diff options
Diffstat (limited to 'third_party/git/dir.c')
| -rw-r--r-- | third_party/git/dir.c | 3603 |
1 files changed, 0 insertions, 3603 deletions
diff --git a/third_party/git/dir.c b/third_party/git/dir.c deleted file mode 100644 index 78387110e609..000000000000 --- a/third_party/git/dir.c +++ /dev/null @@ -1,3603 +0,0 @@ -/* - * This handles recursive filename detection with exclude - * files, index knowledge etc.. - * - * Copyright (C) Linus Torvalds, 2005-2006 - * Junio Hamano, 2005-2006 - */ -#include "cache.h" -#include "config.h" -#include "dir.h" -#include "object-store.h" -#include "attr.h" -#include "refs.h" -#include "wildmatch.h" -#include "pathspec.h" -#include "utf8.h" -#include "varint.h" -#include "ewah/ewok.h" -#include "fsmonitor.h" -#include "submodule-config.h" - -/* - * Tells read_directory_recursive how a file or directory should be treated. - * Values are ordered by significance, e.g. if a directory contains both - * excluded and untracked files, it is listed as untracked because - * path_untracked > path_excluded. - */ -enum path_treatment { - path_none = 0, - path_recurse, - path_excluded, - path_untracked -}; - -/* - * Support data structure for our opendir/readdir/closedir wrappers - */ -struct cached_dir { - DIR *fdir; - struct untracked_cache_dir *untracked; - int nr_files; - int nr_dirs; - - const char *d_name; - int d_type; - const char *file; - struct untracked_cache_dir *ucd; -}; - -static enum path_treatment read_directory_recursive(struct dir_struct *dir, - struct index_state *istate, const char *path, int len, - struct untracked_cache_dir *untracked, - int check_only, int stop_at_first_file, const struct pathspec *pathspec); -static int resolve_dtype(int dtype, struct index_state *istate, - const char *path, int len); - -void dir_init(struct dir_struct *dir) -{ - memset(dir, 0, sizeof(*dir)); -} - -int count_slashes(const char *s) -{ - int cnt = 0; - while (*s) - if (*s++ == '/') - cnt++; - return cnt; -} - -int fspathcmp(const char *a, const char *b) -{ - return ignore_case ? strcasecmp(a, b) : strcmp(a, b); -} - -int fspathncmp(const char *a, const char *b, size_t count) -{ - return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); -} - -int git_fnmatch(const struct pathspec_item *item, - const char *pattern, const char *string, - int prefix) -{ - if (prefix > 0) { - if (ps_strncmp(item, pattern, string, prefix)) - return WM_NOMATCH; - pattern += prefix; - string += prefix; - } - if (item->flags & PATHSPEC_ONESTAR) { - int pattern_len = strlen(++pattern); - int string_len = strlen(string); - return string_len < pattern_len || - ps_strcmp(item, pattern, - string + string_len - pattern_len); - } - if (item->magic & PATHSPEC_GLOB) - return wildmatch(pattern, string, - WM_PATHNAME | - (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0)); - else - /* wildmatch has not learned no FNM_PATHNAME mode yet */ - return wildmatch(pattern, string, - item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0); -} - -static int fnmatch_icase_mem(const char *pattern, int patternlen, - const char *string, int stringlen, - int flags) -{ - int match_status; - struct strbuf pat_buf = STRBUF_INIT; - struct strbuf str_buf = STRBUF_INIT; - const char *use_pat = pattern; - const char *use_str = string; - - if (pattern[patternlen]) { - strbuf_add(&pat_buf, pattern, patternlen); - use_pat = pat_buf.buf; - } - if (string[stringlen]) { - strbuf_add(&str_buf, string, stringlen); - use_str = str_buf.buf; - } - - if (ignore_case) - flags |= WM_CASEFOLD; - match_status = wildmatch(use_pat, use_str, flags); - - strbuf_release(&pat_buf); - strbuf_release(&str_buf); - - return match_status; -} - -static size_t common_prefix_len(const struct pathspec *pathspec) -{ - int n; - size_t max = 0; - - /* - * ":(icase)path" is treated as a pathspec full of - * wildcard. In other words, only prefix is considered common - * prefix. If the pathspec is abc/foo abc/bar, running in - * subdir xyz, the common prefix is still xyz, not xyz/abc as - * in non-:(icase). - */ - GUARD_PATHSPEC(pathspec, - PATHSPEC_FROMTOP | - PATHSPEC_MAXDEPTH | - PATHSPEC_LITERAL | - PATHSPEC_GLOB | - PATHSPEC_ICASE | - PATHSPEC_EXCLUDE | - PATHSPEC_ATTR); - - for (n = 0; n < pathspec->nr; n++) { - size_t i = 0, len = 0, item_len; - if (pathspec->items[n].magic & PATHSPEC_EXCLUDE) - continue; - if (pathspec->items[n].magic & PATHSPEC_ICASE) - item_len = pathspec->items[n].prefix; - else - item_len = pathspec->items[n].nowildcard_len; - while (i < item_len && (n == 0 || i < max)) { - char c = pathspec->items[n].match[i]; - if (c != pathspec->items[0].match[i]) - break; - if (c == '/') - len = i + 1; - i++; - } - if (n == 0 || len < max) { - max = len; - if (!max) - break; - } - } - return max; -} - -/* - * Returns a copy of the longest leading path common among all - * pathspecs. - */ -char *common_prefix(const struct pathspec *pathspec) -{ - unsigned long len = common_prefix_len(pathspec); - - return len ? xmemdupz(pathspec->items[0].match, len) : NULL; -} - -int fill_directory(struct dir_struct *dir, - struct index_state *istate, - const struct pathspec *pathspec) -{ - const char *prefix; - size_t prefix_len; - - unsigned exclusive_flags = DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO; - if ((dir->flags & exclusive_flags) == exclusive_flags) - BUG("DIR_SHOW_IGNORED and DIR_SHOW_IGNORED_TOO are exclusive"); - - /* - * Calculate common prefix for the pathspec, and - * use that to optimize the directory walk - */ - prefix_len = common_prefix_len(pathspec); - prefix = prefix_len ? pathspec->items[0].match : ""; - - /* Read the directory and prune it */ - read_directory(dir, istate, prefix, prefix_len, pathspec); - - return prefix_len; -} - -int within_depth(const char *name, int namelen, - int depth, int max_depth) -{ - const char *cp = name, *cpe = name + namelen; - - while (cp < cpe) { - if (*cp++ != '/') - continue; - depth++; - if (depth > max_depth) - return 0; - } - return 1; -} - -/* - * Read the contents of the blob with the given OID into a buffer. - * Append a trailing LF to the end if the last line doesn't have one. - * - * Returns: - * -1 when the OID is invalid or unknown or does not refer to a blob. - * 0 when the blob is empty. - * 1 along with { data, size } of the (possibly augmented) buffer - * when successful. - * - * Optionally updates the given oid_stat with the given OID (when valid). - */ -static int do_read_blob(const struct object_id *oid, struct oid_stat *oid_stat, - size_t *size_out, char **data_out) -{ - enum object_type type; - unsigned long sz; - char *data; - - *size_out = 0; - *data_out = NULL; - - data = read_object_file(oid, &type, &sz); - if (!data || type != OBJ_BLOB) { - free(data); - return -1; - } - - if (oid_stat) { - memset(&oid_stat->stat, 0, sizeof(oid_stat->stat)); - oidcpy(&oid_stat->oid, oid); - } - - if (sz == 0) { - free(data); - return 0; - } - - if (data[sz - 1] != '\n') { - data = xrealloc(data, st_add(sz, 1)); - data[sz++] = '\n'; - } - - *size_out = xsize_t(sz); - *data_out = data; - - return 1; -} - -#define DO_MATCH_EXCLUDE (1<<0) -#define DO_MATCH_DIRECTORY (1<<1) -#define DO_MATCH_LEADING_PATHSPEC (1<<2) - -/* - * Does the given pathspec match the given name? A match is found if - * - * (1) the pathspec string is leading directory of 'name' ("RECURSIVELY"), or - * (2) the pathspec string has a leading part matching 'name' ("LEADING"), or - * (3) the pathspec string is a wildcard and matches 'name' ("WILDCARD"), or - * (4) the pathspec string is exactly the same as 'name' ("EXACT"). - * - * Return value tells which case it was (1-4), or 0 when there is no match. - * - * It may be instructive to look at a small table of concrete examples - * to understand the differences between 1, 2, and 4: - * - * Pathspecs - * | a/b | a/b/ | a/b/c - * ------+-----------+-----------+------------ - * a/b | EXACT | EXACT[1] | LEADING[2] - * Names a/b/ | RECURSIVE | EXACT | LEADING[2] - * a/b/c | RECURSIVE | RECURSIVE | EXACT - * - * [1] Only if DO_MATCH_DIRECTORY is passed; otherwise, this is NOT a match. - * [2] Only if DO_MATCH_LEADING_PATHSPEC is passed; otherwise, not a match. - */ -static int match_pathspec_item(const struct index_state *istate, - const struct pathspec_item *item, int prefix, - const char *name, int namelen, unsigned flags) -{ - /* name/namelen has prefix cut off by caller */ - const char *match = item->match + prefix; - int matchlen = item->len - prefix; - - /* - * The normal call pattern is: - * 1. prefix = common_prefix_len(ps); - * 2. prune something, or fill_directory - * 3. match_pathspec() - * - * 'prefix' at #1 may be shorter than the command's prefix and - * it's ok for #2 to match extra files. Those extras will be - * trimmed at #3. - * - * Suppose the pathspec is 'foo' and '../bar' running from - * subdir 'xyz'. The common prefix at #1 will be empty, thanks - * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The - * user does not want XYZ/foo, only the "foo" part should be - * case-insensitive. We need to filter out XYZ/foo here. In - * other words, we do not trust the caller on comparing the - * prefix part when :(icase) is involved. We do exact - * comparison ourselves. - * - * Normally the caller (common_prefix_len() in fact) does - * _exact_ matching on name[-prefix+1..-1] and we do not need - * to check that part. Be defensive and check it anyway, in - * case common_prefix_len is changed, or a new caller is - * introduced that does not use common_prefix_len. - * - * If the penalty turns out too high when prefix is really - * long, maybe change it to - * strncmp(match, name, item->prefix - prefix) - */ - if (item->prefix && (item->magic & PATHSPEC_ICASE) && - strncmp(item->match, name - prefix, item->prefix)) - return 0; - - if (item->attr_match_nr && - !match_pathspec_attrs(istate, name, namelen, item)) - return 0; - - /* If the match was just the prefix, we matched */ - if (!*match) - return MATCHED_RECURSIVELY; - - if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { - if (matchlen == namelen) - return MATCHED_EXACTLY; - - if (match[matchlen-1] == '/' || name[matchlen] == '/') - return MATCHED_RECURSIVELY; - } else if ((flags & DO_MATCH_DIRECTORY) && - match[matchlen - 1] == '/' && - namelen == matchlen - 1 && - !ps_strncmp(item, match, name, namelen)) - return MATCHED_EXACTLY; - - if (item->nowildcard_len < item->len && - !git_fnmatch(item, match, name, - item->nowildcard_len - prefix)) - return MATCHED_FNMATCH; - - /* Perform checks to see if "name" is a leading string of the pathspec */ - if ( (flags & DO_MATCH_LEADING_PATHSPEC) && - !(flags & DO_MATCH_EXCLUDE)) { - /* name is a literal prefix of the pathspec */ - int offset = name[namelen-1] == '/' ? 1 : 0; - if ((namelen < matchlen) && - (match[namelen-offset] == '/') && - !ps_strncmp(item, match, name, namelen)) - return MATCHED_RECURSIVELY_LEADING_PATHSPEC; - - /* name doesn't match up to the first wild character */ - if (item->nowildcard_len < item->len && - ps_strncmp(item, match, name, - item->nowildcard_len - prefix)) - return 0; - - /* - * name has no wildcard, and it didn't match as a leading - * pathspec so return. - */ - if (item->nowildcard_len == item->len) - return 0; - - /* - * Here is where we would perform a wildmatch to check if - * "name" can be matched as a directory (or a prefix) against - * the pathspec. Since wildmatch doesn't have this capability - * at the present we have to punt and say that it is a match, - * potentially returning a false positive - * The submodules themselves will be able to perform more - * accurate matching to determine if the pathspec matches. - */ - return MATCHED_RECURSIVELY_LEADING_PATHSPEC; - } - - return 0; -} - -/* - * do_match_pathspec() is meant to ONLY be called by - * match_pathspec_with_flags(); calling it directly risks pathspecs - * like ':!unwanted_path' being ignored. - * - * Given a name and a list of pathspecs, returns the nature of the - * closest (i.e. most specific) match of the name to any of the - * pathspecs. - * - * The caller typically calls this multiple times with the same - * pathspec and seen[] array but with different name/namelen - * (e.g. entries from the index) and is interested in seeing if and - * how each pathspec matches all the names it calls this function - * with. A mark is left in the seen[] array for each pathspec element - * indicating the closest type of match that element achieved, so if - * seen[n] remains zero after multiple invocations, that means the nth - * pathspec did not match any names, which could indicate that the - * user mistyped the nth pathspec. - */ -static int do_match_pathspec(const struct index_state *istate, - const struct pathspec *ps, - const char *name, int namelen, - int prefix, char *seen, - unsigned flags) -{ - int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE; - - GUARD_PATHSPEC(ps, - PATHSPEC_FROMTOP | - PATHSPEC_MAXDEPTH | - PATHSPEC_LITERAL | - PATHSPEC_GLOB | - PATHSPEC_ICASE | - PATHSPEC_EXCLUDE | - PATHSPEC_ATTR); - - if (!ps->nr) { - if (!ps->recursive || - !