transport.c: extract 'fill_alternate_refs_command'
[gitweb.git] / dir.c
diff --git a/dir.c b/dir.c
index 7c4b45e30e0ac87527ff0ef3fd8c90670a1e2064..aceb0d48692b7d727cfd2645ae88b0d45d660c09 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -11,6 +11,7 @@
 #include "cache.h"
 #include "config.h"
 #include "dir.h"
+#include "object-store.h"
 #include "attr.h"
 #include "refs.h"
 #include "wildmatch.h"
@@ -19,6 +20,7 @@
 #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.
@@ -231,12 +233,10 @@ int within_depth(const char *name, int namelen,
  *     1 along with { data, size } of the (possibly augmented) buffer
  *       when successful.
  *
- * Optionally updates the given sha1_stat with the given OID (when valid).
+ * Optionally updates the given oid_stat with the given OID (when valid).
  */
-static int do_read_blob(const struct object_id *oid,
-                       struct sha1_stat *sha1_stat,
-                       size_t *size_out,
-                       char **data_out)
+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;
@@ -245,15 +245,15 @@ static int do_read_blob(const struct object_id *oid,
        *size_out = 0;
        *data_out = NULL;
 
-       data = read_sha1_file(oid->hash, &type, &sz);
+       data = read_object_file(oid, &type, &sz);
        if (!data || type != OBJ_BLOB) {
                free(data);
                return -1;
        }
 
-       if (sha1_stat) {
-               memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
-               hashcpy(sha1_stat->sha1, oid->hash);
+       if (oid_stat) {
+               memset(&oid_stat->stat, 0, sizeof(oid_stat->stat));
+               oidcpy(&oid_stat->oid, oid);
        }
 
        if (sz == 0) {
@@ -276,12 +276,13 @@ static int do_read_blob(const struct object_id *oid,
 #define DO_MATCH_DIRECTORY (1<<1)
 #define DO_MATCH_SUBMODULE (1<<2)
 
-static int match_attrs(const char *name, int namelen,
+static int match_attrs(const struct index_state *istate,
+                      const char *name, int namelen,
                       const struct pathspec_item *item)
 {
        int i;
 
-       git_check_attr(name, item->attr_check);
+       git_check_attr(istate, name, item->attr_check);
        for (i = 0; i < item->attr_match_nr; i++) {
                const char *value;
                int matched;
@@ -318,7 +319,8 @@ static int match_attrs(const char *name, int namelen,
  *
  * It returns 0 when there is no match.
  */
-static int match_pathspec_item(const struct pathspec_item *item, int prefix,
+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 */
@@ -358,7 +360,7 @@ static int match_pathspec_item(const struct pathspec_item *item, int prefix,
            strncmp(item->match, name - prefix, item->prefix))
                return 0;
 
-       if (item->attr_match_nr && !match_attrs(name, namelen, item))
+       if (item->attr_match_nr && !match_attrs(istate, name, namelen, item))
                return 0;
 
        /* If the match was just the prefix, we matched */
@@ -426,7 +428,8 @@ static int match_pathspec_item(const struct pathspec_item *item, int prefix,
  * pathspec did not match any names, which could indicate that the
  * user mistyped the nth pathspec.
  */
-static int do_match_pathspec(const struct pathspec *ps,
+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)
@@ -472,7 +475,7 @@ static int do_match_pathspec(const struct pathspec *ps,
                 */
                if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
                        seen[i] = MATCHED_FNMATCH;
-               how = match_pathspec_item(ps->items+i, prefix, name,
+               how = match_pathspec_item(istate, ps->items+i, prefix, name,
                                          namelen, flags);
                if (ps->recursive &&
                    (ps->magic & PATHSPEC_MAXDEPTH) &&
@@ -496,17 +499,18 @@ static int do_match_pathspec(const struct pathspec *ps,
        return retval;
 }
 
-int match_pathspec(const struct pathspec *ps,
+int match_pathspec(const struct index_state *istate,
+                  const struct pathspec *ps,
                   const char *name, int namelen,
                   int prefix, char *seen, int is_dir)
 {
        int positive, negative;
        unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
-       positive = do_match_pathspec(ps, name, namelen,
+       positive = do_match_pathspec(istate, ps, name, namelen,
                                     prefix, seen, flags);
        if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
                return positive;
-       negative = do_match_pathspec(ps, name, namelen,
+       negative = do_match_pathspec(istate, ps, name, namelen,
                                     prefix, seen,
                                     flags | DO_MATCH_EXCLUDE);
        return negative ? 0 : positive;
@@ -515,11 +519,12 @@ int match_pathspec(const struct pathspec *ps,
 /**
  * Check if a submodule is a superset of the pathspec
  */
-int submodule_path_match(const struct pathspec *ps,
+int submodule_path_match(const struct index_state *istate,
+                        const struct pathspec *ps,
                         const char *submodule_name,
                         char *seen)
 {
-       int matched = do_match_pathspec(ps, submodule_name,
+       int matched = do_match_pathspec(istate, ps, submodule_name,
                                        strlen(submodule_name),
                                        0, seen,
                                        DO_MATCH_DIRECTORY |
@@ -561,7 +566,7 @@ int report_path_error(const char *ps_matched,
                if (found_dup)
                        continue;
 
