update-index: manually enable or disable untracked cache

[thirdparty/git.git] / Documentation / git-update-index.txt

diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index aff01798cdf6b114009eae8dfc4f2866a8a24d17..6bc296787e99f1e5fee159a99aba89f6035b6265 100644 (file)
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -170,6 +170,14 @@ may not support it yet.
        the shared index file. This mode is designed for very large
        indexes that take a significant amount of time to read or write.
 
+--untracked-cache::
+--no-untracked-cache::
+       Enable or disable untracked cache extension. This could speed
+       up for commands that involve determining untracked files such
+       as `git status`. The underlying operating system and file
+       system must change `st_mtime` field of a directory if files
+       are added or deleted in that directory.
+
 \--::
        Do not interpret any more arguments as options.