all: add gradle format checker

This PR adds an automatic gradle format checker and reformats all the *.gradle files. After this, new changes to *.gradle files will fail to build if not in good format, just like checkStyle failure.

7 files changed, 134 insertions, 192 deletions

diff --git a/examples/android/clientcache/app/build.gradle b/examples/android/clientcache/app/build.gradle
index d0d84bd35..bec1a6a5e 100644
--- a/examples/android/clientcache/app/build.gradle
+++ b/examples/android/clientcache/app/build.gradle
@@ -14,9 +14,7 @@ android {
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
-        debug {
-            minifyEnabled false
-        }
+        debug { minifyEnabled false }
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
@@ -30,25 +28,18 @@ android {
 }
 
 protobuf {
-    protoc {
-        artifact = 'com.google.protobuf:protoc:3.4.0'
-    }
+    protoc { artifact = 'com.google.protobuf:protoc:3.4.0' }
     plugins {
-        javalite {
-            artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
-        }
-        grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        javalite { artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0" }
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
         all().each { task ->
             task.plugins {
                 javalite {}
-                grpc {
-                    // Options added to --grpc_out
-                    option 'lite'
-                }
+                grpc { // Options added to --grpc_out
+                    option 'lite' }
             }
         }
     }
diff --git a/examples/android/helloworld/app/build.gradle b/examples/android/helloworld/app/build.gradle
index 8f980c87b..f46a397ab 100644
--- a/examples/android/helloworld/app/build.gradle
+++ b/examples/android/helloworld/app/build.gradle
@@ -13,9 +13,7 @@ android {
         versionName "1.0"
     }
     buildTypes {
-        debug {
-            minifyEnabled false
-        }
+        debug { minifyEnabled false }
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
@@ -29,25 +27,18 @@ android {
 }
 
 protobuf {
-    protoc {
-        artifact = 'com.google.protobuf:protoc:3.5.1-1'
-    }
+    protoc { artifact = 'com.google.protobuf:protoc:3.5.1-1' }
     plugins {
-        javalite {
-            artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
-        }
-        grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        javalite { artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0" }
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
         all().each { task ->
             task.plugins {
                 javalite {}
-                grpc {
-                    // Options added to --grpc_out
-                    option 'lite'
-                }
+                grpc { // Options added to --grpc_out
+                    option 'lite' }
             }
         }
     }
diff --git a/examples/android/routeguide/app/build.gradle b/examples/android/routeguide/app/build.gradle
index b69c3b99e..2e2465bdc 100644
--- a/examples/android/routeguide/app/build.gradle
+++ b/examples/android/routeguide/app/build.gradle
@@ -5,16 +5,14 @@ android {
     compileSdkVersion 27
 
     defaultConfig {
-    applicationId "io.grpc.routeguideexample"
+        applicationId "io.grpc.routeguideexample"
         minSdkVersion 14
         targetSdkVersion 27
         versionCode 1
         versionName "1.0"
     }
     buildTypes {
-        debug {
-            minifyEnabled false
-        }
+        debug { minifyEnabled false }
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
@@ -28,25 +26,18 @@ android {
 }
 
 protobuf {
-    protoc {
-        artifact = 'com.google.protobuf:protoc:3.5.1-1'
-    }
+    protoc { artifact = 'com.google.protobuf:protoc:3.5.1-1' }
     plugins {
-        javalite {
-            artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
-        }
-        grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        javalite { artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0" }
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
         all().each { task ->
             task.plugins {
                 javalite {}
-                grpc {
-                    // Options added to --grpc_out
-                    option 'lite'
-                }
+                grpc { // Options added to --grpc_out
+                    option 'lite' }
             }
         }
     }
diff --git a/examples/android/routeguide/build.gradle b/examples/android/routeguide/build.gradle
index 7b299d637..b0692f9d1 100644
--- a/examples/android/routeguide/build.gradle
+++ b/examples/android/routeguide/build.gradle
@@ -22,6 +22,4 @@ allprojects {
     }
 }
 
