a7154e916c
The replacement was performed automatically by these commands: perl -pi -e 's/link:(git.+)\.html\[\1\]/gitlink:$1\[1\]/g' \ README Documentation/*.txt perl -pi -e 's/link:git\.html\[git\]/gitlink:git\[7\]/g' \ README Documentation/*.txt Signed-off-by: Sergey Vlasov <vsu@altlinux.ru> Signed-off-by: Junio C Hamano <junkio@cox.net>
135 lines
4.7 KiB
Plaintext
135 lines
4.7 KiB
Plaintext
git-diff-index(1)
|
|
=================
|
|
v0.1, May 2005
|
|
|
|
NAME
|
|
----
|
|
git-diff-index - Compares content and mode of blobs between the cache and repository
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
'git-diff-index' [-m] [--cached] [<common diff options>] <tree-ish> [<path>...]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
Compares the content and mode of the blobs found via a tree
|
|
object with the content of the current cache and, optionally
|
|
ignoring the stat state of the file on disk. When paths are
|
|
specified, compares only those named paths. Otherwise all
|
|
entries in the cache are compared.
|
|
|
|
OPTIONS
|
|
-------
|
|
include::diff-options.txt[]
|
|
|
|
<tree-ish>::
|
|
The id of a tree object to diff against.
|
|
|
|
--cached::
|
|
do not consider the on-disk file at all
|
|
|
|
-m::
|
|
By default, files recorded in the index but not checked
|
|
out are reported as deleted. This flag makes
|
|
"git-diff-index" say that all non-checked-out files are up
|
|
to date.
|
|
|
|
Output format
|
|
-------------
|
|
include::diff-format.txt[]
|
|
|
|
Operating Modes
|
|
---------------
|
|
You can choose whether you want to trust the index file entirely
|
|
(using the '--cached' flag) or ask the diff logic to show any files
|
|
that don't match the stat state as being "tentatively changed". Both
|
|
of these operations are very useful indeed.
|
|
|
|
Cached Mode
|
|
-----------
|
|
If '--cached' is specified, it allows you to ask:
|
|
|
|
show me the differences between HEAD and the current cache
|
|
contents (the ones I'd write with a "git-write-tree")
|
|
|
|
For example, let's say that you have worked on your working directory, updated
|
|
some files in the cache and are ready to commit. You want to see eactly
|
|
*what* you are going to commit is without having to write a new tree
|
|
object and compare it that way, and to do that, you just do
|
|
|
|
git-diff-index --cached $(cat .git/HEAD)
|
|
|
|
Example: let's say I had renamed `commit.c` to `git-commit.c`, and I had
|
|
done an "git-update-index" to make that effective in the index file.
|
|
"git-diff-files" wouldn't show anything at all, since the index file
|
|
matches my working directory. But doing a "git-diff-index" does:
|
|
|
|
torvalds@ppc970:~/git> git-diff-index --cached $(cat .git/HEAD)
|
|
-100644 blob 4161aecc6700a2eb579e842af0b7f22b98443f74 commit.c
|
|
+100644 blob 4161aecc6700a2eb579e842af0b7f22b98443f74 git-commit.c
|
|
|
|
You can trivially see that the above is a rename.
|
|
|
|
In fact, "git-diff-index --cached" *should* always be entirely equivalent to
|
|
actually doing a "git-write-tree" and comparing that. Except this one is much
|
|
nicer for the case where you just want to check where you are.
|
|
|
|
So doing a "git-diff-index --cached" is basically very useful when you are
|
|
asking yourself "what have I already marked for being committed, and
|
|
what's the difference to a previous tree".
|
|
|
|
Non-cached Mode
|
|
---------------
|
|
The "non-cached" mode takes a different approach, and is potentially
|
|
the more useful of the two in that what it does can't be emulated with
|
|
a "git-write-tree" + "git-diff-tree". Thus that's the default mode.
|
|
The non-cached version asks the question:
|
|
|
|
show me the differences between HEAD and the currently checked out
|
|
tree - index contents _and_ files that aren't up-to-date
|
|
|
|
which is obviously a very useful question too, since that tells you what
|
|
you *could* commit. Again, the output matches the "git-diff-tree -r"
|
|
output to a tee, but with a twist.
|
|
|
|
The twist is that if some file doesn't match the cache, we don't have
|
|
a backing store thing for it, and we use the magic "all-zero" sha1 to
|
|
show that. So let's say that you have edited `kernel/sched.c`, but
|
|
have not actually done a "git-update-index" on it yet - there is no
|
|
"object" associated with the new state, and you get:
|
|
|
|
torvalds@ppc970:~/v2.6/linux> git-diff-index $(cat .git/HEAD )
|
|
*100644->100664 blob 7476bb......->000000...... kernel/sched.c
|
|
|
|
ie it shows that the tree has changed, and that `kernel/sched.c` has is
|
|
not up-to-date and may contain new stuff. The all-zero sha1 means that to
|
|
get the real diff, you need to look at the object in the working directory
|
|
directly rather than do an object-to-object diff.
|
|
|
|
NOTE! As with other commands of this type, "git-diff-index" does not
|
|
actually look at the contents of the file at all. So maybe
|
|
`kernel/sched.c` hasn't actually changed, and it's just that you
|
|
touched it. In either case, it's a note that you need to
|
|
"git-upate-cache" it to make the cache be in sync.
|
|
|
|
NOTE 2! You can have a mixture of files show up as "has been updated"
|
|
and "is still dirty in the working directory" together. You can always
|
|
tell which file is in which state, since the "has been updated" ones
|
|
show a valid sha1, and the "not in sync with the index" ones will
|
|
always have the special all-zero sha1.
|
|
|
|
|
|
Author
|
|
------
|
|
Written by Linus Torvalds <torvalds@osdl.org>
|
|
|
|
Documentation
|
|
--------------
|
|
Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.
|
|
|
|
GIT
|
|
---
|
|
Part of the gitlink:git[7] suite
|
|
|