submodule_gitfile);
 310         free(modes);
 311         return 0;
 312 }