Merge branch 'js/fast-export-paths-with-spaces'
[git] / builtin / rm.c
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
13 static const char * const builtin_rm_usage[] = {
14         "git rm [options] [--] <file>...",
15         NULL
16 };
17
18 static struct {
19         int nr, alloc;
20         const char **name;
21 } list;
22
23 static int check_local_mod(unsigned char *head, int index_only)
24 {
25         /*
26          * Items in list are already sorted in the cache order,
27          * so we could do this a lot more efficiently by using
28          * tree_desc based traversal if we wanted to, but I am
29          * lazy, and who cares if removal of files is a tad
30          * slower than the theoretical maximum speed?
31          */
32         int i, no_head;
33         int errs = 0;
34
35         no_head = is_null_sha1(head);
36         for (i = 0; i < list.nr; i++) {
37                 struct stat st;
38                 int pos;
39                 struct cache_entry *ce;
40                 const char *name = list.name[i];
41                 unsigned char sha1[20];
42                 unsigned mode;
43                 int local_changes = 0;
44                 int staged_changes = 0;
45
46                 pos = cache_name_pos(name, strlen(name));
47                 if (pos < 0)
48                         continue; /* removing unmerged entry */
49                 ce = active_cache[pos];
50
51                 if (lstat(ce->name, &st) < 0) {
52                         if (errno != ENOENT)
53                                 warning("'%s': %s", ce->name, strerror(errno));
54                         /* It already vanished from the working tree */
55                         continue;
56                 }
57                 else if (S_ISDIR(st.st_mode)) {
58                         /* if a file was removed and it is now a
59                          * directory, that is the same as ENOENT as
60                          * far as git is concerned; we do not track
61                          * directories.
62                          */
63                         continue;
64                 }
65
66                 /*
67                  * "rm" of a path that has changes need to be treated
68                  * carefully not to allow losing local changes
69                  * accidentally.  A local change could be (1) file in
70                  * work tree is different since the index; and/or (2)
71                  * the user staged a content that is different from
72                  * the current commit in the index.
73                  *
74                  * In such a case, you would need to --force the
75                  * removal.  However, "rm --cached" (remove only from
76                  * the index) is safe if the index matches the file in
77                  * the work tree or the HEAD commit, as it means that
78                  * the content being removed is available elsewhere.
79                  */
80
81                 /*
82                  * Is the index different from the file in the work tree?
83                  */
84                 if (ce_match_stat(ce, &st, 0))
85                         local_changes = 1;
86
87                 /*
88                  * Is the index different from the HEAD commit?  By
89                  * definition, before the very initial commit,
90                  * anything staged in the index is treated by the same
91                  * way as changed from the HEAD.
92                  */
93                 if (no_head
94                      || get_tree_entry(head, name, sha1, &mode)
95                      || ce->ce_mode != create_ce_mode(mode)
96                      || hashcmp(ce->sha1, sha1))
97                         staged_changes = 1;
98
99                 /*
100                  * If the index does not match the file in the work
101                  * tree and if it does not match the HEAD commit
102                  * either, (1) "git rm" without --cached definitely
103                  * will lose information; (2) "git rm --cached" will
104                  * lose information unless it is about removing an
105                  * "intent to add" entry.
