build.gradle in embulk-output-hdfs-0.3.0 vs build.gradle in embulk-output-hdfs-0.4.0.pre

@@ -1,8 +1,8 @@
 plugins {
     id "com.jfrog.bintray" version "1.1"
-    id "com.github.jruby-gradle.base" version "0.1.5"
+    id "com.github.jruby-gradle.base" version "1.5.0"
     id "java"
     id "checkstyle"
     id "com.github.kt3k.coveralls" version "2.4.0"
     id "jacoco"
 }
@@ -13,24 +13,23 @@
 }
 configurations {
     provided
 }
 
-version = "0.3.0"
+version = "0.4.0.pre"
 
-sourceCompatibility = 1.7
-targetCompatibility = 1.7
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
 
 dependencies {
-    compile  "org.embulk:embulk-core:0.8.38"
-    provided "org.embulk:embulk-core:0.8.38"
+    compile  "org.embulk:embulk-core:0.9.20"
+    provided "org.embulk:embulk-core:0.9.20"
     // compile "YOUR_JAR_DEPENDENCY_GROUP:YOUR_JAR_DEPENDENCY_MODULE:YOUR_JAR_DEPENDENCY_VERSION"
-    compile 'org.apache.hadoop:hadoop-client:2.6.0'
-    compile 'com.google.guava:guava:15.0'
+    compile 'org.apache.hadoop:hadoop-client:2.9.2'
     testCompile "junit:junit:4.+"
-    testCompile "org.embulk:embulk-core:0.8.38:tests"
-    testCompile "org.embulk:embulk-standards:0.8.38"
+    testCompile "org.embulk:embulk-core:0.9.20:tests"
+    testCompile "org.embulk:embulk-standards:0.9.20"
 }
 
 task classpath(type: Copy, dependsOn: ["jar"]) {
     doFirst { file("classpath").deleteDir() }
     from (configurations.runtime - configurations.provided + files(jar.archivePath))
@@ -60,17 +59,19 @@
     classpath = sourceSets.main.output + sourceSets.test.output
     source = sourceSets.main.allJava + sourceSets.test.allJava
 }
 
 task gem(type: JRubyExec, dependsOn: ["gemspec", "classpath"]) {
-    jrubyArgs "-rrubygems/gem_runner", "-eGem::GemRunner.new.run(ARGV)", "build"
-    script "${project.name}.gemspec"
+    jrubyArgs "-S"
+    script "gem"
+    scriptArgs "build", "${project.name}.gemspec"
     doLast { ant.move(file: "${project.name}-${project.version}.gem", todir: "pkg") }
 }
 
 task gemPush(type: JRubyExec, dependsOn: ["gem"]) {
-    jrubyArgs "-rrubygems/gem_runner", "-eGem::GemRunner.new.run(ARGV)", "push"
-    script "pkg/${project.name}-${project.version}.gem"
+    jrubyArgs "-S"
+    script "gem"
+    scriptArgs "push", "pkg/${project.name}-${project.version}.gem"
 }
 
 task "package"(dependsOn: ["gemspec", "classpath"]) {
     doLast {
         println "> Build succeeded."