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] [--] <file>..."; 14 15static struct{ 16int nr, alloc; 17const char**name; 18} list; 19 20static voidadd_list(const char*name) 21{ 22if(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 intremove_file(const char*name) 30{ 31int ret; 32char*slash; 33 34 ret =unlink(name); 35if(ret && errno == ENOENT) 36/* The user has removed it from the filesystem by hand */ 37 ret = errno =0; 38 39if(!ret && (slash =strrchr(name,'/'))) { 40char*n =xstrdup(name); 41do{ 42 n[slash - name] =0; 43 name = n; 44}while(!rmdir(name) && (slash =strrchr(name,'/'))); 45} 46return ret; 47} 48 49static intcheck_local_mod(unsigned char*head) 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 */ 57int i, no_head; 58int errs =0; 59 60 no_head =is_null_sha1(head); 61for(i =0; i < list.nr; i++) { 62struct stat st; 63int pos; 64struct cache_entry *ce; 65const char*name = list.name[i]; 66unsigned char sha1[20]; 67unsigned mode; 68 69 pos =cache_name_pos(name,strlen(name)); 70if(pos <0) 71continue;/* removing unmerged entry */ 72 ce = active_cache[pos]; 73 74if(lstat(ce->name, &st) <0) { 75if(errno != ENOENT) 76fprintf(stderr,"warning: '%s':%s", 77 ce->name,strerror(errno)); 78/* It already vanished from the working tree */ 79continue; 80} 81else if(S_ISDIR(st.st_mode)) { 82/* if a file was removed and it is now a 83 * directory, that is the same as ENOENT as 84 * far as git is concerned; we do not track 85 * directories. 86 */ 87continue; 88} 89if(ce_match_stat(ce, &st,0)) 90 errs =error("'%s' has local modifications " 91"(hint: try -f)", ce->name); 92if(no_head 93||get_tree_entry(head, name, sha1, &mode) 94|| ce->ce_mode !=create_ce_mode(mode) 95||hashcmp(ce->sha1, sha1)) 96 errs =error("'%s' has changes staged in the index " 97"(hint: try -f)", name); 98} 99return errs; 100} 101 102static struct lock_file lock_file; 103 104intcmd_rm(int argc,const char**argv,const char*prefix) 105{ 106int i, newfd; 107int show_only =0, force =0, index_only =0, recursive =0; 108const char**pathspec; 109char*seen; 110 111git_config(git_default_config); 112 113 newfd =hold_lock_file_for_update(&lock_file,get_index_file(),1); 114 115if(read_cache() <0) 116die("index file corrupt"); 117 118for(i =1; i < argc ; i++) { 119const char*arg = argv[i]; 120 121if(*arg !='-') 122break; 123else if(!strcmp(arg,"--")) { 124 i++; 125break; 126} 127else if(!strcmp(arg,"-n")) 128 show_only =1; 129else if(!strcmp(arg,"--cached")) 130 index_only =1; 131else if(!strcmp(arg,"-f")) 132 force =1; 133else if(!strcmp(arg,"-r")) 134 recursive =1; 135else 136usage(builtin_rm_usage); 137} 138if(argc <= i) 139usage(builtin_rm_usage); 140 141 pathspec =get_pathspec(prefix, argv + i); 142 seen = NULL; 143for(i =0; pathspec[i] ; i++) 144/* nothing */; 145 seen =xcalloc(i,1); 146 147for(i =0; i < active_nr; i++) { 148struct cache_entry *ce = active_cache[i]; 149if(!match_pathspec(pathspec, ce->name,ce_namelen(ce),0, seen)) 150continue; 151add_list(ce->name); 152} 153 154if(pathspec) { 155const char*match; 156for(i =0; (match = pathspec[i]) != NULL ; i++) { 157if(!seen[i]) 158die("pathspec '%s' did not match any files", 159 match); 160if(!recursive && seen[i] == MATCHED_RECURSIVELY) 161die("not removing '%s' recursively without -r", 162*match ? match :"."); 163} 164} 165 166/* 167 * If not forced, the file, the index and the HEAD (if exists) 168 * must match; but the file can already been removed, since 169 * this sequence is a natural "novice" way: 170 * 171 * rm F; git fm F 172 * 173 * Further, if HEAD commit exists, "diff-index --cached" must 174 * report no changes unless forced. 175 */ 176if(!force) { 177unsigned char sha1[20]; 178if(get_sha1("HEAD", sha1)) 179hashclr(sha1); 180if(check_local_mod(sha1)) 181exit(1); 182} 183 184/* 185 * First remove the names from the index: we won't commit 186 * the index unless all of them succeed. 187 */ 188for(i =0; i < list.nr; i++) { 189const char*path = list.name[i]; 190printf("rm '%s'\n", path); 191 192if(remove_file_from_cache(path)) 193die("git-rm: unable to remove%s", path); 194cache_tree_invalidate_path(active_cache_tree, path); 195} 196 197if(show_only) 198return0; 199 200/* 201 * Then, unless we used "--cached", remove the filenames from 202 * the workspace. If we fail to remove the first one, we 203 * abort the "git rm" (but once we've successfully removed 204 * any file at all, we'll go ahead and commit to it all: 205 * by then we've already committed ourselves and can't fail 206 * in the middle) 207 */ 208if(!index_only) { 209int removed =0; 210for(i =0; i < list.nr; i++) { 211const char*path = list.name[i]; 212if(!remove_file(path)) { 213 removed =1; 214continue; 215} 216if(!removed) 217die("git-rm:%s:%s", path,strerror(errno)); 218} 219} 220 221if(active_cache_changed) { 222if(write_cache(newfd, active_cache, active_nr) || 223close(newfd) ||commit_lock_file(&lock_file)) 224die("Unable to write new index file"); 225} 226 227return0; 228}