Merge branch 'kb/status-ignored-optim-2'

Fixes a handful of issues in the code to traverse working tree to
find untracked and/or ignored files, cleans up and optimizes the
codepath in general.

* kb/status-ignored-optim-2:
  dir.c: git-status --ignored: don't scan the work tree twice
  dir.c: git-status --ignored: don't scan the work tree three times
  dir.c: git-status: avoid is_excluded checks for tracked files
  dir.c: replace is_path_excluded with now equivalent is_excluded API
  dir.c: unify is_excluded and is_path_excluded APIs
  dir.c: move prep_exclude
  dir.c: factor out parts of last_exclude_matching for later reuse
  dir.c: git-clean -d -X: don't delete tracked directories
  dir.c: make 'git-status --ignored' work within leading directories
  dir.c: git-status --ignored: don't list empty directories as ignored
  dir.c: git-ls-files --directories: don't hide empty directories
  dir.c: git-status --ignored: don't list empty ignored directories
  dir.c: git-status --ignored: don't list files in ignored directories
  dir.c: git-status --ignored: don't drop ignored directories

3 files changed, 6 insertions, 21 deletions

diff --git a/builtin/add.c b/builtin/add.c
index 54cd2d417..d4b40f2b7 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -545,9 +545,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 	if (pathspec) {
 		int i;
-		struct path_exclude_check check;
 
-		path_exclude_check_init(&check, &dir);
 		if (!seen)
 			seen = find_pathspecs_matching_against_index(pathspec);
 		for (i = 0; pathspec[i]; i++) {
@@ -555,7 +553,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 			    && !file_exists(pathspec[i])) {
 				if (ignore_missing) {
 					int dtype = DT_UNKNOWN;
-					if (is_path_excluded(&check, pathspec[i], -1, &dtype))
+					if (is_excluded(&dir, pathspec[i], &dtype))
 						dir_add_ignored(&dir, pathspec[i], strlen(pathspec[i]));
 				} else
 					die(_("pathspec '%s' did not match any files"),
@@ -563,7 +561,6 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 			}
 		}
 		free(seen);
-		path_exclude_check_clear(&check);
 	}
 
 	plug_bulk_checkin();
diff --git a/builtin/check-ignore.c b/builtin/check-ignore.c
index 0240f99b5..854a88a05 100644
--- a/builtin/check-ignore.c
+++ b/builtin/check-ignore.c
@@ -59,7 +59,6 @@ static int check_ignore(const char *prefix, const char **pathspec)
 	const char *path, *full_path;
 	char *seen;
 	int num_ignored = 0, dtype = DT_UNKNOWN, i;
-	struct path_exclude_check check;
 	struct exclude *exclude;
 
 	/* read_cache() is only necessary so we can watch out for submodules. */
@@ -67,7 +66,6 @@ static int check_ignore(const char *prefix, const char **pathspec)
 		die(_("index file corrupt"));
 
 	memset(&dir, 0, sizeof(dir));
-	dir.flags |= DIR_COLLECT_IGNORED;
 	setup_standard_excludes(&dir);
 
 	if (!pathspec || !*pathspec) {
@@ -76,7 +74,6 @@ static int check_ignore(const char *prefix, const char **pathspec)
 		return 0;
 	}
 
-	path_exclude_check_init(&check, &dir);
 	/*
 	 * look for pathspecs matching entries in the index, since these
 	 * should not be ignored, in order to be consistent with
@@ -90,8 +87,7 @@ static int check_ignore(const char *prefix, const char **pathspec)
 		full_path = check_path_for_gitlink(full_path);
 		die_if_path_beyond_symlink(full_path, prefix);
 		if (!seen[i]) {
-			exclude = last_exclude_matching_path(&check, full_path,
-							     -1, &dtype);
+			exclude = last_exclude_matching(&dir, full_path, &dtype);
 			if (exclude) {
 				if (!quiet)
 					output_exclude(path, exclude);
@@ -101,7 +97,6 @@ static int check_ignore(const char *prefix, const char **pathspec)
 	}
 	free(seen);
 	clear_directory(&dir);
-	path_exclude_check_clear(&check);
 
 	return num_ignored;
 }
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index 175e6e3e7..22020729c 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -201,19 +201,15 @@ static void show_ru_info(void)
 	}
 }
 
-static int ce_excluded(struct path_exclude_check *check, struct cache_entry *ce)
+static int ce_excluded(struct dir_struct *dir, struct cache_entry *ce)
 {
 	int dtype = ce_to_dtype(ce);
-	return is_path_excluded(check, ce->name, ce_namelen(ce), &dtype);
+	return is_excluded(dir, ce->name, &dtype);
 }
 
 static void show_files(struct dir_struct *dir)
 {
 	int i;
-	struct path_exclude_check check;
-
-	if ((dir->flags & DIR_SHOW_IGNORED))
-		path_exclude_check_init(&check, dir);
 
 	/* For cached/deleted files we don't need to even do the readdir */
 	if (show_others || show_killed) {
@@ -227,7 +223,7 @@ static void show_files(struct dir_struct *dir)
 		for (i = 0; i < active_nr; i++) {
 			struct cache_entry *ce = active_cache[i];
 			if ((dir->flags & DIR_SHOW_IGNORED) &&
-			    !ce_excluded(&check, ce))
+			    !ce_excluded(dir, ce))
 				continue;
 			if (show_unmerged && !ce_stage(ce))
 				continue;
@@ -243,7 +239,7 @@ static void show_files(struct dir_struct *dir)
 			struct stat st;
 			int err;
 			if ((dir->flags & DIR_SHOW_IGNORED) &&
-			    !ce_excluded(&check, ce))
+			    !ce_excluded(dir, ce))
 				continue;
 			if (ce->ce_flags & CE_UPDATE)
 				continue;
@@ -256,9 +252,6 @@ static void show_files(struct dir_struct *dir)
 				show_ce_entry(tag_modified, ce);
 		}
 	}
-
-	if ((dir->flags & DIR_SHOW_IGNORED))
-		path_exclude_check_clear(&check);
 }
 
 /*