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

[Benjamin Philip]

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@xxxxxxxxx>
---
 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