builtin/mv.c

   1 /*
   2  * "git mv" builtin command
   3  *
   4  * Copyright (C) 2006 Johannes Schindelin
   5  */
   6 #define USE_THE_INDEX_VARIABLE
   7 #include "builtin.h"
   8 #include "abspath.h"
   9 #include "advice.h"
  10 #include "config.h"
  11 #include "environment.h"
  12 #include "gettext.h"
  13 #include "name-hash.h"
  14 #include "object-file.h"
  15 #include "pathspec.h"
  16 #include "lockfile.h"
  17 #include "dir.h"
  18 #include "string-list.h"
  19 #include "parse-options.h"
  20 #include "read-cache-ll.h"
  21 #include "repository.h"
  22 #include "setup.h"
  23 #include "submodule.h"
  24 #include "entry.h"
  25
  26 static const char * const builtin_mv_usage[] = {
  27         N_("git mv [<options>] <source>... <destination>"),
  28         NULL
  29 };
  30
  31 enum update_mode {
  32         WORKING_DIRECTORY = (1 << 1),
  33         INDEX = (1 << 2),
  34         SPARSE = (1 << 3),
  35         SKIP_WORKTREE_DIR = (1 << 4),
  36 };
  37
  38 #define DUP_BASENAME 1
  39 #define KEEP_TRAILING_SLASH 2
  40
  41 static const char **internal_prefix_pathspec(const char *prefix,
  42                                              const char **pathspec,
  43                                              int count, unsigned flags)
  44 {
  45         int i;
  46         const char **result;
  47         int prefixlen = prefix ? strlen(prefix) : 0;
  48         ALLOC_ARRAY(result, count + 1);
  49
  50         /* Create an intermediate copy of the pathspec based on the flags */
  51         for (i = 0; i < count; i++) {
  52                 int length = strlen(pathspec[i]);
  53                 int to_copy = length;
  54                 char *it;
  55                 while (!(flags & KEEP_TRAILING_SLASH) &&
  56                        to_copy > 0 && is_dir_sep(pathspec[i][to_copy - 1]))
  57                         to_copy--;
  58
  59                 it = xmemdupz(pathspec[i], to_copy);
  60                 if (flags & DUP_BASENAME) {
  61                         result[i] = xstrdup(basename(it));
  62                         free(it);
  63                 } else {
  64                         result[i] = it;
  65                 }
  66         }
  67         result[count] = NULL;
  68
  69         /* Prefix the pathspec and free the old intermediate strings */
  70         for (i = 0; i < count; i++) {
  71                 const char *match = prefix_path(prefix, prefixlen, result[i]);
  72                 free((char *) result[i]);
  73                 result[i] = match;
  74         }
  75
  76         return result;
  77 }
  78
  79 static const char *add_slash(const char *path)
  80 {
  81         size_t len = strlen(path);
  82         if (len && path[len - 1] != '/') {
  83                 char *with_slash = xmalloc(st_add(len, 2));
  84                 memcpy(with_slash, path, len);
  85                 with_slash[len++] = '/';
  86                 with_slash[len] = 0;
  87                 return with_slash;
  88         }
  89         return path;
  90 }
  91
  92 #define SUBMODULE_WITH_GITDIR ((const char *)1)
  93
  94 static void prepare_move_submodule(const char *src, int first,
  95                                    const char **submodule_gitfile)
  96 {
  97         struct strbuf submodule_dotgit = STRBUF_INIT;
  98         if (!S_ISGITLINK(the_index.cache[first]->ce_mode))
  99                 die(_("Directory %s is in index and no submodule?"), src);
 100         if (!is_staging_gitmodules_ok(&the_index))
 101                 die(_("Please stage your changes to .gitmodules or stash them to proceed"));
 102         strbuf_addf(&submodule_dotgit, "%s/.git", src);
 103         *submodule_gitfile = read_gitfile(submodule_dotgit.buf);
 104         if (*submodule_gitfile)
 105                 *submodule_gitfile = xstrdup(*submodule_gitfile);
 106         else
 107                 *submodule_gitfile = SUBMODULE_WITH_GITDIR;
 108         strbuf_release(&submodule_dotgit);
 109 }
 110
 111 static int index_range_of_same_dir(const char *src, int length,
 112                                    int *first_p, int *last_p)
 113 {
