summaryrefslogtreecommitdiff
path: root/builtin/rm.c
blob: 3304bff42a2fb91f66b9bbca1117746eaa22352a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
/*
 * "git rm" builtin command
 *
 * Copyright (C) Linus Torvalds 2006
 */
#include "builtin.h"
#include "lockfile.h"
#include "dir.h"
#include "cache-tree.h"
#include "tree-walk.h"
#include "parse-options.h"
#include "string-list.h"
#include "submodule.h"
#include "pathspec.h"

static const char * const builtin_rm_usage[] = {
	N_("git rm [<options>] [--] <file>..."),
	NULL
};

static struct {
	int nr, alloc;
	struct {
		const char *name;
		char is_submodule;
	} *entry;
} list;

static int get_ours_cache_pos(const char *path, int pos)
{
	int i = -pos - 1;

	while ((i < active_nr) && !strcmp(active_cache[i]->name, path)) {
		if (ce_stage(active_cache[i]) == 2)
			return i;
		i++;
	}
	return -1;
}

static void print_error_files(struct string_list *files_list,
			      const char *main_msg,
			      const char *hints_msg,
			      int *errs)
{
	if (files_list->nr) {
		int i;
		struct strbuf err_msg = STRBUF_INIT;

		strbuf_addstr(&err_msg, main_msg);
		for (i = 0; i < files_list->nr; i++)
			strbuf_addf(&err_msg,
				    "\n    %s",
				    files_list->items[i].string);
		if (advice_rm_hints)
			strbuf_addstr(&err_msg, hints_msg);
		*errs = error("%s", err_msg.buf);
		strbuf_release(&err_msg);
	}
}

static void error_removing_concrete_submodules(struct string_list *files, int *errs)
{
	print_error_files(files,
			  Q_("the following submodule (or one of its nested "
			     "submodules)\n"
			     "uses a .git directory:",
			     "the following submodules (or one of their nested "
			     "submodules)\n"
			     "use a .git directory:", files->nr),
			  _("\n(use 'rm -rf' if you really want to remove "
			    "it including all of its history)"),
			  errs);
	string_list_clear(files, 0);
}

static int check_submodules_use_gitfiles(void)
{
	int i;
	int errs = 0;
	struct string_list files = STRING_LIST_INIT_NODUP;

	for (i = 0; i < list.nr; i++) {
		const char *name = list.entry[i].name;
		int pos;
		const struct cache_entry *ce;
		struct stat st;

		pos = cache_name_pos(name, strlen(name));
		if (pos < 0) {
			pos = get_ours_cache_pos(name, pos);
			if (pos < 0)
				continue;
		}
		ce = active_cache[pos];

		if (!S_ISGITLINK(ce->ce_mode) ||
		    (lstat(ce->name, &st) < 0) ||
		    is_empty_dir(name))
			continue;

		if (!submodule_uses_gitfile(name))
			string_list_append(&files, name);
	}

	error_removing_concrete_submodules(&files, &errs);

	return errs;
}

static int check_local_mod(unsigned char *head, int index_only)
{
	/*
	 * Items in list are already sorted in the cache order,
	 * so we could do this a lot more efficiently by using
	 * tree_desc based traversal if we wanted to, but I am
	 * lazy, and who cares if removal of files is a tad
	 * slower than the theoretical maximum speed?
	 */
	int i, no_head;
	int errs = 0;
	struct string_list files_staged = STRING_LIST_INIT_NODUP;
	struct string_list files_cached = STRING_LIST_INIT_NODUP;
	struct string_list files_submodule = STRING_LIST_INIT_NODUP;
	struct string_list files_local = STRING_LIST_INIT_NODUP;

	no_head = is_null_sha1(head);
	for (i = 0; i < list.nr; i++) {
		struct stat st;
		int pos;
		const struct cache_entry *ce;
		const char *name = list.entry[i].name;
		unsigned char sha1[20];
		unsigned mode;
		int local_changes = 0;
		int staged_changes = 0;

		pos = cache_name_pos(name, strlen(name));
		if (pos < 0) {
			/*
			 * Skip unmerged entries except for populated submodules
			 * that could lose history when removed.
			 */
			pos = get_ours_cache_pos(name, pos);
			if (pos < 0)
				continue;

			if (!S_ISGITLINK(active_cache[pos]->ce_mode) ||
			    is_empty_dir(name))
				continue;
		}
		ce = active_cache[pos];

		if (lstat(ce->name, &st) < 0) {
			if (errno != ENOENT && errno != ENOTDIR)
				warning("'%s': %s", ce->name, strerror(errno));
			/* It already vanished from the working tree */
			continue;
		}
		else if (S_ISDIR(st.st_mode)) {
			/* if a file was removed and it is now a
			 * directory, that is the same as ENOENT as
			 * far as git is concerned; we do not track
			 * directories unless they are submodules.
			 */
			if (!S_ISGITLINK(ce->ce_mode))
				continue;
		}

