update-index: upgrade/downgrade on-disk index version

diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index a3081f4e237747dc858fd105302cbb9a489de41b..9d0b1515c58dc825beef6b4507542572c51ca988 100644 (file)
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -19,7 +19,7 @@ SYNOPSIS
             [--ignore-submodules]
             [--really-refresh] [--unresolve] [--again | -g]
             [--info-only] [--index-info]
-            [-z] [--stdin]
+            [-z] [--stdin] [--index-version <n>]
             [--verbose]
             [--] [<file>...]
 
@@ -143,6 +143,10 @@ you will need to handle the situation manually.
 --verbose::
         Report what is being added and removed from index.
 
+--index-version <n>::
+       Write the resulting index out in the named on-disk format version.
+       The current default version is 2.
+
 -z::
        Only meaningful with `--stdin` or `--index-info`; paths are
        separated with NUL character instead of LF.