(ps->magic & PATHSPEC_MAXDEPTH) || - ps->max_depth == -1) - return MATCHED_RECURSIVELY; - - if (within_depth(name, namelen, 0, ps->max_depth)) - return MATCHED_EXACTLY; - else - return 0; - } - - name += prefix; - namelen -= prefix; - - for (i = ps->nr - 1; i >= 0; i--) { - int how; - - if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || - ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) - continue; - - if (seen && seen[i] == MATCHED_EXACTLY) - continue; - /* - * Make exclude patterns optional and never report - * "pathspec ':(exclude)foo' matches no files" - */ - if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE) - seen[i] = MATCHED_FNMATCH; - how = match_pathspec_item(istate, ps->items+i, prefix, name, - namelen, flags); - if (ps->recursive && - (ps->magic & PATHSPEC_MAXDEPTH) && - ps->max_depth != -1 && - how && how != MATCHED_FNMATCH) { - int len = ps->items[i].len; - if (name[len] == '/') - len++; - if (within_depth(name+len, namelen-len, 0, ps->max_depth)) - how = MATCHED_EXACTLY; - else - how = 0; - } - if (how) { - if (retval < how) - retval = how; - if (seen && seen[i] < how) - seen[i] = how; - } - } - return retval; -} - -static int match_pathspec_with_flags(const struct index_state *istate, - const struct pathspec *ps, - const char *name, int namelen, - int prefix, char *seen, unsigned flags) -{ - int positive, negative; - positive = do_match_pathspec(istate, ps, name, namelen, - prefix, seen, flags); - if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive) - return positive; - negative = do_match_pathspec(istate, ps, name, namelen, - prefix, seen, - flags | DO_MATCH_EXCLUDE); - return negative ? 0 : positive; -} - -int match_pathspec(const struct index_state *istate, - const struct pathspec *ps, - const char *name, int namelen, - int prefix, char *seen, int is_dir) -{ - unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0; - return match_pathspec_with_flags(istate, ps, name, namelen, - prefix, seen, flags); -} - -/** - * Check if a submodule is a superset of the pathspec - */ -int submodule_path_match(const struct index_state *istate, - const struct pathspec *ps, - const char *submodule_name, - char *seen) -{ - int matched = match_pathspec_with_flags(istate, ps, submodule_name, - strlen(submodule_name), - 0, seen, - DO_MATCH_DIRECTORY | - DO_MATCH_LEADING_PATHSPEC); - return matched; -} - -int report_path_error(const char *ps_matched, - const struct pathspec *pathspec) -{ - /* - * Make sure all pathspec matched; otherwise it is an error. - */ - int num, errors = 0; - for (num = 0; num < pathspec->nr; num++) { - int other, found_dup; - - if (ps_matched[num]) - continue; - /* - * The caller might have fed identical pathspec - * twice. Do not barf on such a mistake. - * FIXME: parse_pathspec should have eliminated - * duplicate pathspec. - */ - for (found_dup = other = 0; - !found_dup && other < pathspec->nr; - other++) { - if (other == num || !ps_matched[other]) - continue; - if (!strcmp(pathspec->items[other].original, - pathspec->items[num].original)) - /* - * Ok, we have a match already. - */ - found_dup = 1; - } - if (found_dup) - continue; - - error(_("pathspec '%s' did not match any file(s) known to git"), - pathspec->items[num].original); - errors++; - } - return errors; -} - -/* - * Return the length of the "simple" part of a path match limiter. - */ -int simple_length(const char *match) -{ - int len = -1; - - for (;;) { - unsigned char c = *match++; - len++; - if (c == '\0' || is_glob_special(c)) - return len; - } -} - -int no_wildcard(const char *string) -{ - return string[simple_length(string)] == '\0'; -} - -void parse_path_pattern(const char **pattern, - int *patternlen, - unsigned *flags, - int *nowildcardlen) -{ - const char *p = *pattern; - size_t i, len; - - *flags = 0; - if (*p == '!') { - *flags |= PATTERN_FLAG_NEGATIVE; - p++; - } - len = strlen(p); - if (len && p[len - 1] == '/') { - len--; - *flags |= PATTERN_FLAG_MUSTBEDIR; - } - for (i = 0; i < len; i++) { - if (p[i] == '/') - break; - } - if (i == len) - *flags |= PATTERN_FLAG_NODIR; - *nowildcardlen = simple_length(p); - /* - * we should have excluded the trailing slash from 'p' too, - * but that's one more allocation. Instead just make sure - * nowildcardlen does not exceed real patternlen - */ - if (*nowildcardlen > len) - *nowildcardlen = len; - if (*p == '*' && no_wildcard(p + 1)) - *flags |= PATTERN_FLAG_ENDSWITH; - *pattern = p; - *patternlen = len; -} - -int pl_hashmap_cmp(const void *unused_cmp_data, - const struct hashmap_entry *a, - const struct hashmap_entry *b, - const void *key) -{ - const struct pattern_entry *ee1 = - container_of(a, struct pattern_entry, ent); - const struct pattern_entry *ee2 = - container_of(b, struct pattern_entry, ent); - - size_t min_len = ee1->patternlen <= ee2->patternlen - ? ee1->patternlen - : ee2->patternlen; - - if (ignore_case) - return strncasecmp(ee1->pattern, ee2->pattern, min_len); - return strncmp(ee1->pattern, ee2->pattern, min_len); -} - -static char *dup_and_filter_pattern(const char *pattern) -{ - char *set, *read; - size_t count = 0; - char *result = xstrdup(pattern); - - set = result; - read = result; - - while (*read) { - /* skip escape characters (once) */ - if (*read == '\\') - read++; - - *set = *read; - - set++; - read++; - count++; - } - *set = 0; - - if (count > 2 && - *(set - 1) == '*' && - *(set - 2) == '/') - *(set - 2) = 0; - - return result; -} - -static void add_pattern_to_hashsets(struct pattern_list *pl, struct path_pattern *given) -{ - struct pattern_entry *translated; - char *truncated; - char *data = NULL; - const char *prev, *cur, *next; - - if (!pl->use_cone_patterns) - return; - - if (given->flags & PATTERN_FLAG_NEGATIVE && - given->flags & PATTERN_FLAG_MUSTBEDIR && - !strcmp(given->pattern, "/*")) { - pl->full_cone = 0; - return; - } - - if (!given->flags && !strcmp(given->pattern, "/*")) { - pl->full_cone = 1; - return; - } - - if (given->patternlen < 2 || - *given->pattern == '*' || - strstr(given->pattern, "**")) { - /* Not a cone pattern. */ - warning(_("unrecognized pattern: '%s'"), given->pattern); - goto clear_hashmaps; - } - - prev = given->pattern; - cur = given->pattern + 1; - next = given->pattern + 2; - - while (*cur) { - /* Watch for glob characters '*', '\', '[', '?' */ - if (!is_glob_special(*cur)) - goto increment; - - /* But only if *prev != '\\' */ - if (*prev == '\\') - goto increment; - - /* But allow the initial '\' */ - if (*cur == '\\' && - is_glob_special(*next)) - goto increment; - - /* But a trailing '/' then '*' is fine */ - if (*prev == '/' && - *cur == '*' && - *next == 0) - goto increment; - - /* Not a cone pattern. */ - warning(_("unrecognized pattern: '%s'"), given->pattern); - goto clear_hashmaps; - - increment: - prev++; - cur++; - next++; - } - - if (given->patternlen > 2 && - !strcmp(given->pattern + given->patternlen - 2, "/*")) { - if (!(given->flags & PATTERN_FLAG_NEGATIVE)) { - /* Not a cone pattern. */ - warning(_("unrecognized pattern: '%s'"), given->pattern); - goto clear_hashmaps; - } - - truncated = dup_and_filter_pattern(given->pattern); - - translated = xmalloc(sizeof(struct pattern_entry)); - translated->pattern = truncated; - translated->patternlen = given->patternlen - 2; - hashmap_entry_init(&translated->ent, - ignore_case ? - strihash(translated->pattern) : - strhash(translated->pattern)); - - if (!hashmap_get_entry(&pl->recursive_hashmap, - translated, ent, NULL)) { - /* We did not see the "parent" included */ - warning(_("unrecognized negative pattern: '%s'"), - given->pattern); - free(truncated); - free(translated); - goto clear_hashmaps; - } - - hashmap_add(&pl->parent_hashmap, &translated->ent); - hashmap_remove(&pl->recursive_hashmap, &translated->ent, &data); - free(data); - return; - } - - if (given->flags & PATTERN_FLAG_NEGATIVE) { - warning(_("unrecognized negative pattern: '%s'"), - given->pattern); - goto clear_hashmaps; - } - - translated = xmalloc(sizeof(struct pattern_entry)); - - translated->pattern = dup_and_filter_pattern(given->pattern); - translated->patternlen = given->patternlen; - hashmap_entry_init(&translated->ent, - ignore_case ? - strihash(translated->pattern) : - strhash(translated->pattern)); - - hashmap_add(&pl->recursive_hashmap, &translated->ent); - - if (hashmap_get_entry(&pl->parent_hashmap, translated, ent, NULL)) { - /* we already included this at the parent level */ - warning(_("your sparse-checkout file may have issues: pattern '%s' is repeated"), - given->pattern); - hashmap_remove(&pl->parent_hashmap, &translated->ent, &data); - free(data); - free(translated); - } - - return; - -clear_hashmaps: - warning(_("disabling cone pattern matching")); - hashmap_free_entries(&pl->parent_hashmap, struct pattern_entry, ent); - hashmap_free_entries(&pl->recursive_hashmap, struct pattern_entry, ent); - pl->use_cone_patterns = 0; -} - -static int hashmap_contains_path(struct hashmap *map, - struct strbuf *pattern) -{ - struct pattern_entry p; - - /* Check straight mapping */ - p.pattern = pattern->buf; - p.patternlen = pattern->len; - hashmap_entry_init(&p.ent, - ignore_case ? - strihash(p.pattern) : - strhash(p.pattern)); - return !!hashmap_get_entry(map, &p, ent, NULL); -} - -int hashmap_contains_parent(struct hashmap *map, - const char *path, - struct strbuf *buffer) -{ - char *slash_pos; - - strbuf_setlen(buffer, 0); - - if (path[0] != '/') - strbuf_addch(buffer, '/'); - - strbuf_addstr(buffer, path); - - slash_pos = strrchr(buffer->buf, '/'); - - while (slash_pos > buffer->buf) { - strbuf_setlen(buffer, slash_pos - buffer->buf); - - if (hashmap_contains_path(map, buffer)) - return 1; - - slash_pos = strrchr(buffer->buf, '/'); - } - - return 0; -} - -void add_pattern(const char *string, const char *base, - int baselen, struct pattern_list *pl, int srcpos) -{ - struct path_pattern *pattern; - int patternlen; - unsigned flags; - int nowildcardlen; - - parse_path_pattern(&string, &patternlen, &flags, &nowildcardlen); - if (flags & PATTERN_FLAG_MUSTBEDIR) { - FLEXPTR_ALLOC_MEM(pattern, pattern, string, patternlen); - } else { - pattern = xmalloc(sizeof(*pattern)); - pattern->pattern = string; - } - pattern->patternlen = patternlen; - pattern->nowildcardlen = nowildcardlen; - pattern->base = base; - pattern->baselen = baselen; - pattern->flags = flags; - pattern->srcpos = srcpos; - ALLOC_GROW(pl->patterns, pl->nr + 1, pl->alloc); - pl->patterns[pl->nr++] = pattern; - pattern->pl = pl; - - add_pattern_to_hashsets(pl, pattern); -} - -static int read_skip_worktree_file_from_index(const struct index_state *istate, - const char *path, - size_t *size_out, char **data_out, - struct oid_stat *oid_stat) -{ - int pos, len; - - len = strlen(path); - pos = index_name_pos(istate, path, len); - if (pos < 0) - return -1; - if (!ce_skip_worktree(istate->cache[pos])) - return -1; - - return do_read_blob(&istate->cache[pos]->oid, oid_stat, size_out, data_out); -} - -/* - * Frees memory within pl which was allocated for exclude patterns and - * the file buffer. Does not free pl itself. - */ -void clear_pattern_list(struct pattern_list *pl) -{ - int i; - - for (i = 0; i < pl->nr; i++) - free(pl->patterns[i]); - free(pl->patterns); - free(pl->filebuf); - hashmap_free_entries(&pl->recursive_hashmap, struct pattern_entry, ent); - hashmap_free_entries(&pl->parent_hashmap, struct pattern_entry, ent); - - memset(pl, 0, sizeof(*pl)); -} - -static void trim_trailing_spaces(char *buf) -{ - char *p, *last_space = NULL; - - for (p = buf; *p; p++) - switch (*p) { - case ' ': - if (!last_space) - last_space = p; - break; - case '\\': - p++; - if (!