Update build to gradle

.gitignore

@@ -14,3 +14,6 @@
 mkmf.log
 vendor/
 /*.gem
+/.gradle/
+/build/
+*.idea

Rakefile

@@ -1,23 +1,19 @@
-require "bundler/gem_tasks"
-require 'jars/version'
 
-begin
-  require 'rspec/core/rake_task'
-  RSpec::Core::RakeTask.new(:spec)
-rescue LoadError
-end
-
-task default: "spec"
+# encoding: utf-8
+require "logstash/devutils/rake"
+require "jars/installer"
+require "fileutils"
 
-require 'jars/installer'
-desc 'Install the JAR dependencies to vendor/'
-task :install_jars do
-  # We actually want jar-dependencies will download the jars and place it in
-  # vendor/jar-dependencies/runtime-jars
-  Jars::Installer.new.vendor_jars!(false, 'vendor/jar-dependencies/runtime-jars')
+task :default do
+  system('rake -vT')
 end
 
-task build: :install_jars
-require "logstash/devutils/rake"
-task vendor: :install_jars
+task :vendor do
+  exit(1) unless system './gradlew vendor'
+end
 
+task :clean do
+  ["vendor/jar-dependencies", "Gemfile.lock"].each do |p|
+    FileUtils.rm_rf(p)
+  end
+end

build.gradle

@@ -0,0 +1,94 @@
+import java.nio.file.Files
+import static java.nio.file.StandardCopyOption.REPLACE_EXISTING
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+apply plugin: "java"
+apply plugin: 'maven'
+apply plugin: "distribution"
+apply plugin: "idea"
+
+group "org.logstash.inputs"
+
+sourceCompatibility = JavaVersion.VERSION_1_8
+
+buildscript {
+    repositories {
+        mavenCentral()
+        jcenter()
+    }
+
+}
+
+repositories {
+    mavenCentral()
+}
+
+task wrapper(type: Wrapper) {
+    gradleVersion = '4.0'
+}
+
+dependencies {
+  compile 'com.amazonaws:aws-java-sdk-kms:1.11.14'
+  compile 'com.amazonaws:amazon-kinesis-client:1.7.0'
+  compile 'com.amazonaws:aws-java-sdk-core:1.11.16'
+  compile 'commons-codec:commons-codec:1.9'
+  compile 'com.fasterxml.jackson.core:jackson-databind:2.6.6'
+  compile 'com.google.guava:guava:18.0'
+  compile 'commons-lang:commons-lang:2.6'
+  compile 'commons-logging:commons-logging:1.2'
+  compile 'joda-time:joda-time:2.8.1'
+  compile 'com.amazonaws:aws-java-sdk-s3:1.11.14'
+  compile 'com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.6.6'
+  compile 'com.fasterxml.jackson.core:jackson-core:2.6.6'
+  compile 'com.amazonaws:aws-java-sdk-dynamodb:1.11.14'
+  compile 'com.amazonaws:aws-java-sdk-cloudwatch:1.11.14'
+  compile 'com.amazonaws:aws-java-sdk-kinesis:1.11.14'
+  compile 'org.apache.httpcomponents:httpclient:4.5.2'
+  compile 'org.apache.httpcomponents:httpcore:4.4.4'
+  compile 'com.fasterxml.jackson.core:jackson-annotations:2.6.0'
+  compile 'com.google.protobuf:protobuf-java:2.6.1'
+}
+
+task generateGemJarRequiresFile {
+    doLast {
+        File jars_file = file('lib/logstash-input-kinesis_jars.rb')
+        jars_file.newWriter().withWriter { w ->
+            w << "# AUTOGENERATED BY THE GRADLE SCRIPT. DO NOT EDIT.\n\n"
+            w << "require \'jar_dependencies\'\n"
+            configurations.runtime.allDependencies.each {
+                w << "require_jar(\'${it.group}\', \'${it.name}\', \'${it.version}\')\n"
+            }
+        }
+    }
+}
+
+task vendor {
+    doLast {
+        String vendorPathPrefix = "vendor/jar-dependencies"
+        configurations.runtime.allDependencies.each { dep ->
+            File f = configurations.runtime.filter { it.absolutePath.contains("${dep.group}/${dep.name}/${dep.version}") }.singleFile
+            String groupPath = dep.group.replaceAll('\\.', '/')
+            File newJarFile = file("${vendorPathPrefix}/${groupPath}/${dep.name}/${dep.version}/${dep.name}-${dep.version}.jar")
+            newJarFile.mkdirs()
+            Files.copy(f.toPath(), newJarFile.toPath(), REPLACE_EXISTING)
+        }
+    }
+}
+
+vendor.dependsOn(generateGemJarRequiresFile)

gradle.properties

@@ -0,0 +1 @@
+org.gradle.daemon=false

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Wed Jun 21 11:39:16 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.0-all.zip