summaryrefslogtreecommitdiff
path: root/builtin-rm.c
blob: f3772c84de0a1f1a18123e55ae6e6983739f590b (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
/*
 * "git rm" builtin command
 *
 * Copyright (C) Linus Torvalds 2006
 */
#include "cache.h"
#include "builtin.h"
#include "dir.h"
#include "cache-tree.h"
#include "tree-walk.h"
#include "parse-options.h"
 
static const char * const builtin_rm_usage[] = {
	"git rm [options] [--] <file>...",
	NULL
};
 
static struct {
	int nr, alloc;
	const char **name;
} list;
 
static void add_list(const char *name)
{
	if (list.nr >= list.alloc) {
		list.alloc = alloc_nr(list.alloc);
		list.name = xrealloc(list.name, list.alloc * sizeof(const char *));
	}
	list.name[list.nr++] = name;
}
 
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;
 
	no_head = is_null_sha1(head);
	for (i = 0; i < list.nr; i++) {
		struct stat st;
		int pos;
		struct cache_entry *ce;
		const char *name = list.name[i];
		unsigned char sha1[20];
		unsigned mode;
		int local_changes = 0;
		int staged_changes = 0;
 
		pos = cache_name_pos(name, strlen(name));
		if (pos < 0)
			continue; /* removing unmerged entry */
		ce = active_cache[pos];
 
		if (lstat(ce->name, &st) < 0) {
			if (errno != ENOENT)
				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.
			 */
			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 (ce_match_stat(ce, &st, 0))
			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))
				errs = error("'%s' has staged content different "
					     "from both the file and the HEAD\n"
					     "(use -f to force removal)", name);
		}
		else if (!index_only) {
			if (staged_changes)
				errs = error("'%s' has changes staged in the index\n"
					     "(use --cached to keep the file, "
					     "or -f to force removal)", name);
			if (local_changes)
				errs = error("'%s' has local modifications\n"
					     "(use --cached to keep the file, "
					     "or -f to force removal)", name);
		}
	}
	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),
	OPT__QUIET(&quiet),
	OPT_BOOLEAN( 0 , "cached",         &index_only, "only remove from the index"),
	OPT_BOOLEAN('f', "force",          &force,      "override the up-to-date check"),
	OPT_BOOLEAN('r', NULL,             &recursive,  "allow recursive removal"),
	OPT_BOOLEAN( 0 , "ignore-unmatch", &ignore_unmatch,
				"exit with a zero status even if nothing matched"),
	OPT_END(),
};
 
int cmd_rm(int argc, const char **argv, const char *prefix)
{
	int i, newfd;
	const char **pathspec;
	char *seen;
 
	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();
 
	newfd = hold_locked_index(&lock_file, 1);
 
	if (read_cache() < 0)
		die("index file corrupt");
 
	pathspec = get_pathspec(prefix, argv);
	refresh_index(&the_index, REFRESH_QUIET, pathspec, NULL, NULL);
 
	seen = NULL;
	for (i = 0; pathspec[i] ; i++)
		/* nothing */;
	seen = xcalloc(i, 1);
 
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
			continue;
		add_list(ce->name);
	}
 
	if (pathspec) {
		const char *match;
		int seen_any = 0;
		for (i = 0; (match = pathspec[i]) != NULL ; i++) {
			if (!seen[i]) {
				if (!ignore_unmatch) {
					die("pathspec '%s' did not match any files",
					    match);
				}
			}
			else {
				seen_any = 1;
			}
			if (!recursive && seen[i] == MATCHED_RECURSIVELY)
				die("not removing '%s' recursively without -r",
				    *match ? match : ".");
		}
 
		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);
	}
 
	/*
	 * 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.name[i];
		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;
		for (i = 0; i < list.nr; i++) {
			const char *path = list.name[i];
			if (!remove_path(path)) {
				removed = 1;
				continue;
			}
			if (!removed)
				die_errno("git rm: '%s'", path);
		}
	}
 
	if (active_cache_changed) {
		if (write_cache(newfd, active_cache, active_nr) ||
		    commit_locked_index(&lock_file))
			die("Unable to write new index file");
	}
 
	return 0;
}