Merge branch 'maint' of git://repo.or.cz/git-gui into maint

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

diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index a91fd214d2246b6fbf20543a8d285f619ecd7e58..1d9d81a702d26706047ae6ea29b4ca62ebe59460 100644 (file)
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -88,6 +88,16 @@ OPTIONS
        sometimes helpful when working with a big project on a
        filesystem that has very slow lstat(2) system call
        (e.g. cifs).
++
+This option can be also used as a coarse file-level mechanism
+to ignore uncommitted changes in tracked files (akin to what
+`.gitignore` does for untracked files).
+You should remember that an explicit 'git add' operation will
+still cause the file to be refreshed from the working tree.
+Git will fail (gracefully) in case it needs to modify this file
+in the index e.g. when merging in a commit;
+thus, in case the assumed-untracked file is changed upstream,
+you will need to handle the situation manually.
 
 -g::
 --again::
@@ -313,6 +323,11 @@ from symbolic link to regular file.
 The command looks at `core.ignorestat` configuration variable.  See
 'Using "assume unchanged" bit' section above.
 
+The command also looks at `core.trustctime` configuration variable.
+It can be useful when the inode change time is regularly modified by
+something outside Git (file system crawlers and backup systems use
+ctime for marking files processed) (see linkgit:git-config[1]).
+
 
 SEE ALSO
 --------