106                  */
107                 if (local_changes && staged_changes) {
108                         if (!index_only || !(ce->ce_flags & CE_INTENT_TO_ADD))
109                                 errs = error(_("'%s' has staged content different "
110                                              "from both the file and the HEAD\n"
111                                              "(use -f to force removal)"), name);
112                 }
113                 else if (!index_only) {
114                         if (staged_changes)
115                                 errs = error(_("'%s' has changes staged in the index\n"
116                                              "(use --cached to keep the file, "
117                                              "or -f to force removal)"), name);
118                         if (local_changes)
119                                 errs = error(_("'%s' has local modifications\n"
120                                              "(use --cached to keep the file, "
121                                              "or -f to force removal)"), name);
122                 }
123         }
124         return errs;
125 }
126
127 static struct lock_file lock_file;
128
129 static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
130 static int ignore_unmatch = 0;
131
132 static struct option builtin_rm_options[] = {
133         OPT__DRY_RUN(&show_only, "dry run"),
134         OPT__QUIET(&quiet, "do not list removed files"),
135         OPT_BOOLEAN( 0 , "cached",         &index_only, "only remove from the index"),
136         OPT__FORCE(&force, "override the up-to-date check"),
137         OPT_BOOLEAN('r', NULL,             &recursive,  "allow recursive removal"),
138         OPT_BOOLEAN( 0 , "ignore-unmatch", &ignore_unmatch,
139                                 "exit with a zero status even if nothing matched"),
140         OPT_END(),
141 };
142
143 int cmd_rm(int argc, const char **argv, const char *prefix)
144 {
145         int i, newfd;
146         const char **pathspec;
147         char *seen;
148
149         git_config(git_default_config, NULL);
150
151         argc = parse_options(argc, argv, prefix, builtin_rm_options,
152                              builtin_rm_usage, 0);
153         if (!argc)
154                 usage_with_options(builtin_rm_usage, builtin_rm_options);
155
156         if (!index_only)
157                 setup_work_tree();
158
159         newfd = hold_locked_index(&lock_file, 1);
160
161         if (read_cache() < 0)
162                 die(_("index file corrupt"));
163
164         pathspec = get_pathspec(prefix, argv);
165         refresh_index(&the_index, REFRESH_QUIET, pathspec, NULL, NULL);
166
167         seen = NULL;
168         for (i = 0; pathspec[i] ; i++)
169                 /* nothing */;
170         seen = xcalloc(i, 1);
171
172         for (i = 0; i < active_nr; i++) {
173                 struct cache_entry *ce = active_cache[i];
174                 if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
175                         continue;
176                 ALLOC_GROW(list.name, list.nr + 1, list.alloc);
177                 list.name[list.nr++] = ce->name;
178         }
179
180         if (pathspec) {
181                 const char *match;
182                 int seen_any = 0;
183                 for (i = 0; (match = pathspec[i]) != NULL ; i++) {
184                         if (!seen[i]) {
185                                 if (!ignore_unmatch) {
186                                         die(_("pathspec '%s' did not match any files"),
187                                             match);
188                                 }
189                         }
190                         else {
191                                 seen_any = 1;
192                         }
193                         if (!recursive && seen[i] == MATCHED_RECURSIVELY)
194                                 die(_("not removing '%s' recursively without -r"),
195                                     *match ? match : ".");
196                 }
197
198                 if (! seen_any)
199                         exit(0);
200         }
201
202         /*
203          * If not forced, the file, the index and the HEAD (if exists)
204          * must match; but the file can already been removed, since
205          * this sequence is a natural "novice" way:
206          *
207          *      rm F; git rm F
208          *
209          * Further, if HEAD commit exists, "diff-index --cached" must
210          * report no changes unless forced.
211          */
212         if (!force) {
213                 unsigned char sha1[20];
214                 if (get_sha1("HEAD", sha1))
215                         hashclr(sha1);
216                 if (check_local_mod(sha1, index_only))
217                         exit(1);
218         }
219
220         /*
221          * First remove the names from the index: we won't commit
222          * the index unless all of them succeed.
223          */
224         for (i = 0; i < list.nr; i++) {
225                 const char *path = list.name[i];
226                 if (!quiet)
227                         printf("rm '%s'\n", path);
228
229                 if (remove_file_from_cache(path))
230                         die(_("git rm: unable to remove %s"), path);
231         }
232
233         if (show_only)
234                 return 0;
235
236         /*
237          * Then, unless we used "--cached", remove the filenames from
238          * the workspace. If we fail to remove the first one, we
239          * abort the "git rm" (but once we've successfully removed
240          * any file at all, we'll go ahead and commit to it all:
241          * by then we've already committed ourselves and can't fail
242          * in the middle)
243          */
244         if (!index_only) {
245                 int removed = 0;
246                 for (i = 0; i < list.nr; i++) {
247                         const char *path = list.name[i];
248                         if (!remove_path(path)) {
249                                 removed = 1;
250                                 continue;
251                         }
252                         if (!removed)
253                                 die_errno("git rm: '%s'", path);
254                 }
255         }
256
257         if (active_cache_changed) {
258                 if (write_cache(newfd, active_cache, active_nr) ||
259                     commit_locked_index(&lock_file))
260                         die(_("Unable to write new index file"));
261         }
262
263         return 0;
264 }