diff --quiet

This adds the command line option 'quiet' to tell 'git diff-*'
that we are not interested in the actual diff contents but only
want to know if there is any change.  This option automatically
turns --exit-code on, and turns off output formatting, as it
does not make much sense to show the first hit we happened to
have found.

The --quiet option is silently turned off (but --exit-code is
still in effect, so is silent output) if postprocessing filters
such as pickaxe and diff-filter are used.  For all practical
purposes I do not think of a reason to want to use these filters
and not viewing the diff output.

The backends have not been taught about the option with this patch.
That is a topic for later rounds.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/diff.h b/diff.h
index 81fa265656..a0d2ce1399 100644
--- a/diff.h
+++ b/diff.h
@@ -57,6 +57,8 @@ struct diff_options {
 		 find_copies_harder:1,
 		 color_diff:1,
 		 color_diff_words:1,
+		 has_changes:1,
+		 quiet:1,
 		 exit_with_status:1;
 	int context;
 	int break_opt;
@@ -72,8 +74,6 @@ struct diff_options {
 	const char *msg_sep;
 	const char *stat_sep;
 	long xdl_opts;
-	/* 0 - no differences; only meaningful if exit_with_status set */
-	int has_changes;
 
 	int stat_width;
 	int stat_name_width;