*p) - return; - /* fallthrough */ - default: - last_space = NULL; - } - - if (last_space) - *last_space = '\0'; -} - -/* - * Given a subdirectory name and "dir" of the current directory, - * search the subdir in "dir" and return it, or create a new one if it - * does not exist in "dir". - * - * If "name" has the trailing slash, it'll be excluded in the search. - */ -static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, - struct untracked_cache_dir *dir, - const char *name, int len) -{ - int first, last; - struct untracked_cache_dir *d; - if (!dir) - return NULL; - if (len && name[len - 1] == '/') - len--; - first = 0; - last = dir->dirs_nr; - while (last > first) { - int cmp, next = first + ((last - first) >> 1); - d = dir->dirs[next]; - cmp = strncmp(name, d->name, len); - if (!cmp && strlen(d->name) > len) - cmp = -1; - if (!cmp) - return d; - if (cmp < 0) { - last = next; - continue; - } - first = next+1; - } - - uc->dir_created++; - FLEX_ALLOC_MEM(d, name, name, len); - - ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc); - MOVE_ARRAY(dir->dirs + first + 1, dir->dirs + first, - dir->dirs_nr - first); - dir->dirs_nr++; - dir->dirs[first] = d; - return d; -} - -static void do_invalidate_gitignore(struct untracked_cache_dir *dir) -{ - int i; - dir->valid = 0; - dir->untracked_nr = 0; - for (i = 0; i < dir->dirs_nr; i++) - do_invalidate_gitignore(dir->dirs[i]); -} - -static void invalidate_gitignore(struct untracked_cache *uc, - struct untracked_cache_dir *dir) -{ - uc->gitignore_invalidated++; - do_invalidate_gitignore(dir); -} - -static void invalidate_directory(struct untracked_cache *uc, - struct untracked_cache_dir *dir) -{ - int i; - - /* - * Invalidation increment here is just roughly correct. If - * untracked_nr or any of dirs[].recurse is non-zero, we - * should increment dir_invalidated too. But that's more - * expensive to do. - */ - if (dir->valid) - uc->dir_invalidated++; - - dir->valid = 0; - dir->untracked_nr = 0; - for (i = 0; i < dir->dirs_nr; i++) - dir->dirs[i]->recurse = 0; -} - -static int add_patterns_from_buffer(char *buf, size_t size, - const char *base, int baselen, - struct pattern_list *pl); - -/* - * Given a file with name "fname", read it (either from disk, or from - * an index if 'istate' is non-null), parse it and store the - * exclude rules in "pl". - * - * If "ss" is not NULL, compute SHA-1 of the exclude file and fill - * stat data from disk (only valid if add_patterns returns zero). If - * ss_valid is non-zero, "ss" must contain good value as input. - */ -static int add_patterns(const char *fname, const char *base, int baselen, - struct pattern_list *pl, struct index_state *istate, - struct oid_stat *oid_stat) -{ - struct stat st; - int r; - int fd; - size_t size = 0; - char *buf; - - fd = open(fname, O_RDONLY); - if (fd < 0 || fstat(fd, &st) < 0) { - if (fd < 0) - warn_on_fopen_errors(fname); - else - close(fd); - if (!istate) - return -1; - r = read_skip_worktree_file_from_index(istate, fname, - &size, &buf, - oid_stat); - if (r != 1) - return r; - } else { - size = xsize_t(st.st_size); - if (size == 0) { - if (oid_stat) { - fill_stat_data(&oid_stat->stat, &st); - oidcpy(&oid_stat->oid, the_hash_algo->empty_blob); - oid_stat->valid = 1; - } - close(fd); - return 0; - } - buf = xmallocz(size); - if (read_in_full(fd, buf, size) != size) { - free(buf); - close(fd); - return -1; - } - buf[size++] = '\n'; - close(fd); - if (oid_stat) { - int pos; - if (oid_stat->valid && - !match_stat_data_racy(istate, &oid_stat->stat, &st)) - ; /* no content change, ss->sha1 still good */ - else if (istate && - (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 && - !ce_stage(istate->cache[pos]) && - ce_uptodate(istate->cache[pos]) && - !would_convert_to_git(istate, fname)) - oidcpy(&oid_stat->oid, - &istate->cache[pos]->oid); - else - hash_object_file(the_hash_algo, buf, size, - "blob", &oid_stat->oid); - fill_stat_data(&oid_stat->stat, &st); - oid_stat->valid = 1; - } - } - - add_patterns_from_buffer(buf, size, base, baselen, pl); - return 0; -} - -static int add_patterns_from_buffer(char *buf, size_t size, - const char *base, int baselen, - struct pattern_list *pl) -{ - int i, lineno = 1; - char *entry; - - hashmap_init(&pl->recursive_hashmap, pl_hashmap_cmp, NULL, 0); - hashmap_init(&pl->parent_hashmap, pl_hashmap_cmp, NULL, 0); - - pl->filebuf = buf; - - if (skip_utf8_bom(&buf, size)) - size -= buf - pl->filebuf; - - entry = buf; - - for (i = 0; i < size; i++) { - if (buf[i] == '\n') { - if (entry != buf + i && entry[0] != '#') { - buf[i - (i && buf[i-1] == '\r')] = 0; - trim_trailing_spaces(entry); - add_pattern(entry, base, baselen, pl, lineno); - } - lineno++; - entry = buf + i + 1; - } - } - return 0; -} - -int add_patterns_from_file_to_list(const char *fname, const char *base, - int baselen, struct pattern_list *pl, - struct index_state *istate) -{ - return add_patterns(fname, base, baselen, pl, istate, NULL); -} - -int add_patterns_from_blob_to_list( - struct object_id *oid, - const char *base, int baselen, - struct pattern_list *pl) -{ - char *buf; - size_t size; - int r; - - r = do_read_blob(oid, NULL, &size, &buf); - if (r != 1) - return r; - - add_patterns_from_buffer(buf, size, base, baselen, pl); - return 0; -} - -struct pattern_list *add_pattern_list(struct dir_struct *dir, - int group_type, const char *src) -{ - struct pattern_list *pl; - struct exclude_list_group *group; - - group = &dir->exclude_list_group[group_type]; - ALLOC_GROW(group->pl, group->nr + 1, group->alloc); - pl = &group->pl[group->nr++]; - memset(pl, 0, sizeof(*pl)); - pl->src = src; - return pl; -} - -/* - * Used to set up core.excludesfile and .git/info/exclude lists. - */ -static void add_patterns_from_file_1(struct dir_struct *dir, const char *fname, - struct oid_stat *oid_stat) -{ - struct pattern_list *pl; - /* - * catch setup_standard_excludes() that's called before - * dir->untracked is assigned. That function behaves - * differently when dir->untracked is non-NULL. - */ - if (!dir->untracked) - dir->unmanaged_exclude_files++; - pl = add_pattern_list(dir, EXC_FILE, fname); - if (add_patterns(fname, "", 0, pl, NULL, oid_stat) < 0) - die(_("cannot use %s as an exclude file"), fname); -} - -void add_patterns_from_file(struct dir_struct *dir, const char *fname) -{ - dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ - add_patterns_from_file_1(dir, fname, NULL); -} - -int match_basename(const char *basename, int basenamelen, - const char *pattern, int prefix, int patternlen, - unsigned flags) -{ - if (prefix == patternlen) { - if (patternlen == basenamelen && - !fspathncmp(pattern, basename, basenamelen)) - return 1; - } else if (flags & PATTERN_FLAG_ENDSWITH) { - /* "*literal" matching against "fooliteral" */ - if (patternlen - 1 <= basenamelen && - !fspathncmp(pattern + 1, - basename + basenamelen - (patternlen - 1), - patternlen - 1)) - return 1; - } else { - if (fnmatch_icase_mem(pattern, patternlen, - basename, basenamelen, - 0) == 0) - return 1; - } - return 0; -} - -int match_pathname(const char *pathname, int pathlen, - const char *base, int baselen, - const char *pattern, int prefix, int patternlen, - unsigned flags) -{ - const char *name; - int namelen; - - /* - * match with FNM_PATHNAME; the pattern has base implicitly - * in front of it. - */ - if (*pattern == '/') { - pattern++; - patternlen--; - prefix--; - } - - /* - * baselen does not count the trailing slash. base[] may or - * may not end with a trailing slash though. - */ - if (pathlen < baselen + 1 || - (baselen && pathname[baselen] != '/') || - fspathncmp(pathname, base, baselen)) - return 0; - - namelen = baselen ? pathlen - baselen - 1 : pathlen; - name = pathname + pathlen - namelen; - - if (prefix) { - /* - * if the non-wildcard part is longer than the - * remaining pathname, surely it cannot match. - */ - if (prefix > namelen) - return 0; - - if (fspathncmp(pattern, name, prefix)) - return 0; - pattern += prefix; - patternlen -= prefix; - name += prefix; - namelen -= prefix; - - /* - * If the whole pattern did not have a wildcard, - * then our prefix match is all we need; we - * do not need to call fnmatch at all. - */ - if (!patternlen && !namelen) - return 1; - } - - return fnmatch_icase_mem(pattern, patternlen, - name, namelen, - WM_PATHNAME) == 0; -} - -/* - * Scan the given exclude list in reverse to see whether pathname - * should be ignored. The first match (i.e. the last on the list), if - * any, determines the fate. Returns the exclude_list element which - * matched, or NULL for undecided. - */ -static struct path_pattern *last_matching_pattern_from_list(const char *pathname, - int pathlen, - const char *basename, - int *dtype, - struct pattern_list *pl, - struct index_state *istate) -{ - struct path_pattern *res = NULL; /* undecided */ - int i; - - if (!pl->nr) - return NULL; /* undefined */ - - for (i = pl->nr - 1; 0 <= i; i--) { - struct path_pattern *pattern = pl->patterns[i]; - const char *exclude = pattern->pattern; - int prefix = pattern->nowildcardlen; - - if (pattern->flags & PATTERN_FLAG_MUSTBEDIR) { - *dtype = resolve_dtype(*dtype, istate, pathname, pathlen); - if (*dtype != DT_DIR) - continue; - } - - if (pattern->flags & PATTERN_FLAG_NODIR) { - if (match_basename(basename, - pathlen - (basename - pathname), - exclude, prefix, pattern->patternlen, - pattern->flags)) { - res = pattern; - break; - } - continue; - } - - assert(pattern->baselen == 0 || - pattern->base[pattern->baselen - 1] == '/'); - if (match_pathname(pathname, pathlen, - pattern->base, - pattern->baselen ? pattern->baselen - 1 : 0, - exclude, prefix, pattern->patternlen, - pattern->flags)) { - res = pattern; - break; - } - } - return res; -} - -/* - * Scan the list of patterns to determine if the ordered list - * of patterns matches on 'pathname'. - * - * Return 1 for a match, 0 for not matched and -1 for undecided. - */ -enum pattern_match_result path_matches_pattern_list( - const char *pathname, int pathlen, - const char *basename, int *dtype, - struct pattern_list *pl, - struct index_state *istate) -{ - struct path_pattern *pattern; - struct strbuf parent_pathname = STRBUF_INIT; - int result = NOT_MATCHED; - const char *slash_pos; - - if (!pl->use_cone_patterns) { - pattern = last_matching_pattern_from_list(pathname, pathlen, basename, - dtype, pl, istate); - if (pattern) { - if (pattern->flags & PATTERN_FLAG_NEGATIVE) - return NOT_MATCHED; - else - return MATCHED; - } - - return UNDECIDED; - } - - if (pl->full_cone) - return MATCHED; - - strbuf_addch(&parent_pathname, '/'); - strbuf_add(&parent_pathname, pathname, pathlen); - - if (hashmap_contains_path(&pl->recursive_hashmap, - &parent_pathname)) { - result = MATCHED_RECURSIVE; - goto done; - } - - slash_pos = strrchr(parent_pathname.buf, '/'); - - if (slash_pos == parent_pathname.buf) { - /* include every file in root */ - result = MATCHED; - goto done; - } - - strbuf_setlen(&parent_pathname, slash_pos - parent_pathname.buf); - - if (hashmap_contains_path(&pl->parent_hashmap, &parent_pathname)) { - result = MATCHED; - goto done; - } - - if (hashmap_contains_parent(&pl->recursive_hashmap, - pathname, - &parent_pathname)) - result = MATCHED_RECURSIVE; - -done: - strbuf_release(&parent_pathname); - return result; -} - -static struct path_pattern *last_matching_pattern_from_lists( - struct dir_struct *dir, struct index_state *istate, - const char *pathname, int pathlen, - const char *basename, int *dtype_p) -{ - int i, j; - struct exclude_list_group *group; - struct path_pattern *pattern; - for (i = EXC_CMDL; i <= EXC_FILE; i++) { - group = &dir->exclude_list_group[i]; - for (j = group->nr - 1; j >= 0; j--) { - pattern = last_matching_pattern_from_list( - pathname, pathlen, basename, dtype_p, - &group->pl[j], istate); - if (pattern) - return pattern; - } - } - return NULL; -} - -/* - * Loads the per-directory exclude list for the substring of base - * which has a char length of baselen. - */ -static void prep_exclude(struct dir_struct *dir, - struct index_state *istate, - const char *base, int baselen) -{ - struct exclude_list_group *group; - struct pattern_list *pl; - struct exclude_stack *stk = NULL; - struct untracked_cache_dir *untracked; - int current; - - group = &dir->exclude_list_group[EXC_DIRS]; - - /* - * Pop the exclude lists from the EXCL_DIRS exclude_list_group - * which originate from directories not in the prefix of the - * path being checked. - */ - while ((stk = dir->exclude_stack) != NULL) { - if (stk->baselen <= baselen && - !strncmp(dir->basebuf.buf, base, stk->baselen)) - break; - pl = &group->pl[dir->exclude_stack->exclude_ix]; - dir->exclude_stack = stk->prev; - dir->pattern = NULL; - free((char *)pl->src); /* see strbuf_detach() below */ - clear_pattern_list(pl); - free(stk); - group->nr--; - } - - /* Skip traversing into sub directories if the parent is excluded */ - if (dir->pattern) - return; - - /* - * Lazy initialization. All call sites currently just - * memset(dir, 0, sizeof(*dir)) before use. Changing all of - * them seems lots of work for little benefit. - */ - if (!dir->basebuf.buf) - strbuf_init(&dir->basebuf, PATH_MAX); - - /* Read from the parent directories and push them down. */ - current = stk ? stk->baselen : -1; - strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current); - if (dir->untracked) - untracked = stk ? stk->ucd : dir->untracked->root; - else - untracked = NULL; - - while (current < baselen) { - const char *cp; - struct oid_stat oid_stat; - - stk = xcalloc(1, sizeof(*stk)); - if (current < 0) { - cp = base; - current = 0; - } else { - cp = strchr(base + current + 1, '/'); - if (!cp) - die("oops in prep_exclude"); - cp++; - untracked = - lookup_untracked(dir->untracked, untracked, - base + current, - cp - base - current); - } - stk->prev = dir->exclude_stack; - stk->baselen = cp - base; - stk->exclude_ix = group->nr; - stk->ucd = untracked; - pl = add_pattern_list(dir, EXC_DIRS, NULL); - strbuf_add(&dir->basebuf, base + current, stk->baselen - current); - assert(stk->baselen == dir->basebuf.len); - - /* Abort if the directory is excluded */ - if (stk->baselen) { - int dt = DT_DIR; - dir->basebuf.buf[stk->baselen - 1] = 0; - dir->pattern = last_matching_pattern_from_lists(dir, - istate, - dir->basebuf.buf, stk->baselen - 1, - dir->basebuf.buf + current, &dt); - dir->basebuf.buf[stk->baselen - 1] = '/'; - if (dir->pattern && - dir->pattern->flags & PATTERN_FLAG_NEGATIVE) - dir->pattern = NULL; - if (dir->pattern) { - dir->exclude_stack = stk; - return; - } - } - - /* Try to read per-directory file */ - oidclr(&oid_stat.oid); - oid_stat.valid = 0; - if (dir->exclude_per_dir && - /* - * If we know that no files have been added in - * this directory (i.e. valid_cached_dir() has - * been executed and set untracked->valid) .. - */ - (!untracked || !untracked->valid || - /* - * .. and .gitignore does not exist before - * (i.e. null exclude_oid). Then we can skip - * loading .gitignore, which would result in - * ENOENT anyway. - */ - !is_null_oid(&untracked->exclude_oid))) { - /* - * dir->basebuf gets reused by the traversal, but we - * need fname to remain unchanged to ensure the src - * member of each struct path_pattern correctly - * back-references its source file. Other invocations - * of add_pattern_list provide stable strings, so we - * strbuf_detach() and free() here in the caller. - */ - struct strbuf sb = STRBUF_INIT; - strbuf_addbuf(&sb, &dir->basebuf); - strbuf_addstr(&sb, dir->exclude_per_dir); - pl->src = strbuf_detach(&sb, NULL); - add_patterns(pl->src, pl->src, stk->baselen, pl, istate, - untracked ? &oid_stat : NULL); - } - /* - * NEEDSWORK: when untracked cache is enabled, prep_exclude() - * will first be called in valid_cached_dir() then maybe many - * times more in last_matching_pattern(). When the cache is - * used, last_matching_pattern() will not be called and - * reading .gitignore content will be a waste. - * - * So when it's called by valid_cached_dir() and we can get - * .gitignore SHA-1 from the index (i.e. .gitignore is not - * modified on work tree), we could delay reading the - * .gitignore content until we absolutely need it in - * last_matching_pattern(). Be careful about ignore rule - * order, though, if you do that. - */ - if (untracked && - !oideq(&oid_stat.oid, &untracked->exclude_oid)) { - invalidate_gitignore(dir->untracked, untracked); - oidcpy(&untracked->exclude_oid, &oid_stat.oid); - } - dir->exclude_stack = stk; - current = stk->baselen; - } - strbuf_setlen(&dir->basebuf, baselen); -} - -/* - * Loads the exclude lists for the directory containing pathname, then - * scans all exclude lists to determine whether pathname is excluded. - * Returns the exclude_list element which matched, or NULL for - * undecided. - */ -struct path_pattern *last_matching_pattern(struct dir_struct *dir, - struct index_state *istate, - const char *pathname, - int *dtype_p) -{ - int pathlen = strlen(pathname); - const char *basename = strrchr(pathname, '/'); - basename = (basename) ? basename+1 : pathname; - - prep_exclude(dir, istate, pathname, basename-pathname); - - if (dir->pattern) - return dir->pattern; - - return last_matching_pattern_from_lists(dir, istate, pathname, pathlen, - basename, dtype_p); -} - -/* - * Loads the exclude lists for the directory containing pathname, then - * scans all exclude lists to determine whether pathname is excluded. - * Returns 1 if true, otherwise 0. - */ -int is_excluded(struct dir_struct *dir, struct index_state *istate, - const char *pathname, int *dtype_p) -{ - struct path_pattern *pattern = - last_matching_pattern(dir, istate, pathname, dtype_p); - if (pattern) - return pattern->flags & PATTERN_FLAG_NEGATIVE ? 0 : 1; - return 0; -} - -static struct dir_entry *dir_entry_new(const char *pathname, int len) -{ - struct dir_entry *ent; - - FLEX_ALLOC_MEM(ent, name, pathname, len); - ent->len = len; - return ent; -} - -static struct dir_entry *dir_add_name(struct dir_struct *dir, - struct index_state *istate, - const char *pathname, int len) -{ - if (index_file_exists(istate, pathname, len, ignore_case)) - return NULL; - - ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc); - return dir->entries[dir->nr++] = dir_entry_new(pathname, len); -} - -struct dir_entry *dir_add_ignored(struct dir_struct *dir, - struct index_state *istate, - const char *pathname, int len) -{ - if (!index_name_is_other(istate, pathname, len)) - return NULL; - - ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc); - return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len); -} - -enum exist_status { - index_nonexistent = 0, - index_directory, - index_gitdir -}; - -/* - * Do not use the alphabetically sorted index to look up - * the directory name; instead, use the case insensitive - * directory hash. - */ -static enum exist_status directory_exists_in_index_icase(struct index_state *istate, - const char *dirname, int len) -{ - struct cache_entry *ce; - - if (index_dir_exists(istate, dirname, len)) - return index_directory; - - ce = index_file_exists(istate, dirname, len, ignore_case); - if (ce && S_ISGITLINK(ce->ce_mode)) - return index_gitdir; - - return index_nonexistent; -} - -/* - * The index sorts alphabetically by entry name, which - * means that a gitlink sorts as '\0' at the end, while - * a directory (which is defined not as an entry, but as - * the files it contains) will sort with the '/' at the - * end. - */ -static enum exist_status directory_exists_in_index(struct index_state *istate, - const char *dirname, int len) -{ - int pos; - - if (ignore_case) - return directory_exists_in_index_icase(istate, dirname, len); - - pos = index_name_pos(istate, dirname, len); - if (pos < 0) - pos = -pos-1; - while (pos < istate->cache_nr) { - const struct cache_entry *ce = istate->cache[pos++]; - unsigned char endchar; - - if (strncmp(ce->name, dirname, len)) - break; - endchar = ce->name[len]; - if (endchar > '/') - break; - if (endchar == '/') - return index_directory; - if (!endchar && S_ISGITLINK(ce->ce_mode)) - return index_gitdir; - } - return index_nonexistent; -} - -/* - * When we find a directory when traversing the filesystem, we - * have three distinct cases: - * - * - ignore it - * - see it as a directory - * - recurse into it - * - * and which one we choose depends on a combination of existing - * git index contents and the flags passed into the directory - * traversal routine. - * - * Case 1: If we *already* have entries in the index under that - * directory name, we always recurse into the directory to see - * all the files. - * - * Case 2: If we *already* have that directory name as a gitlink, - * we always continue to see it as a gitlink, regardless of whether - * there is an actual git directory there or not (it might not - * be checked out as a subproject!) - * - * Case 3: if we didn't have it in the index previously, we - * have a few sub-cases: - * - * (a) if "show_other_directories" is true, we show it as - * just a directory, unless "hide_empty_directories" is - * also true, in which case we need to check if it contains any - * untracked and / or ignored files. - * (b) if it looks like a git directory, and we don't have - * 'no_gitlinks' set we treat it as a gitlink, and show it - * as a directory. - * (c) otherwise, we recurse into it. - */ -static enum path_treatment treat_directory(struct dir_struct *dir, - struct index_state *istate, - struct untracked_cache_dir *untracked, - const char *dirname, int len, int baselen, int excluded, - const struct pathspec *pathspec) -{ - /* - * WARNING: From this function, you can return path_recurse or you - * can call read_directory_recursive() (or neither), but - * you CAN'T DO BOTH. - */ - enum path_treatment state; - int matches_how = 0; - int nested_repo = 0, check_only, stop_early; - int old_ignored_nr, old_untracked_nr; - /* The "len-1" is to strip the final '/' */ - enum exist_status status = directory_exists_in_index(istate, dirname, len-1); - - if (status == index_directory) - return path_recurse; - if (status == index_gitdir) - return path_none; - if (status != index_nonexistent) - BUG("Unhandled value for directory_exists_in_index: %d\n", status); - - /* - * We don't want to descend into paths that don't match the necessary - * patterns. Clearly, if we don't have a pathspec, then we can't check - * for matching patterns. Also, if (excluded) then we know we matched - * the exclusion patterns so as an optimization we can skip checking - * for matching patterns. - */ - if (pathspec && !excluded) { - matches_how = match_pathspec_with_flags(istate, pathspec, - dirname, len, - 0 /* prefix */, - NULL /* seen */, - DO_MATCH_LEADING_PATHSPEC); - if (!matches_how) - return path_none; - } - - - if ((dir->flags & DIR_SKIP_NESTED_GIT) || - !(dir->flags & DIR_NO_GITLINKS)) { - struct strbuf sb = STRBUF_INIT; - strbuf_addstr(&sb, dirname); - nested_repo = is_nonbare_repository_dir(&sb); - strbuf_release(&sb); - } - if (nested_repo) { - if ((dir->flags & DIR_SKIP_NESTED_GIT) || - (matches_how == MATCHED_RECURSIVELY_LEADING_PATHSPEC)) - return path_none; - return excluded ? path_excluded : path_untracked; - } - - if (!(dir->flags & DIR_SHOW_OTHER_DIRECTORIES)) { - if (excluded && - (dir->flags & DIR_SHOW_IGNORED_TOO) && - (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) { - - /* - * This is an excluded directory and we are - * showing ignored paths that match an exclude - * pattern. (e.g. show directory as ignored - * only if it matches an exclude pattern). - * This path will either be 'path_excluded` - * (if we are showing empty directories or if - * the directory is not empty), or will be - * 'path_none' (empty directory, and we are - * not showing empty directories). - */ - if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES)) - return path_excluded; - - if (read_directory_recursive(dir, istate, dirname, len, - untracked, 1, 1, pathspec) == path_excluded) - return path_excluded; - - return path_none; - } - return path_recurse; - } - - /* This is the "show_other_directories" case */ - - /* - * If we have a pathspec which could match something _below_ this - * directory (e.g. when checking 'subdir/' having a pathspec like - * 'subdir/some/deep/path/file' or 'subdir/widget-*.c'), then we - * need to recurse. - */ - if (matches_how == MATCHED_RECURSIVELY_LEADING_PATHSPEC) - return path_recurse; - - /* - * Other than the path_recurse case immediately above, we only need - * to recurse into untracked/ignored directories if either of the - * following bits is set: - * - DIR_SHOW_IGNORED_TOO (because then we need to determine if - * there are ignored entries below) - * - DIR_HIDE_EMPTY_DIRECTORIES (because we have to determine if - * the directory is empty) - */ - if (!