-task clean(type: Delete) {
-    delete rootProject.buildDir
-}
+task clean(type: Delete) { delete rootProject.buildDir }
diff --git a/examples/build.gradle b/examples/build.gradle
index 32d83dc02..1e0f81a78 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -2,25 +2,19 @@ apply plugin: 'java'
 apply plugin: 'com.google.protobuf'
 
 buildscript {
-  repositories {
-    maven {
-      // The google mirror is less flaky than mavenCentral()
-      url "https://maven-central.storage-download.googleapis.com/repos/central/data/"
+    repositories {
+        maven { // The google mirror is less flaky than mavenCentral()
+            url "https://maven-central.storage-download.googleapis.com/repos/central/data/" }
     }
-  }
-  dependencies {
-    // ASSUMES GRADLE 2.12 OR HIGHER. Use plugin version 0.7.5 with earlier
-    // gradle versions
-    classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.3'
-  }
+    dependencies { // ASSUMES GRADLE 2.12 OR HIGHER. Use plugin version 0.7.5 with earlier
+        // gradle versions
+        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.3' }
 }
 
 repositories {
-  maven {
-      // The google mirror is less flaky than mavenCentral()
-    url "https://maven-central.storage-download.googleapis.com/repos/central/data/"
-  }
-  mavenLocal()
+    maven { // The google mirror is less flaky than mavenCentral()
+        url "https://maven-central.storage-download.googleapis.com/repos/central/data/" }
+    mavenLocal()
 }
 
 // IMPORTANT: You probably want the non-SNAPSHOT version of gRPC. Make sure you
@@ -34,37 +28,31 @@ def protobufVersion = '3.5.1'
 def protocVersion = '3.5.1-1'
 
 dependencies {
-  compile "com.google.api.grpc:proto-google-common-protos:1.0.0"
-  compile "io.grpc:grpc-alts:${grpcVersion}"
-  compile "io.grpc:grpc-netty:${grpcVersion}"
-  compile "io.grpc:grpc-protobuf:${grpcVersion}"
-  compile "io.grpc:grpc-stub:${grpcVersion}"
-  compileOnly "javax.annotation:javax.annotation-api:1.2"
+    compile "com.google.api.grpc:proto-google-common-protos:1.0.0"
+    compile "io.grpc:grpc-alts:${grpcVersion}"
+    compile "io.grpc:grpc-netty:${grpcVersion}"
+    compile "io.grpc:grpc-protobuf:${grpcVersion}"
+    compile "io.grpc:grpc-stub:${grpcVersion}"
+    compileOnly "javax.annotation:javax.annotation-api:1.2"
 
-  // Used for TLS in HelloWorldServerTls
-  compile "io.netty:netty-tcnative-boringssl-static:${nettyTcNativeVersion}"
+    // Used for TLS in HelloWorldServerTls
+    compile "io.netty:netty-tcnative-boringssl-static:${nettyTcNativeVersion}"
 
-  compile "com.google.protobuf:protobuf-java-util:${protobufVersion}"
+    compile "com.google.protobuf:protobuf-java-util:${protobufVersion}"
 
-  testCompile "io.grpc:grpc-testing:${grpcVersion}"
-  testCompile "junit:junit:4.12"
-  testCompile "org.mockito:mockito-core:1.9.5"
+    testCompile "io.grpc:grpc-testing:${grpcVersion}"
+    testCompile "junit:junit:4.12"
+    testCompile "org.mockito:mockito-core:1.9.5"
 }
 
 protobuf {
-  protoc {
-    artifact = "com.google.protobuf:protoc:${protocVersion}"
-  }
-  plugins {
-    grpc {
-      artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}"
+    protoc { artifact = "com.google.protobuf:protoc:${protocVersion}" }
+    plugins {
+        grpc { artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}" }
     }
-  }
-  generateProtoTasks {
-    all()*.plugins {
-      grpc {}
+    generateProtoTasks {
+        all()*.plugins { grpc {} }
     }
-  }
 }
 
