switch to circleci 2.0, bump gradle, implement lib caching (linkedin#53)

.circleci/config.yml

@@ -0,0 +1,56 @@
+version: 2
+
+jobs:
+
+   build:
+     working_directory: ~/workspace
+     docker:
+       - image: circleci/openjdk:8-jdk
+     steps:
+       - checkout
+       - restore_cache:
+           key: dependency-cache-{{ checksum "build.gradle" }}
+       - run:
+           command: ./gradlew resolveDependencies
+       - save_cache:
+           key: dependency-cache-{{ checksum "build.gradle" }}
+           paths:
+             - ~/.gradle/caches
+             - ~/.gradle/wrapper
+       - run:
+           command: ./gradlew clean build
+       - run:
+           command: mkdir ~/test-results
+       - run:
+           command: find ~/workspace -type f -regex ".*/test-results/.*xml" -exec ln {} ~/test-results/ \;
+       - store_test_results:
+           path: ~/test-results
+       - store_artifacts:
+           path: ~/test-results
+       - store_artifacts:
+           path: build/libs
+
+   publish:
+     working_directory: ~/workspace
+     docker:
+       - image: circleci/openjdk:8-jdk
+     steps:
+       - checkout
+       - restore_cache:
+           key: dependency-cache-{{ checksum "build.gradle" }}
+       - run:
+           command: ./gradlew assemble testJar
+       - run:
+           command: ./.circleci/publishOnCommitMsg.sh
+
+workflows:
+  version: 2
+  build-and-publish:
+    jobs:
+      - build
+      - publish:
+          requires:
+            - build
+          filters:
+            branches:
+              only: master

.circleci/publishOnCommitMsg.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+if git log -1 --pretty=%B | grep "^RELEASE.*";
+then
+   echo "Publishing a release"
+   ./gradlew distributeBuild
+else
+   echo "Not a release"
+fi
+

build.gradle

@@ -4,10 +4,6 @@
  * See License in the project root for license information.
  */
 
-import com.linkedin.gradle.build.DistributeTask
-
-group = 'com.linkedin.kafka.clients'
-
 buildscript {
     repositories {
         jcenter()
@@ -17,6 +13,14 @@ buildscript {
     }
 }
 
+plugins {
+    id 'io.ehdev.gradle.dependency-resolve' version '0.0.24'
+}
+
+group = 'com.linkedin.kafka.clients'
+
+import com.linkedin.gradle.build.DistributeTask
+
 apply plugin: 'java'
 apply plugin: 'scala'
 apply plugin: 'eclipse'
@@ -164,5 +168,5 @@ task distributeBuild(type: DistributeTask) {
 //wrapper generation task
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '3.3'
+    gradleVersion = '3.5'
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Tue Feb 14 15:08:09 PST 2017
+#Wed Jul 19 11:36:50 PDT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-bin.zip

settings.gradle

@@ -1,4 +1,10 @@
 /*
  * Copyright 2017 LinkedIn Corp. Licensed under the BSD 2-Clause License (the "License").
 See License in the project root for license information.
  */
-
+pluginManagement {
+  repositories {
+    gradlePluginPortal()
+    maven { url 'https://dl.bintray.com/ethankhall/crom/' }
+    maven { url 'https://dl.bintray.com/ethankhall/gradle-plugins/' }
+  }
+}