Andrew's git / gitweb.git / builtin/rm.c
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builtin / rm.con commit preparing for 2.10.3 (c3808ca)
   1/*
   2 * "git rm" builtin command
   3 *
   4 * Copyright (C) Linus Torvalds 2006
   5 */
   6#include "builtin.h"
   7#include "lockfile.h"
   8#include "dir.h"
   9#include "cache-tree.h"
  10#include "tree-walk.h"
  11#include "parse-options.h"
  12#include "string-list.h"
  13#include "submodule.h"
  14#include "pathspec.h"
  15
  16static const char * const builtin_rm_usage[] = {
  17        N_("git rm [<options>] [--] <file>..."),
  18        NULL
  19};
  20
  21static struct {
  22        int nr, alloc;
  23        struct {
  24                const char *name;
  25                char is_submodule;
  26        } *entry;
  27} list;
  28
  29static int get_ours_cache_pos(const char *path, int pos)
  30{
  31        int i = -pos - 1;
  32
  33        while ((i < active_nr) && !strcmp(active_cache[i]->name, path)) {
  34                if (ce_stage(active_cache[i]) == 2)
  35                        return i;
  36                i++;
  37        }
  38        return -1;
  39}
  40
  41static void print_error_files(struct string_list *files_list,
  42                              const char *main_msg,
  43                              const char *hints_msg,
  44                              int *errs)
  45{
  46        if (files_list->nr) {
  47                int i;
  48                struct strbuf err_msg = STRBUF_INIT;
  49
  50                strbuf_addstr(&err_msg, main_msg);
  51                for (i = 0; i < files_list->nr; i++)
  52                        strbuf_addf(&err_msg,
  53                                    "\n    %s",
  54                                    files_list->items[i].string);
  55                if (advice_rm_hints)
  56                        strbuf_addstr(&err_msg, hints_msg);
  57                *errs = error("%s", err_msg.buf);
  58                strbuf_release(&err_msg);
  59        }
  60}
  61
  62static void error_removing_concrete_submodules(struct string_list *files, int *errs)
  63{
  64        print_error_files(files,
  65                          Q_("the following submodule (or one of its nested "
  66                             "submodules)\n"
  67                             "uses a .git directory:",
  68                             "the following submodules (or one of their nested "
  69                             "submodules)\n"
  70                             "use a .git directory:", files->nr),
  71                          _("\n(use 'rm -rf' if you really want to remove "
  72                            "it including all of its history)"),
  73                          errs);
  74        string_list_clear(files, 0);
  75}
  76
  77static int check_submodules_use_gitfiles(void)
  78{
  79        int i;
  80        int errs = 0;
  81        struct string_list files = STRING_LIST_INIT_NODUP;
  82
  83        for (i = 0; i < list.nr; i++) {
  84                const char *name = list.entry[i].name;
  85                int pos;
  86                const struct cache_entry *ce;
  87
  88                pos = cache_name_pos(name, strlen(name));
  89                if (pos < 0) {
  90                        pos = get_ours_cache_pos(name, pos);
  91                        if (pos < 0)
  92                                continue;
  93                }
  94                ce = active_cache[pos];
  95
  96                if (!S_ISGITLINK(ce->ce_mode) ||
  97                    !file_exists(ce->name) ||
  98                    is_empty_dir(name))
  99                        continue;
 100
 101                if (!submodule_uses_gitfile(name))
 102                        string_list_append(&files, name);
 103        }
 104
 105        error_removing_concrete_submodules(&files, &errs);
 106
 107        return errs;
 108}
 109
 110static int check_local_mod(unsigned char *head, int index_only)
 111{
 112        /*
 113         * Items in list are already sorted in the cache order,
 114         * so we could do this a lot more efficiently by using
 115         * tree_desc based traversal if we wanted to, but I am
 116         * lazy, and who cares if removal of files is a tad
 117         * slower than the theoretical maximum speed?