 // Inform IDEs like IntelliJ IDEA, Eclipse or NetBeans about the generated code.
@@ -86,77 +74,77 @@ apply plugin: 'application'
 startScripts.enabled = false
 
 task routeGuideServer(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.routeguide.RouteGuideServer'
-  applicationName = 'route-guide-server'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.routeguide.RouteGuideServer'
+    applicationName = 'route-guide-server'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task routeGuideClient(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.routeguide.RouteGuideClient'
-  applicationName = 'route-guide-client'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.routeguide.RouteGuideClient'
+    applicationName = 'route-guide-client'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldServer(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.helloworld.HelloWorldServer'
-  applicationName = 'hello-world-server'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.helloworld.HelloWorldServer'
+    applicationName = 'hello-world-server'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldClient(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.helloworld.HelloWorldClient'
-  applicationName = 'hello-world-client'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.helloworld.HelloWorldClient'
+    applicationName = 'hello-world-client'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldAltsServer(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.alts.HelloWorldAltsServer'
-  applicationName = 'hello-world-alts-server'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.alts.HelloWorldAltsServer'
+    applicationName = 'hello-world-alts-server'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldAltsClient(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.alts.HelloWorldAltsClient'
-  applicationName = 'hello-world-alts-client'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.alts.HelloWorldAltsClient'
+    applicationName = 'hello-world-alts-client'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldTlsServer(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.helloworldtls.HelloWorldServerTls'
-  applicationName = 'hello-world-tls-server'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.helloworldtls.HelloWorldServerTls'
+    applicationName = 'hello-world-tls-server'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldTlsClient(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.helloworldtls.HelloWorldClientTls'
-  applicationName = 'hello-world-tls-client'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.helloworldtls.HelloWorldClientTls'
+    applicationName = 'hello-world-tls-client'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task compressingHelloWorldClient(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.experimental.CompressingHelloWorldClient'
-  applicationName = 'compressing-hello-world-client'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.experimental.CompressingHelloWorldClient'
+    applicationName = 'compressing-hello-world-client'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 applicationDistribution.into('bin') {
-  from(routeGuideServer)
-  from(routeGuideClient)
-  from(helloWorldServer)
-  from(helloWorldClient)
-  from(helloWorldAltsServer)
-  from(helloWorldAltsClient)
-  from(helloWorldTlsServer)
-  from(helloWorldTlsClient)
-  from(compressingHelloWorldClient)
-  fileMode = 0755
+    from(routeGuideServer)
+    from(routeGuideClient)
+    from(helloWorldServer)
+    from(helloWorldClient)
+    from(helloWorldAltsServer)
+    from(helloWorldAltsClient)
+    from(helloWorldTlsServer)
+    from(helloWorldTlsClient)
+    from(compressingHelloWorldClient)
+    fileMode = 0755
 }
diff --git a/examples/example-kotlin/android/helloworld/app/build.gradle b/examples/example-kotlin/android/helloworld/app/build.gradle
index 5e8a2e257..486ce3638 100644
--- a/examples/example-kotlin/android/helloworld/app/build.gradle
+++ b/examples/example-kotlin/android/helloworld/app/build.gradle
@@ -15,9 +15,7 @@ android {
         versionName "1.0"
     }
     buildTypes {
-        debug {
-            minifyEnabled false
-        }
+        debug { minifyEnabled false }
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
@@ -51,25 +49,18 @@ android {
 }
 
 protobuf {
-    protoc {
-        artifact = 'com.google.protobuf:protoc:3.5.1-1'
-    }
+    protoc { artifact = 'com.google.protobuf:protoc:3.5.1-1' }
     plugins {
-        javalite {
-            artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
-        }
-        grpc {
-            artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
+        javalite { artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0" }
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
         }
     }
     generateProtoTasks {
         all().each { task ->
             task.plugins {
                 javalite {}
-                grpc {
-                    // Options added to --grpc_out
-                    option 'lite'
-                }
+                grpc { // Options added to --grpc_out
+                    option 'lite' }
             }
         }
     }
@@ -86,6 +77,4 @@ dependencies {
     compile 'io.grpc:grpc-stub:1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 }
 
