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-rw-r--r--Documentation/git-update-index.txt38
1 files changed, 22 insertions, 16 deletions
diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index 9d0b1515c5..e0a87029cd 100644
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -14,8 +14,8 @@ SYNOPSIS
[--refresh] [-q] [--unmerged] [--ignore-missing]
[(--cacheinfo <mode> <object> <file>)...]
[--chmod=(+|-)x]
- [--assume-unchanged | --no-assume-unchanged]
- [--skip-worktree | --no-skip-worktree]
+ [--[no-]assume-unchanged]
+ [--[no-]skip-worktree]
[--ignore-submodules]
[--really-refresh] [--unresolve] [--again | -g]
[--info-only] [--index-info]
@@ -77,15 +77,14 @@ OPTIONS
--chmod=(+|-)x::
Set the execute permissions on the updated files.
---assume-unchanged::
---no-assume-unchanged::
+--[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
+ 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
+ tell Git when you change the working tree file. This is
sometimes helpful when working with a big project on a
filesystem that has very slow lstat(2) system call
(e.g. cifs).
@@ -102,8 +101,7 @@ you will need to handle the situation manually.
Like '--refresh', but checks stat information unconditionally,
without regard to the "assume unchanged" setting.
---skip-worktree::
---no-skip-worktree::
+--[no-]skip-worktree::
When one of these flags is specified, the object name recorded
for the paths are not updated. Instead, these options
set and unset the "skip-worktree" bit for the paths. See
@@ -145,7 +143,15 @@ you will need to handle the situation manually.
--index-version <n>::
Write the resulting index out in the named on-disk format version.
- The current default version is 2.
+ Supported versions are 2, 3 and 4. The current default version is 2
+ or 3, depending on whether extra features are used, such as
+ `git add -N`.
++
+Version 4 performs a simple pathname compression that reduces index
+size by 30%-50% on large repositories, which results in faster load
+time. Version 4 is relatively young (first released in in 1.8.0 in
+October 2012). Other Git implementations such as JGit and libgit2
+may not support it yet.
-z::
Only meaningful with `--stdin` or `--index-info`; paths are
@@ -239,7 +245,7 @@ $ git update-index --index-info
------------
The first line of the input feeds 0 as the mode to remove the
-path; the SHA1 does not matter as long as it is well formatted.
+path; the SHA-1 does not matter as long as it is well formatted.
Then the second and third line feeds stage 1 and stage 2 entries
for that path. After the above, we would end up with this:
@@ -253,18 +259,18 @@ $ git ls-files -s
Using ``assume unchanged'' bit
------------------------------
-Many operations in git depend on your filesystem to have an
+Many operations in Git depend on your filesystem to have an
efficient `lstat(2)` implementation, so that `st_mtime`
information for working tree files can be cheaply checked to see
if the file contents have changed from the version recorded in
the index file. Unfortunately, some filesystems have
inefficient `lstat(2)`. If your filesystem is one of them, you
can set "assume unchanged" bit to paths you have not changed to
-cause git not to do this check. Note that setting this bit on a
-path does not mean git will check the contents of the file to
-see if it has changed -- it makes git to omit any checking and
+cause Git not to do this check. Note that setting this bit on a
+path does not mean Git will check the contents of the file to
+see if it has changed -- it makes Git to omit any checking and
assume it has *not* changed. When you make changes to working
-tree files, you have to explicitly tell git about it by dropping
+tree files, you have to explicitly tell Git about it by dropping
"assume unchanged" bit, either before or after you modify them.
In order to set "assume unchanged" bit, use `--assume-unchanged`
@@ -274,7 +280,7 @@ have the "assume unchanged" bit set, use `git ls-files -v`
The command looks at `core.ignorestat` configuration variable. When
this is true, paths updated with `git update-index paths...` and
-paths updated with other git commands that update both index and
+paths updated with other Git commands that update both index and
working tree (e.g. 'git apply --index', 'git checkout-index -u',
and 'git read-tree -u') are automatically marked as "assume
unchanged". Note that "assume unchanged" bit is *not* set if