diff options
Diffstat (limited to 'dir.c')
| -rw-r--r-- | dir.c | 1290 |
1 files changed, 1161 insertions, 129 deletions
@@ -12,6 +12,9 @@ #include "refs.h" #include "wildmatch.h" #include "pathspec.h" +#include "utf8.h" +#include "varint.h" +#include "ewah/ewok.h" struct path_simplify { int len; @@ -31,29 +34,35 @@ enum path_treatment { 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; + + struct dirent *de; + const char *file; + struct untracked_cache_dir *ucd; +}; + static enum path_treatment read_directory_recursive(struct dir_struct *dir, - const char *path, int len, + const char *path, int len, struct untracked_cache_dir *untracked, int check_only, const struct path_simplify *simplify); static int get_dtype(struct dirent *de, const char *path, int len); -/* helper string functions with support for the ignore_case flag */ -int strcmp_icase(const char *a, const char *b) +int fspathcmp(const char *a, const char *b) { return ignore_case ? strcasecmp(a, b) : strcmp(a, b); } -int strncmp_icase(const char *a, const char *b, size_t count) +int fspathncmp(const char *a, const char *b, size_t count) { return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); } -int fnmatch_icase(const char *pattern, const char *string, int flags) -{ - return wildmatch(pattern, string, - flags | (ignore_case ? WM_CASEFOLD : 0), - NULL); -} - int git_fnmatch(const struct pathspec_item *item, const char *pattern, const char *string, int prefix) @@ -377,6 +386,47 @@ int match_pathspec(const struct pathspec *ps, return negative ? 0 : positive; } +int report_path_error(const char *ps_matched, + const struct pathspec *pathspec, + const char *prefix) +{ + /* + * 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. */ @@ -399,7 +449,7 @@ int no_wildcard(const char *string) void parse_exclude_pattern(const char **pattern, int *patternlen, - int *flags, + unsigned *flags, int *nowildcardlen) { const char *p = *pattern; @@ -440,17 +490,12 @@ void add_exclude(const char *string, const char *base, { struct exclude *x; int patternlen; - int flags; + unsigned flags; int nowildcardlen; parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); if (flags & EXC_FLAG_MUSTBEDIR) { - char *s; - x = xmalloc(sizeof(*x) + patternlen + 1); - s = (char *)(x+1); - memcpy(s, string, patternlen); - s[patternlen] = '\0'; - x->pattern = s; + FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen); } else { x = xmalloc(sizeof(*x)); x->pattern = string; @@ -466,7 +511,8 @@ void add_exclude(const char *string, const char *base, x->el = el; } -static void *read_skip_worktree_file_from_index(const char *path, size_t *size) +static void *read_skip_worktree_file_from_index(const char *path, size_t *size, + struct sha1_stat *sha1_stat) { int pos, len; unsigned long sz; @@ -485,6 +531,10 @@ static void *read_skip_worktree_file_from_index(const char *path, size_t *size) return NULL; } *size = xsize_t(sz); + if (sha1_stat) { + memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat)); + hashcpy(sha1_stat->sha1, active_cache[pos]->sha1); + } return data; } @@ -501,9 +551,7 @@ void clear_exclude_list(struct exclude_list *el) free(el->excludes); free(el->filebuf); - el->nr = 0; - el->excludes = NULL; - el->filebuf = NULL; + memset(el, 0, sizeof(*el)); } static void trim_trailing_spaces(char *buf) @@ -529,11 +577,90 @@ static void trim_trailing_spaces(char *buf) *last_space = '\0'; } -int add_excludes_from_file_to_list(const char *fname, - const char *base, - int baselen, - struct exclude_list *el, - int check_index) +/* + * 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 = (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); + memmove(dir->dirs + first + 1, dir->dirs + first, + (dir->dirs_nr - first) * sizeof(*dir->dirs)); + 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; + uc->dir_invalidated++; + dir->valid = 0; + dir->untracked_nr = 0; + for (i = 0; i < dir->dirs_nr; i++) + dir->dirs[i]->recurse = 0; +} + +/* + * Given a file with name "fname", read it (either from disk, or from + * the index if "check_index" is non-zero), parse it and store the + * exclude rules in "el". + * + * If "ss" is not NULL, compute SHA-1 of the exclude file and fill + * stat data from disk (only valid