Improve setup script to check JVM from path if JAVA_HOME is unset (#8702)

* setup.sh should check for JAVA_HOME if  version is not 1.8

Signed-off-by: Maciej Obuchowski <[email protected]>

* fix(tool): Fix jvm from path

---------

Signed-off-by: Maciej Obuchowski <[email protected]>
Co-authored-by: Bruce Bujon <[email protected]>

Author: mobuchowski

setup.sh

@@ -18,9 +18,19 @@ function check-jvm() {
     fi
 }
 
-echo "ℹ️ Checking required JVM:"
+function check-jvm-from-path() {
+    local EXPECTED_JAVA_VERSION=$1
+    if java -version 2>&1 | grep version | grep -q -v "version \"$EXPECTED_JAVA_VERSION"; then
+        echo "❌ The java command from path is not $EXPECTED_JAVA_VERSION. Please set JAVA_HOME environment varible to a JDK $EXPECTED_JAVA_VERSION." >&2
+        exit 1
+    fi
+}
+
+echo "ℹ️ Checking required JVMs:"
 if [ -e "$JAVA_HOME" ]; then
     check-jvm "JAVA_HOME" "1.8"
+elif command -v java &> /dev/null; then
+    check-jvm-from-path "1.8"
 fi
 check-jvm "JAVA_8_HOME" "1.8"
 check-jvm "JAVA_11_HOME" "11"