dongjoon-hyun commented on code in PR #38258:
URL: https://github.com/apache/spark/pull/38258#discussion_r1910535785


##########
dev/lint-scala:
##########
@@ -21,3 +21,12 @@ SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
 SPARK_ROOT_DIR="$(dirname $SCRIPT_DIR)"
 
 "$SCRIPT_DIR/scalastyle" "$1"
+
+# For Spark Connect, we actively enforce scalafmt and check that the produced 
diff is empty.
+./build/mvn -Pscala-2.12 scalafmt:format -Dscalafmt.skip=false 
-Dscalafmt.validateOnly=true -Dscalafmt.changedOnly=false -pl connector/connect
+if [[ $? -ne 0 ]]; then
+  echo "The scalafmt check failed on connector/connect."
+  echo "Before submitting your change, please make sure to format your code 
using the following command:"
+  echo "./build/mvn -Pscala-2.12 scalafmt:format -Dscalafmt.skip=fase 
-Dscalafmt.validateOnly=false -Dscalafmt.changedOnly=false -pl 
connector/connect"
+  exit 1
+fi

Review Comment:
   Hi, @grundprinzip and @HyukjinKwon .
   
   This PR makes `lint-scala` ignore the exit code of `scalastyle`.



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