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-rw-r--r--Documentation/git-update-index.txt18
1 files changed, 8 insertions, 10 deletions
diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index 929869b0a0..aff01798cd 100644
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -82,20 +82,18 @@ OPTIONS
Set the execute permissions on the updated files.
--[no-]assume-unchanged::
- When these flags are specified, the object names recorded
- for the paths are not updated. Instead, these options
- set and unset the "assume unchanged" bit for the
- paths. When the "assume unchanged" bit is on, Git stops
- checking the working tree files for possible
- modifications, so you need to manually unset the bit to
- tell Git when you change the working tree file. This is
+ When this flag is specified, the object names recorded
+ for the paths are not updated. Instead, this option
+ sets/unsets the "assume unchanged" bit for the
+ paths. When the "assume unchanged" bit is on, the user
+ promises not to change the file and allows Git to assume
+ that the working tree file matches what is recorded in
+ the index. If you want to change the working tree file,
+ you need to unset the bit to tell Git. This is
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).
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,