Updated travis.

Author: boris-spas

.travis.yml

@@ -4,8 +4,25 @@ os:
 
 language: java
 
-jdk: openjdk11
+jdk:
+    - openjdk11
 
-install: true
+env:
+    - GRAALVM_VERSION="1.0.0-rc8"
 
-script: mvn package && mvn exec:exec@graal && mvn exec:exec@nograal
+install:
+    - |
+        if [[ "$TRAVIS_OS_NAME" == "osx" ]];   then DOWNLOAD_OS_NAME="macos"; fi
+        if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then DOWNLOAD_OS_NAME="linux"; fi
+        curl -LJ "https://github.com/oracle/graal/releases/download/vm-$GRAALVM_VERSION/graalvm-ce-$GRAALVM_VERSION-$DOWNLOAD_OS_NAME-amd64.tar.gz" --output graalvm.tar.gz
+        tar -xzf graalvm.tar.gz
+
+script:
+    - mvn clean
+    - mvn package
+    - mvn exec:exec
+    - mvn exec:exec@nograal
+    - export JAVA_HOME="$(pwd)/graalvm-ce-$GRAALVM_VERSION" && if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export JAVA_HOME="$JAVA_HOME/Contents/Home"; fi
+    - mvn clean
+    - mvn package
+    - mvn exec:exec