		/*
		 * "rm" of a path that has changes need to be treated
		 * carefully not to allow losing local changes
		 * accidentally.  A local change could be (1) file in
		 * work tree is different since the index; and/or (2)
		 * the user staged a content that is different from
		 * the current commit in the index.
		 *
		 * In such a case, you would need to --force the
		 * removal.  However, "rm --cached" (remove only from
		 * the index) is safe if the index matches the file in
		 * the work tree or the HEAD commit, as it means that
		 * the content being removed is available elsewhere.
		 */

		/*
		 * Is the index different from the file in the work tree?
		 * If it's a submodule, is its work tree modified?
		 */
		if (ce_match_stat(ce, &st, 0) ||
		    (S_ISGITLINK(ce->ce_mode) &&
		     !ok_to_remove_submodule(ce->name)))
			local_changes = 1;

		/*
		 * Is the index different from the HEAD commit?  By
		 * definition, before the very initial commit,
		 * anything staged in the index is treated by the same
		 * way as changed from the HEAD.
		 */
		if (no_head
		     || get_tree_entry(head, name, sha1, &mode)
		     || ce->ce_mode != create_ce_mode(mode)
		     || hashcmp(ce->sha1, sha1))
			staged_changes = 1;

		/*
		 * If the index does not match the file in the work
		 * tree and if it does not match the HEAD commit
		 * either, (1) "git rm" without --cached definitely
		 * will lose information; (2) "git rm --cached" will
		 * lose information unless it is about removing an
		 * "intent to add" entry.
		 */
		if (local_changes && staged_changes) {
			if (!index_only || !(ce->ce_flags & CE_INTENT_TO_ADD))
				string_list_append(&files_staged, name);
		}
		else if (!index_only) {
			if (staged_changes)
				string_list_append(&files_cached, name);
			if (local_changes) {
				if (S_ISGITLINK(ce->ce_mode) &&
				    !submodule_uses_gitfile(name))
					string_list_append(&files_submodule, name);
				else
					string_list_append(&files_local, name);
			}
		}
	}
	print_error_files(&files_staged,
			  Q_("the following file has staged content different "
			     "from both the\nfile and the HEAD:",
			     "the following files have staged content different"
			     " from both the\nfile and the HEAD:",
			     files_staged.nr),
			  _("\n(use -f to force removal)"),
			  &errs);
	string_list_clear(&files_staged, 0);
	print_error_files(&files_cached,
			  Q_("the following file has changes "
			     "staged in the index:",
			     "the following files have changes "
			     "staged in the index:", files_cached.nr),
			  _("\n(use --cached to keep the file,"
			    " or -f to force removal)"),
			  &errs);
	string_list_clear(&files_cached, 0);

	error_removing_concrete_submodules(&files_submodule, &errs);

	print_error_files(&files_local,
			  Q_("the following file has local modifications:",
			     "the following files have local modifications:",
			     files_local.nr),
			  _("\n(use --cached to keep the file,"
			    " or -f to force removal)"),
			  &errs);
	string_list_clear(&files_local, 0);

	return errs;
}

static struct lock_file lock_file;

static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
static int ignore_unmatch = 0;

static struct option builtin_rm_options[] = {
	OPT__DRY_RUN(&show_only, N_("dry run")),
	OPT__QUIET(&quiet, N_("do not list removed files")),
	OPT_BOOL( 0 , "cached",         &index_only, N_("only remove from the index")),
	OPT__FORCE(&force, N_("override the up-to-date check")),
	OPT_BOOL('r', NULL,             &recursive,  N_("allow recursive removal")),
	OPT_BOOL( 0 , "ignore-unmatch", &ignore_unmatch,
				N_("exit with a zero status even if nothing matched")),
	OPT_END(),
};

int cmd_rm(int argc, const char **argv, const char *prefix)
{
	int i;
	struct pathspec pathspec;
	char *seen;