 114         const char *src_w_slash = add_slash(src);
 115         int first, last, len_w_slash = length + 1;
 116
 117         first = index_name_pos(&the_index, src_w_slash, len_w_slash);
 118         if (first >= 0)
 119                 die(_("%.*s is in index"), len_w_slash, src_w_slash);
 120
 121         first = -1 - first;
 122         for (last = first; last < the_index.cache_nr; last++) {
 123                 const char *path = the_index.cache[last]->name;
 124                 if (strncmp(path, src_w_slash, len_w_slash))
 125                         break;
 126         }
 127         if (src_w_slash != src)
 128                 free((char *)src_w_slash);
 129         *first_p = first;
 130         *last_p = last;
 131         return last - first;
 132 }
 133
 134 /*
 135  * Given the path of a directory that does not exist on-disk, check whether the
 136  * directory contains any entries in the index with the SKIP_WORKTREE flag
 137  * enabled.
 138  * Return 1 if such index entries exist.
 139  * Return 0 otherwise.
 140  */
 141 static int empty_dir_has_sparse_contents(const char *name)
 142 {
 143         int ret = 0;
 144         const char *with_slash = add_slash(name);
 145         int length = strlen(with_slash);
 146
 147         int pos = index_name_pos(&the_index, with_slash, length);
 148         const struct cache_entry *ce;
 149
 150         if (pos < 0) {
 151                 pos = -pos - 1;
 152                 if (pos >= the_index.cache_nr)
 153                         goto free_return;
 154                 ce = the_index.cache[pos];
 155                 if (strncmp(with_slash, ce->name, length))
 156                         goto free_return;
 157                 if (ce_skip_worktree(ce))
 158                         ret = 1;
 159         }
 160
 161 free_return:
 162         if (with_slash != name)
 163                 free((char *)with_slash);
 164         return ret;
 165 }
 166
 167 int cmd_mv(int argc, const char **argv, const char *prefix)
 168 {
 169         int i, flags, gitmodules_modified = 0;
 170         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0, ignore_sparse = 0;
 171         struct option builtin_mv_options[] = {
 172                 OPT__VERBOSE(&verbose, N_("be verbose")),
 173                 OPT__DRY_RUN(&show_only, N_("dry run")),
 174                 OPT__FORCE(&force, N_("force move/rename even if target exists"),
 175                            PARSE_OPT_NOCOMPLETE),
 176                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
 177                 OPT_BOOL(0, "sparse", &ignore_sparse, N_("allow updating entries outside of the sparse-checkout cone")),
 178                 OPT_END(),
 179         };
 180         const char **source, **destination, **dest_path, **submodule_gitfile;
 181         const char *dst_w_slash;
 182         const char **src_dir = NULL;
 183         int src_dir_nr = 0, src_dir_alloc = 0;
 184         struct strbuf a_src_dir = STRBUF_INIT;
 185         enum update_mode *modes, dst_mode = 0;
 186         struct stat st, dest_st;
 187         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
 188         struct lock_file lock_file = LOCK_INIT;
 189         struct cache_entry *ce;
 190         struct string_list only_match_skip_worktree = STRING_LIST_INIT_NODUP;
 191         struct string_list dirty_paths = STRING_LIST_INIT_NODUP;
 192
 193         git_config(git_default_config, NULL);
 194
 195         argc = parse_options(argc, argv, prefix, builtin_mv_options,
 196                              builtin_mv_usage, 0);
 197         if (--argc < 1)
 198                 usage_with_options(builtin_mv_usage, builtin_mv_options);
 199
 200         repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR);
 201         if (repo_read_index(the_repository) < 0)
 202                 die(_("index file corrupt"));
 203
 204         source = internal_prefix_pathspec(prefix, argv, argc, 0);
 205         CALLOC_ARRAY(modes, argc);
 206
 207         /*
 208          * Keep trailing slash, needed to let
 209          * "git mv file no-such-dir/" error out, except in the case
 210          * "git mv directory no-such-dir/".