(dir->flags & (DIR_SHOW_IGNORED_TOO | DIR_HIDE_EMPTY_DIRECTORIES))) - return excluded ? path_excluded : path_untracked; - - /* - * ...and even if DIR_SHOW_IGNORED_TOO is set, we can still avoid - * recursing into ignored directories if the path is excluded and - * DIR_SHOW_IGNORED_TOO_MODE_MATCHING is also set. - */ - if (excluded && - (dir->flags & DIR_SHOW_IGNORED_TOO) && - (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) - return path_excluded; - - /* - * Even if we don't want to know all the paths under an untracked or - * ignored directory, we may still need to go into the directory to - * determine if it is empty (because with DIR_HIDE_EMPTY_DIRECTORIES, - * an empty directory should be path_none instead of path_excluded or - * path_untracked). - */ - check_only = ((dir->flags & DIR_HIDE_EMPTY_DIRECTORIES) && - !(dir->flags & DIR_SHOW_IGNORED_TOO)); - - /* - * However, there's another optimization possible as a subset of - * check_only, based on the cases we have to consider: - * A) Directory matches no exclude patterns: - * * Directory is empty => path_none - * * Directory has an untracked file under it => path_untracked - * * Directory has only ignored files under it => path_excluded - * B) Directory matches an exclude pattern: - * * Directory is empty => path_none - * * Directory has an untracked file under it => path_excluded - * * Directory has only ignored files under it => path_excluded - * In case A, we can exit as soon as we've found an untracked - * file but otherwise have to walk all files. In case B, though, - * we can stop at the first file we find under the directory. - */ - stop_early = check_only && excluded; - - /* - * If /every/ file within an untracked directory is ignored, then - * we want to treat the directory as ignored (for e.g. status - * --porcelain), without listing the individual ignored files - * underneath. To do so, we'll save the current ignored_nr, and - * pop all the ones added after it if it turns out the entire - * directory is ignored. Also, when DIR_SHOW_IGNORED_TOO and - * !DIR_KEEP_UNTRACKED_CONTENTS then we don't want to show - * untracked paths so will need to pop all those off the last - * after we traverse. - */ - old_ignored_nr = dir->ignored_nr; - old_untracked_nr = dir->nr; - - /* Actually recurse into dirname now, we'll fixup the state later. */ - untracked = lookup_untracked(dir->untracked, untracked, - dirname + baselen, len - baselen); - state = read_directory_recursive(dir, istate, dirname, len, untracked, - check_only, stop_early, pathspec); - - /* There are a variety of reasons we may need to fixup the state... */ - if (state == path_excluded) { - /* state == path_excluded implies all paths under - * dirname were ignored... - * - * if running e.g. `git status --porcelain --ignored=matching`, - * then we want to see the subpaths that are ignored. - * - * if running e.g. just `git status --porcelain`, then - * we just want the directory itself to be listed as ignored - * and not the individual paths underneath. - */ - int want_ignored_subpaths = - ((dir->flags & DIR_SHOW_IGNORED_TOO) && - (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)); - - if (want_ignored_subpaths) { - /* - * with --ignored=matching, we want the subpaths - * INSTEAD of the directory itself. - */ - state = path_none; - } else { - int i; - for (i = old_ignored_nr + 1; i<dir->ignored_nr; ++i) - FREE_AND_NULL(dir->ignored[i]); - dir->ignored_nr = old_ignored_nr; - } - } - - /* - * We may need to ignore some of the untracked paths we found while - * traversing subdirectories. - */ - if ((dir->flags & DIR_SHOW_IGNORED_TOO) && - !(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) { - int i; - for (i = old_untracked_nr + 1; i<dir->nr; ++i) - FREE_AND_NULL(dir->entries[i]); - dir->nr = old_untracked_nr; - } - - /* - * If there is nothing under the current directory and we are not - * hiding empty directories, then we need to report on the - * untracked or ignored status of the directory itself. - */ - if (state == path_none && !(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES)) - state = excluded ? path_excluded : path_untracked; - - return state; -} - -/* - * This is an inexact early pruning of any recursive directory - * reading - if the path cannot possibly be in the pathspec, - * return true, and we'll skip it early. - */ -static int simplify_away(const char *path, int pathlen, - const struct pathspec *pathspec) -{ - int i; - - if (!pathspec || !pathspec->nr) - return 0; - - GUARD_PATHSPEC(pathspec, - PATHSPEC_FROMTOP | - PATHSPEC_MAXDEPTH | - PATHSPEC_LITERAL | - PATHSPEC_GLOB | - PATHSPEC_ICASE | - PATHSPEC_EXCLUDE | - PATHSPEC_ATTR); - - for (i = 0; i < pathspec->nr; i++) { - const struct pathspec_item *item = &pathspec->items[i]; - int len = item->nowildcard_len; - - if (len > pathlen) - len = pathlen; - if (!ps_strncmp(item, item->match, path, len)) - return 0; - } - - return 1; -} - -/* - * This function tells us whether an excluded path matches a - * list of "interesting" pathspecs. That is, whether a path matched - * by any of the pathspecs could possibly be ignored by excluding - * the specified path. This can happen if: - * - * 1. the path is mentioned explicitly in the pathspec - * - * 2. the path is a directory prefix of some element in the - * pathspec - */ -static int exclude_matches_pathspec(const char *path, int pathlen, - const struct pathspec *pathspec) -{ - int i; - - if (!pathspec || !pathspec->nr) - return 0; - - GUARD_PATHSPEC(pathspec, - PATHSPEC_FROMTOP | - PATHSPEC_MAXDEPTH | - PATHSPEC_LITERAL | - PATHSPEC_GLOB | - PATHSPEC_ICASE | - PATHSPEC_EXCLUDE); - - for (i = 0; i < pathspec->nr; i++) { - const struct pathspec_item *item = &pathspec->items[i]; - int len = item->nowildcard_len; - - if (len == pathlen && - !ps_strncmp(item, item->match, path, pathlen)) - return 1; - if (len > pathlen && - item->match[pathlen] == '/' && - !ps_strncmp(item, item->match, path, pathlen)) - return 1; - } - return 0; -} - -static int get_index_dtype(struct index_state *istate, - const char *path, int len) -{ - int pos; - const struct cache_entry *ce; - - ce = index_file_exists(istate, path, len, 0); - if (ce) { - if (!ce_uptodate(ce)) - return DT_UNKNOWN; - if (S_ISGITLINK(ce->ce_mode)) - return DT_DIR; - /* - * Nobody actually cares about the - * difference between DT_LNK and DT_REG - */ - return DT_REG; - } - - /* Try to look it up as a directory */ - pos = index_name_pos(istate, path, len); - if (pos >= 0) - return DT_UNKNOWN; - pos = -pos-1; - while (pos < istate->cache_nr) { - ce = istate->cache[pos++]; - if (strncmp(ce->name, path, len)) - break; - if (ce->name[len] > '/') - break; - if (ce->name[len] < '/') - continue; - if (!ce_uptodate(ce)) - break; /* continue? */ - return DT_DIR; - } - return DT_UNKNOWN; -} - -static int resolve_dtype(int dtype, struct index_state *istate, - const char *path, int len) -{ - struct stat st; - - if (dtype != DT_UNKNOWN) - return dtype; - dtype = get_index_dtype(istate, path, len); - if (dtype != DT_UNKNOWN) - return dtype; - if (lstat(path, &st)) - return dtype; - if (S_ISREG(st.st_mode)) - return DT_REG; - if (S_ISDIR(st.st_mode)) - return DT_DIR; - if (S_ISLNK(st.st_mode)) - return DT_LNK; - return dtype; -} - -static enum path_treatment treat_path_fast(struct dir_struct *dir, - struct cached_dir *cdir, - struct index_state *istate, - struct strbuf *path, - int baselen, - const struct pathspec *pathspec) -{ - /* - * WARNING: From this function, you can return path_recurse or you - * can call read_directory_recursive() (or neither), but - * you CAN'T DO BOTH. - */ - strbuf_setlen(path, baselen); - if (!cdir->ucd) { - strbuf_addstr(path, cdir->file); - return path_untracked; - } - strbuf_addstr(path, cdir->ucd->name); - /* treat_one_path() does this before it calls treat_directory() */ - strbuf_complete(path, '/'); - if (cdir->ucd->check_only) - /* - * check_only is set as a result of treat_directory() getting - * to its bottom. Verify again the same set of directories - * with check_only set. - */ - return read_directory_recursive(dir, istate, path->buf, path->len, - cdir->ucd, 1, 0, pathspec); - /* - * We get path_recurse in the first run when - * directory_exists_in_index() returns index_nonexistent. We - * are sure that new changes in the index does not impact the - * outcome. Return now. - */ - return path_recurse; -} - -static enum path_treatment treat_path(struct dir_struct *dir, - struct untracked_cache_dir *untracked, - struct cached_dir *cdir, - struct index_state *istate, - struct strbuf *path, - int baselen, - const struct pathspec *pathspec) -{ - int has_path_in_index, dtype, excluded; - - if (!cdir->d_name) - return treat_path_fast(dir, cdir, istate, path, - baselen, pathspec); - if (is_dot_or_dotdot(cdir->d_name) || !fspathcmp(cdir->d_name, ".git")) - return path_none; - strbuf_setlen(path, baselen); - strbuf_addstr(path, cdir->d_name); - if (simplify_away(path->buf, path->len, pathspec)) - return path_none; - - dtype = resolve_dtype(cdir->d_type, istate, path->buf, path->len); - - /* Always exclude indexed files */ - has_path_in_index = !!index_file_exists(istate, path->buf, path->len, - ignore_case); - if (dtype != DT_DIR && has_path_in_index) - return path_none; - - /* - * When we are looking at a directory P in the working tree, - * there are three cases: - * - * (1) P exists in the index. Everything inside the directory P in - * the working tree needs to go when P is checked out from the - * index. - * - * (2) P does not exist in the index, but there is P/Q in the index. - * We know P will stay a directory when we check out the contents - * of the index, but we do not know yet if there is a directory - * P/Q in the working tree to be killed, so we need to recurse. - * - * (3) P does not exist in the index, and there is no P/Q in the index - * to require P to be a directory, either. Only in this case, we - * know that everything inside P will not be killed without - * recursing. - */ - if ((dir->flags & DIR_COLLECT_KILLED_ONLY) && - (dtype == DT_DIR) && - !has_path_in_index && - (directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent)) - return path_none; - - excluded = is_excluded(dir, istate, path->buf, &dtype); - - /* - * Excluded? If we don't explicitly want to show - * ignored files, ignore it - */ - if (excluded && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO))) - return path_excluded; - - switch (dtype) { - default: - return path_none; - case DT_DIR: - /* - * WARNING: Do not ignore/amend the return value from - * treat_directory(), and especially do not change it to return - * path_recurse as that can cause exponential slowdown. - * Instead, modify treat_directory() to return the right value. - */ - strbuf_addch(path, '/'); - return treat_directory(dir, istate, untracked, - path->buf, path->len, - baselen, excluded, pathspec); - case DT_REG: - case DT_LNK: - if (pathspec && - !match_pathspec(istate, pathspec, path->buf, path->len, - 0 /* prefix */, NULL /* seen */, - 0 /* is_dir */)) - return path_none; - if (excluded) - return path_excluded; - return path_untracked; - } -} - -static void add_untracked(struct untracked_cache_dir *dir, const char *name) -{ - if (!dir) - return; - ALLOC_GROW(dir->untracked, dir->untracked_nr + 1, - dir->untracked_alloc); - dir->untracked[dir->untracked_nr++] = xstrdup(name); -} - -static int valid_cached_dir(struct dir_struct *dir, - struct untracked_cache_dir *untracked, - struct index_state *istate, - struct strbuf *path, - int check_only) -{ - struct stat st; - - if (!untracked) - return 0; - - /* - * With fsmonitor, we can trust the untracked cache's valid field. - */ - refresh_fsmonitor(istate); - if (!