bitcoinj/build.gradle

import org.gradle.util.GradleVersion

buildscript {
    repositories {
        mavenCentral()
    }
    // If using Gradle 7, use the compatible protobuf plugin, else use the one that works with oldest supported Gradle
    boolean isGradle7 = GradleVersion.current().compareTo(GradleVersion.version("7.0")) >= 0
    def gradleProtobufVersion = isGradle7 ? "0.8.18" : "0.8.10"
    if (isGradle7) {
        System.err.println "Warning: Using com.google.protobuf:protobuf-gradle-plugin:${gradleProtobufVersion} because ${GradleVersion.current()}"
    }
    dependencies {
        classpath "com.google.protobuf:protobuf-gradle-plugin:${gradleProtobufVersion}"
    }
}

allprojects {
    repositories {
        mavenCentral()
    }

    group = 'org.bitcoinj'
}