 118         */
 119        int i, no_head;
 120        int errs = 0;
 121        struct string_list files_staged = STRING_LIST_INIT_NODUP;
 122        struct string_list files_cached = STRING_LIST_INIT_NODUP;
 123        struct string_list files_submodule = STRING_LIST_INIT_NODUP;
 124        struct string_list files_local = STRING_LIST_INIT_NODUP;
 125
 126        no_head = is_null_sha1(head);
 127        for (i = 0; i < list.nr; i++) {
 128                struct stat st;
 129                int pos;
 130                const struct cache_entry *ce;
 131                const char *name = list.entry[i].name;
 132                unsigned char sha1[20];
 133                unsigned mode;
 134                int local_changes = 0;
 135                int staged_changes = 0;
 136
 137                pos = cache_name_pos(name, strlen(name));
 138                if (pos < 0) {
 139                        /*
 140                         * Skip unmerged entries except for populated submodules
 141                         * that could lose history when removed.
 142                         */
 143                        pos = get_ours_cache_pos(name, pos);
 144                        if (pos < 0)
 145                                continue;
 146
 147                        if (!S_ISGITLINK(active_cache[pos]->ce_mode) ||
 148                            is_empty_dir(name))
 149                                continue;
 150                }
 151                ce = active_cache[pos];
 152
 153                if (lstat(ce->name, &st) < 0) {
 154                        if (errno != ENOENT && errno != ENOTDIR)
 155                                warning_errno(_("failed to stat '%s'"), ce->name);
 156                        /* It already vanished from the working tree */
 157                        continue;
 158                }
 159                else if (S_ISDIR(st.st_mode)) {
 160                        /* if a file was removed and it is now a
 161                         * directory, that is the same as ENOENT as
 162                         * far as git is concerned; we do not track
 163                         * directories unless they are submodules.
 164                         */
 165                        if (!S_ISGITLINK(ce->ce_mode))
 166                                continue;
 167                }
 168
 169                /*
 170                 * "rm" of a path that has changes need to be treated
 171                 * carefully not to allow losing local changes
 172                 * accidentally.  A local change could be (1) file in
 173                 * work tree is different since the index; and/or (2)
 174                 * the user staged a content that is different from
 175                 * the current commit in the index.
 176                 *
 177                 * In such a case, you would need to --force the
 178                 * removal.  However, "rm --cached" (remove only from
 179                 * the index) is safe if the index matches the file in
 180                 * the work tree or the HEAD commit, as it means that
 181                 * the content being removed is available elsewhere.
 182                 */
 183
 184                /*
 185                 * Is the index different from the file in the work tree?
 186                 * If it's a submodule, is its work tree modified?
 187                 */
 188                if (ce_match_stat(ce, &st, 0) ||
 189                    (S_ISGITLINK(ce->ce_mode) &&
 190                     !ok_to_remove_submodule(ce->name)))
 191                        local_changes = 1;
 192
 193                /*
 194                 * Is the index different from the HEAD commit?  By
 195                 * definition, before the very initial commit,
 196                 * anything staged in the index is treated by the same
 197                 * way as changed from the HEAD.
 198                 */
 199                if (no_head
 200                     || get_tree_entry(head, name, sha1, &mode)
 201                     || ce->ce_mode != create_ce_mode(mode)
 202                     || hashcmp(ce->sha1, sha1))
 203                        staged_changes = 1;
 204
 205                /*
 206                 * If the index does not match the file in the work
 207                 * tree and if it does not match the HEAD commit
 208                 * either, (1) "git rm" without --cached definitely
 209                 * will lose information; (2) "git rm --cached" will
 210                 * lose information unless it is about removing an
 211                 * "intent to add" entry.
