Andrew's git / gitweb.git / builtin/rm.c
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builtin / rm.con commit merge-file: clamp exit code to maximum 127 (e34f802)
   1/*
   2 * "git rm" builtin command
   3 *
   4 * Copyright (C) Linus Torvalds 2006
   5 */
   6#include "cache.h"
   7#include "builtin.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 its 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                struct stat st;
  88
  89                pos = cache_name_pos(name, strlen(name));
  90                if (pos < 0) {
  91                        pos = get_ours_cache_pos(name, pos);
  92                        if (pos < 0)
  93                                continue;
  94                }
  95                ce = active_cache[pos];
  96
  97                if (!S_ISGITLINK(ce->ce_mode) ||
  98                    (lstat(ce->name, &st) < 0) ||
  99                    is_empty_dir(name))
 100                        continue;
 101
 102                if (!submodule_uses_gitfile(name))
 103                        string_list_append(&files, name);
 104        }
 105
 106        error_removing_concrete_submodules(&files, &errs);
 107
 108        return errs;
 109}
 110
 111static int check_local_mod(unsigned char *head, int index_only)
 112{
 113        /*
 114         * Items in list are already sorted in the cache order,
 115         * so we could do this a lot more efficiently by using
 116         * tree_desc based traversal if we wanted to, but I am
 117         * lazy, and who cares if removal of files is a tad
 118         * slower than the theoretical maximum speed?
 119         */
 120        int i, no_head;
 121        int errs = 0;
 122        struct string_list files_staged = STRING_LIST_INIT_NODUP;
 123        struct string_list files_cached = STRING_LIST_INIT_NODUP;
 124        struct string_list files_submodule = STRING_LIST_INIT_NODUP;
 125        struct string_list files_local = STRING_LIST_INIT_NODUP;
 126
 127        no_head = is_null_sha1(head);
 128        for (i = 0; i < list.nr; i++) {
 129                struct stat st;
 130                int pos;
 131                const struct cache_entry *ce;
 132                const char *name = list.entry[i].name;
 133                unsigned char sha1[20];
 134                unsigned mode;
 135                int local_changes = 0;
 136                int staged_changes = 0;
 137
 138                pos = cache_name_pos(name, strlen(name));
 139                if (pos < 0) {
 140                        /*
 141                         * Skip unmerged entries except for populated submodules
 142                         * that could lose history when removed.
 143                         */
 144                        pos = get_ours_cache_pos(name, pos);
 145                        if (pos < 0)
 146                                continue;
 147
 148                        if (!S_ISGITLINK(active_cache[pos]->ce_mode) ||
 149                            is_empty_dir(name))
 150                                continue;
 151                }
 152                ce = active_cache[pos];
 153
 154                if (lstat(ce->name, &st) < 0) {
 155                        if (errno != ENOENT && errno != ENOTDIR)
 156                                warning("'%s': %s", ce->name, strerror(errno));
 157                        /* It already vanished from the working tree */
 158                        continue;
 159                }
 160                else if (S_ISDIR(st.st_mode)) {
 161                        /* if a file was removed and it is now a
 162                         * directory, that is the same as ENOENT as
 163                         * far as git is concerned; we do not track
 164                         * directories unless they are submodules.
 165                         */
 166                        if (!S_ISGITLINK(ce->ce_mode))
 167                                continue;
 168                }
 169
 170                /*
 171                 * "rm" of a path that has changes need to be treated
 172                 * carefully not to allow losing local changes
 173                 * accidentally.  A local change could be (1) file in
 174                 * work tree is different since the index; and/or (2)
 175                 * the user staged a content that is different from
 176                 * the current commit in the index.
 177                 *
 178                 * In such a case, you would need to --force the
 179                 * removal.  However, "rm --cached" (remove only from
 180                 * the index) is safe if the index matches the file in
 181                 * the work tree or the HEAD commit, as it means that
 182                 * the content being removed is available elsewhere.
 183                 */
 184
 185                /*
 186                 * Is the index different from the file in the work tree?
 187                 * If it's a submodule, is its work tree modified?
