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 12static const char builtin_rm_usage[] = 13"git-rm [-f] [-n] [-r] [--cached] [--ignore-unmatch] [--quiet] [--] <file>..."; 14 15static struct { 16 int nr, alloc; 17 const char **name; 18} list; 19 20static void add_list(const char *name) 21{ 22 if (list.nr >= list.alloc) { 23 list.alloc = alloc_nr(list.alloc); 24 list.name = xrealloc(list.name, list.alloc * sizeof(const char *)); 25 } 26 list.name[list.nr++] = name; 27} 28 29static int remove_file(const char *name) 30{ 31 int ret; 32 char *slash; 33 34 ret = unlink(name); 35 if (ret && errno == ENOENT) 36 /* The user has removed it from the filesystem by hand */ 37 ret = errno = 0; 38 39 if (!ret && (slash = strrchr(name, '/'))) { 40 char *n = xstrdup(name); 41 do { 42 n[slash - name] = 0; 43 name = n; 44 } while (!rmdir(name) && (slash = strrchr(name, '/'))); 45 } 46 return ret; 47} 48 49static int check_local_mod(unsigned char *head, int index_only) 50{ 51 /* items in list are already sorted in the cache order, 52 * so we could do this a lot more efficiently by using 53 * tree_desc based traversal if we wanted to, but I am 54 * lazy, and who cares if removal of files is a tad 55 * slower than the theoretical maximum speed? 56 */ 57 int i, no_head; 58 int errs = 0; 59 60 no_head = is_null_sha1(head); 61 for (i = 0; i < list.nr; i++) { 62 struct stat st; 63 int pos; 64 struct cache_entry *ce; 65 const char *name = list.name[i]; 66 unsigned char sha1[20]; 67 unsigned mode; 68 int local_changes = 0; 69 int staged_changes = 0; 70 71 pos = cache_name_pos(name, strlen(name)); 72 if (pos < 0) 73 continue; /* removing unmerged entry */ 74 ce = active_cache[pos]; 75 76 if (lstat(ce->name, &st) < 0) { 77 if (errno != ENOENT) 78 fprintf(stderr, "warning: '%s': %s", 79 ce->name, strerror(errno)); 80 /* It already vanished from the working tree */ 81 continue; 82 } 83 else if (S_ISDIR(st.st_mode)) { 84 /* if a file was removed and it is now a 85 * directory, that is the same as ENOENT as 86 * far as git is concerned; we do not track 87 * directories. 88 */ 89 continue; 90 } 91 if (ce_match_stat(ce, &st, 0)) 92 local_changes = 1; 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 if (local_changes && staged_changes) 100 errs = error("'%s' has staged content different " 101 "from both the file and the HEAD\n" 102 "(use -f to force removal)", name); 103 else if (!index_only) { 104 /* It's not dangerous to git-rm --cached a 105 * file if the index matches the file or the 106 * HEAD, since it means the deleted content is 107 * still available somewhere. 108 */ 109 if (staged_changes) 110 errs = error("'%s' has changes staged in the index\n" 111 "(use --cached to keep the file, " 112 "or -f to force removal)", name); 113 if (local_changes) 114 errs = error("'%s' has local modifications\n" 115 "(use --cached to keep the file, " 116 "or -f to force removal)", name); 117 } 118 } 119 return errs; 120} 121 122static struct lock_file lock_file; 123 124int cmd_rm(int argc, const char **argv, const char *prefix) 125{ 126 int i, newfd; 127 int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0; 128 int ignore_unmatch = 0; 129 const char **pathspec; 130 char *seen; 131 132 git_config(git_default_config); 133 134 newfd = hold_locked_index(&lock_file, 1); 135 136 if (read_cache() < 0) 137 die("index file corrupt"); 138 139 for (i = 1 ; i < argc ; i++) { 140 const char *arg = argv[i]; 141 142 if (*arg != '-') 143 break; 144 else if (!strcmp(arg, "--")) { 145 i++; 146 break; 147 } 148 else if (!strcmp(arg, "-n")) 149 show_only = 1; 150 else if (!strcmp(arg, "--cached")) 151 index_only = 1; 152 else if (!strcmp(arg, "-f")) 153 force = 1; 154 else if (!strcmp(arg, "-r")) 155 recursive = 1; 156 else if (!strcmp(arg, "--quiet")) 157 quiet = 1; 158 else if (!strcmp(arg, "--ignore-unmatch")) 159 ignore_unmatch = 1; 160 else 161 usage(builtin_rm_usage); 162 } 163 if (argc <= i) 164 usage(builtin_rm_usage); 165 166 pathspec = get_pathspec(prefix, argv + i); 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 add_list(ce->name); 177 } 178 179 if (pathspec) { 180 const char *match; 181 int seen_any = 0; 182 for (i = 0; (match = pathspec[i]) != NULL ; i++) { 183 if (!seen[i]) { 184 if (!ignore_unmatch) { 185 die("pathspec '%s' did not match any files", 186 match); 187 } 188 } 189 else { 190 seen_any = 1; 191 } 192 if (!recursive && seen[i] == MATCHED_RECURSIVELY) 193 die("not removing '%s' recursively without -r", 194 *match ? match : "."); 195 } 196 197 if (! seen_any) 198 exit(0); 199 } 200 201 /* 202 * If not forced, the file, the index and the HEAD (if exists) 203 * must match; but the file can already been removed, since 204 * this sequence is a natural "novice" way: 205 * 206 * rm F; git rm F 207 * 208 * Further, if HEAD commit exists, "diff-index --cached" must 209 * report no changes unless forced. 210 */ 211 if (!force) { 212 unsigned char sha1[20]; 213 if (get_sha1("HEAD", sha1)) 214 hashclr(sha1); 215 if (check_local_mod(sha1, index_only)) 216 exit(1); 217 } 218 219 /* 220 * First remove the names from the index: we won't commit 221 * the index unless all of them succeed. 222 */ 223 for (i = 0; i < list.nr; i++) { 224 const char *path = list.name[i]; 225 if (!quiet) 226 printf("rm '%s'\n", path); 227 228 if (remove_file_from_cache(path)) 229 die("git-rm: unable to remove %s", path); 230 cache_tree_invalidate_path(active_cache_tree, 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_file(path)) { 249 removed = 1; 250 continue; 251 } 252 if (!removed) 253 die("git-rm: %s: %s", path, strerror(errno)); 254 } 255 } 256 257 if (active_cache_changed) { 258 if (write_cache(newfd, active_cache, active_nr) || 259 close(newfd) || commit_locked_index(&lock_file)) 260 die("Unable to write new index file"); 261 } 262 263 return 0; 264}