 211          */
 212         flags = KEEP_TRAILING_SLASH;
 213         if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
 214                 flags = 0;
 215         dest_path = internal_prefix_pathspec(prefix, argv + argc, 1, flags);
 216         dst_w_slash = add_slash(dest_path[0]);
 217         submodule_gitfile = xcalloc(argc, sizeof(char *));
 218
 219         if (dest_path[0][0] == '\0')
 220                 /* special case: "." was normalized to "" */
 221                 destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 222         else if (!lstat(dest_path[0], &st) &&
 223                         S_ISDIR(st.st_mode)) {
 224                 destination = internal_prefix_pathspec(dst_w_slash, argv, argc, DUP_BASENAME);
 225         } else {
 226                 if (!path_in_sparse_checkout(dst_w_slash, &the_index) &&
 227                     empty_dir_has_sparse_contents(dst_w_slash)) {
 228                         destination = internal_prefix_pathspec(dst_w_slash, argv, argc, DUP_BASENAME);
 229                         dst_mode = SKIP_WORKTREE_DIR;
 230                 } else if (argc != 1) {
 231                         die(_("destination '%s' is not a directory"), dest_path[0]);
 232                 } else {
 233                         destination = dest_path;
 234                         /*
 235                          * <destination> is a file outside of sparse-checkout
 236                          * cone. Insist on cone mode here for backward
 237                          * compatibility. We don't want dst_mode to be assigned
 238                          * for a file when the repo is using no-cone mode (which
 239                          * is deprecated at this point) sparse-checkout. As
 240                          * SPARSE here is only considering cone-mode situation.
 241                          */
 242                         if (!path_in_cone_mode_sparse_checkout(destination[0], &the_index))
 243                                 dst_mode = SPARSE;
 244                 }
 245         }
 246         if (dst_w_slash != dest_path[0]) {
 247                 free((char *)dst_w_slash);
 248                 dst_w_slash = NULL;
 249         }
 250
 251         /* Checking */
 252         for (i = 0; i < argc; i++) {
 253                 const char *src = source[i], *dst = destination[i];
 254                 int length;
 255                 const char *bad = NULL;
 256                 int skip_sparse = 0;
 257
 258                 if (show_only)
 259                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 260
 261                 length = strlen(src);
 262                 if (lstat(src, &st) < 0) {
 263                         int pos;
 264                         const struct cache_entry *ce;
 265
 266                         pos = index_name_pos(&the_index, src, length);
 267                         if (pos < 0) {
 268                                 const char *src_w_slash = add_slash(src);
 269                                 if (!path_in_sparse_checkout(src_w_slash, &the_index) &&
 270                                     empty_dir_has_sparse_contents(src)) {
 271                                         modes[i] |= SKIP_WORKTREE_DIR;
 272                                         goto dir_check;
 273                                 }
 274                                 /* only error if existence is expected. */
 275                                 if (!(modes[i] & SPARSE))
 276                                         bad = _("bad source");
 277                                 goto act_on_entry;
 278                         }
 279                         ce = the_index.cache[pos];
 280                         if (!ce_skip_worktree(ce)) {
 281                                 bad = _("bad source");
 282                                 goto act_on_entry;
 283                         }
 284                         if (!ignore_sparse) {
 285                                 string_list_append(&only_match_skip_worktree, src);
 286                                 goto act_on_entry;
 287                         }
 288                         /* Check if dst exists in index */
 289                         if (index_name_pos(&the_index, dst, strlen(dst)) < 0) {
 290                                 modes[i] |= SPARSE;
 291                                 goto act_on_entry;
 292                         }
 293                         if (!force) {
 294                                 bad = _("destination exists");
 295                                 goto act_on_entry;
 296                         }
 297                         modes[i] |= SPARSE;
 298                         goto act_on_entry;
 299                 }
 300                 if (!strncmp(src, dst, length) &&
 301                     (dst[length] == 0 || dst[length] == '/')) {
 302                         bad = _("can not move directory into itself");
 303                         goto act_on_entry;
 304                 }
 305                 if (S_ISDIR(st.st_mode)
 306                     && lstat(dst, &dest_st) == 0) {
