Reuse cache for GraalVM and sbt (#1237)

.travis.yml

@@ -16,10 +16,11 @@ cache:
   - $HOME/.sbt
   - $HOME/.m2
   - $HOME/.ivy2
-  - $HOME/.local/share/graalvm-ce-1.0.0-rc8
+  - $GRAALVM_PARENT_DIRECTORY
 
 env:
   global:
+  - GRAALVM_PARENT_DIRECTORY: ${HOME}/.local/share
   - COMMIT_AUTHOR_EMAIL: "sbt-native-packager@muki.rocks"
   - RELEASE_BRANCH: master
   - secure: bK5zEd2s3y+ScGwuGcxlP0tXx83nvurmF/SWuQSmI0A2KRelipGSSY2BTa+URKk9smJusJIZUi72EqEwMHDhxLCfHomjze5BmpJB5Mr3fQI700nxPEA95cbM4Z1G9+K6fYWy2pi5S7Xmz1Sg07bP4sfzyVYlNB20aquLCmB9Llk=
@@ -37,7 +38,7 @@ before_install:
 
 before_script:
 - .travis/download-sbt
-- . .travis/download-graalvm
+- .travis/download-graalvm
 
 # job definitions
 

.travis/download-graalvm

@@ -18,7 +18,6 @@ function setup_os_specific_envs() {
 
 setup_os_specific_envs
 GRAALVM_VERSION=19.0.0
-GRAALVM_PARENT_DIRECTORY=${HOME}/.local/share
 GRAALVM_DISTRIBUTION=graalvm-ce
 GRAAL_DIRECTORY=${GRAALVM_PARENT_DIRECTORY}/${GRAALVM_DISTRIBUTION}-${GRAALVM_VERSION}
 TAR_GZ_FILENAME=${GRAALVM_DISTRIBUTION}-${OS_NAME}-amd64-${GRAALVM_VERSION}.tar.gz
@@ -34,6 +33,8 @@ then
 		tar zxf ${TAR_GZ_FILENAME} &&
 		${GRAAL_DIRECTORY}/${BIN_PATH}/gu install native-image &&
 		rm -f ${TAR_GZ_FILENAME})
+else
+    echo "GraalVM Native Image already exists"
 fi
 ls -lsa ${NATIVE_IMAGE}
 mkdir -p ${NATIVE_IMAGE_TARGET_DIRECTORY}

.travis/download-sbt

@@ -2,4 +2,10 @@
 SBT_VERSION=1.2.6
 SBT_LAUNCH_JAR_URL=http://dl.bintray.com/sbt/maven-releases/org/scala-sbt/sbt-launch/${SBT_VERSION}/sbt-launch.jar
 TARGET_SBT_LAUNCH_JAR=${HOME}/.sbt/launchers/${SBT_VERSION}/sbt-launch.jar
+
+if [ -f ${TARGET_SBT_LAUNCH_JAR} ]; then
+    echo "sbt ${SBT_VERSION} already exists"
+    exit
+fi
+
 curl -L --create-dirs -o ${TARGET_SBT_LAUNCH_JAR} ${SBT_LAUNCH_JAR_URL}