if add_excludes returns zero). If + * ss_valid is non-zero, "ss" must contain good value as input. + */ +static int add_excludes(const char *fname, const char *base, int baselen, + struct exclude_list *el, int check_index, + struct sha1_stat *sha1_stat) { struct stat st; int fd, i, lineno = 1; @@ -547,24 +674,28 @@ int add_excludes_from_file_to_list(const char *fname, if (0 <= fd) close(fd); if (!check_index || - (buf = read_skip_worktree_file_from_index(fname, &size)) == NULL) + (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL) return -1; if (size == 0) { free(buf); return 0; } if (buf[size-1] != '\n') { - buf = xrealloc(buf, size+1); + buf = xrealloc(buf, st_add(size, 1)); buf[size++] = '\n'; } - } - else { + } else { size = xsize_t(st.st_size); if (size == 0) { + if (sha1_stat) { + fill_stat_data(&sha1_stat->stat, &st); + hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); + sha1_stat->valid = 1; + } close(fd); return 0; } - buf = xmalloc(size+1); + buf = xmallocz(size); if (read_in_full(fd, buf, size) != size) { free(buf); close(fd); @@ -572,10 +703,31 @@ int add_excludes_from_file_to_list(const char *fname, } buf[size++] = '\n'; close(fd); + if (sha1_stat) { + int pos; + if (sha1_stat->valid && + !match_stat_data_racy(&the_index, &sha1_stat->stat, &st)) + ; /* no content change, ss->sha1 still good */ + else if (check_index && + (pos = cache_name_pos(fname, strlen(fname))) >= 0 && + !ce_stage(active_cache[pos]) && + ce_uptodate(active_cache[pos]) && + !would_convert_to_git(fname)) + hashcpy(sha1_stat->sha1, active_cache[pos]->sha1); + else + hash_sha1_file(buf, size, "blob", sha1_stat->sha1); + fill_stat_data(&sha1_stat->stat, &st); + sha1_stat->valid = 1; + } } el->filebuf = buf; + + if (skip_utf8_bom(&buf, size)) + size -= buf - el->filebuf; + entry = buf; + for (i = 0; i < size; i++) { if (buf[i] == '\n') { if (entry != buf + i && entry[0] != '#') { @@ -590,6 +742,13 @@ int add_excludes_from_file_to_list(const char *fname, return 0; } +int add_excludes_from_file_to_list(const char *fname, const char *base, + int baselen, struct exclude_list *el, + int check_index) +{ + return add_excludes(fname, base, baselen, el, check_index, NULL); +} + struct exclude_list *add_exclude_list(struct dir_struct *dir, int group_type, const char *src) { @@ -607,26 +766,40 @@ struct exclude_list *add_exclude_list(struct dir_struct *dir, /* * Used to set up core.excludesfile and .git/info/exclude lists. */ -void add_excludes_from_file(struct dir_struct *dir, const char *fname) +static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname, + struct sha1_stat *sha1_stat) { struct exclude_list *el; + /* + * 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++; el = add_exclude_list(dir, EXC_FILE, fname); - if (add_excludes_from_file_to_list(fname, "", 0, el, 0) < 0) + if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0) die("cannot use %s as an exclude file", fname); } +void add_excludes_from_file(struct dir_struct *dir, const char *fname) +{ + dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ + add_excludes_from_file_1(dir, fname, NULL); +} + int match_basename(const char *basename, int basenamelen, const char *pattern, int prefix, int patternlen, - int flags) + unsigned flags) { if (prefix == patternlen) { if (patternlen == basenamelen && - !strncmp_icase(pattern, basename, basenamelen)) + !fspathncmp(pattern, basename, basenamelen)) return 1; } else if (flags & EXC_FLAG_ENDSWITH) { /* "*literal" matching against "fooliteral" */ if (patternlen - 1 <= basenamelen && - !strncmp_icase(pattern + 1, + !fspathncmp(pattern + 1, basename + basenamelen - (patternlen - 1), patternlen - 1)) return 1; @@ -642,7 +815,7 @@ int match_basename(const char *basename, int basenamelen, int match_pathname(const char *pathname, int pathlen, const char *base, int baselen, const char *pattern, int prefix, int patternlen, - int flags) + unsigned flags) { const char *name; int namelen; @@ -663,7 +836,7 @@ int match_pathname(const char *pathname, int pathlen, */ if (pathlen < baselen + 1 || (baselen && pathname[baselen] != '/') || - strncmp_icase(pathname, base, baselen)) + fspathncmp(pathname, base, baselen)) return 0; namelen = baselen ? pathlen - baselen - 1 : pathlen; @@ -677,7 +850,7 @@ int match_pathname(const char *pathname, int pathlen, if (prefix > namelen) return 0; - if (strncmp_icase(pattern, name, prefix)) + if (fspathncmp(pattern, name, prefix)) return 0; pattern += prefix; patternlen -= prefix; @@ -710,6 +883,7 @@ static struct exclude *last_exclude_matching_from_list(const char *pathname, int *dtype, struct exclude_list *el) { + struct exclude *exc = NULL; /* undecided */ int i; if (!el->nr) @@ -731,18 +905,22 @@ static struct exclude *last_exclude_matching_from_list(const char *pathname, if (match_basename(basename, pathlen - (basename - pathname), exclude, prefix, x->patternlen, - x->flags)) - return x; + x->flags)) { + exc = x; + break; + } continue; } assert(x->baselen == 0 || x->base[x->baselen - 1] == '/'); if (match_pathname(pathname, pathlen, x->base, x->baselen ? x->baselen - 1 : 0, - exclude, prefix, x->patternlen, x->flags)) - return x; + exclude, prefix, x->patternlen, x->flags)) { + exc = x; + break; + } } - return NULL; /* undecided */ + return exc; } /* @@ -789,21 +967,24 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen) struct exclude_list_group *group; struct exclude_list *el; 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 + /* + * Pop the exclude lists from the EXCL_DIRS exclude_list_group * which originate from directories not in the prefix of the - * path being checked. */ + * path being checked. + */ while ((stk = dir->exclude_stack) != NULL) { if (stk->baselen <= baselen && - !strncmp(dir->basebuf, base, stk->baselen)) + !strncmp(dir->basebuf.buf, base, stk->baselen)) break; el = &group->el[dir->exclude_stack->exclude_ix]; dir->exclude_stack = stk->prev; dir->exclude = NULL; - free((char *)el->src); /* see strdup() below */ + free((char *)el->src); /* see strbuf_detach() below */ clear_exclude_list(el); free(stk); group->nr--; @@ -813,68 +994,120 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen) if (dir->exclude) 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) { - struct exclude_stack *stk = xcalloc(1, sizeof(*stk)); const char *cp; + struct sha1_stat sha1_stat; + stk = xcalloc(1, sizeof(*stk)); if (current < 0) { cp = base; current = 0; - } - else { + } 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; el = add_exclude_list(dir, EXC_DIRS, NULL); - memcpy(dir->basebuf + current, base + current, - stk->baselen - current); + 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[stk->baselen - 1] = 0; + dir->basebuf.buf[stk->baselen - 1] = 0; dir->exclude = last_exclude_matching_from_lists(dir, - dir->basebuf, stk->baselen - 1, - dir->basebuf + current, &dt); - dir->basebuf[stk->baselen - 1] = '/'; + dir->basebuf.buf, stk->baselen - 1, + dir->basebuf.buf + current, &dt); + dir->basebuf.buf[stk->baselen - 1] = '/'; if (dir->exclude && dir->exclude->flags & EXC_FLAG_NEGATIVE) dir->exclude = NULL; if (dir->exclude) { - dir->basebuf[stk->baselen] = 0; dir->exclude_stack = stk; return; } } - /* Try to read per-directory file unless path is too long */ + /* Try to read per-directory file */ + hashclr(sha1_stat.sha1); + sha1_stat.valid = 0; if (dir->exclude_per_dir && - stk->baselen + strlen(dir->exclude_per_dir) < PATH_MAX) { - strcpy(dir->basebuf + stk->baselen, - 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_sha1). Then we can skip + * loading .gitignore, which would result in + * ENOENT anyway. + */ + !is_null_sha1(untracked->exclude_sha1))) { /* * dir->basebuf gets reused by the traversal, but we * need fname to remain unchanged to ensure the src * member of each struct exclude correctly * back-references its source file. Other invocations * of add_exclude_list provide stable strings, so we - * strdup() and free() here in the caller. + * strbuf_detach() and free() here in the caller. */ - el->src = strdup(dir->basebuf); - add_excludes_from_file_to_list(dir->basebuf, - dir->basebuf, stk->baselen, el, 1); + struct strbuf sb = STRBUF_INIT; + strbuf_addbuf(&sb, &dir->basebuf); + strbuf_addstr(&sb, dir->exclude_per_dir); + el->src = strbuf_detach(&sb, NULL); + add_excludes(el->src, el->src, stk->baselen, el, 1, + untracked ? &sha1_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_exclude_matching(). When the cache is + * used, last_exclude_matching() 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_exclude_matching(). Be careful about ignore rule + * order, though, if you do that. + */ + if (untracked && + hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) { + invalidate_gitignore(dir->untracked, untracked); + hashcpy(untracked->exclude_sha1, sha1_stat.sha1); } dir->exclude_stack = stk; current = stk->baselen; } - dir->basebuf[baselen] = '\0'; + strbuf_setlen(&dir->basebuf, baselen); } /* @@ -918,10 +1151,8 @@ static struct dir_entry *dir_entry_new(const char *pathname, int len) { struct dir_entry *ent; - ent = xmalloc(sizeof(*ent) + len + 1); + FLEX_ALLOC_MEM(ent, name, pathname, len); ent->len = len; - memcpy(ent->name, pathname, len); - ent->name[len] = 0; return ent; } @@ -956,29 +1187,15 @@ enum exist_status { */ static enum exist_status directory_exists_in_index_icase(const char *dirname, int len) { - const struct cache_entry *ce = cache_dir_exists(dirname, len); - unsigned char endchar; - - if (!ce) - return index_nonexistent; - endchar = ce->name[len]; + struct cache_entry *ce; - /* - * The cache_entry structure returned will contain this dirname - * and possibly additional path components. - */ - if (endchar == '/') + if (cache_dir_exists(dirname, len)) return index_directory; - /* - * If there are no additional path components, then this cache_entry - * represents a submodule. Submodules, despite being directories, - * are stored in the cache without a closing slash. - */ - if (!endchar && S_ISGITLINK(ce->ce_mode)) + ce = cache_file_exists(dirname, len, ignore_case); + if (ce && S_ISGITLINK(ce->ce_mode)) return index_gitdir; - /* This should never be hit, but it exists just in case. */ return index_nonexistent; } @@ -1050,7 +1267,8 @@ static enum exist_status directory_exists_in_index(const char *dirname, int len) * (c) otherwise, we recurse into it. */ static enum path_treatment treat_directory(struct dir_struct *dir, - const char *dirname, int len, int exclude, + struct untracked_cache_dir *untracked, + const char *dirname, int len, int baselen, int exclude, const struct path_simplify *simplify) { /* The "len-1" is to strip the final '/' */ @@ -1077,7 +1295,10 @@ static enum path_treatment treat_directory(struct dir_struct *dir, if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES)) return exclude ? path_excluded : path_untracked; - return read_directory_recursive(dir, dirname, len, 1, simplify); + untracked = lookup_untracked(dir->untracked, untracked, + dirname + baselen, len - baselen); + return read_directory_recursive(dir, dirname, len, + untracked, 1, simplify); } /* @@ -1193,7 +1414,9 @@ static int get_dtype(struct dirent *de, const char *path, int len) } static enum path_treatment treat_one_path(struct dir_struct *dir, + struct untracked_cache_dir *untracked, struct strbuf *path, + int baselen, const struct path_simplify *simplify, int dtype, struct dirent *de) { @@ -1245,22 +1468,59 @@ static enum path_treatment treat_one_path(struct dir_struct *dir, return path_none; case DT_DIR: strbuf_addch(path, '/'); - return treat_directory(dir, path->buf, path->len, exclude, - simplify); + return treat_directory(dir, untracked, path->buf, path->len, + baselen, exclude, simplify); case DT_REG: case DT_LNK: return exclude ? path_excluded : path_untracked; } } +static enum path_treatment treat_path_fast(struct dir_struct *dir, + struct untracked_cache_dir *untracked, + struct cached_dir *cdir, + struct strbuf *path, + int baselen, + const struct path_simplify *simplify) +{ + 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, path->buf, path->len, + cdir->ucd, 1, simplify); + /* + * 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 dirent *de, + struct untracked_cache_dir *untracked, + struct cached_dir *cdir, struct strbuf *path, int baselen, const struct path_simplify *simplify) { int dtype; + struct dirent *de = cdir->de; + if (!de) + return treat_path_fast(dir, untracked, cdir, path, + baselen, simplify); if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git")) return path_none; strbuf_setlen(path, baselen); @@ -1269,7 +1529,121 @@ static enum path_treatment treat_path(struct dir_struct *dir, return path_none; dtype = DTYPE(de); - return