-               error("pathspec '%s' did not match any file(s) known to git.",
+               error(_("pathspec '%s' did not match any file(s) known to git"),
                      pathspec->items[num].original);
                errors++;
        }
@@ -654,9 +659,8 @@ void add_exclude(const char *string, const char *base,
 
 static int read_skip_worktree_file_from_index(const struct index_state *istate,
                                              const char *path,
-                                             size_t *size_out,
-                                             char **data_out,
-                                             struct sha1_stat *sha1_stat)
+                                             size_t *size_out, char **data_out,
+                                             struct oid_stat *oid_stat)
 {
        int pos, len;
 
@@ -667,7 +671,7 @@ static int read_skip_worktree_file_from_index(const struct index_state *istate,
        if (!ce_skip_worktree(istate->cache[pos]))
                return -1;
 
-       return do_read_blob(&istate->cache[pos]->oid, sha1_stat, size_out, data_out);
+       return do_read_blob(&istate->cache[pos]->oid, oid_stat, size_out, data_out);
 }
 
 /*
@@ -747,8 +751,8 @@ static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
        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));
+       MOVE_ARRAY(dir->dirs + first + 1, dir->dirs + first,
+                  dir->dirs_nr - first);
        dir->dirs_nr++;
        dir->dirs[first] = d;
        return d;
@@ -774,7 +778,16 @@ static void invalidate_directory(struct untracked_cache *uc,
                                 struct untracked_cache_dir *dir)
 {
        int i;
-       uc->dir_invalidated++;
+
+       /*
+        * 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++)
@@ -795,9 +808,8 @@ static int add_excludes_from_buffer(char *buf, size_t size,
  * 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,
-                       struct index_state *istate,
-                       struct sha1_stat *sha1_stat)
+                       struct exclude_list *el, struct index_state *istate,
+                       struct oid_stat *oid_stat)
 {
        struct stat st;
        int r;
@@ -815,16 +827,16 @@ static int add_excludes(const char *fname, const char *base, int baselen,
                        return -1;
                r = read_skip_worktree_file_from_index(istate, fname,
                                                       &size, &buf,
-                                                      sha1_stat);
+                                                      oid_stat);
                if (r != 1)
                        return r;
        } 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;
+                       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;
@@ -837,22 +849,23 @@ static int add_excludes(const char *fname, const char *base, int baselen,
                }
                buf[size++] = '\n';
                close(fd);
-               if (sha1_stat) {
+               if (oid_stat) {
                        int pos;
-                       if (sha1_stat->valid &&
-                           !match_stat_data_racy(istate, &sha1_stat->stat, &st))
+                       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))
-                               hashcpy(sha1_stat->sha1,
-                                       istate->cache[pos]->oid.hash);
+                               oidcpy(&oid_stat->oid,
+                                      &istate->cache[pos]->oid);
                        else
-                               hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
-                       fill_stat_data(&sha1_stat->stat, &st);
-                       sha1_stat->valid = 1;
+                               hash_object_file(buf, size, "blob",
+                                                &oid_stat->oid);
+                       fill_stat_data(&oid_stat->stat, &st);
+                       oid_stat->valid = 1;
                }
        }
 
@@ -930,7 +943,7 @@ struct exclude_list *add_exclude_list(struct dir_struct *dir,
  * Used to set up core.excludesfile and .git/info/exclude lists.
  */
 static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
-                                    struct sha1_stat *sha1_stat)
+                                    struct oid_stat *oid_stat)
 {
        struct exclude_list *el;
        /*
@@ -941,8 +954,8 @@ static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
        if (!dir->untracked)
                dir->unmanaged_exclude_files++;
        el = add_exclude_list(dir, EXC_FILE, fname);
-       if (add_excludes(fname, "", 0, el, NULL, sha1_stat) < 0)
-               die("cannot use %s as an exclude file", fname);
+       if (add_excludes(fname, "", 0, el, NULL, oid_stat) < 0)
+               die(_("cannot use %s as an exclude file"), fname);
 }
 
 void add_excludes_from_file(struct dir_struct *dir, const char *fname)
@@ -1180,7 +1193,7 @@ static void prep_exclude(struct dir_struct *dir,
 
        while (current < baselen) {
                const char *cp;
-               struct sha1_stat sha1_stat;
+               struct oid_stat oid_stat;
 
                stk = xcalloc(1, sizeof(*stk));
                if (current < 0) {
@@ -1223,8 +1236,8 @@ static void prep_exclude(struct dir_struct *dir,
                }
 