(dir->untracked->use_fsmonitor && untracked->valid)) { - if (lstat(path->len ? path->buf : ".", &st)) { - memset(&untracked->stat_data, 0, sizeof(untracked->stat_data)); - return 0; - } - if (!untracked->valid || - match_stat_data_racy(istate, &untracked->stat_data, &st)) { - fill_stat_data(&untracked->stat_data, &st); - return 0; - } - } - - if (untracked->check_only != !!check_only) - return 0; - - /* - * prep_exclude will be called eventually on this directory, - * but it's called much later in last_matching_pattern(). We - * need it now to determine the validity of the cache for this - * path. The next calls will be nearly no-op, the way - * prep_exclude() is designed. - */ - if (path->len && path->buf[path->len - 1] != '/') { - strbuf_addch(path, '/'); - prep_exclude(dir, istate, path->buf, path->len); - strbuf_setlen(path, path->len - 1); - } else - prep_exclude(dir, istate, path->buf, path->len); - - /* hopefully prep_exclude() haven't invalidated this entry... */ - return untracked->valid; -} - -static int open_cached_dir(struct cached_dir *cdir, - struct dir_struct *dir, - struct untracked_cache_dir *untracked, - struct index_state *istate, - struct strbuf *path, - int check_only) -{ - const char *c_path; - - memset(cdir, 0, sizeof(*cdir)); - cdir->untracked = untracked; - if (valid_cached_dir(dir, untracked, istate, path, check_only)) - return 0; - c_path = path->len ? path->buf : "."; - cdir->fdir = opendir(c_path); - if (!cdir->fdir) - warning_errno(_("could not open directory '%s'"), c_path); - if (dir->untracked) { - invalidate_directory(dir->untracked, untracked); - dir->untracked->dir_opened++; - } - if (!cdir->fdir) - return -1; - return 0; -} - -static int read_cached_dir(struct cached_dir *cdir) -{ - struct dirent *de; - - if (cdir->fdir) { - de = readdir(cdir->fdir); - if (!de) { - cdir->d_name = NULL; - cdir->d_type = DT_UNKNOWN; - return -1; - } - cdir->d_name = de->d_name; - cdir->d_type = DTYPE(de); - return 0; - } - while (cdir->nr_dirs < cdir->untracked->dirs_nr) { - struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs]; - if (!d->recurse) { - cdir->nr_dirs++; - continue; - } - cdir->ucd = d; - cdir->nr_dirs++; - return 0; - } - cdir->ucd = NULL; - if (cdir->nr_files < cdir->untracked->untracked_nr) { - struct untracked_cache_dir *d = cdir->untracked; - cdir->file = d->untracked[cdir->nr_files++]; - return 0; - } - return -1; -} - -static void close_cached_dir(struct cached_dir *cdir) -{ - if (cdir->fdir) - closedir(cdir->fdir); - /* - * We have gone through this directory and found no untracked - * entries. Mark it valid. - */ - if (cdir->untracked) { - cdir->untracked->valid = 1; - cdir->untracked->recurse = 1; - } -} - -static void add_path_to_appropriate_result_list(struct dir_struct *dir, - struct untracked_cache_dir *untracked, - struct cached_dir *cdir, - struct index_state *istate, - struct strbuf *path, - int baselen, - const struct pathspec *pathspec, - enum path_treatment state) -{ - /* add the path to the appropriate result list */ - switch (state) { - case path_excluded: - if (dir->flags & DIR_SHOW_IGNORED) - dir_add_name(dir, istate, path->buf, path->len); - else if ((dir->flags & DIR_SHOW_IGNORED_TOO) || - ((dir->flags & DIR_COLLECT_IGNORED) && - exclude_matches_pathspec(path->buf, path->len, - pathspec))) - dir_add_ignored(dir, istate, path->buf, path->len); - break; - - case path_untracked: - if (dir->flags & DIR_SHOW_IGNORED) - break; - dir_add_name(dir, istate, path->buf, path->len); - if (cdir->fdir) - add_untracked(untracked, path->buf + baselen); - break; - - default: - break; - } -} - -/* - * Read a directory tree. We currently ignore anything but - * directories, regular files and symlinks. That's because git - * doesn't handle them at all yet. Maybe that will change some - * day. - * - * Also, we ignore the name ".git" (even if it is not a directory). - * That likely will not change. - * - * If 'stop_at_first_file' is specified, 'path_excluded' is returned - * to signal that a file was found. This is the least significant value that - * indicates that a file was encountered that does not depend on the order of - * whether an untracked or excluded path was encountered first. - * - * Returns the most significant path_treatment value encountered in the scan. - * If 'stop_at_first_file' is specified, `path_excluded` is the most - * significant path_treatment value that will be returned. - */ - -static enum path_treatment read_directory_recursive(struct dir_struct *dir, - struct index_state *istate, const char *base, int baselen, - struct untracked_cache_dir *untracked, int check_only, - int stop_at_first_file, const struct pathspec *pathspec) -{ - /* - * WARNING: Do NOT recurse unless path_recurse is returned from - * treat_path(). Recursing on any other return value - * can result in exponential slowdown. - */ - struct cached_dir cdir; - enum path_treatment state, subdir_state, dir_state = path_none; - struct strbuf path = STRBUF_INIT; - - strbuf_add(&path, base, baselen); - - if (open_cached_dir(&cdir, dir, untracked, istate, &path, check_only)) - goto out; - - if (untracked) - untracked->check_only = !!check_only; - - while (!read_cached_dir(&cdir)) { - /* check how the file or directory should be treated */ - state = treat_path(dir, untracked, &cdir, istate, &path, - baselen, pathspec); - - if (state > dir_state) - dir_state = state; - - /* recurse into subdir if instructed by treat_path */ - if (state == path_recurse) { - struct untracked_cache_dir *ud; - ud = lookup_untracked(dir->untracked, untracked, - path.buf + baselen, - path.len - baselen); - subdir_state = - read_directory_recursive(dir, istate, path.buf, - path.len, ud, - check_only, stop_at_first_file, pathspec); - if (subdir_state > dir_state) - dir_state = subdir_state; - - if (pathspec && - !match_pathspec(istate, pathspec, path.buf, path.len, - 0 /* prefix */, NULL, - 0 /* do NOT special case dirs */)) - state = path_none; - } - - if (check_only) { - if (stop_at_first_file) { - /* - * If stopping at first file, then - * signal that a file was found by - * returning `path_excluded`. This is - * to return a consistent value - * regardless of whether an ignored or - * excluded file happened to be - * encountered 1st. - * - * In current usage, the - * `stop_at_first_file` is passed when - * an ancestor directory has matched - * an exclude pattern, so any found - * files will be excluded. - */ - if (dir_state >= path_excluded) { - dir_state = path_excluded; - break; - } - } - - /* abort early if maximum state has been reached */ - if (dir_state == path_untracked) { - if (cdir.fdir) - add_untracked(untracked, path.buf + baselen); - break; - } - /* skip the add_path_to_appropriate_result_list() */ - continue; - } - - add_path_to_appropriate_result_list(dir, untracked, &cdir, - istate, &path, baselen, - pathspec, state); - } - close_cached_dir(&cdir); - out: - strbuf_release(&path); - - return dir_state; -} - -int cmp_dir_entry(const void *p1, const void *p2) -{ - const struct dir_entry *e1 = *(const struct dir_entry **)p1; - const struct dir_entry *e2 = *(const struct dir_entry **)p2; - - return name_compare(e1->name, e1->len, e2->name, e2->len); -} - -/* check if *out lexically strictly contains *in */ -int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in) -{ - return (out->len < in->len) && - (out->name[out->len - 1] == '/') && - !memcmp(out->name, in->name, out->len); -} - -static int treat_leading_path(struct dir_struct *dir, - struct index_state *istate, - const char *path, int len, - const struct pathspec *pathspec) -{ - struct strbuf sb = STRBUF_INIT; - struct strbuf subdir = STRBUF_INIT; - int prevlen, baselen; - const char *cp; - struct cached_dir cdir; - enum path_treatment state = path_none; - - /* - * For each directory component of path, we are going to check whether - * that path is relevant given the pathspec. For example, if path is - * foo/bar/baz/ - * then we will ask treat_path() whether we should go into foo, then - * whether we should go into bar, then whether baz is relevant. - * Checking each is important because e.g. if path is - * .git/info/ - * then we need to check .git to know we shouldn't traverse it. - * If the return from treat_path() is: - * * path_none, for any path, we return false. - * * path_recurse, for all path components, we return true - * * <anything else> for some intermediate component, we make sure - * to add that path to the relevant list but return false - * signifying that we shouldn't recurse into it. - */ - - while (len && path[len - 1] == '/') - len--; - if (!len) - return 1; - - memset(&cdir, 0, sizeof(cdir)); - cdir.d_type = DT_DIR; - baselen = 0; - prevlen = 0; - while (1) { - prevlen = baselen + !!baselen; - cp = path + prevlen; - cp = memchr(cp, '/', path + len - cp); - if (!cp) - baselen = len; - else - baselen = cp - path; - strbuf_reset(&sb); - strbuf_add(&sb, path, baselen); - if (!is_directory(sb.buf)) - break; - strbuf_reset(&sb); - strbuf_add(&sb, path, prevlen); - strbuf_reset(&subdir); - strbuf_add(&subdir, path+prevlen, baselen-prevlen); - cdir.d_name = subdir.buf; - state = treat_path(dir, NULL, &cdir, istate, &sb, prevlen, pathspec); - - if (state != path_recurse) - break; /* do not recurse into it */ - if (len <= baselen) - break; /* finished checking */ - } - add_path_to_appropriate_result_list(dir, NULL, &cdir, istate, - &sb, baselen, pathspec, - state); - - strbuf_release(&subdir); - strbuf_release(&sb); - return state == path_recurse; -} - -static const char *get_ident_string(void) -{ - static struct strbuf sb = STRBUF_INIT; - struct utsname uts; - - if (sb.len) - return sb.buf; - if (uname(&uts) < 0) - die_errno(_("failed to get kernel name and information")); - strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(), - uts.sysname); - return sb.buf; -} - -static int ident_in_untracked(const struct untracked_cache *uc) -{ - /* - * Previous git versions may have saved many NUL separated - * strings in the "ident" field, but it is insane to manage - * many locations, so just take care of the first one. - */ - - return !strcmp(uc->ident.buf, get_ident_string()); -} - -static void set_untracked_ident(struct untracked_cache *uc) -{ - strbuf_reset(&uc->ident); - strbuf_addstr(&uc->ident, get_ident_string()); - - /* - * This strbuf used to contain a list of NUL separated - * strings, so save NUL too for backward compatibility. - */ - strbuf_addch(&uc->ident, 0); -} - -static void new_untracked_cache(struct index_state *istate) -{ - struct untracked_cache *uc = xcalloc(1, sizeof(*uc)); - strbuf_init(&uc->ident, 100); - uc->exclude_per_dir = ".gitignore"; - /* should be the same flags used by git-status */ - uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES; - set_untracked_ident(uc); - istate->untracked = uc; - istate->cache_changed |= UNTRACKED_CHANGED; -} - -void add_untracked_cache(struct index_state *istate) -{ - if (!istate->untracked) { - new_untracked_cache(istate); - } else { - if (!ident_in_untracked(istate->untracked)) { - free_untracked_cache(istate->untracked); - new_untracked_cache(istate); - } - } -} - -void remove_untracked_cache(struct index_state *istate) -{ - if (istate->untracked) { - free_untracked_cache(istate->untracked); - istate->untracked = NULL; - istate->cache_changed |= UNTRACKED_CHANGED; - } -} - -static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir, - int base_len, - const struct pathspec *pathspec) -{ - struct untracked_cache_dir *root; - static int untracked_cache_disabled = -1; - - if (!dir->untracked) - return NULL; - if (untracked_cache_disabled < 0) - untracked_cache_disabled = git_env_bool("GIT_DISABLE_UNTRACKED_CACHE", 0); - if (untracked_cache_disabled) - return NULL; - - /* - * We only support $GIT_DIR/info/exclude and core.excludesfile - * as the global ignore rule files. Any other additions - * (e.g. from command line) invalidate the cache. This - * condition also catches running setup_standard_excludes() - * before setting dir->untracked! - */ - if (dir->unmanaged_exclude_files) - return NULL; - - /* - * Optimize for the main use case only: whole-tree git - * status. More work involved in treat_leading_path() if we - * use cache on just a subset of the worktree. pathspec - * support could make the matter even worse. - */ - if (base_len || (pathspec && pathspec->nr)) - return NULL; - - /* Different set of flags may produce different results */ - if (dir->flags != dir->untracked->dir_flags || - /* - * See treat_directory(), case index_nonexistent. Without - * this flag, we may need to also cache .git file content - * for the resolve_gitlink_ref() call, which we don't. - */ - !