_GIT_INDEX_OUTPUT: allow plumbing to output to an alternative index file.

diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index 41bb7e12e3d89e4876a60ea7733cffcaf09cd6ed..cd5e014d4899954b204173f6e1d84e011a307ac8 100644 (file)
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -3,7 +3,7 @@ git-update-index(1)
 
 NAME
 ----
-git-update-index - Modifies the index or directory cache
+git-update-index - Register file contents in the working tree to the index
 
 
 SYNOPSIS
@@ -216,8 +216,8 @@ $ git ls-files -s
 ------------
 
 
-Using "assume unchanged" bit
-----------------------------
+Using ``assume unchanged'' bit
+------------------------------
 
 Many operations in git depend on your filesystem to have an
 efficient `lstat(2)` implementation, so that `st_mtime`
@@ -289,19 +289,24 @@ Configuration
 
 The command honors `core.filemode` configuration variable.  If
 your repository is on an filesystem whose executable bits are
-unreliable, this should be set to 'false' (see gitlink:git-repo-config[1]).
+unreliable, this should be set to 'false' (see gitlink:git-config[1]).
 This causes the command to ignore differences in file modes recorded
 in the index and the file mode on the filesystem if they differ only on
 executable bit.   On such an unfortunate filesystem, you may
 need to use `git-update-index --chmod=`.
 
+Quite similarly, if `core.symlinks` configuration variable is set
+to 'false' (see gitlink:git-config[1]), symbolic links are checked out
+as plain files, and this command does not modify a recorded file mode
+from symbolic link to regular file.
+
 The command looks at `core.ignorestat` configuration variable.  See
 'Using "assume unchanged" bit' section above.
 
 
 See Also
 --------
-gitlink:git-repo-config[1]
+gitlink:git-config[1]
 
 
 Author