build.gradle

buildscript {
    repositories {
        jcenter()
    }

    dependencies {
        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.7.7'
    }
}

allprojects {
    apply plugin: 'java'
    apply plugin: 'com.google.protobuf'
    apply plugin: 'idea'

    repositories {
        jcenter()
    }

    ext {
        ver = [
            protobuf: '3.0.0',
            grpc: '0.15.0'
        ]
    }

    dependencies {
        compile 'org.slf4j:slf4j-api:1.7.21'

        compile group: 'com.google.protobuf', name: 'protobuf-java', version: ver.protobuf
        compile group: 'com.google.protobuf', name: 'protobuf-java-util', version: ver.protobuf
        compile group: 'io.grpc', name: 'grpc-protobuf', version: ver.grpc

        testCompile 'junit:junit:4.12'
        testCompile 'org.assertj:assertj-core-java8:1.0.0m1'
    }

    protobuf {
        protoc {
            artifact = 'com.google.protobuf:protoc:' + ver.protobuf
        }

        plugins {
            grpc {
                artifact = 'io.grpc:protoc-gen-grpc-java:' + ver.grpc
            }
        }

        generateProtoTasks {
            all()*.plugins {
                grpc {}
            }
        }
    }

    idea {
        module {
            sourceDirs += file("${protobuf.generatedFilesBaseDir}/main/java");
            sourceDirs += file("${protobuf.generatedFilesBaseDir}/main/grpc");
            sourceDirs += file("${protobuf.generatedFilesBaseDir}/test/java");
            sourceDirs += file("${protobuf.generatedFilesBaseDir}/test/grpc");
        }
    }
}