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Documentation: How to ignore local changes in tracked files

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This patch explains more carefully that `.gitignore` concerns only
untracked files and refers the reader to

	git update-index --assume-unchanged

in the need of ignoring uncommitted changes in already tracked files.
The description of this option is lifted to a more "porcelainish"
level and explains the caveats of this usecase.

Whether feasible or not, I believe adding this functionality to
the porcelain is out of the scope of this patch. (And I personally
think that referring to the plumbing in the case of such a special
usage is fine.)

This is currently probably one of the top FAQs at #git and the
--assume-unchanged switch is not widely known; gitignore(5) is the first
place where people are likely to look for it.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Petr Baudis 2008-07-18 16:11:07 +02:00 committed by Junio C Hamano
parent c47f10246a
commit 6259ac6628
2 changed files with 17 additions and 2 deletions
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10
Documentation/git-update-index.txt
View File

@ -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::

9
Documentation/gitignore.txt
View File

@ -13,9 +13,14 @@ DESCRIPTION
-----------
A `gitignore` file specifies intentionally untracked files that
git should ignore. Each line in a `gitignore` file specifies a
pattern.
git should ignore.
Note that all the `gitignore` files really concern only files
that are not already tracked by git;
in order to ignore uncommitted changes in already tracked files,
please refer to the 'git update-index --assume-unchanged'
documentation.
Each line in a `gitignore` file specifies a pattern.
When deciding whether to ignore a path, git normally checks
`gitignore` patterns from multiple sources, with the following
order of precedence, from highest to lowest (within one level of