 307                         bad = _("destination already exists");
 308                         goto act_on_entry;
 309                 }
 310
 311 dir_check:
 312                 if (S_ISDIR(st.st_mode)) {
 313                         int j, dst_len, n;
 314                         int first = index_name_pos(&the_index, src, length), last;
 315
 316                         if (first >= 0) {
 317                                 prepare_move_submodule(src, first,
 318                                                        submodule_gitfile + i);
 319                                 goto act_on_entry;
 320                         } else if (index_range_of_same_dir(src, length,
 321                                                            &first, &last) < 1) {
 322                                 bad = _("source directory is empty");
 323                                 goto act_on_entry;
 324                         }
 325
 326                         /* last - first >= 1 */
 327                         modes[i] |= WORKING_DIRECTORY;
 328
 329                         ALLOC_GROW(src_dir, src_dir_nr + 1, src_dir_alloc);
 330                         src_dir[src_dir_nr++] = src;
 331
 332                         n = argc + last - first;
 333                         REALLOC_ARRAY(source, n);
 334                         REALLOC_ARRAY(destination, n);
 335                         REALLOC_ARRAY(modes, n);
 336                         REALLOC_ARRAY(submodule_gitfile, n);
 337
 338                         dst = add_slash(dst);
 339                         dst_len = strlen(dst);
 340
 341                         for (j = 0; j < last - first; j++) {
 342                                 const struct cache_entry *ce = the_index.cache[first + j];
 343                                 const char *path = ce->name;
 344                                 source[argc + j] = path;
 345                                 destination[argc + j] =
 346                                         prefix_path(dst, dst_len, path + length + 1);
 347                                 memset(modes + argc + j, 0, sizeof(enum update_mode));
 348                                 modes[argc + j] |= ce_skip_worktree(ce) ? SPARSE : INDEX;
 349                                 submodule_gitfile[argc + j] = NULL;
 350                         }
 351                         argc += last - first;
 352                         goto act_on_entry;
 353                 }
 354                 if (!(ce = index_file_exists(&the_index, src, length, 0))) {
 355                         bad = _("not under version control");
 356                         goto act_on_entry;
 357                 }
 358                 if (ce_stage(ce)) {
 359                         bad = _("conflicted");
 360                         goto act_on_entry;
 361                 }
 362                 if (lstat(dst, &st) == 0 &&
 363                     (!ignore_case || strcasecmp(src, dst))) {
 364                         bad = _("destination exists");
 365                         if (force) {
 366                                 /*
 367                                  * only files can overwrite each other:
 368                                  * check both source and destination
 369                                  */
 370                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 371                                         if (verbose)
 372                                                 warning(_("overwriting '%s'"), dst);
 373                                         bad = NULL;
 374                                 } else
 375                                         bad = _("Cannot overwrite");
 376                         }
 377                         goto act_on_entry;
 378                 }
 379                 if (string_list_has_string(&src_for_dst, dst)) {
 380                         bad = _("multiple sources for the same target");
 381                         goto act_on_entry;
 382                 }
 383                 if (is_dir_sep(dst[strlen(dst) - 1])) {
 384                         bad = _("destination directory does not exist");
 385                         goto act_on_entry;
 386                 }
 387
 388                 if (ignore_sparse &&
 389                     (dst_mode & (SKIP_WORKTREE_DIR | SPARSE)) &&
 390                     index_entry_exists(&the_index, dst, strlen(dst))) {
 391                         bad = _("destination exists in the index");
 392                         if (force) {
 393                                 if (verbose)
 394                                         warning(_("overwriting '%s'"), dst);
 395                                 bad = NULL;
 396                         } else {
 397                                 goto act_on_entry;
 398                         }
 399                 }
 400                 /*
 401                  * We check if the paths are in the sparse-checkout
 402                  * definition as a very final check, since that
 403                  * allows us to point the user to the --sparse
 404                  * option as a way to have a successful run.
