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index 26920d4f63cd213ff17ab28d8dd0dbea94482147..162cb741b3052560351d2dd3f53c56ece5e51e95 100644 (file)
-m::
By default, files recorded in the index but not checked
out are reported as deleted. This flag makes
-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
+ 'git diff-index' say that all non-checked-out files are up
to date.
to date.
-Output format
--------------
include::diff-format.txt[]
Operating Modes
include::diff-format.txt[]
Operating Modes
If '--cached' is specified, it allows you to ask:
show me the differences between HEAD and the current index
If '--cached' is specified, it allows you to ask:
show me the differences between HEAD and the current index
- contents (the ones I'd write using 'git-write-tree')
+ contents (the ones I'd write using 'git write-tree')
For example, let's say that you have worked on your working directory, updated
some files in the index and are ready to commit. You want to see exactly
For example, let's say that you have worked on your working directory, updated
some files in the index and are ready to commit. You want to see exactly
Example: let's say I had renamed `commit.c` to `git-commit.c`, and I had
done an `update-index` to make that effective in the index file.
`git diff-files` wouldn't show anything at all, since the index file
Example: let's say I had renamed `commit.c` to `git-commit.c`, and I had
done an `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:
+matches my working directory. But doing a 'git diff-index' does:
torvalds@ppc970:~/git> git diff-index --cached HEAD
-100644 blob 4161aecc6700a2eb579e842af0b7f22b98443f74 commit.c
torvalds@ppc970:~/git> git diff-index --cached HEAD
-100644 blob 4161aecc6700a2eb579e842af0b7f22b98443f74 commit.c
You can see easily that the above is a rename.
In fact, `git diff-index --cached` *should* always be entirely equivalent to
You can see easily 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
+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.
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
+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".
asking yourself "what have I already marked for being committed, and
what's the difference to a previous tree".
---------------
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
---------------
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.
+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
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'
+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 index, 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
output to a tee, but with a twist.
The twist is that if some file doesn't match the index, 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
+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 HEAD
"object" associated with the new state, and you get:
torvalds@ppc970:~/v2.6/linux> git diff-index HEAD
get the real diff, you need to look at the object in the working directory
directly rather than do an object-to-object diff.
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
+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
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-update-index' it to make the index be in sync.
+'git update-index' it to make the index be in sync.
NOTE: 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
NOTE: 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