Optimize directory listing with pathspec limiter.

The way things are set up, you can now pass a "pathspec" to the
"read_directory()" function. If you pass NULL, it acts exactly
like it used to do (read everything). If you pass a non-NULL
pointer, it will simplify it into a "these are the prefixes
without any special characters", and stop any readdir() early if
the path in question doesn't match any of the prefixes.

NOTE! This does *not* obviate the need for the caller to do the *exact*
pathspec match later. It's a first-level filter on "read_directory()", but
it does not do the full pathspec thing. Maybe it should. But in the
meantime, builtin-add.c really does need to do first

	read_directory(dir, .., pathspec);
	if (pathspec)
		prune_directory(dir, pathspec, baselen);

ie the "prune_directory()" part will do the *exact* pathspec pruning,
while the "read_directory()" will use the pathspec just to do some quick
high-level pruning of the directories it will recurse into.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/builtin-ls-files.c b/builtin-ls-files.c
index 4e1d5af63..74a6acacc 100644
--- a/builtin-ls-files.c
+++ b/builtin-ls-files.c
@@ -216,7 +216,7 @@ static void show_files(struct dir_struct *dir, const char *prefix)
 
 		if (baselen)
 			path = base = prefix;
-		read_directory(dir, path, base, baselen);
+		read_directory(dir, path, base, baselen, pathspec);
 		if (show_others)
 			show_other_files(dir);
 		if (show_killed)