diff options
Diffstat (limited to 'builtin/rm.c')
| -rw-r--r-- | builtin/rm.c | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/builtin/rm.c b/builtin/rm.c new file mode 100644 index 0000000000..0df0b4d942 --- /dev/null +++ b/builtin/rm.c @@ -0,0 +1,436 @@ +/* + * "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" +#include "string-list.h" +#include "submodule.h" + +static const char * const builtin_rm_usage[] = { + N_("git rm [options] [--] <file>..."), + NULL +}; + +static struct { + int nr, alloc; + struct { + const char *name; + char is_submodule; + } *entry; +} list; + +static int get_ours_cache_pos(const char *path, int pos) +{ + int i = -pos - 1; + + while ((i < active_nr) && !strcmp(active_cache[i]->name, path)) { + if (ce_stage(active_cache[i]) == 2) + return i; + i++; + } + return -1; +} + +static void print_error_files(struct string_list *files_list, + const char *main_msg, + const char *hints_msg, + int *errs) +{ + if (files_list->nr) { + int i; + struct strbuf err_msg = STRBUF_INIT; + + strbuf_addstr(&err_msg, main_msg); + for (i = 0; i < files_list->nr; i++) + strbuf_addf(&err_msg, + "\n %s", + files_list->items[i].string); + if (advice_rm_hints) + strbuf_addstr(&err_msg, hints_msg); + *errs = error("%s", err_msg.buf); + strbuf_release(&err_msg); + } +} + +static void error_removing_concrete_submodules(struct string_list *files, int *errs) +{ + print_error_files(files, + Q_("the following submodule (or one of its nested " + "submodules)\n" + "uses a .git directory:", + "the following submodules (or one of its nested " + "submodules)\n" + "use a .git directory:", files->nr), + _("\n(use 'rm -rf' if you really want to remove " + "it including all of its history)"), + errs); + string_list_clear(files, 0); +} + +static int check_submodules_use_gitfiles(void) +{ + int i; + int errs = 0; + struct string_list files = STRING_LIST_INIT_NODUP; + + for (i = 0; i < list.nr; i++) { + const char *name = list.entry[i].name; + int pos; + const struct cache_entry *ce; + struct stat st; + + pos = cache_name_pos(name, strlen(name)); + if (pos < 0) { + pos = get_ours_cache_pos(name, pos); + if (pos < 0) + continue; + } + ce = active_cache[pos]; + + if (!S_ISGITLINK(ce->ce_mode) || + (lstat(ce->name, &st) < 0) || + is_empty_dir(name)) + continue; + + if (!submodule_uses_gitfile(name)) + string_list_append(&files, name); + } + + error_removing_concrete_submodules(&files, &errs); + + return errs; +} + +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; + struct string_list files_staged = STRING_LIST_INIT_NODUP; + struct string_list files_cached = STRING_LIST_INIT_NODUP; + struct string_list files_submodule = STRING_LIST_INIT_NODUP; + struct string_list files_local = STRING_LIST_INIT_NODUP; + + no_head = is_null_sha1(head); + for (i = 0; i < list.nr; i++) { + struct stat st; + int pos; + const struct cache_entry *ce; + const char *name = list.entry[i].name; + unsigned char sha1[20]; + unsigned mode; + int local_changes = 0; + int staged_changes = 0; + + pos = cache_name_pos(name, strlen(name)); + if (pos < 0) { + /* + * Skip unmerged entries except for populated submodules + * that could lose history when removed. + */ + pos = get_ours_cache_pos(name, pos); + if (pos < 0) + continue; + + if (!S_ISGITLINK(active_cache[pos]->ce_mode) || + is_empty_dir(name)) + continue; + } + ce = active_cache[pos]; + + if (lstat(ce->name, &st) < 0) { + if (errno != ENOENT && errno != ENOTDIR) + 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 unless they are submodules. + */ + if (!S_ISGITLINK(ce->ce_mode)) + 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 it's a submodule, is its work tree modified? + */ + if (ce_match_stat(ce, &st, 0) || + (S_ISGITLINK(ce->ce_mode) && + !ok_to_remove_submodule(ce->name))) + 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)) + string_list_append(&files_staged, name); + } + else if (!index_only) { + if (staged_changes) + string_list_append(&files_cached, name); + if (local_changes) { + if (S_ISGITLINK(ce->ce_mode) && + !submodule_uses_gitfile(name)) + string_list_append(&files_submodule, name); + else + string_list_append(&files_local, name); + } + } + } + print_error_files(&files_staged, + Q_("the following file has staged content different " + "from both the\nfile and the HEAD:", + "the following files have staged content different" + " from both the\nfile and the HEAD:", + files_staged.nr), + _("\n(use -f to force removal)"), + &errs); + string_list_clear(&files_staged, 0); + print_error_files(&files_cached, + Q_("the following file has changes " + "staged in the index:", + "the following files have changes " + "staged in the index:", files_cached.nr), + _("\n(use --cached to keep the file," + " or -f to force removal)"), + &errs); + string_list_clear(&files_cached, 0); + + error_removing_concrete_submodules(&files_submodule, &errs); + + print_error_files(&files_local, + Q_("the following file has local modifications:", + "the following files have local modifications:", + files_local.nr), + _("\n(use --cached to keep the file," + " or -f to force removal)"), + &errs); + string_list_clear(&files_local, 0); + + 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, N_("dry run")), + OPT__QUIET(&quiet, N_("do not list removed files")), + OPT_BOOLEAN( 0 , "cached", &index_only, N_("only remove from the index")), + OPT__FORCE(&force, N_("override the up-to-date check")), + OPT_BOOLEAN('r', NULL, &recursive, N_("allow recursive removal")), + OPT_BOOLEAN( 0 , "ignore-unmatch", &ignore_unmatch, + N_("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")); + + /* + * Drop trailing directory separators from directories so we'll find + * submodules in the index. + */ + for (i = 0; i < argc; i++) { + size_t pathlen = strlen(argv[i]); + if (pathlen && is_dir_sep(argv[i][pathlen - 1]) && + is_directory(argv[i])) { + do { + pathlen--; + } while (pathlen && is_dir_sep(argv[i][pathlen - 1])); + argv[i] = xmemdupz(argv[i], pathlen); + } + } + + 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++) { + const struct cache_entry *ce = active_cache[i]; + if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen)) + continue; + ALLOC_GROW(list.entry, list.nr + 1, list.alloc); + list.entry[list.nr].name = ce->name; + list.entry[list.nr++].is_submodule = S_ISGITLINK(ce->ce_mode); + } + + 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); + } else if (!index_only) { + if (check_submodules_use_gitfiles()) + 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.entry[i].name; + 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.entry[i].name; + if (list.entry[i].is_submodule) { + if (is_empty_dir(path)) { + if (!rmdir(path)) { + removed = 1; + continue; + } + } else { + struct strbuf buf = STRBUF_INIT; + strbuf_addstr(&buf, path); + if (!remove_dir_recursively(&buf, 0)) { + removed = 1; + strbuf_release(&buf); + continue; + } + strbuf_release(&buf); + /* Fallthrough and let remove_path() fail. */ + } + } + 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; +} |