Merge branch 'rs/strbuf-cocci-workaround'
[git/git.git] / builtin / rm.c
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
17 static const char * const builtin_rm_usage[] = {
18 N_("git rm [<options>] [--] <file>..."),
19 NULL
20 };
21
22 static struct {
23 int nr, alloc;
24 struct {
25 const char *name;
26 char is_submodule;
27 } *entry;
28 } list;
29
30 static 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
42 static 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
63 static 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
90 static 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
236 static struct lock_file lock_file;
237
238 static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
239 static int ignore_unmatch = 0;
240
241 static 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
252 int cmd_rm(int argc, const char **argv, const char *prefix)
253 {
254 int i;
255 struct pathspec pathspec;
256 char *seen;
257
258 git_config(git_default_config, NULL);
259
260 argc = parse_options(argc, argv, prefix, builtin_rm_options,
261 builtin_rm_usage, 0);
262 if (!argc)
263 usage_with_options(builtin_rm_usage, builtin_rm_options);
264
265 if (!index_only)
266 setup_work_tree();
267
268 hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
269
270 if (read_cache() < 0)
271 die(_("index file corrupt"));
272
273 parse_pathspec(&pathspec, 0,
274 PATHSPEC_PREFER_CWD,
275 prefix, argv);
276 refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);
277
278 seen = xcalloc(pathspec.nr, 1);
279
280 for (i = 0; i < active_nr; i++) {
281 const struct cache_entry *ce = active_cache[i];
282 if (!ce_path_match(ce, &pathspec, seen))
283 continue;
284 ALLOC_GROW(list.entry, list.nr + 1, list.alloc);
285 list.entry[list.nr].name = xstrdup(ce->name);
286 list.entry[list.nr].is_submodule = S_ISGITLINK(ce->ce_mode);
287 if (list.entry[list.nr++].is_submodule &&
288 !is_staging_gitmodules_ok(&the_index))
289 die (_("Please stage your changes to .gitmodules or stash them to proceed"));
290 }
291
292 if (pathspec.nr) {
293 const char *original;
294 int seen_any = 0;
295 for (i = 0; i < pathspec.nr; i++) {
296 original = pathspec.items[i].original;
297 if (!seen[i]) {
298 if (!ignore_unmatch) {
299 die(_("pathspec '%s' did not match any files"),
300 original);
301 }
302 }
303 else {
304 seen_any = 1;
305 }
306 if (!recursive && seen[i] == MATCHED_RECURSIVELY)
307 die(_("not removing '%s' recursively without -r"),
308 *original ? original : ".");
309 }
310
311 if (!seen_any)
312 exit(0);
313 }
314
315 if (!index_only)
316 submodules_absorb_gitdir_if_needed(prefix);
317
318 /*
319 * If not forced, the file, the index and the HEAD (if exists)
320 * must match; but the file can already been removed, since
321 * this sequence is a natural "novice" way:
322 *
323 * rm F; git rm F
324 *
325 * Further, if HEAD commit exists, "diff-index --cached" must
326 * report no changes unless forced.
327 */
328 if (!force) {
329 struct object_id oid;
330 if (get_oid("HEAD", &oid))
331 oidclr(&oid);
332 if (check_local_mod(&oid, index_only))
333 exit(1);
334 }
335
336 /*
337 * First remove the names from the index: we won't commit
338 * the index unless all of them succeed.
339 */
340 for (i = 0; i < list.nr; i++) {
341 const char *path = list.entry[i].name;
342 if (!quiet)
343 printf("rm '%s'\n", path);
344
345 if (remove_file_from_cache(path))
346 die(_("git rm: unable to remove %s"), path);
347 }
348
349 if (show_only)
350 return 0;
351
352 /*
353 * Then, unless we used "--cached", remove the filenames from
354 * the workspace. If we fail to remove the first one, we
355 * abort the "git rm" (but once we've successfully removed
356 * any file at all, we'll go ahead and commit to it all:
357 * by then we've already committed ourselves and can't fail
358 * in the middle)
359 */
360 if (!index_only) {
361 int removed = 0, gitmodules_modified = 0;
362 struct strbuf buf = STRBUF_INIT;
363 for (i = 0; i < list.nr; i++) {
364 const char *path = list.entry[i].name;
365 if (list.entry[i].is_submodule) {
366 strbuf_reset(&buf);
367 strbuf_addstr(&buf, path);
368 if (remove_dir_recursively(&buf, 0))
369 die(_("could not remove '%s'"), path);
370
371 removed = 1;
372 if (!remove_path_from_gitmodules(path))
373 gitmodules_modified = 1;
374 continue;
375 }
376 if (!remove_path(path)) {
377 removed = 1;
378 continue;
379 }
380 if (!removed)
381 die_errno("git rm: '%s'", path);
382 }
383 strbuf_release(&buf);
384 if (gitmodules_modified)
385 stage_updated_gitmodules(&the_index);
386 }
387
388 if (active_cache_changed) {
389 if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
390 die(_("Unable to write new index file"));
391 }
392
393 return 0;
394 }