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) || - /* We don't support collecting ignore files */ - (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO | - DIR_COLLECT_IGNORED))) - return NULL; - - /* - * If we use .gitignore in the cache and now you change it to - * .gitexclude, everything will go wrong. - */ - if (dir->exclude_per_dir != dir->untracked->exclude_per_dir && - strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir)) - return NULL; - - /* - * EXC_CMDL is not considered in the cache. If people set it, - * skip the cache. - */ - if (dir->exclude_list_group[EXC_CMDL].nr) - return NULL; - - if (!ident_in_untracked(dir->untracked)) { - warning(_("untracked cache is disabled on this system or location")); - return NULL; - } - - if (!dir->untracked->root) { - const int len = sizeof(*dir->untracked->root); - dir->untracked->root = xmalloc(len); - memset(dir->untracked->root, 0, len); - } - - /* Validate $GIT_DIR/info/exclude and core.excludesfile */ - root = dir->untracked->root; - if (!oideq(&dir->ss_info_exclude.oid, - &dir->untracked->ss_info_exclude.oid)) { - invalidate_gitignore(dir->untracked, root); - dir->untracked->ss_info_exclude = dir->ss_info_exclude; - } - if (!oideq(&dir->ss_excludes_file.oid, - &dir->untracked->ss_excludes_file.oid)) { - invalidate_gitignore(dir->untracked, root); - dir->untracked->ss_excludes_file = dir->ss_excludes_file; - } - - /* Make sure this directory is not dropped out at saving phase */ - root->recurse = 1; - return root; -} - -int read_directory(struct dir_struct *dir, struct index_state *istate, - const char *path, int len, const struct pathspec *pathspec) -{ - struct untracked_cache_dir *untracked; - - trace_performance_enter(); - - if (has_symlink_leading_path(path, len)) { - trace_performance_leave("read directory %.*s", len, path); - return dir->nr; - } - - untracked = validate_untracked_cache(dir, len, pathspec); - if (!untracked) - /* - * make sure untracked cache code path is disabled, - * e.g. prep_exclude() - */ - dir->untracked = NULL; - if (!len || treat_leading_path(dir, istate, path, len, pathspec)) - read_directory_recursive(dir, istate, path, len, untracked, 0, 0, pathspec); - QSORT(dir->entries, dir->nr, cmp_dir_entry); - QSORT(dir->ignored, dir->ignored_nr, cmp_dir_entry); - - trace_performance_leave("read directory %.*s", len, path); - if (dir->untracked) { - static int force_untracked_cache = -1; - static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS); - - if (force_untracked_cache < 0) - force_untracked_cache = - git_env_bool("GIT_FORCE_UNTRACKED_CACHE", 0); - trace_printf_key(&trace_untracked_stats, - "node creation: %u\n" - "gitignore invalidation: %u\n" - "directory invalidation: %u\n" - "opendir: %u\n", - dir->untracked->dir_created, - dir->untracked->gitignore_invalidated, - dir->untracked->dir_invalidated, - dir->untracked->dir_opened); - if (force_untracked_cache && - dir->untracked == istate->untracked && - (dir->untracked->dir_opened || - dir->untracked->gitignore_invalidated || - dir->untracked->dir_invalidated)) - istate->cache_changed |= UNTRACKED_CHANGED; - if (dir->untracked != istate->untracked) { - FREE_AND_NULL(dir->untracked); - } - } - return dir->nr; -} - -int file_exists(const char *f) -{ - struct stat sb; - return lstat(f, &sb) == 0; -} - -int repo_file_exists(struct repository *repo, const char *path) -{ - if (repo != the_repository) - BUG("do not know how to check file existence in arbitrary repo"); - - return file_exists(path); -} - -static int cmp_icase(char a, char b) -{ - if (a == b) - return 0; - if (ignore_case) - return toupper(a) - toupper(b); - return a - b; -} - -/* - * Given two normalized paths (a trailing slash is ok), if subdir is - * outside dir, return -1. Otherwise return the offset in subdir that - * can be used as relative path to dir. - */ -int dir_inside_of(const char *subdir, const char *dir) -{ - int offset = 0; - - assert(dir && subdir && *dir && *subdir); - - while (*dir && *subdir && !cmp_icase(*dir, *subdir)) { - dir++; - subdir++; - offset++; - } - - /* hel[p]/me vs hel[l]/yeah */ - if (*dir && *subdir) - return -1; - - if (!*subdir) - return !*dir ? offset : -1; /* same dir */ - - /* foo/[b]ar vs foo/[] */ - if (is_dir_sep(dir[-1])) - return is_dir_sep(subdir[-1]) ? offset : -1; - - /* foo[/]bar vs foo[] */ - return is_dir_sep(*subdir) ? offset + 1 : -1; -} - -int is_inside_dir(const char *dir) -{ - char *cwd; - int rc; - - if (!dir) - return 0; - - cwd = xgetcwd(); - rc = (dir_inside_of(cwd, dir) >= 0); - free(cwd); - return rc; -} - -int is_empty_dir(const char *path) -{ - DIR *dir = opendir(path); - struct dirent *e; - int ret = 1; - - if (!dir) - return 0; - - while ((e = readdir(dir)) != NULL) - if (!is_dot_or_dotdot(e->d_name)) { - ret = 0; - break; - } - - closedir(dir); - return ret; -} - -static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up) -{ - DIR *dir; - struct dirent *e; - int ret = 0, original_len = path->len, len, kept_down = 0; - int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY); - int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL); - struct object_id submodule_head; - - if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) && - !resolve_gitlink_ref(path->buf, "HEAD", &submodule_head)) { - /* Do not descend and nuke a nested git work tree. */ - if (kept_up) - *kept_up = 1; - return 0; - } - - flag &= ~REMOVE_DIR_KEEP_TOPLEVEL; - dir = opendir(path->buf); - if (!dir) { - if (errno == ENOENT) - return keep_toplevel ? -1 : 0; - else if (errno == EACCES && !keep_toplevel) - /* - * An empty dir could be removable even if it - * is unreadable: - */ - return rmdir(path->buf); - else - return -1; - } - strbuf_complete(path, '/'); - - len = path->len; - while ((e = readdir(dir)) != NULL) { - struct stat st; - if (is_dot_or_dotdot(e->d_name)) - continue; - - strbuf_setlen(path, len); - strbuf_addstr(path, e->d_name); - if (lstat(path->buf, &st)) { - if (errno == ENOENT) - /* - * file disappeared, which is what we - * wanted anyway - */ - continue; - /* fall through */ - } else if (S_ISDIR(st.st_mode)) { - if (!remove_dir_recurse(path, flag, &kept_down)) - continue; /* happy */ - } else if (!only_empty && - (!unlink(path->buf) || errno == ENOENT)) { - continue; /* happy, too */ - } - - /* path too long, stat fails, or non-directory still exists */ - ret = -1; - break; - } - closedir(dir); - - strbuf_setlen(path, original_len); - if (!ret && !keep_toplevel && !kept_down) - ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1; - else if (kept_up) - /* - * report the uplevel that it is not an error that we - * did not rmdir() our directory. - */ - *kept_up = !ret; - return ret; -} - -int remove_dir_recursively(struct strbuf *path, int flag) -{ - return remove_dir_recurse(path, flag, NULL); -} - -static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude") - -void setup_standard_excludes(struct dir_struct *dir) -{ - dir->exclude_per_dir = ".gitignore"; - - /* core.excludesfile defaulting to $XDG_CONFIG_HOME/git/ignore */ - if (!excludes_file) - excludes_file = xdg_config_home("ignore"); - if (excludes_file && !access_or_warn(excludes_file, R_OK, 0)) - add_patterns_from_file_1(dir, excludes_file, - dir->untracked ? &dir->ss_excludes_file : NULL); - - /* per repository user preference */ - if (startup_info->have_repository) { - const char *path = git_path_info_exclude(); - if (!access_or_warn(path, R_OK, 0)) - add_patterns_from_file_1(dir, path, - dir->untracked ? &dir->ss_info_exclude : NULL); - } -} - -int remove_path(const char *name) -{ - char *slash; - - if (unlink(name) && !is_missing_file_error(errno)) - return -1; - - slash = strrchr(name, '/'); - if (slash) { - char *dirs = xstrdup(name); - slash = dirs + (slash - name); - do { - *slash = '\0'; - } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/'))); - free(dirs); - } - return 0; -} - -/* - * Frees memory within dir which was allocated, and resets fields for further - * use. Does not free dir itself. - */ -void dir_clear(struct dir_struct *dir) -{ - int i, j; - struct exclude_list_group *group; - struct pattern_list *pl; - struct exclude_stack *stk; - - for (i = EXC_CMDL; i <= EXC_FILE; i++) { - group = &dir->exclude_list_group[i]; - for (j = 0; j < group->nr; j++) { - pl = &group->pl[j]; - if (i == EXC_DIRS) - free((char *)pl->src); - clear_pattern_list(pl); - } - free(group->pl); - } - - for (i = 0; i < dir->ignored_nr; i++) - free(dir->ignored[i]); - for (i = 0; i < dir->nr; i++) - free(dir->entries[i]); - free(dir->ignored); - free(dir->entries); - - stk = dir->exclude_stack; - while (stk) { - struct exclude_stack *prev = stk->prev; - free(stk); - stk = prev; - } - strbuf_release(&dir->basebuf); - - dir_init(dir); -} - -struct ondisk_untracked_cache { - struct stat_data info_exclude_stat; - struct stat_data excludes_file_stat; - uint32_t dir_flags; -}; - -#define ouc_offset(x) offsetof(struct ondisk_untracked_cache, x) - -struct write_data { - int index; /* number of written untracked_cache_dir */ - struct ewah_bitmap *check_only; /* from untracked_cache_dir */ - struct ewah_bitmap *valid; /* from untracked_cache_dir */ - struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */ - struct strbuf out; - struct strbuf sb_stat; - struct strbuf sb_sha1; -}; - -static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from) -{ - to->sd_ctime.sec = htonl(from->sd_ctime.sec); - to->sd_ctime.nsec = htonl(from->sd_ctime.nsec); - to->sd_mtime.sec = htonl(from->sd_mtime.sec); - to->sd_mtime.nsec = htonl(from->sd_mtime.nsec); - to->sd_dev = htonl(from->sd_dev); - to->sd_ino = htonl(from->sd_ino); - to->sd_uid = htonl(from->sd_uid); - to->sd_gid = htonl(from->sd_gid); - to->sd_size = htonl(from->sd_size); -} - -static void write_one_dir(struct untracked_cache_dir *untracked, - struct write_data *wd) -{ - struct stat_data stat_data; - struct strbuf *out = &wd->out; - unsigned char intbuf[16]; - unsigned int intlen, value; - int i = wd->index++; - - /* - * untracked_nr should be reset whenever valid is clear, but - * for safety.. - */ - if (!untracked->valid) { - untracked->untracked_nr = 0; - untracked->check_only = 0; - } - - if (untracked->check_only) - ewah_set(wd->check_only, i); - if (untracked->valid) { - ewah_set(wd->valid, i); - stat_data_to_disk(&stat_data, &untracked->stat_data); - strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data)); - } - if (!is_null_oid(&untracked->exclude_oid)) { - ewah_set(wd->sha1_valid, i); - strbuf_add(&wd->sb_sha1, untracked->exclude_oid.hash, - the_hash_algo->rawsz); - } - - intlen = encode_varint(untracked->untracked_nr, intbuf); - strbuf_add(out, intbuf, intlen); - - /* skip non-recurse directories */ - for (i = 0, value = 0; i < untracked->dirs_nr; i++) - if (untracked->dirs[i]->recurse) - value++; - intlen = encode_varint(value, intbuf); - strbuf_add(out, intbuf, intlen); - - strbuf_add(out, untracked->name, strlen(untracked->name) + 1); - - for (i = 0; i < untracked->untracked_nr; i++) - strbuf_add(out, untracked->untracked[i], - strlen(untracked->untracked[i]) + 1); - - for (i = 0; i < untracked->dirs_nr; i++) - if (untracked->dirs[i]->recurse) - write_one_dir(untracked->dirs[i], wd); -} - -void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked) -{ - struct ondisk_untracked_cache *ouc; - struct write_data wd; - unsigned char varbuf[16]; - int varint_len; - const unsigned hashsz = the_hash_algo->rawsz; - - ouc = xcalloc(1, sizeof(*ouc)); - stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat); - stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat); - ouc->dir_flags = htonl(untracked->dir_flags); - - varint_len = encode_varint(untracked->ident.len, varbuf); - strbuf_add(out, varbuf, varint_len); - strbuf_addbuf(out, &untracked->ident); - - strbuf_add(out, ouc, sizeof(*ouc)); - strbuf_add(out, untracked->ss_info_exclude.oid.hash, hashsz); - strbuf_add(out, untracked->ss_excludes_file.oid.hash, hashsz); - strbuf_add(out, untracked->exclude_per_dir, strlen(untracked->exclude_per_dir) + 