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Date:   Sun,  3 Jan 2021 08:50:13 +0100
From:   Nicolai Fischer <nicolai.fischer@....de>
To:     linux-kernel@...r.kernel.org
Cc:     joe@...ches.com, apw@...onical.com, akpm@...ux-foundation.org,
        nicolai.fischer@....de, johannes.czekay@....de,
        linux-kernel@...cs.fau.de
Subject: [PATCH v3 3/5] checkpatch: kconfig: enforce help text indentation

Adds a new warning in case the indentation level of the
first line of a Kconfig help message is not at least two spaces
higher than the keyword itself.
Blank lines between the message and the help keyword
are ignored.

Co-developed-by: Johannes Czekay <johannes.czekay@....de>
Signed-off-by: Johannes Czekay <johannes.czekay@....de>
Signed-off-by: Nicolai Fischer <nicolai.fischer@....de>
---

Now matches indentation of two or more spaces, instead of exactly two.


 scripts/checkpatch.pl | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c86a971a3205..209880810aaa 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3313,6 +3313,8 @@ sub process {
 			my $f;
 			my $is_start = 0;
 			my $is_end = 0;
+			my $help_indent;
+			my $help_stat_real;
 			for (; $cnt > 0 && defined $lines[$ln - 1]; $ln++) {
 				$f = $lines[$ln - 1];
 				$cnt-- if ($lines[$ln - 1] !~ /^-/);
@@ -3323,8 +3325,10 @@ sub process {
 
 				if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate|int|hex|string|prompt)\s*(?:["'].*)?$/) {
 					$is_start = 1;
-				} elsif ($lines[$ln - 1] =~ /^\+\s*help$/) {
-					$length = -1;
+				} elsif ($lines[$ln - 1] =~ /^\+(\s*)help$/) {
+					$help_indent = $1;
+					$length = 0;
+					next;
 				}
 
 				$f =~ s/^.//;
@@ -3332,6 +3336,13 @@ sub process {
 				$f =~ s/^\s+//;
 				next if ($f =~ /^$/);
 
+				if (defined $help_indent) {
+					if ($lines[$ln - 1] !~ /^\+$help_indent\ {2,}\S*/) {
+						$help_stat_real = get_stat_real($ln - 1, $ln);
+					}
+					undef $help_indent;
+				}
+
 				# This only checks context lines in the patch
 				# and so hopefully shouldn't trigger false
 				# positives, even though some of these are
@@ -3347,6 +3358,10 @@ sub process {
 				WARN("CONFIG_DESCRIPTION",
 				     "please write a paragraph that describes the config symbol fully\n" . $herecurr);
 			}
+			if ($is_start && $is_end && defined $help_stat_real) {
+				WARN("CONFIG_DESCRIPTION",
+				     "please indent the help text two spaces more than the keyword\n" . "$here\n$help_stat_real\n");
+			}
 			#print "is_start<$is_start> is_end<$is_end> length<$length>\n";
 		}
 
-- 
2.29.2

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