Use mvn -f scala2.13/ in the build scripts to build the 2.13 jars

.github/workflows/mvn-verify-check.yml

@@ -246,12 +246,10 @@ jobs:
               echo "Generated Scala 2.13 build files don't match what's in repository"
               exit 1
           fi
-          # change to Scala 2.13 Directory
-          cd scala2.13
           # test command, will retry for 3 times if failed.
           max_retry=3; delay=30; i=1
           while true; do
-            mvn package \
+            mvn package -f scala2.13/ \
               -pl integration_tests,tests,tools -am -P 'individual,pre-merge' \
               -Dbuildver=${{ matrix.spark-version }} -Dmaven.scalastyle.skip=true \
               -Drat.skip=true ${{ env.COMMON_MVN_FLAGS }} && break || {
@@ -303,12 +301,10 @@ jobs:
               echo "Generated Scala 2.13 build files don't match what's in repository"
               exit 1
           fi
-          # change to Scala 2.13 Directory
-          cd scala2.13
           # test command, will retry for 3 times if failed.
           max_retry=3; delay=30; i=1
           while true; do
-            mvn verify \
+            mvn verify -f scala2.13/ \
               -P "individual,pre-merge,source-javadoc" -Dbuildver=${{ matrix.spark-version }} \
               ${{ env.COMMON_MVN_FLAGS }} && break || {
             if [[ $i -le $max_retry ]]; then

build/buildall

@@ -86,7 +86,7 @@ function bloopInstall() {
 
 function versionsFromDistProfile() {
   [[ "$BUILD_ALL_DEBUG" == "1" ]] && set -x
-  versionRawStr=$(mvn -B help:evaluate -q -pl dist -P"$1" -Dexpression=included_buildvers -DforceStdout)
+  versionRawStr=$($MVN -B help:evaluate -q -pl dist -P"$1" -Dexpression=included_buildvers -DforceStdout)
   versionStr=${versionRawStr//[$'\n',]/}
   echo -n $versionStr
 }
@@ -171,6 +171,7 @@ fi
 export MVN="mvn -Dmaven.wagon.http.retryHandler.count=3 ${MVN_OPT}"
 
 if [[ "$SCALA213" == "1" ]]; then
+  MVN="$MVN -f scala2.13/"
   DIST_PROFILE=${DIST_PROFILE:-"noSnapshotsScala213"}
   $(dirname $0)/make-scala-version-build-files.sh 2.13
 else
@@ -234,10 +235,6 @@ if [[ "$SKIP_CLEAN" != "1" ]]; then
   $MVN -q clean
 fi
 
-if [[ "$SCALA213" == "1" ]]; then
-  cd scala2.13
-fi
-
 echo "Building a combined dist jar with Shims for ${SPARK_SHIM_VERSIONS[@]} ..."
 
 function build_single_shim() {

jenkins/spark-nightly-build.sh

@@ -19,24 +19,23 @@ set -ex
 
 . jenkins/version-def.sh
 
+## MVN_OPT : maven options environment, e.g. MVN_OPT='-Dspark-rapids-jni.version=xxx' to specify spark-rapids-jni dependency's version.
+MVN="mvn -Dmaven.wagon.http.retryHandler.count=3 -DretryFailedDeploymentCount=3 ${MVN_OPT} -Psource-javadoc"
+
 SCALA_BINARY_VER=${SCALA_BINARY_VER:-"2.12"}
 if [ $SCALA_BINARY_VER == "2.13" ]; then
     # Run scala2.13 build and test against JDK17
     export JAVA_HOME=$(echo /usr/lib/jvm/java-1.17.0-*)
     update-java-alternatives --set $JAVA_HOME
     java -version
 
-    cd scala2.13
-    ln -sf ../jenkins jenkins
+    MVN="$MVN -f scala2.13/"
 fi
 
 WORKSPACE=${WORKSPACE:-$(pwd)}
 ## export 'M2DIR' so that shims can get the correct Spark dependency info
 export M2DIR=${M2DIR:-"$WORKSPACE/.m2"}
 
-## MVN_OPT : maven options environment, e.g. MVN_OPT='-Dspark-rapids-jni.version=xxx' to specify spark-rapids-jni dependency's version.
-MVN="mvn -Dmaven.wagon.http.retryHandler.count=3 -DretryFailedDeploymentCount=3 ${MVN_OPT} -Psource-javadoc"
-
 DIST_PL="dist"
 function mvnEval {
     $MVN help:evaluate -q -pl $DIST_PL $MVN_URM_MIRROR -Prelease320 -Dmaven.repo.local=$M2DIR -DforceStdout -Dexpression=$1

jenkins/spark-premerge-build.sh

@@ -191,9 +191,6 @@ ci_scala213() {
     update-java-alternatives --set $JAVA_HOME
     java -version
 
-    cd scala2.13
-    ln -sf ../jenkins jenkins
-
     # Download a Scala 2.13 version of Spark
     prepare_spark 3.3.0 2.13
 
@@ -202,15 +199,15 @@ ci_scala213() {
     do
         echo "Spark version (Scala 2.13): $version"
         env -u SPARK_HOME \
-            $MVN_CMD -U -B $MVN_URM_MIRROR -Dbuildver=$version clean install $MVN_BUILD_ARGS -Dpytest.TEST_TAGS=''
+            $MVN_CMD -f scala2.13/ -U -B $MVN_URM_MIRROR -Dbuildver=$version clean install $MVN_BUILD_ARGS -Dpytest.TEST_TAGS=''
         # Run filecache tests
         env -u SPARK_HOME SPARK_CONF=spark.rapids.filecache.enabled=true \
-            $MVN_CMD -B $MVN_URM_MIRROR -Dbuildver=$version test -rf tests $MVN_BUILD_ARGS -Dpytest.TEST_TAGS='' \
+            $MVN_CMD -f scala2.13/ -B $MVN_URM_MIRROR -Dbuildver=$version test -rf tests $MVN_BUILD_ARGS -Dpytest.TEST_TAGS='' \
             -DwildcardSuites=org.apache.spark.sql.rapids.filecache.FileCacheIntegrationSuite
     done
 
-    $MVN_CMD -U -B $MVN_URM_MIRROR clean package $MVN_BUILD_ARGS -DskipTests=true
-    cd .. # Run integration tests in the project root dir to leverage test cases and resource files
+    $MVN_CMD -f scala2.13/ -U -B $MVN_URM_MIRROR clean package $MVN_BUILD_ARGS -DskipTests=true
+
     export TEST_TAGS="not premerge_ci_1"
     export TEST_TYPE="pre-commit"
     # SPARK_HOME (and related) must be set to a Spark built with Scala 2.13

scala2.13/README.md

@@ -25,8 +25,7 @@ You can use Maven to build the plugin. Like with Scala 2.12, we recommend buildi
 phase.
 
 ```shell script
-cd scala2.13
-mvn verify
+mvn verify -f scala2.13/
 ```
 
 After a successful build, the RAPIDS Accelerator jar will be in the `scala2.13/dist/target/` directory.
@@ -45,7 +44,6 @@ You can also use the `buildall` script in the parent directory to build against
 of Apache Spark.
 
 ```shell script
-cd ..
 ./build/buildall --profile=noSnapshotsScala213
 ```
 
@@ -72,4 +70,4 @@ That way any new dependencies or other changes will be picked up in the Scala 2.
 You should be able to open the `scala2.13` directory directly in IntelliJ as a separate project. You can build and 
 debug as normal, although there are slight differences in how to navigate the source. In particular, when you select 
 a particular build profile, you will only be able to navigate the source used by modules that are included for that
-spark version.
+spark version.