[PATCH v1 5/7] diff: split --no-patch from -s

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It should silence only the --patch output, not all output.

When --no-patch was introduced in d09cd15d19 (diff: allow --no-patch as
synonym for -s, 2013-07-16), the idea was to have a more accessible
shortcut to silence the output of `git show`.

However, the interaction with other options was not considered, for
example `--raw --no-patch`.

The original intention remains, as `git show --no-patch` still produces
the same: no output.

Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
---
 Documentation/diff-options.txt | 5 ++---
 diff.c                         | 5 ++++-
 t/t4000-diff-format.sh         | 7 ++++---
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 08ab86189a..ba04b8292a 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -21,7 +21,7 @@ endif::git-format-patch[]
 ifndef::git-format-patch[]
 -p::
 -u::
---patch::
+--[no-]patch::
 	Generate patch (see section titled
 ifdef::git-log[]
 <<generate_patch_text_with_p, "Generating patch text with -p">>).
@@ -34,9 +34,8 @@ ifdef::git-diff[]
 endif::git-diff[]
 
 -s::
---no-patch::
 	Suppress diff output. Useful for commands like `git show` that
-	show the patch by default, or to cancel the effect of `--patch`.
+	show output by default.
 endif::git-format-patch[]
 
 ifdef::git-log[]
diff --git a/diff.c b/diff.c
index 4f4b1d7e13..45c860496f 100644
--- a/diff.c
+++ b/diff.c
@@ -5493,9 +5493,12 @@ struct option *add_diff_options(const struct option *opts,
 		OPT_BITOP('p', "patch", &options->output_format,
 			  N_("generate patch"),
 			  DIFF_FORMAT_PATCH, DIFF_FORMAT_DEFAULT | DIFF_FORMAT_NO_OUTPUT),
-		OPT_SET_INT_F('s', "no-patch", &options->output_format,
+		OPT_SET_INT_F('s', NULL, &options->output_format,
 			  N_("suppress diff output"),
 			  DIFF_FORMAT_NO_OUTPUT, PARSE_OPT_NONEG),
+		OPT_BITOP(0, "no-patch", &options->output_format,
+			  N_("negate --patch"),
+			  DIFF_FORMAT_NO_OUTPUT, DIFF_FORMAT_PATCH | DIFF_FORMAT_DEFAULT),
 		OPT_BITOP('u', NULL, &options->output_format,
 			  N_("generate patch"),
 			  DIFF_FORMAT_PATCH, DIFF_FORMAT_DEFAULT | DIFF_FORMAT_NO_OUTPUT),
diff --git a/t/t4000-diff-format.sh b/t/t4000-diff-format.sh
index 7829cc810d..d7b9a2dab8 100755
--- a/t/t4000-diff-format.sh
+++ b/t/t4000-diff-format.sh
@@ -67,9 +67,10 @@ test_expect_success 'git diff-files -s after editing work tree' '
 	test_must_be_empty err
 '
 
-test_expect_success 'git diff-files --no-patch as synonym for -s' '
-	git diff-files --no-patch >actual 2>err &&
-	test_must_be_empty actual &&
+test_expect_success 'git diff-files --no-patch negates --patch' '
+	git diff-files >expected_raw &&
+	git diff-files --raw --patch --no-patch >actual 2>err &&
+	test_cmp expected_raw actual &&
 	test_must_be_empty err
 '
 
-- 
2.40.0+fc1




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