1); - FREE_AND_NULL(ouc); - - if (!untracked->root) { - varint_len = encode_varint(0, varbuf); - strbuf_add(out, varbuf, varint_len); - return; - } - - wd.index = 0; - wd.check_only = ewah_new(); - wd.valid = ewah_new(); - wd.sha1_valid = ewah_new(); - strbuf_init(&wd.out, 1024); - strbuf_init(&wd.sb_stat, 1024); - strbuf_init(&wd.sb_sha1, 1024); - write_one_dir(untracked->root, &wd); - - varint_len = encode_varint(wd.index, varbuf); - strbuf_add(out, varbuf, varint_len); - strbuf_addbuf(out, &wd.out); - ewah_serialize_strbuf(wd.valid, out); - ewah_serialize_strbuf(wd.check_only, out); - ewah_serialize_strbuf(wd.sha1_valid, out); - strbuf_addbuf(out, &wd.sb_stat); - strbuf_addbuf(out, &wd.sb_sha1); - strbuf_addch(out, '\0'); /* safe guard for string lists */ - - ewah_free(wd.valid); - ewah_free(wd.check_only); - ewah_free(wd.sha1_valid); - strbuf_release(&wd.out); - strbuf_release(&wd.sb_stat); - strbuf_release(&wd.sb_sha1); -} - -static void free_untracked(struct untracked_cache_dir *ucd) -{ - int i; - if (!ucd) - return; - for (i = 0; i < ucd->dirs_nr; i++) - free_untracked(ucd->dirs[i]); - for (i = 0; i < ucd->untracked_nr; i++) - free(ucd->untracked[i]); - free(ucd->untracked); - free(ucd->dirs); - free(ucd); -} - -void free_untracked_cache(struct untracked_cache *uc) -{ - if (uc) - free_untracked(uc->root); - free(uc); -} - -struct read_data { - int index; - struct untracked_cache_dir **ucd; - struct ewah_bitmap *check_only; - struct ewah_bitmap *valid; - struct ewah_bitmap *sha1_valid; - const unsigned char *data; - const unsigned char *end; -}; - -static void stat_data_from_disk(struct stat_data *to, const unsigned char *data) -{ - memcpy(to, data, sizeof(*to)); - to->sd_ctime.sec = ntohl(to->sd_ctime.sec); - to->sd_ctime.nsec = ntohl(to->sd_ctime.nsec); - to->sd_mtime.sec = ntohl(to->sd_mtime.sec); - to->sd_mtime.nsec = ntohl(to->sd_mtime.nsec); - to->sd_dev = ntohl(to->sd_dev); - to->sd_ino = ntohl(to->sd_ino); - to->sd_uid = ntohl(to->sd_uid); - to->sd_gid = ntohl(to->sd_gid); - to->sd_size = ntohl(to->sd_size); -} - -static int read_one_dir(struct untracked_cache_dir **untracked_, - struct read_data *rd) -{ - struct untracked_cache_dir ud, *untracked; - const unsigned char *data = rd->data, *end = rd->end; - const unsigned char *eos; - unsigned int value; - int i; - - memset(&ud, 0, sizeof(ud)); - - value = decode_varint(&data); - if (data > end) - return -1; - ud.recurse = 1; - ud.untracked_alloc = value; - ud.untracked_nr = value; - if (ud.untracked_nr) - ALLOC_ARRAY(ud.untracked, ud.untracked_nr); - - ud.dirs_alloc = ud.dirs_nr = decode_varint(&data); - if (data > end) - return -1; - ALLOC_ARRAY(ud.dirs, ud.dirs_nr); - - eos = memchr(data, '\0', end - data); - if (!eos || eos == end) - return -1; - - *untracked_ = untracked = xmalloc(st_add3(sizeof(*untracked), eos - data, 1)); - memcpy(untracked, &ud, sizeof(ud)); - memcpy(untracked->name, data, eos - data + 1); - data = eos + 1; - - for (i = 0; i < untracked->untracked_nr; i++) { - eos = memchr(data, '\0', end - data); - if (!eos || eos == end) - return -1; - untracked->untracked[i] = xmemdupz(data, eos - data); - data = eos + 1; - } - - rd->ucd[rd->index++] = untracked; - rd->data = data; - - for (i = 0; i < untracked->dirs_nr; i++) { - if (read_one_dir(untracked->dirs + i, rd) < 0) - return -1; - } - return 0; -} - -static void set_check_only(size_t pos, void *cb) -{ - struct read_data *rd = cb; - struct untracked_cache_dir *ud = rd->ucd[pos]; - ud->check_only = 1; -} - -static void read_stat(size_t pos, void *cb) -{ - struct read_data *rd = cb; - struct untracked_cache_dir *ud = rd->ucd[pos]; - if (rd->data + sizeof(struct stat_data) > rd->end) { - rd->data = rd->end + 1; - return; - } - stat_data_from_disk(&ud->stat_data, rd->data); - rd->data += sizeof(struct stat_data); - ud->valid = 1; -} - -static void read_oid(size_t pos, void *cb) -{ - struct read_data *rd = cb; - struct untracked_cache_dir *ud = rd->ucd[pos]; - if (rd->data + the_hash_algo->rawsz > rd->end) { - rd->data = rd->end + 1; - return; - } - hashcpy(ud->exclude_oid.hash, rd->data); - rd->data += the_hash_algo->rawsz; -} - -static void load_oid_stat(struct oid_stat *oid_stat, const unsigned char *data, - const unsigned char *sha1) -{ - stat_data_from_disk(&oid_stat->stat, data); - hashcpy(oid_stat->oid.hash, sha1); - oid_stat->valid = 1; -} - -struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz) -{ - struct untracked_cache *uc; - struct read_data rd; - const unsigned char *next = data, *end = (const unsigned char *)data + sz; - const char *ident; - int ident_len; - ssize_t len; - const char *exclude_per_dir; - const unsigned hashsz = the_hash_algo->rawsz; - const unsigned offset = sizeof(struct ondisk_untracked_cache); - const unsigned exclude_per_dir_offset = offset + 2 * hashsz; - - if (sz <= 1 || end[-1] != '\0') - return NULL; - end--; - - ident_len = decode_varint(&next); - if (next + ident_len > end) - return NULL; - ident = (const char *)next; - next += ident_len; - - if (next + exclude_per_dir_offset + 1 > end) - return NULL; - - uc = xcalloc(1, sizeof(*uc)); - strbuf_init(&uc->ident, ident_len); - strbuf_add(&uc->ident, ident, ident_len); - load_oid_stat(&uc->ss_info_exclude, - next + ouc_offset(info_exclude_stat), - next + offset); - load_oid_stat(&uc->ss_excludes_file, - next + ouc_offset(excludes_file_stat), - next + offset + hashsz); - uc->dir_flags = get_be32(next + ouc_offset(dir_flags)); - exclude_per_dir = (const char *)next + exclude_per_dir_offset; - uc->exclude_per_dir = xstrdup(exclude_per_dir); - /* NUL after exclude_per_dir is covered by sizeof(*ouc) */ - next += exclude_per_dir_offset + strlen(exclude_per_dir) + 1; - if (next >= end) - goto done2; - - len = decode_varint(&next); - if (next > end || len == 0) - goto done2; - - rd.valid = ewah_new(); - rd.check_only = ewah_new(); - rd.sha1_valid = ewah_new(); - rd.data = next; - rd.end = end; - rd.index = 0; - ALLOC_ARRAY(rd.ucd, len); - - if (read_one_dir(&uc->root, &rd) || rd.index != len) - goto done; - - next = rd.data; - len = ewah_read_mmap(rd.valid, next, end - next); - if (len < 0) - goto done; - - next += len; - len = ewah_read_mmap(rd.check_only, next, end - next); - if (len < 0) - goto done; - - next += len; - len = ewah_read_mmap(rd.sha1_valid, next, end - next); - if (len < 0) - goto done; - - ewah_each_bit(rd.check_only, set_check_only, &rd); - rd.data = next + len; - ewah_each_bit(rd.valid, read_stat, &rd); - ewah_each_bit(rd.sha1_valid, read_oid, &rd); - next = rd.data; - -done: - free(rd.ucd); - ewah_free(rd.valid); - ewah_free(rd.check_only); - ewah_free(rd.sha1_valid); -done2: - if (next != end) { - free_untracked_cache(uc); - uc = NULL; - } - return uc; -} - -static void invalidate_one_directory(struct untracked_cache *uc, - struct untracked_cache_dir *ucd) -{ - uc->dir_invalidated++; - ucd->valid = 0; - ucd->untracked_nr = 0; -} - -/* - * Normally when an entry is added or removed from a directory, - * invalidating that directory is enough. No need to touch its - * ancestors. When a directory is shown as "foo/bar/" in git-status - * however, deleting or adding an entry may have cascading effect. - * - * Say the "foo/bar/file" has become untracked, we need to tell the - * untracked_cache_dir of "foo" that "bar/" is not an untracked - * directory any more (because "bar" is managed by foo as an untracked - * "file"). - * - * Similarly, if "foo/bar/file" moves from untracked to tracked and it - * was the last untracked entry in the entire "foo", we should show - * "foo/" instead. Which means we have to invalidate past "bar" up to - * "foo". - * - * This function traverses all directories from root to leaf. If there - * is a chance of one of the above cases happening, we invalidate back - * to root. Otherwise we just invalidate the leaf. There may be a more - * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to - * detect these cases and avoid unnecessary invalidation, for example, - * checking for the untracked entry named "bar/" in "foo", but for now - * stick to something safe and simple. - */ -static int invalidate_one_component(struct untracked_cache *uc, - struct untracked_cache_dir *dir, - const char *path, int len) -{ - const char *rest = strchr(path, '/'); - - if (rest) { - int component_len = rest - path; - struct untracked_cache_dir *d = - lookup_untracked(uc, dir, path, component_len); - int ret = - invalidate_one_component(uc, d, rest + 1, - len - (component_len + 1)); - if (ret) - invalidate_one_directory(uc, dir); - return ret; - } - - invalidate_one_directory(uc, dir); - return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES; -} - -void untracked_cache_invalidate_path(struct index_state *istate, - const char *path, int safe_path) -{ - if (!istate->untracked || !istate->untracked->root) - return; - if (!safe_path && !verify_path(path, 0)) - return; - invalidate_one_component(istate->untracked, istate->untracked->root, - path, strlen(path)); -} - -void untracked_cache_remove_from_index(struct index_state *istate, - const char *path) -{ - untracked_cache_invalidate_path(istate, path, 1); -} - -void untracked_cache_add_to_index(struct index_state *istate, - const char *path) -{ - untracked_cache_invalidate_path(istate, path, 1); -} - -static void connect_wt_gitdir_in_nested(const char *sub_worktree, - const char *sub_gitdir) -{ - int i; - struct repository subrepo; - struct strbuf sub_wt = STRBUF_INIT; - struct strbuf sub_gd = STRBUF_INIT; - - const struct submodule *sub; - - /* If the submodule has no working tree, we can ignore it. */ - if (repo_init(&subrepo, sub_gitdir, sub_worktree)) - return; - - if (repo_read_index(&subrepo) < 0) - die(_("index file corrupt in repo %s"), subrepo.gitdir); - - for (i = 0; i < subrepo.index->cache_nr; i++) { - const struct cache_entry *ce = subrepo.index->cache[i]; - - if (!S_ISGITLINK(ce->ce_mode)) - continue; - - while (i + 1 < subrepo.index->cache_nr && - !strcmp(ce->name, subrepo.index->cache[i + 1]->name)) - /* - * Skip entries with the same name in different stages - * to make sure an entry is returned only once. - */ - i++; - - sub = submodule_from_path(&subrepo, &null_oid, ce->name); - if (!sub || !is_submodule_active(&subrepo, ce->name)) - /* .gitmodules broken or inactive sub */ - continue; - - strbuf_reset(&sub_wt); - strbuf_reset(&sub_gd); - strbuf_addf(&sub_wt, "%s/%s", sub_worktree, sub->path); - strbuf_addf(&sub_gd, "%s/modules/%s", sub_gitdir, sub->name); - - connect_work_tree_and_git_dir(sub_wt.buf, sub_gd.buf, 1); - } - strbuf_release(&sub_wt); - strbuf_release(&sub_gd); - repo_clear(&subrepo); -} - -void connect_work_tree_and_git_dir(const char *work_tree_, - const char *git_dir_, - int recurse_into_nested) -{ - struct strbuf gitfile_sb = STRBUF_INIT; - struct strbuf cfg_sb = STRBUF_INIT; - struct strbuf rel_path = STRBUF_INIT; - char *git_dir, *work_tree; - - /* Prepare .git file */ - strbuf_addf(&gitfile_sb, "%s/.git", work_tree_); - if (safe_create_leading_directories_const(gitfile_sb.buf)) - die(_("could not create directories for %s"), gitfile_sb.buf); - - /* Prepare config file */ - strbuf_addf(&cfg_sb, "%s/config", git_dir_); - if (safe_create_leading_directories_const(cfg_sb.buf)) - die(_("could not create directories for %s"), cfg_sb.buf); - - git_dir = real_pathdup(git_dir_, 1); - work_tree = real_pathdup(work_tree_, 1); - - /* Write .git file */ - write_file(gitfile_sb.buf, "gitdir: %s", - relative_path(git_dir, work_tree, &rel_path)); - /* Update core.worktree setting */ - git_config_set_in_file(cfg_sb.buf, "core.worktree", - relative_path(work_tree, git_dir, &rel_path)); - - strbuf_release(&gitfile_sb); - strbuf_release(&cfg_sb); - strbuf_release(&rel_path); - - if (recurse_into_nested) - connect_wt_gitdir_in_nested(work_tree, git_dir); - - free(work_tree); - free(git_dir); -} - -/* - * Migrate the git directory of the given path from old_git_dir to new_git_dir. - */ -void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir) -{ - if (rename(old_git_dir, new_git_dir) < 0) - die_errno(_("could not migrate git directory from '%s' to '%s'"), - old_git_dir, new_git_dir); - - connect_work_tree_and_git_dir(path, new_git_dir, 0); -} |