 188                 */
 189                if (ce_match_stat(ce, &st, 0) ||
 190                    (S_ISGITLINK(ce->ce_mode) &&
 191                     !ok_to_remove_submodule(ce->name)))
 192                        local_changes = 1;
 193
 194                /*
 195                 * Is the index different from the HEAD commit?  By
 196                 * definition, before the very initial commit,
 197                 * anything staged in the index is treated by the same
 198                 * way as changed from the HEAD.
 199                 */
 200                if (no_head
 201                     || get_tree_entry(head, name, sha1, &mode)
 202                     || ce->ce_mode != create_ce_mode(mode)
 203                     || hashcmp(ce->sha1, sha1))
 204                        staged_changes = 1;
 205
 206                /*
 207                 * If the index does not match the file in the work
 208                 * tree and if it does not match the HEAD commit
 209                 * either, (1) "git rm" without --cached definitely
 210                 * will lose information; (2) "git rm --cached" will
 211                 * lose information unless it is about removing an
 212                 * "intent to add" entry.
 213                 */
 214                if (local_changes && staged_changes) {
 215                        if (!index_only || !(ce->ce_flags & CE_INTENT_TO_ADD))
 216                                string_list_append(&files_staged, name);
 217                }
 218                else if (!index_only) {
 219                        if (staged_changes)
 220                                string_list_append(&files_cached, name);
 221                        if (local_changes) {
 222                                if (S_ISGITLINK(ce->ce_mode) &&
 223                                    !submodule_uses_gitfile(name))
 224                                        string_list_append(&files_submodule, name);
 225                                else
 226                                        string_list_append(&files_local, name);
 227                        }
 228                }
 229        }
 230        print_error_files(&files_staged,
 231                          Q_("the following file has staged content different "
 232                             "from both the\nfile and the HEAD:",
 233                             "the following files have staged content different"
 234                             " from both the\nfile and the HEAD:",
 235                             files_staged.nr),
 236                          _("\n(use -f to force removal)"),
 237                          &errs);
 238        string_list_clear(&files_staged, 0);
 239        print_error_files(&files_cached,
 240                          Q_("the following file has changes "
 241                             "staged in the index:",
 242                             "the following files have changes "
 243                             "staged in the index:", files_cached.nr),
 244                          _("\n(use --cached to keep the file,"
 245                            " or -f to force removal)"),
 246                          &errs);
 247        string_list_clear(&files_cached, 0);
 248
 249        error_removing_concrete_submodules(&files_submodule, &errs);
 250
 251        print_error_files(&files_local,
 252                          Q_("the following file has local modifications:",
 253                             "the following files have local modifications:",
 254                             files_local.nr),
 255                          _("\n(use --cached to keep the file,"
 256                            " or -f to force removal)"),
 257                          &errs);
 258        string_list_clear(&files_local, 0);
 259
 260        return errs;
 261}
 262
 263static struct lock_file lock_file;
 264
 265static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
 266static int ignore_unmatch = 0;
 267
 268static struct option builtin_rm_options[] = {
 269        OPT__DRY_RUN(&show_only, N_("dry run")),
 270        OPT__QUIET(&quiet, N_("do not list removed files")),
 271        OPT_BOOL( 0 , "cached",         &index_only, N_("only remove from the index")),
 272        OPT__FORCE(&force, N_("override the up-to-date check")),
 273        OPT_BOOL('r', NULL,             &recursive,  N_("allow recursive removal")),
 274        OPT_BOOL( 0 , "ignore-unmatch", &ignore_unmatch,
 275                                N_("exit with a zero status even if nothing matched")),
 276        OPT_END(),
 277};
 278
 279int cmd_rm(int argc, const char **argv, const char *prefix)
 280{
 281        int i, newfd;
 282        struct pathspec pathspec;
 283        char *seen;
 284
 285        gitmodules_config();
 286        git_config(git_default_config, NULL);
 287
 288        argc = parse_options(argc, argv, prefix, builtin_rm_options,
 289                             builtin_rm_usage, 0);
 290        if (!argc)
 291                usage_with_options(builtin_rm_usage, builtin_rm_options);
 292
 293        if (!index_only)
 294                setup_work_tree();
 295
