Merge pull request #101 from yaooqinn/travis

Travis: separate travis jobs for different spark versions

.travis.yml

@@ -5,6 +5,7 @@ scala:
 cache:
   directories:
     - $HOME/.m2
+    - ./build
 
 before_deploy:
   - ./build/dist --tgz
@@ -25,14 +26,15 @@ deploy:
     on:
       tags: true
 
-install:
-  - ./build/mvn install -q -DskipTests=true -Dmaven.javadoc.skip=true -B -V
-
-script:
-  - ./build/mvn package -Pspark-2.1 -Dmaven.javadoc.skip=true -B -V
-  - ./build/mvn package -Pspark-2.2 -Dmaven.javadoc.skip=true -B -V
-  - ./build/mvn package -Pspark-2.3 -Dmaven.javadoc.skip=true -B -V
-
-language: java
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
+jobs:
+  include:
+    - stage: spark2.3
+      language: scala
+      script: ./build/mvn install -Pspark-2.3 -Dmaven.javadoc.skip=true -B -V
+    - stage: spark2.2
+      language: scala
+      script: ./build/mvn install -Pspark-2.2 -Dmaven.javadoc.skip=true -B -V
+    - stage: spark2.1
+      language: scala
+      script: ./build/mvn install -Pspark-2.1 -Dmaven.javadoc.skip=true -B -V
+      after_success: bash <(curl -s https://codecov.io/bash)