treat_one_path(dir, path, simplify, dtype, de); + return treat_one_path(dir, untracked, path, baselen, simplify, dtype, de); +} + +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 strbuf *path, + int check_only) +{ + struct stat st; + + if (!untracked) + return 0; + + if (stat(path->len ? path->buf : ".", &st)) { + invalidate_directory(dir->untracked, untracked); + memset(&untracked->stat_data, 0, sizeof(untracked->stat_data)); + return 0; + } + if (!untracked->valid || + match_stat_data_racy(&the_index, &untracked->stat_data, &st)) { + if (untracked->valid) + invalidate_directory(dir->untracked, untracked); + fill_stat_data(&untracked->stat_data, &st); + return 0; + } + + if (untracked->check_only != !!check_only) { + invalidate_directory(dir->untracked, untracked); + return 0; + } + + /* + * prep_exclude will be called eventually on this directory, + * but it's called much later in last_exclude_matching(). 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, path->buf, path->len); + strbuf_setlen(path, path->len - 1); + } else + prep_exclude(dir, 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 strbuf *path, + int check_only) +{ + memset(cdir, 0, sizeof(*cdir)); + cdir->untracked = untracked; + if (valid_cached_dir(dir, untracked, path, check_only)) + return 0; + cdir->fdir = opendir(path->len ? path->buf : "."); + if (dir->untracked) + dir->untracked->dir_opened++; + if (!cdir->fdir) + return -1; + return 0; +} + +static int read_cached_dir(struct cached_dir *cdir) +{ + if (cdir->fdir) { + cdir->de = readdir(cdir->fdir); + if (!cdir->de) + return -1; + 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; + } } /* @@ -1285,38 +1659,48 @@ static enum path_treatment treat_path(struct dir_struct *dir, */ static enum path_treatment read_directory_recursive(struct dir_struct *dir, const char *base, int baselen, - int check_only, + struct untracked_cache_dir *untracked, int check_only, const struct path_simplify *simplify) { - DIR *fdir; + struct cached_dir cdir; enum path_treatment state, subdir_state, dir_state = path_none; - struct dirent *de; struct strbuf path = STRBUF_INIT; strbuf_add(&path, base, baselen); - fdir = opendir(path.len ? path.buf : "."); - if (!fdir) + if (open_cached_dir(&cdir, dir, untracked, &path, check_only)) goto out; - while ((de = readdir(fdir)) != NULL) { + 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, de, &path, baselen, simplify); + state = treat_path(dir, untracked, &cdir, &path, baselen, simplify); + if (state > dir_state) dir_state = state; /* recurse into subdir if instructed by treat_path */ if (state == path_recurse) { - subdir_state = read_directory_recursive(dir, path.buf, - path.len, check_only, simplify); + struct untracked_cache_dir *ud; + ud = lookup_untracked(dir->untracked, untracked, + path.buf + baselen, + path.len - baselen); + subdir_state = + read_directory_recursive(dir, path.buf, path.len, + ud, check_only, simplify); if (subdir_state > dir_state) dir_state = subdir_state; } if (check_only) { /* abort early if maximum state has been reached */ - if (dir_state == path_untracked) + if (dir_state == path_untracked) { + if (cdir.fdir) + add_untracked(untracked, path.buf + baselen); break; + } /* skip the dir_add_* part */ continue; } @@ -1334,15 +1718,18 @@ static enum path_treatment read_directory_recursive(struct dir_struct *dir, break; case path_untracked: - if (!(dir->flags & DIR_SHOW_IGNORED)) - dir_add_name(dir, path.buf, path.len); + if (dir->flags & DIR_SHOW_IGNORED) + break; + dir_add_name(dir, path.buf, path.len); + if (cdir.fdir) + add_untracked(untracked, path.buf + baselen); break; default: break; } } - closedir(fdir); + close_cached_dir(&cdir); out: strbuf_release(&path); @@ -1354,8 +1741,7 @@ static int cmp_name(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 cache_name_compare(e1->name, e1->len, - e2->name, e2->len); + return name_compare(e1->name, e1->len, e2->name, e2->len); } static struct path_simplify *create_simplify(const char **pathspec) @@ -1413,7 +1799,7 @@ static int treat_leading_path(struct dir_struct *dir, break; if (simplify_away(sb.buf, sb.len, simplify)) break; - if (treat_one_path(dir, &sb, simplify, + if (treat_one_path(dir, NULL, &sb, baselen, simplify, DT_DIR, NULL) == path_none) break; /* do not recurse into it */ if (len <= baselen) { @@ -1426,9 +1812,165 @@ static int treat_leading_path(struct dir_struct *dir, return rc; } +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; + + if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE")) + 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 (hashcmp(dir->ss_info_exclude.sha1, + dir->untracked->ss_info_exclude.sha1)) { + invalidate_gitignore(dir->untracked, root); + dir->untracked->ss_info_exclude = dir->ss_info_exclude; + } + if (hashcmp(dir->ss_excludes_file.sha1, + dir->untracked->ss_excludes_file.sha1)) { + 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, const char *path, int len, const struct pathspec *pathspec) { struct path_simplify *simplify; + struct untracked_cache_dir *untracked; /* * Check out create_simplify() @@ -1452,11 +1994,39 @@ int read_directory(struct dir_struct *dir, const char *path, int len, const stru * create_simplify(). */ simplify = create_simplify(pathspec ? pathspec->_raw : NULL); + 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, path, len, simplify)) - read_directory_recursive(dir, path, len, 0, simplify); + read_directory_recursive(dir, path, len, untracked, 0, simplify); free_simplify(simplify); qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name); qsort(dir->ignored, dir->ignored_nr, sizeof(struct dir_entry *), cmp_name); + if (dir->untracked) { + static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS); + 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 (dir->untracked == the_index.untracked && + (dir->untracked->dir_opened || + dir->untracked->gitignore_invalidated || + dir->untracked->dir_invalidated)) + the_index.cache_changed |= UNTRACKED_CHANGED; + if (dir->untracked != the_index.untracked) { + free(dir->untracked); + dir->untracked = NULL; + } + } return dir->nr; } @@ -1466,6 +2036,15 @@ int file_exists(const char *f) return lstat(f, &sb) == 0; } +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 @@ -1477,7 +2056,7 @@ int dir_inside_of(const char *subdir, const char *dir) assert(dir && subdir && *dir && *subdir); - while (*dir && *subdir && *dir == *subdir) { + while (*dir && *subdir && !cmp_icase(*dir, *subdir)) { dir++; subdir++; offset++; @@ -1500,12 +2079,16 @@ int dir_inside_of(const char *subdir, const char *dir) int is_inside_dir(const char *dir) { - char cwd[PATH_MAX]; + char *cwd; + int rc; + if (!dir) return 0; - if (!getcwd(cwd, sizeof(cwd))) - die_errno("can't find the current directory"); - return dir_inside_of(cwd, dir) >= 0; + + cwd = xgetcwd(); + rc = (dir_inside_of(cwd, dir) >= 0); + free(cwd); + return rc; } int is_empty_dir(const char *path) @@ -1558,8 +2141,7 @@ static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up) else return -1; } - if (path->buf[original_len - 1] != '/') - strbuf_addch(path, '/'); + strbuf_complete(path, '/'); len = path->len; while ((e = readdir(dir)) != NULL) { @@ -1608,21 +2190,26 @@ 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) { const char *path; - char *xdg_path; dir->exclude_per_dir = ".gitignore"; - path = git_path("info/exclude"); - if (!excludes_file) { - home_config_paths(NULL, &xdg_path, "ignore"); - excludes_file = xdg_path; - } - if (!access_or_warn(path, R_OK, 0)) - add_excludes_from_file(dir, path); + + /* core.excludefile defaulting to $XDG_HOME/git/ignore */ + if (!excludes_file) + excludes_file = xdg_config_home("ignore"); if (excludes_file && !access_or_warn(excludes_file, R_OK, 0)) - add_excludes_from_file(dir, excludes_file); + add_excludes_from_file_1(dir, excludes_file, + dir->untracked ? &dir->ss_excludes_file : NULL); + + /* per repository user preference */ + path = git_path_info_exclude(); + if (!access_or_warn(path, R_OK, 0)) + add_excludes_from_file_1(dir, path, + dir->untracked ? &dir->ss_info_exclude : NULL); } int remove_path(const char *name) @@ -1672,4 +2259,449 @@ void clear_directory(struct dir_struct *dir) free(stk); stk = prev; } + strbuf_release(&dir->basebuf); +} + +struct ondisk_untracked_cache { + struct stat_data info_exclude_stat; + struct stat_data excludes_file_stat; + uint32_t dir_flags; + unsigned char info_exclude_sha1[20]; + unsigned