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