                /* Try to read per-directory file */
-               hashclr(sha1_stat.sha1);
-               sha1_stat.valid = 0;
+               oidclr(&oid_stat.oid);
+               oid_stat.valid = 0;
                if (dir->exclude_per_dir &&
                    /*
                     * If we know that no files have been added in
@@ -1234,11 +1247,11 @@ static void prep_exclude(struct dir_struct *dir,
                    (!untracked || !untracked->valid ||
                     /*
                      * .. and .gitignore does not exist before
-                     * (i.e. null exclude_sha1). Then we can skip
+                     * (i.e. null exclude_oid). Then we can skip
                      * loading .gitignore, which would result in
                      * ENOENT anyway.
                      */
-                    !is_null_sha1(untracked->exclude_sha1))) {
+                    !is_null_oid(&untracked->exclude_oid))) {
                        /*
                         * dir->basebuf gets reused by the traversal, but we
                         * need fname to remain unchanged to ensure the src
@@ -1252,7 +1265,7 @@ static void prep_exclude(struct dir_struct *dir,
                        strbuf_addstr(&sb, dir->exclude_per_dir);
                        el->src = strbuf_detach(&sb, NULL);
                        add_excludes(el->src, el->src, stk->baselen, el, istate,
-                                    untracked ? &sha1_stat : NULL);
+                                    untracked ? &oid_stat : NULL);
                }
                /*
                 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
@@ -1269,9 +1282,9 @@ static void prep_exclude(struct dir_struct *dir,
                 * order, though, if you do that.
                 */
                if (untracked &&
-                   hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
+                   oidcmp(&oid_stat.oid, &untracked->exclude_oid)) {
                        invalidate_gitignore(dir->untracked, untracked);
-                       hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
+                       oidcpy(&untracked->exclude_oid, &oid_stat.oid);
                }
                dir->exclude_stack = stk;
                current = stk->baselen;
@@ -1773,7 +1786,7 @@ static enum path_treatment treat_path(struct dir_struct *dir,
        if (!de)
                return treat_path_fast(dir, untracked, cdir, istate, path,
                                       baselen, pathspec);
-       if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
+       if (is_dot_or_dotdot(de->d_name) || !fspathcmp(de->d_name, ".git"))
                return path_none;
        strbuf_setlen(path, baselen);
        strbuf_addstr(path, de->d_name);
@@ -1809,24 +1822,19 @@ static int valid_cached_dir(struct dir_struct *dir,
         */
        refresh_fsmonitor(istate);
        if (!(dir->untracked->use_fsmonitor && untracked->valid)) {
-               if (stat(path->len ? path->buf : ".", &st)) {
-                       invalidate_directory(dir->untracked, untracked);
+               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)) {
-                       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);
+       if (untracked->check_only != !!check_only)
                return 0;
-       }
 
        /*
         * prep_exclude will be called eventually on this directory,
@@ -1853,13 +1861,20 @@ static int open_cached_dir(struct cached_dir *cdir,
                           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;
-       cdir->fdir = opendir(path->len ? path->buf : ".");
-       if (dir->untracked)
+       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;
@@ -2164,8 +2179,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
                                                      const struct pathspec *pathspec)
 {
        struct untracked_cache_dir *root;
+       static int untracked_cache_disabled = -1;
 
-       if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
+       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;
 
        /*
@@ -2216,7 +2236,7 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
                return NULL;
 
        if (!ident_in_untracked(dir->untracked)) {
-               warning(_("Untracked cache is disabled on this system or location."));
+               warning(_("untracked cache is disabled on this system or location"));
                return NULL;
        }
 
@@ -2228,13 +2248,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
 
        /* 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)) {
+       if (oidcmp(&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 (hashcmp(dir->ss_excludes_file.sha1,
-                   dir->untracked->ss_excludes_file.sha1)) {
+       if (oidcmp(&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;
        }
@@ -2248,6 +2268,7 @@ 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;
+       uint64_t start = getnanotime();
 
        if (has_symlink_leading_path(path, len))
                return dir->nr;
@@ -2286,8 +2307,14 @@ int read_directory(struct dir_struct *dir, struct index_state *istate,
                dir->nr = i;
        }
 
