Merge branch 'maint'
[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 void add_list(const char *name)
24 {
25         if (list.nr >= list.alloc) {
26                 list.alloc = alloc_nr(list.alloc);
27                 list.name = xrealloc(list.name, list.alloc * sizeof(const char *));
28         }
29         list.name[list.nr++] = name;
30 }
31
32 static int check_local_mod(unsigned char *head, int index_only)
33 {
34         /* items in list are already sorted in the cache order,
35          * so we could do this a lot more efficiently by using
36          * tree_desc based traversal if we wanted to, but I am
37          * lazy, and who cares if removal of files is a tad
38          * slower than the theoretical maximum speed?
39          */
40         int i, no_head;
41         int errs = 0;
42
43         no_head = is_null_sha1(head);
44         for (i = 0; i < list.nr; i++) {
45                 struct stat st;
46                 int pos;
47                 struct cache_entry *ce;
48                 const char *name = list.name[i];
49                 unsigned char sha1[20];
50                 unsigned mode;
51                 int local_changes = 0;
52                 int staged_changes = 0;
53
54                 pos = cache_name_pos(name, strlen(name));
55                 if (pos < 0)
56                         continue; /* removing unmerged entry */
57                 ce = active_cache[pos];
58
59                 if (lstat(ce->name, &st) < 0) {
60                         if (errno != ENOENT)
61                                 fprintf(stderr, "warning: '%s': %s",
62                                         ce->name, strerror(errno));
63                         /* It already vanished from the working tree */
64                         continue;
65                 }
66                 else if (S_ISDIR(st.st_mode)) {
67                         /* if a file was removed and it is now a
68                          * directory, that is the same as ENOENT as
69                          * far as git is concerned; we do not track
70                          * directories.
71                          */
72                         continue;
73                 }
74                 if (ce_match_stat(ce, &st, 0))
75                         local_changes = 1;
76                 if (no_head
77                      || get_tree_entry(head, name, sha1, &mode)
78                      || ce->ce_mode != create_ce_mode(mode)
79                      || hashcmp(ce->sha1, sha1))
80                         staged_changes = 1;
81
82                 if (local_changes && staged_changes &&
83                     !(index_only && is_empty_blob_sha1(ce->sha1)))
84                         errs = error("'%s' has staged content different "
85                                      "from both the file and the HEAD\n"
86                                      "(use -f to force removal)", name);
87                 else if (!index_only) {
88                         /* It's not dangerous to "git rm --cached" a
89                          * file if the index matches the file or the
90                          * HEAD, since it means the deleted content is
91                          * still available somewhere.
92                          */
93                         if (staged_changes)
94                                 errs = error("'%s' has changes staged in the index\n"
95                                              "(use --cached to keep the file, "
96                                              "or -f to force removal)", name);
97                         if (local_changes)
98                                 errs = error("'%s' has local modifications\n"
99                                              "(use --cached to keep the file, "
100                                              "or -f to force removal)", name);
101                 }
102         }
103         return errs;
104 }
105
106 static struct lock_file lock_file;
107
108 static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
109 static int ignore_unmatch = 0;
110
111 static struct option builtin_rm_options[] = {
112         OPT__DRY_RUN(&show_only),
113         OPT__QUIET(&quiet),
114         OPT_BOOLEAN( 0 , "cached",         &index_only, "only remove from the index"),
115         OPT_BOOLEAN('f', "force",          &force,      "override the up-to-date check"),
116         OPT_BOOLEAN('r', NULL,             &recursive,  "allow recursive removal"),
117         OPT_BOOLEAN( 0 , "ignore-unmatch", &ignore_unmatch,
118                                 "exit with a zero status even if nothing matched"),
119         OPT_END(),
120 };
121
122 int cmd_rm(int argc, const char **argv, const char *prefix)
123 {
124         int i, newfd;
125         const char **pathspec;
126         char *seen;
127
128         git_config(git_default_config, NULL);
129
130         argc = parse_options(argc, argv, builtin_rm_options, builtin_rm_usage, 0);
131         if (!argc)
132                 usage_with_options(builtin_rm_usage, builtin_rm_options);
133
134         if (!index_only)
135                 setup_work_tree();
136
137         newfd = hold_locked_index(&lock_file, 1);
138
139         if (read_cache() < 0)
140                 die("index file corrupt");
141         refresh_cache(REFRESH_QUIET);
142
143         pathspec = get_pathspec(prefix, argv);
144         seen = NULL;
145         for (i = 0; pathspec[i] ; i++)
146                 /* nothing */;
147         seen = xcalloc(i, 1);
148
149         for (i = 0; i < active_nr; i++) {
150                 struct cache_entry *ce = active_cache[i];
151                 if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
152                         continue;
153                 add_list(ce->name);
154         }
155
156         if (pathspec) {
157                 const char *match;
158                 int seen_any = 0;
159                 for (i = 0; (match = pathspec[i]) != NULL ; i++) {
160                         if (!seen[i]) {
161                                 if (!ignore_unmatch) {
162                                         die("pathspec '%s' did not match any files",
163                                             match);
164                                 }
165                         }
166                         else {
167                                 seen_any = 1;
168                         }
169                         if (!recursive && seen[i] == MATCHED_RECURSIVELY)
170                                 die("not removing '%s' recursively without -r",
171                                     *match ? match : ".");
172                 }
173
174                 if (! seen_any)
175                         exit(0);
176         }
177
178         /*
179          * If not forced, the file, the index and the HEAD (if exists)
180          * must match; but the file can already been removed, since
181          * this sequence is a natural "novice" way:
182          *
183          *      rm F; git rm F
184          *
185          * Further, if HEAD commit exists, "diff-index --cached" must
186          * report no changes unless forced.
187          */
188         if (!force) {
189                 unsigned char sha1[20];
190                 if (get_sha1("HEAD", sha1))
191                         hashclr(sha1);
192                 if (check_local_mod(sha1, index_only))
193                         exit(1);
194         }
195
196         /*
197          * First remove the names from the index: we won't commit
198          * the index unless all of them succeed.
199          */
200         for (i = 0; i < list.nr; i++) {
201                 const char *path = list.name[i];
202                 if (!quiet)
203                         printf("rm '%s'\n", path);
204
205                 if (remove_file_from_cache(path))
206                         die("git rm: unable to remove %s", path);
207         }
208
209         if (show_only)
210                 return 0;
211
212         /*
213          * Then, unless we used "--cached", remove the filenames from
214          * the workspace. If we fail to remove the first one, we
215          * abort the "git rm" (but once we've successfully removed
216          * any file at all, we'll go ahead and commit to it all:
217          * by then we've already committed ourselves and can't fail
218          * in the middle)
219          */
220         if (!index_only) {
221                 int removed = 0;
222                 for (i = 0; i < list.nr; i++) {
223                         const char *path = list.name[i];
224                         if (!remove_path(path)) {
225                                 removed = 1;
226                                 continue;
227                         }
228                         if (!removed)
229                                 die("git rm: %s: %s", path, strerror(errno));
230                 }
231         }
232
233         if (active_cache_changed) {
234                 if (write_cache(newfd, active_cache, active_nr) ||
235                     commit_locked_index(&lock_file))
236                         die("Unable to write new index file");
237         }
238
239         return 0;
240 }