DESCRIPTION
-----------
Modifies the index or directory cache. Each file mentioned is updated
-into the cache and any 'unmerged' or 'needs updating' state is
+into the index and any 'unmerged' or 'needs updating' state is
cleared.
The way "git-update-index" handles files it is told about can be modified
OPTIONS
-------
--add::
- If a specified file isn't in the cache already then it's
+ If a specified file isn't in the index already then it's
added.
Default behaviour is to ignore new files.
--remove::
- If a specified file is in the cache but is missing then it's
+ If a specified file is in the index but is missing then it's
removed.
Default behaviour is to ignore removed file.
--refresh::
- Looks at the current cache and checks to see if merges or
+ Looks at the current index and checks to see if merges or
updates are needed by checking stat() information.
-q::
- Quiet. If --refresh finds that the cache needs an update, the
+ Quiet. If --refresh finds that the index needs an update, the
default behavior is to error out. This option makes
git-update-index continue anyway.
--unmerged::
- If --refresh finds unmerged changes in the cache, the default
+ If --refresh finds unmerged changes in the index, the default
behavior is to error out. This option makes git-update-index
continue anyway.
Ignores missing files during a --refresh
--cacheinfo <mode> <object> <path>::
- Directly insert the specified info into the cache.
+ Directly insert the specified info into the index.
--index-info::
- Read index info from stdin.
+ Read index information from stdin.
--chmod=(+|-)x::
Set the execute permissions on the updated files.
--info-only::
Do not create objects in the object database for all
<file> arguments that follow this flag; just insert
- their object IDs into the cache.
+ their object IDs into the index.
--force-remove::
Remove the file from the index even when the working directory
Using --refresh
---------------
-'--refresh' does not calculate a new sha1 file or bring the cache
+'--refresh' does not calculate a new sha1 file or bring the index
up-to-date for mode/content changes. But what it *does* do is to
-"re-match" the stat information of a file with the cache, so that you
-can refresh the cache for a file that hasn't been changed but where
+"re-match" the stat information of a file with the index, so that you
+can refresh the index for a file that hasn't been changed but where
the stat entry is out of date.
For example, you'd want to do this after doing a "git-read-tree", to link
-up the stat cache details with the proper files.
+up the stat index details with the proper files.
Using --cacheinfo or --info-only
--------------------------------
To pretend you have a file with mode and sha1 at path, say:
- $ git-update-index --cacheinfo mode sha1 path
+----------------
+$ git-update-index --cacheinfo mode sha1 path
+----------------
'--info-only' is used to register files without placing them in the object
database. This is useful for status-only repositories.
useful when the file is available, but you do not wish to update the
object database.
+
+Using --index-info
+------------------
+
+`--index-info` is a more powerful mechanism that lets you feed
+multiple entry definitions from the standard input, and designed
+specifically for scripts. It can take inputs of three formats:
+
+ . mode SP sha1 TAB path
++
+The first format is what "git-apply --index-info"
+reports, and used to reconstruct a partial tree
+that is used for phony merge base tree when falling
+back on 3-way merge.
+
+ . mode SP type SP sha1 TAB path
++
+The second format is to stuff git-ls-tree output
+into the index file.
+
+ . mode SP sha1 SP stage TAB path
++
+This format is to put higher order stages into the
+index file and matches git-ls-files --stage output.
+
+To place a higher stage entry to the index, the path should
+first be removed by feeding a mode=0 entry for the path, and
+then feeding necessary input lines in the third format.
+
+For example, starting with this index:
+
+------------
+$ git ls-files -s
+100644 8a1218a1024a212bb3db30becd860315f9f3ac52 0 frotz
+------------
+
+you can feed the following input to `--index-info`:
+
+------------
+$ git update-index --index-info
+0 0000000000000000000000000000000000000000 frotz
+100644 8a1218a1024a212bb3db30becd860315f9f3ac52 1 frotz
+100755 8a1218a1024a212bb3db30becd860315f9f3ac52 2 frotz
+------------
+
+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.
+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:
+
+------------
+$ git ls-files -s
+100644 8a1218a1024a212bb3db30becd860315f9f3ac52 1 frotz
+100755 8a1218a1024a212bb3db30becd860315f9f3ac52 2 frotz
+------------
+
+
Examples
--------
To update and refresh only the files already checked out:
- git-checkout-index -n -f -a && git-update-index --ignore-missing --refresh
+----------------
+$ git-checkout-index -n -f -a && git-update-index --ignore-missing --refresh
+----------------
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'. 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
+unreliable, this should be set to 'false' (see gitlink:git-repo-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=`.
+
+See Also
+--------
+gitlink:git-repo-config[1]
+
+
Author
------
Written by Linus Torvalds <torvalds@osdl.org>