+       trace_performance_since(start, "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"
@@ -2297,7 +2324,8 @@ int read_directory(struct dir_struct *dir, struct index_state *istate,
                                 dir->untracked->gitignore_invalidated,
                                 dir->untracked->dir_invalidated,
                                 dir->untracked->dir_opened);
-               if (dir->untracked == istate->untracked &&
+               if (force_untracked_cache &&
+                       dir->untracked == istate->untracked &&
                    (dir->untracked->dir_opened ||
                     dir->untracked->gitignore_invalidated ||
                     dir->untracked->dir_invalidated))
@@ -2475,7 +2503,7 @@ void setup_standard_excludes(struct dir_struct *dir)
 {
        dir->exclude_per_dir = ".gitignore";
 
-       /* core.excludefile defaulting to $XDG_HOME/git/ignore */
+       /* 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))
@@ -2601,9 +2629,10 @@ static void write_one_dir(struct untracked_cache_dir *untracked,
                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)) {
+       if (!is_null_oid(&untracked->exclude_oid)) {
                ewah_set(wd->sha1_valid, i);
-               strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
+               strbuf_add(&wd->sb_sha1, untracked->exclude_oid.hash,
+                          the_hash_algo->rawsz);
        }
 
        intlen = encode_varint(untracked->untracked_nr, intbuf);
@@ -2638,8 +2667,8 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
        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);
+       hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.oid.hash);
+       hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.oid.hash);
        ouc->dir_flags = htonl(untracked->dir_flags);
 
        varint_len = encode_varint(untracked->ident.len, varbuf);
@@ -2804,25 +2833,24 @@ static void read_stat(size_t pos, void *cb)
        ud->valid = 1;
 }
 
-static void read_sha1(size_t pos, void *cb)
+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 + 20 > rd->end) {
+       if (rd->data + the_hash_algo->rawsz > rd->end) {
                rd->data = rd->end + 1;
                return;
        }
-       hashcpy(ud->exclude_sha1, rd->data);
-       rd->data += 20;
+       hashcpy(ud->exclude_oid.hash, rd->data);
+       rd->data += the_hash_algo->rawsz;
 }
 
-static void load_sha1_stat(struct sha1_stat *sha1_stat,
-                          const unsigned char *data,
-                          const unsigned char *sha1)
+static void load_oid_stat(struct oid_stat *oid_stat, const unsigned char *data,
+                         const unsigned char *sha1)
 {
-       stat_data_from_disk(&sha1_stat->stat, data);
-       hashcpy(sha1_stat->sha1, sha1);
-       sha1_stat->valid = 1;
+       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)
@@ -2831,7 +2859,8 @@ struct untracked_cache *read_untracked_extension(const void *data, unsigned long
        struct read_data rd;
        const unsigned char *next = data, *end = (const unsigned char *)data + sz;
        const char *ident;
-       int ident_len, len;
+       int ident_len;
+       ssize_t len;
        const char *exclude_per_dir;
 
        if (sz <= 1 || end[-1] != '\0')
@@ -2850,12 +2879,12 @@ struct untracked_cache *read_untracked_extension(const void *data, unsigned long
        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,
-                      next + ouc_offset(info_exclude_stat),
-                      next + ouc_offset(info_exclude_sha1));
-       load_sha1_stat(&uc->ss_excludes_file,
-                      next + ouc_offset(excludes_file_stat),
-                      next + ouc_offset(excludes_file_sha1));
+       load_oid_stat(&uc->ss_info_exclude,
+                     next + ouc_offset(info_exclude_stat),
+                     next + ouc_offset(info_exclude_sha1));
+       load_oid_stat(&uc->ss_excludes_file,
+                     next + ouc_offset(excludes_file_stat),
+                     next + ouc_offset(excludes_file_sha1));
        uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
        exclude_per_dir = (const char *)next + ouc_offset(exclude_per_dir);
        uc->exclude_per_dir = xstrdup(exclude_per_dir);
@@ -2897,7 +2926,7 @@ struct untracked_cache *read_untracked_extension(const void *data, unsigned long
        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);
+       ewah_each_bit(rd.sha1_valid, read_oid, &rd);
        next = rd.data;
 
 done:
@@ -2968,10 +2997,12 @@ static int invalidate_one_component(struct untracked_cache *uc,
 }
 
 void untracked_cache_invalidate_path(struct index_state *istate,
-                                    const char *path)
+                                    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));
 }
@@ -2979,17 +3010,66 @@ void untracked_cache_invalidate_path(struct index_state *istate,
 void untracked_cache_remove_from_index(struct index_state *istate,
                                       const char *path)
 {
-       untracked_cache_invalidate_path(istate, 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);
+       untracked_cache_invalidate_path(istate, path, 1);
 }
 
-/* Update gitfile and core.worktree setting to connect work tree and git dir */
-void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
+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;
@@ -3019,6 +3099,10 @@ void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
        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);
 }
@@ -3032,5 +3116,5 @@ void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_
                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);
+       connect_work_tree_and_git_dir(path, new_git_dir, 0);
 }