linux-kernel - [PATCH 2/3] scripts: coccicheck: warn on unset debug file

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Message-ID: <CAMEXYWdHGz4mdzc2jc7oSdqQPXLtsKktJfi_MZ0GuQRzQhURvQ@mail.gmail.com>
Date: Sun, 28 Dec 2025 11:36:43 -0800
From: Benjamin Philip <benjamin.philip495@...il.com>
To: Julia Lawall <Julia.Lawall@...ia.fr>, Nicolas Palix <nicolas.palix@...g.fr>, 
	Jonathan Corbet <corbet@....net>
Cc: cocci@...ia.fr, workflows@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Benjamin Philip <benjamin.philip495@...il.com>
Subject: [PATCH 2/3] scripts: coccicheck: warn on unset debug file

coccicheck prints debug logs to stdout unless a debug file has been set.
This makes it hard to read coccinelle's suggested changes, especially
for someone new to coccicheck.

>From this commit, we warn about this behaviour from within the script on
an unset debug file. Explicitly setting the debug file to /dev/null
suppresses the warning while keeping the default.

Signed-off-by: Benjamin Philip <benjamin.philip495@...il.com>
---
 scripts/coccicheck | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/coccicheck b/scripts/coccicheck
index 2efb74afef2b..8dd766009de1 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -260,6 +260,11 @@ coccinelle () {
 }

 if [ "$DEBUG_FILE" = "" ]; then
+    echo 'You have not explicitly specified the debug file to use.'
+    echo 'Using default "/dev/null" as debug file.'
+    echo 'Debug logs will be printed to stdout.'
+    echo 'You can specify the debug file with "make coccicheck
DEBUG_FILE=<debug_file>"'
+    echo ''
     DEBUG_FILE="/dev/null"
 fi

-- 
2.52.0