 405                  */
 406                 if (!ignore_sparse &&
 407                     !path_in_sparse_checkout(src, &the_index)) {
 408                         string_list_append(&only_match_skip_worktree, src);
 409                         skip_sparse = 1;
 410                 }
 411                 if (!ignore_sparse &&
 412                     !path_in_sparse_checkout(dst, &the_index)) {
 413                         string_list_append(&only_match_skip_worktree, dst);
 414                         skip_sparse = 1;
 415                 }
 416
 417                 if (skip_sparse)
 418                         goto remove_entry;
 419
 420                 string_list_insert(&src_for_dst, dst);
 421
 422 act_on_entry:
 423                 if (!bad)
 424                         continue;
 425                 if (!ignore_errors)
 426                         die(_("%s, source=%s, destination=%s"),
 427                              bad, src, dst);
 428 remove_entry:
 429                 if (--argc > 0) {
 430                         int n = argc - i;
 431                         MOVE_ARRAY(source + i, source + i + 1, n);
 432                         MOVE_ARRAY(destination + i, destination + i + 1, n);
 433                         MOVE_ARRAY(modes + i, modes + i + 1, n);
 434                         MOVE_ARRAY(submodule_gitfile + i,
 435                                    submodule_gitfile + i + 1, n);
 436                         i--;
 437                 }
 438         }
 439
 440         if (only_match_skip_worktree.nr) {
 441                 advise_on_updating_sparse_paths(&only_match_skip_worktree);
 442                 if (!ignore_errors)
 443                         return 1;
 444         }
 445
 446         for (i = 0; i < argc; i++) {
 447                 const char *src = source[i], *dst = destination[i];
 448                 enum update_mode mode = modes[i];
 449                 int pos;
 450                 int sparse_and_dirty = 0;
 451                 struct checkout state = CHECKOUT_INIT;
 452                 state.istate = &the_index;
 453
 454                 if (force)
 455                         state.force = 1;
 456                 if (show_only || verbose)
 457                         printf(_("Renaming %s to %s\n"), src, dst);
 458                 if (show_only)
 459                         continue;
 460                 if (!(mode & (INDEX | SPARSE | SKIP_WORKTREE_DIR)) &&
 461                     !(dst_mode & (SKIP_WORKTREE_DIR | SPARSE)) &&
 462                     rename(src, dst) < 0) {
 463                         if (ignore_errors)
 464                                 continue;
 465                         die_errno(_("renaming '%s' failed"), src);
 466                 }
 467                 if (submodule_gitfile[i]) {
 468                         if (!update_path_in_gitmodules(src, dst))
 469                                 gitmodules_modified = 1;
 470                         if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 471                                 connect_work_tree_and_git_dir(dst,
 472                                                               submodule_gitfile[i],
 473                                                               1);
 474                 }
 475
 476                 if (mode & (WORKING_DIRECTORY | SKIP_WORKTREE_DIR))
 477                         continue;
 478
 479                 pos = index_name_pos(&the_index, src, strlen(src));
 480                 assert(pos >= 0);
 481                 if (!(mode & SPARSE) && !lstat(src, &st))
 482                         sparse_and_dirty = ie_modified(&the_index,
 483                                                        the_index.cache[pos],
 484                                                        &st,
 485                                                        0);
 486                 rename_index_entry_at(&the_index, pos, dst);
 487
 488                 if (ignore_sparse &&
 489                     core_apply_sparse_checkout &&
 490                     core_sparse_checkout_cone) {
 491                         /*
 492                          * NEEDSWORK: we are *not* paying attention to
 493                          * "out-to-out" move (<source> is out-of-cone and
 494                          * <destination> is out-of-cone) at this point. It
 495                          * should be added in a future patch.
