read-tree: --prefix=<path>/ option.

diff --git a/Documentation/git-read-tree.txt b/Documentation/git-read-tree.txt
index 844cfda8d23e216a090ef94c9b85c186f2d31399..1f21d95684a476a7e771ef166536415b5fe81a3c 100644 (file)
--- a/Documentation/git-read-tree.txt
+++ b/Documentation/git-read-tree.txt
@@ -8,7 +8,7 @@ git-read-tree - Reads tree information into the index
 
 SYNOPSIS
 --------
-'git-read-tree' (<tree-ish> | [[-m [--aggressive]| --reset] [-u | -i]] <tree-ish1> [<tree-ish2> [<tree-ish3>]])
+'git-read-tree' (<tree-ish> | [[-m [--aggressive] | --reset | --prefix=<prefix>] [-u | -i]] <tree-ish1> [<tree-ish2> [<tree-ish3>]])
 
 
 DESCRIPTION
@@ -63,6 +63,15 @@ OPTIONS
 * when both sides adds a path identically.  The resolution
   is to add that path.
 
+--prefix=<prefix>/::
+       Keep the current index contents, and read the contents
+       of named tree-ish under directory at `<prefix>`.  The
+       original index file cannot have anything at the path
+       `<prefix>` itself, and have nothing in `<prefix>/`
+       directory.  Note that the `<prefix>/` value must end
+       with a slash.
+
+
 <tree-ish#>::
        The id of the tree object(s) to be read/merged.