char excludes_file_sha1[20]; + char exclude_per_dir[FLEX_ARRAY]; +}; + +#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1) + +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_sha1(untracked->exclude_sha1)) { + ewah_set(wd->sha1_valid, i); + strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20); + } + + 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; + size_t len = strlen(untracked->exclude_per_dir); + + FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len); + 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); + hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1); + hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1); + 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, ouc_size(len)); + free(ouc); + ouc = NULL; + + 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 struct stat_data *from) +{ + to->sd_ctime.sec = get_be32(&from->sd_ctime.sec); + to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec); + to->sd_mtime.sec = get_be32(&from->sd_mtime.sec); + to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec); + to->sd_dev = get_be32(&from->sd_dev); + to->sd_ino = get_be32(&from->sd_ino); + to->sd_uid = get_be32(&from->sd_uid); + to->sd_gid = get_be32(&from->sd_gid); + to->sd_size = get_be32(&from->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 *next, *data = rd->data, *end = rd->end; + unsigned int value; + int i, len; + + memset(&ud, 0, sizeof(ud)); + + next = data; + value = decode_varint(&next); + if (next > 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); + data = next; + + next = data; + ud.dirs_alloc = ud.dirs_nr = decode_varint(&next); + if (next > end) + return -1; + ALLOC_ARRAY(ud.dirs, ud.dirs_nr); + data = next; + + len = strlen((const char *)data); + next = data + len + 1; + if (next > rd->end) + return -1; + *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len)); + memcpy(untracked, &ud, sizeof(ud)); + memcpy(untracked->name, data, len + 1); + data = next; + + for (i = 0; i < untracked->untracked_nr; i++) { + len = strlen((const char *)data); + next = data + len + 1; + if (next > rd->end) + return -1; + untracked->untracked[i] = xstrdup((const char*)data); + data = next; + } + + rd->ucd[rd->index++] = untracked; + rd->data = data; + + for (i = 0; i < untracked->dirs_nr; i++) { + len = read_one_dir(untracked->dirs + i, rd); + if (len < 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, (struct stat_data *)rd->data); + rd->data += sizeof(struct stat_data); + ud->valid = 1; +} + +static void read_sha1(size_t pos, void *cb) +{ + struct read_data *rd = cb; + struct untracked_cache_dir *ud = rd->ucd[pos]; + if (rd->data + 20 > rd->end) { + rd->data = rd->end + 1; + return; + } + hashcpy(ud->exclude_sha1, rd->data); + rd->data += 20; +} + +static void load_sha1_stat(struct sha1_stat *sha1_stat, + const struct stat_data *stat, + const unsigned char *sha1) +{ + stat_data_from_disk(&sha1_stat->stat, stat); + hashcpy(sha1_stat->sha1, sha1); + sha1_stat->valid = 1; +} + +struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz) +{ + const struct ondisk_untracked_cache *ouc; + 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, len; + + 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; + + ouc = (const struct ondisk_untracked_cache *)next; + if (next + ouc_size(0) > end) + return NULL; + + uc = xcalloc(1, sizeof(*uc)); + strbuf_init(&uc->ident, ident_len); + strbuf_add(&uc->ident, ident, ident_len); + load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat, + ouc->info_exclude_sha1); + load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat, + ouc->excludes_file_sha1); + uc->dir_flags = get_be32(&ouc->dir_flags); + uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir); + /* NUL after exclude_per_dir is covered by sizeof(*ouc) */ + next += ouc_size(strlen(ouc->exclude_per_dir)); + 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_sha1, &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) +{ + if (!istate->untracked || !istate->untracked->root) + 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); +} + +void untracked_cache_add_to_index(struct index_state *istate, + const char *path) +{ + untracked_cache_invalidate_path(istate, path); } |