 496                          */
 497                         if ((mode & SPARSE) &&
 498                             path_in_sparse_checkout(dst, &the_index)) {
 499                                 /* from out-of-cone to in-cone */
 500                                 int dst_pos = index_name_pos(&the_index, dst,
 501                                                              strlen(dst));
 502                                 struct cache_entry *dst_ce = the_index.cache[dst_pos];
 503
 504                                 dst_ce->ce_flags &= ~CE_SKIP_WORKTREE;
 505
 506                                 if (checkout_entry(dst_ce, &state, NULL, NULL))
 507                                         die(_("cannot checkout %s"), dst_ce->name);
 508                         } else if ((dst_mode & (SKIP_WORKTREE_DIR | SPARSE)) &&
 509                                    !(mode & SPARSE) &&
 510                                    !path_in_sparse_checkout(dst, &the_index)) {
 511                                 /* from in-cone to out-of-cone */
 512                                 int dst_pos = index_name_pos(&the_index, dst,
 513                                                              strlen(dst));
 514                                 struct cache_entry *dst_ce = the_index.cache[dst_pos];
 515
 516                                 /*
 517                                  * if src is clean, it will suffice to remove it
 518                                  */
 519                                 if (!sparse_and_dirty) {
 520                                         dst_ce->ce_flags |= CE_SKIP_WORKTREE;
 521                                         unlink_or_warn(src);
 522                                 } else {
 523                                         /*
 524                                          * if src is dirty, move it to the
 525                                          * destination and create leading
 526                                          * dirs if necessary
 527                                          */
 528                                         char *dst_dup = xstrdup(dst);
 529                                         string_list_append(&dirty_paths, dst);
 530                                         safe_create_leading_directories(dst_dup);
 531                                         FREE_AND_NULL(dst_dup);
 532                                         rename(src, dst);
 533                                 }
 534                         }
 535                 }
 536         }
 537
 538         /*
 539          * cleanup the empty src_dirs
 540          */
 541         for (i = 0; i < src_dir_nr; i++) {
 542                 int dummy;
 543                 strbuf_addstr(&a_src_dir, src_dir[i]);
 544                 /*
 545                  * if entries under a_src_dir are all moved away,
 546                  * recursively remove a_src_dir to cleanup
 547                  */
 548                 if (index_range_of_same_dir(a_src_dir.buf, a_src_dir.len,
 549                                             &dummy, &dummy) < 1) {
 550                         remove_dir_recursively(&a_src_dir, 0);
 551                 }
 552                 strbuf_reset(&a_src_dir);
 553         }
 554
 555         strbuf_release(&a_src_dir);
 556         free(src_dir);
 557
 558         if (dirty_paths.nr)
 559                 advise_on_moving_dirty_path(&dirty_paths);
 560
 561         if (gitmodules_modified)
 562                 stage_updated_gitmodules(&the_index);
 563
 564         if (write_locked_index(&the_index, &lock_file,
 565                                COMMIT_LOCK | SKIP_IF_UNCHANGED))
 566                 die(_("Unable to write new index file"));
 567
 568         string_list_clear(&src_for_dst, 0);
 569         string_list_clear(&dirty_paths, 0);
 570         UNLEAK(source);
 571         UNLEAK(dest_path);
 572         free(submodule_gitfile);
 573         free(modes);
 574         return 0;
 575 }