-repositories {
-    mavenCentral()
-}
+repositories { mavenCentral() }
diff --git a/examples/example-kotlin/build.gradle b/examples/example-kotlin/build.gradle
index d2b7cdfea..17ceddf8b 100644
--- a/examples/example-kotlin/build.gradle
+++ b/examples/example-kotlin/build.gradle
@@ -13,21 +13,21 @@ apply plugin: 'application'
 
 
 buildscript {
-  ext.kotlin_version = '1.2.21'
+    ext.kotlin_version = '1.2.21'
 
-  repositories {
-    mavenCentral()
-    mavenLocal()
-  }
-  dependencies {
-    classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.5'
-    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-  }
+    repositories {
+        mavenCentral()
+        mavenLocal()
+    }
+    dependencies {
+        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.5'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
 }
 
 repositories {
-  mavenCentral()
-  mavenLocal()
+    mavenCentral()
+    mavenLocal()
 }
 
 // IMPORTANT: You probably want the non-SNAPSHOT version of gRPC. Make sure you
@@ -38,51 +38,45 @@ repositories {
 def grpcVersion = '1.14.0-SNAPSHOT' // CURRENT_GRPC_VERSION
 
 dependencies {
-  compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
-  compile "com.google.api.grpc:proto-google-common-protos:1.0.0"
-  compile "io.grpc:grpc-netty:${grpcVersion}"
-  compile "io.grpc:grpc-protobuf:${grpcVersion}"
-  compile "io.grpc:grpc-stub:${grpcVersion}"
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    compile "com.google.api.grpc:proto-google-common-protos:1.0.0"
+    compile "io.grpc:grpc-netty:${grpcVersion}"
+    compile "io.grpc:grpc-protobuf:${grpcVersion}"
+    compile "io.grpc:grpc-stub:${grpcVersion}"
 
-  testCompile "io.grpc:grpc-testing:${grpcVersion}" // gRCP testing utilities
-  testCompile "junit:junit:4.12"
-  testCompile "org.mockito:mockito-core:1.9.5"
+    testCompile "io.grpc:grpc-testing:${grpcVersion}" // gRCP testing utilities
+    testCompile "junit:junit:4.12"
+    testCompile "org.mockito:mockito-core:1.9.5"
 }
 
 protobuf {
-  protoc {
-    artifact = 'com.google.protobuf:protoc:3.5.1-1'
-  }
-  plugins {
-    grpc {
-      artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}"
+    protoc { artifact = 'com.google.protobuf:protoc:3.5.1-1' }
+    plugins {
+        grpc { artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}" }
     }
-  }
-  generateProtoTasks {
-    all()*.plugins {
-      grpc {}
+    generateProtoTasks {
+        all()*.plugins { grpc {} }
     }
-  }
 }
 
 startScripts.enabled = false
 
 task helloWorldServer(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.helloworld.HelloWorldServer'
-  applicationName = 'hello-world-server'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.helloworld.HelloWorldServer'
+    applicationName = 'hello-world-server'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 task helloWorldClient(type: CreateStartScripts) {
-  mainClassName = 'io.grpc.examples.helloworld.HelloWorldClient'
-  applicationName = 'hello-world-client'
-  outputDir = new File(project.buildDir, 'tmp')
-  classpath = jar.outputs.files + project.configurations.runtime
+    mainClassName = 'io.grpc.examples.helloworld.HelloWorldClient'
+    applicationName = 'hello-world-client'
+    outputDir = new File(project.buildDir, 'tmp')
+    classpath = jar.outputs.files + project.configurations.runtime
 }
 
 applicationDistribution.into('bin') {
-  from(helloWorldServer)
-  from(helloWorldClient)
-  fileMode = 0755
+    from(helloWorldServer)
+    from(helloWorldClient)
+    fileMode = 0755
 }