 212                 */
 213                if (local_changes && staged_changes) {
 214                        if (!index_only || !ce_intent_to_add(ce))
 215                                string_list_append(&files_staged, name);
 216                }
 217                else if (!index_only) {
 218                        if (staged_changes)
 219                                string_list_append(&files_cached, name);
 220                        if (local_changes) {
 221                                if (S_ISGITLINK(ce->ce_mode) &&
 222                                    !submodule_uses_gitfile(name))
 223                                        string_list_append(&files_submodule, name);
 224                                else
 225                                        string_list_append(&files_local, name);
 226                        }
 227                }
 228        }
 229        print_error_files(&files_staged,
 230                          Q_("the following file has staged content different "
 231                             "from both the\nfile and the HEAD:",
 232                             "the following files have staged content different"
 233                             " from both the\nfile and the HEAD:",
 234                             files_staged.nr),
 235                          _("\n(use -f to force removal)"),
 236                          &errs);
 237        string_list_clear(&files_staged, 0);
 238        print_error_files(&files_cached,
 239                          Q_("the following file has changes "
 240                             "staged in the index:",
 241                             "the following files have changes "
 242                             "staged in the index:", files_cached.nr),
 243                          _("\n(use --cached to keep the file,"
 244                            " or -f to force removal)"),
 245                          &errs);
 246        string_list_clear(&files_cached, 0);
 247
 248        error_removing_concrete_submodules(&files_submodule, &errs);
 249
 250        print_error_files(&files_local,
 251                          Q_("the following file has local modifications:",
 252                             "the following files have local modifications:",
 253                             files_local.nr),
 254                          _("\n(use --cached to keep the file,"
 255                            " or -f to force removal)"),
 256                          &errs);
 257        string_list_clear(&files_local, 0);
 258
 259        return errs;
 260}
 261
 262static struct lock_file lock_file;
 263
 264static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
 265static int ignore_unmatch = 0;
 266
 267static struct option builtin_rm_options[] = {
 268        OPT__DRY_RUN(&show_only, N_("dry run")),
 269        OPT__QUIET(&quiet, N_("do not list removed files")),
 270        OPT_BOOL( 0 , "cached",         &index_only, N_("only remove from the index")),
 271        OPT__FORCE(&force, N_("override the up-to-date check")),
 272        OPT_BOOL('r', NULL,             &recursive,  N_("allow recursive removal")),
 273        OPT_BOOL( 0 , "ignore-unmatch", &ignore_unmatch,
 274                                N_("exit with a zero status even if nothing matched")),
 275        OPT_END(),
 276};
 277
 278int cmd_rm(int argc, const char **argv, const char *prefix)
 279{
 280        int i;
 281        struct pathspec pathspec;
 282        char *seen;
 283
 284        gitmodules_config();
 285        git_config(git_default_config, NULL);
 286
 287        argc = parse_options(argc, argv, prefix, builtin_rm_options,
 288                             builtin_rm_usage, 0);
 289        if (!argc)
 290                usage_with_options(builtin_rm_usage, builtin_rm_options);
 291
 292        if (!index_only)
 293                setup_work_tree();
 294
 295        hold_locked_index(&lock_file, 1);
 296
 297        if (read_cache() < 0)
 298                die(_("index file corrupt"));
 299
 300        parse_pathspec(&pathspec, 0,
 301                       PATHSPEC_PREFER_CWD |
 302                       PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
 303                       prefix, argv);
 304        refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);
 305
 306        seen = xcalloc(pathspec.nr, 1);
 307
 308        for (i = 0; i < active_nr; i++) {
 309                const struct cache_entry *ce = active_cache[i];
 310                if (!ce_path_match(ce, &pathspec, seen))
 311                        continue;
 312                ALLOC_GROW(list.entry, list.nr + 1, list.alloc);
 313                list.entry[list.nr].name = xstrdup(ce->name);
 314                list.entry[list.nr].is_submodule = S_ISGITLINK(ce->ce_mode);
 315                if (list.entry[list.nr++].is_submodule &&
 316                    !is_staging_gitmodules_ok())
 317                        die (_("Please stage your changes to .gitmodules or stash them to proceed"));
 318        }
 319
 320        if (pathspec.nr) {
 321                const char *original;
 322                int seen_any = 0;
 323                for (i = 0; i < pathspec.nr; i++) {
 324                        original = pathspec.items[i].original;
 325                        if (!seen[i]) {
 326                                if (!ignore_unmatch) {
 327                                        die(_("pathspec '%s' did not match any files"),
 328                                            original);
 329                                }
 330                        }
 331                        else {
 332                                seen_any = 1;
 333                        }
 334                        if (!recursive && seen[i] == MATCHED_RECURSIVELY)
 335                                die(_("not removing '%s' recursively without -r"),
 336                                    *original ? original : ".");
 337                }
 338
 339                if (!seen_any)
 340                        exit(0);
 341        }
 342
 343        /*
 344         * If not forced, the file, the index and the HEAD (if exists)
 345         * must match; but the file can already been removed, since
 346         * this sequence is a natural "novice" way:
 347         *
 348         *      rm F; git rm F
 349         *
 350         * Further, if HEAD commit exists, "diff-index --cached" must
 351         * report no changes unless forced.
