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git-diff.txt: document return code of --no-index

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Within diff_no_index(), we have the following:

	revs->diffopt.flags.exit_with_status = 1;

	...

	/*
	 * The return code for --no-index imitates diff(1):
	 * 0 = no changes, 1 = changes, else error
	 */
	return diff_result_code(&revs->diffopt, 0);

Which means when `git diff` is run in `--no-index` mode, `--exit-code`
is implied. However, the documentation for this is missing in
git-diff.txt.

Add a note about how `--exit-code` is implied in the `--no-index`
documentation to cover this documentation blindspot.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Denton Liu 2019-10-29 09:54:32 -07:00 committed by Junio C Hamano
parent 5fa0f5238b
commit 0115e5d929
1 changed files with 1 additions and 1 deletions
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2
Documentation/git-diff.txt
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@ -36,7 +36,7 @@ two blob objects, or changes between two files on disk.
running the command in a working tree controlled by Git and
at least one of the paths points outside the working tree,
or when running the command outside a working tree
controlled by Git.
controlled by Git. This form implies `--exit-code`.
'git diff' [<options>] --cached [<commit>] [--] [<path>...]::