linux-kernel - [PATCH] checkpatch: use patch subject when reading from stdin

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Message-Id: <20191008094006.8251-1-geert+renesas@glider.be>
Date:   Tue,  8 Oct 2019 11:40:06 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Andy Whitcroft <apw@...onical.com>, Joe Perches <joe@...ches.com>
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] checkpatch: use patch subject when reading from stdin

When reading a patch file from standard input, checkpatch calls it "Your
patch", and reports its state as:

    Your patch has style problems, please review.

or:

    Your patch has no obvious style problems and is ready for submission.

Hence when checking multiple patches by piping them to checkpatch, e.g.
when checking patchwork bundles using:

    formail -s scripts/checkpatch.pl < bundle-foo.mbox

it is difficult to identify which patches need to be reviewed and
improved.

Fix this by replacing "Your patch" by the patch subject, if present.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
 scripts/checkpatch.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 6fcc66afb0880830..6b9feb4d646a116b 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1047,6 +1047,10 @@ for my $filename (@ARGV) {
 	}
 	while (<$FILE>) {
 		chomp;
+		if ($vname eq 'Your patch') {
+			my ($subject) = $_ =~ /^Subject:\s*(.*)/;
+			$vname = '"' . $subject . '"' if $subject;
+		}
 		push(@rawlines, $_);
 	}
 	close($FILE);
-- 
2.17.1