chore: Add test for latest protobuf version

.kokoro/build.sh

@@ -27,6 +27,79 @@ source ${scriptDir}/common.sh
 mvn -version
 echo ${JOB_TYPE}
 
+# Store the current Java version since the version may change when installing sdk-platform-java
+current_java_home=$JAVA_HOME
+
+# testing-infra-docker has Java 11 installed in java8 docker container. Use this as sdk-platform-java
+# needs Java 11+ to run with GraalVM. For GH actions, JAVA11_HOME does not exist and would skip this.
+if [ ! -z "${JAVA11_HOME}" ]; then
+  export JAVA_HOME="${JAVA11_HOME}"
+  export PATH=${JAVA_HOME}/bin:$PATH
+fi
+
+# Get the current proto runtime version used in this repo
+CURRENT_PROTO_VERSION=$(mvn -ntp help:effective-pom |
+sed -n "/<artifactId>protobuf-java<\/artifactId>/,/<\/dependency>/ {
+  /<version>/{
+      s/<version>\(.*\)<\/version>/\1/p
+      q
+  }
+}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
+echo "The current proto version is: ${CURRENT_PROTO_VERSION}"
+
+# Find the latest proto runtime version available
+LATEST_PROTO_VERSION=$(curl -s https://repo1.maven.org/maven2/com/google/protobuf/protobuf-java/maven-metadata.xml | sed -n '/<release>/s/.*<release>\(.*\)<\/release>.*/\1/p')
+echo "The latest proto version is: ${LATEST_PROTO_VERSION}"
+
+# Only reinstall shared-deps again to test for a newer proto version
+if [[ "${CURRENT_PROTO_VERSION}" != "${LATEST_PROTO_VERSION}" ]]; then
+  pushd /tmp
+  git clone https://github.com/googleapis/sdk-platform-java.git
+  pushd sdk-platform-java
+  pushd gapic-generator-java-pom-parent
+  sed -i "/<protobuf.version>.*<\/protobuf.version>/s/\(.*<protobuf.version>\).*\(<\/protobuf.version>\)/\1${LATEST_PROTO_VERSION}\2/" pom.xml
+  # sdk-platform-java
+  popd
+
+  pushd sdk-platform-java-config
+  # Get current Shared-Deps version in sdk-platform-java
+  SHARED_DEPS_VERSION=$(mvn -ntp help:effective-pom |
+  sed -n "/<artifactId>sdk-platform-java-config<\/artifactId>/,/<\/dependency>/ {
+    /<version>/{
+        s/<version>\(.*\)<\/version>/\1/p
+        q
+    }
+  }" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
+  echo "Shared-Deps Version: ${SHARED_DEPS_VERSION}"
+  # sdk-platform-java
+  popd
+
+  mvn clean install -q -ntp \
+      -DskipTests=true \
+      -Dclirr.skip=true \
+      -Denforcer.skip=true \
+      -T 1C
+  # /tmp
+  popd
+
+  # Back to the original directory of the repo
+  popd
+  # Find all the poms with a reference to shared-deps and update to the new local version
+  poms=($(find . -name pom.xml))
+  for pom in "${poms[@]}"; do
+    if grep -q "sdk-platform-java-config" "${pom}"; then
+      echo "Updating the pom: ${pom} to use shared-deps version: ${SHARED_DEPS_VERSION}"
+      sed -i -E "/<groupId>com.google.cloud<\/groupId>.*<artifactId>sdk-platform-java-config<\/artifactId>/ {
+        s/(<version>)[^<]+(<\/version>)/\1${SHARED_DEPS_VERSION}\2/
+      }" "${pom}"
+    fi
+  done
+fi
+
+# Reset back to the original Java version if changed
+export JAVA_HOME="${current_java_home}"
+export PATH=${JAVA_HOME}/bin:$PATH
+
 # attempt to install 3 times with exponential backoff (starting with 10 seconds)
 retry_with_backoff 3 10 \
   mvn install -B -V -ntp \