 296        newfd = hold_locked_index(&lock_file, 1);
 297
 298        if (read_cache() < 0)
 299                die(_("index file corrupt"));
 300
 301        parse_pathspec(&pathspec, 0,
 302                       PATHSPEC_PREFER_CWD |
 303                       PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
 304                       prefix, argv);
 305        refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);
 306
 307        seen = xcalloc(pathspec.nr, 1);
 308
 309        for (i = 0; i < active_nr; i++) {
 310                const struct cache_entry *ce = active_cache[i];
 311                if (!ce_path_match(ce, &pathspec, seen))
 312                        continue;
 313                ALLOC_GROW(list.entry, list.nr + 1, list.alloc);
 314                list.entry[list.nr].name = xstrdup(ce->name);
 315                list.entry[list.nr].is_submodule = S_ISGITLINK(ce->ce_mode);
 316                if (list.entry[list.nr++].is_submodule &&
 317                    !is_staging_gitmodules_ok())
 318                        die (_("Please, stage your changes to .gitmodules or stash them to proceed"));
 319        }
 320
 321        if (pathspec.nr) {
 322                const char *original;
 323                int seen_any = 0;
 324                for (i = 0; i < pathspec.nr; i++) {
 325                        original = pathspec.items[i].original;
 326                        if (!seen[i]) {
 327                                if (!ignore_unmatch) {
 328                                        die(_("pathspec '%s' did not match any files"),
 329                                            original);
 330                                }
 331                        }
 332                        else {
 333                                seen_any = 1;
 334                        }
 335                        if (!recursive && seen[i] == MATCHED_RECURSIVELY)
 336                                die(_("not removing '%s' recursively without -r"),
 337                                    *original ? original : ".");
 338                }
 339
 340                if (!seen_any)
 341                        exit(0);
 342        }
 343
 344        /*
 345         * If not forced, the file, the index and the HEAD (if exists)
 346         * must match; but the file can already been removed, since
 347         * this sequence is a natural "novice" way:
 348         *
 349         *      rm F; git rm F
 350         *
 351         * Further, if HEAD commit exists, "diff-index --cached" must
 352         * report no changes unless forced.
 353         */
 354        if (!force) {
 355                unsigned char sha1[20];
 356                if (get_sha1("HEAD", sha1))
 357                        hashclr(sha1);
 358                if (check_local_mod(sha1, index_only))
 359                        exit(1);
 360        } else if (!index_only) {
 361                if (check_submodules_use_gitfiles())
 362                        exit(1);
 363        }
 364
 365        /*
 366         * First remove the names from the index: we won't commit
 367         * the index unless all of them succeed.
 368         */
 369        for (i = 0; i < list.nr; i++) {
 370                const char *path = list.entry[i].name;
 371                if (!quiet)
 372                        printf("rm '%s'\n", path);
 373
 374                if (remove_file_from_cache(path))
 375                        die(_("git rm: unable to remove %s"), path);
 376        }
 377
 378        if (show_only)
 379                return 0;
 380
 381        /*
 382         * Then, unless we used "--cached", remove the filenames from
 383         * the workspace. If we fail to remove the first one, we
 384         * abort the "git rm" (but once we've successfully removed
 385         * any file at all, we'll go ahead and commit to it all:
 386         * by then we've already committed ourselves and can't fail
 387         * in the middle)
 388         */
 389        if (!index_only) {
 390                int removed = 0, gitmodules_modified = 0;
 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                                        struct strbuf buf = STRBUF_INIT;
 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                                        strbuf_release(&buf);
 415                                        /* Fallthrough and let remove_path() fail. */
 416                                }
 417                        }
 418                        if (!remove_path(path)) {
 419                                removed = 1;
 420                                continue;
 421                        }
 422                        if (!removed)
 423                                die_errno("git rm: '%s'", path);
 424                }
 425                if (gitmodules_modified)
 426                        stage_updated_gitmodules();
 427        }
 428
 429        if (active_cache_changed) {
 430                if (write_cache(newfd, active_cache, active_nr) ||
 431                    commit_locked_index(&lock_file))
 432                        die(_("Unable to write new index file"));
 433        }
 434
 435        return 0;
 436}