	gitmodules_config();
	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, prefix, builtin_rm_options,
			     builtin_rm_usage, 0);
	if (!argc)
		usage_with_options(builtin_rm_usage, builtin_rm_options);

	if (!index_only)
		setup_work_tree();

	hold_locked_index(&lock_file, 1);

	if (read_cache() < 0)
		die(_("index file corrupt"));

	parse_pathspec(&pathspec, 0,
		       PATHSPEC_PREFER_CWD |
		       PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
		       prefix, argv);
	refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);

	seen = xcalloc(pathspec.nr, 1);

	for (i = 0; i < active_nr; i++) {
		const struct cache_entry *ce = active_cache[i];
		if (!ce_path_match(ce, &pathspec, seen))
			continue;
		ALLOC_GROW(list.entry, list.nr + 1, list.alloc);
		list.entry[list.nr].name = xstrdup(ce->name);
		list.entry[list.nr].is_submodule = S_ISGITLINK(ce->ce_mode);
		if (list.entry[list.nr++].is_submodule &&
		    !is_staging_gitmodules_ok())
			die (_("Please, stage your changes to .gitmodules or stash them to proceed"));
	}

	if (pathspec.nr) {
		const char *original;
		int seen_any = 0;
		for (i = 0; i < pathspec.nr; i++) {
			original = pathspec.items[i].original;
			if (!seen[i]) {
				if (!ignore_unmatch) {
					die(_("pathspec '%s' did not match any files"),
					    original);
				}
			}
			else {
				seen_any = 1;
			}
			if (!recursive && seen[i] == MATCHED_RECURSIVELY)
				die(_("not removing '%s' recursively without -r"),
				    *original ? original : ".");
		}

		if (!seen_any)
			exit(0);
	}

	/*
	 * If not forced, the file, the index and the HEAD (if exists)
	 * must match; but the file can already been removed, since
	 * this sequence is a natural "novice" way:
	 *
	 *	rm F; git rm F
	 *
	 * Further, if HEAD commit exists, "diff-index --cached" must
	 * report no changes unless forced.
	 */
	if (!force) {
		unsigned char sha1[20];
		if (get_sha1("HEAD", sha1))
			hashclr(sha1);
		if (check_local_mod(sha1, index_only))
			exit(1);
	} else if (!index_only) {
		if (check_submodules_use_gitfiles())
			exit(1);
	}

	/*
	 * First remove the names from the index: we won't commit
	 * the index unless all of them succeed.
	 */
	for (i = 0; i < list.nr; i++) {
		const char *path = list.entry[i].name;
		if (!quiet)
			printf("rm '%s'\n", path);

		if (remove_file_from_cache(path))
			die(_("git rm: unable to remove %s"), path);
	}

	if (show_only)
		return 0;

	/*
	 * Then, unless we used "--cached", remove the filenames from
	 * the workspace. If we fail to remove the first one, we
	 * abort the "git rm" (but once we've successfully removed
	 * any file at all, we'll go ahead and commit to it all:
	 * by then we've already committed ourselves and can't fail
	 * in the middle)
	 */
	if (!index_only) {
		int removed = 0, gitmodules_modified = 0;
		for (i = 0; i < list.nr; i++) {
			const char *path = list.entry[i].name;
			if (list.entry[i].is_submodule) {
				if (is_empty_dir(path)) {
					if (!rmdir(path)) {
						removed = 1;
						if (!remove_path_from_gitmodules(path))
							gitmodules_modified = 1;
						continue;
					}
				} else {
					struct strbuf buf = STRBUF_INIT;
					strbuf_addstr(&buf, path);
					if (!remove_dir_recursively(&buf, 0)) {
						removed = 1;
						if (!remove_path_from_gitmodules(path))
							gitmodules_modified = 1;
						strbuf_release(&buf);
						continue;
					} else if (!file_exists(path))
						/* Submodule was removed by user */
						if (!remove_path_from_gitmodules(path))
							gitmodules_modified = 1;
					strbuf_release(&buf);
					/* Fallthrough and let remove_path() fail. */
				}
			}
			if (!remove_path(path)) {
				removed = 1;
				continue;
			}
			if (!removed)
				die_errno("git rm: '%s'", path);
		}
		if (gitmodules_modified)
			stage_updated_gitmodules();
	}

	if (active_cache_changed) {
		if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
			die(_("Unable to write new index file"));
	}

	return 0;
}