build.gradle

plugins {
    id 'java'
    id 'maven-publish'
}

def ENV = System.getenv()

group 'org.example'
version '1.20.0'

repositories {
    mavenCentral()
}

dependencies {
    implementation("com.google.guava:guava:31.0.1-jre")

    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.0'
}

test {
    useJUnitPlatform()
}

// configure the maven publication
publishing {
    publications {
        maven(MavenPublication) {
            artifactId = archivesBaseName
            version = version
            groupId = group

            from components.java
        }
    }

    // select the repositories you want to publish to
    repositories {
        if (ENV.MAVEN_URL) {
            maven {
                url ENV.MAVEN_URL
                credentials {
                    username ENV.MAVEN_USERNAME
                    password ENV.MAVEN_PASSWORD
                }
            }
        }
    }
}