 352         */
 353        if (!force) {
 354                unsigned char sha1[20];
 355                if (get_sha1("HEAD", sha1))
 356                        hashclr(sha1);
 357                if (check_local_mod(sha1, index_only))
 358                        exit(1);
 359        } else if (!index_only) {
 360                if (check_submodules_use_gitfiles())
 361                        exit(1);
 362        }
 363
 364        /*
 365         * First remove the names from the index: we won't commit
 366         * the index unless all of them succeed.
 367         */
 368        for (i = 0; i < list.nr; i++) {
 369                const char *path = list.entry[i].name;
 370                if (!quiet)
 371                        printf("rm '%s'\n", path);
 372
 373                if (remove_file_from_cache(path))
 374                        die(_("git rm: unable to remove %s"), path);
 375        }
 376
 377        if (show_only)
 378                return 0;
 379
 380        /*
 381         * Then, unless we used "--cached", remove the filenames from
 382         * the workspace. If we fail to remove the first one, we
 383         * abort the "git rm" (but once we've successfully removed
 384         * any file at all, we'll go ahead and commit to it all:
 385         * by then we've already committed ourselves and can't fail
 386         * in the middle)
 387         */
 388        if (!index_only) {
 389                int removed = 0, gitmodules_modified = 0;
 390                struct strbuf buf = STRBUF_INIT;
 391                for (i = 0; i < list.nr; i++) {
 392                        const char *path = list.entry[i].name;
 393                        if (list.entry[i].is_submodule) {
 394                                if (is_empty_dir(path)) {
 395                                        if (!rmdir(path)) {
 396                                                removed = 1;
 397                                                if (!remove_path_from_gitmodules(path))
 398                                                        gitmodules_modified = 1;
 399                                                continue;
 400                                        }
 401                                } else {
 402                                        strbuf_reset(&buf);
 403                                        strbuf_addstr(&buf, path);
 404                                        if (!remove_dir_recursively(&buf, 0)) {
 405                                                removed = 1;
 406                                                if (!remove_path_from_gitmodules(path))
 407                                                        gitmodules_modified = 1;
 408                                                strbuf_release(&buf);
 409                                                continue;
 410                                        } else if (!file_exists(path))
 411                                                /* Submodule was removed by user */
 412                                                if (!remove_path_from_gitmodules(path))
 413                                                        gitmodules_modified = 1;
 414                                        /* Fallthrough and let remove_path() fail. */
 415                                }
 416                        }
 417                        if (!remove_path(path)) {
 418                                removed = 1;
 419                                continue;
 420                        }
 421                        if (!removed)
 422                                die_errno("git rm: '%s'", path);
 423                }
 424                strbuf_release(&buf);
 425                if (gitmodules_modified)
 426                        stage_updated_gitmodules();
 427        }
 428
 429        if (active_cache_changed) {
 430                if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 431                        die(_("Unable to write new index file"));
 432        }
 433
 434        return 0;
 435}