How to define dependency version only once for whole Gradle multi-module project? - gradle

Question

I made a decision to migrate from Dependency Management Plugin to Gradle built-in BOM import support. Since Gradle built-in BOM import support has better performance But
I run into the issue:
I cannot find alternatives for dependency and dependencySet in native Gradle:
dependencyManagement {
dependencies {
dependency("org.springframework:spring-core:4.0.3.RELEASE")
}
}
//or
dependencyManagement {
dependencies {
dependencySet(group:'org.slf4j', version: '1.7.7') {
entry 'slf4j-api'
entry 'slf4j-simple'
}
}
}
and then I could use dependency without version
dependencies {
compile 'org.springframework:spring-core'
}
How can I get the same behavior in naive Gradle? I mean: I'd like to define a version once as I did it when using Dependency Management Plugin

Answer 1

Solution below helps to avoid versions copy-paste. However it isn't the same with Dependency Management plugin.
For Gradle Kotlin Dsl:
You can create buildSrc with you own code, when you can place any constants.
Algorithm:
Create folder buildSrc/src/main/kotlin
Create file buildSrc/src/main/kotlin/Versions.kt with content:
object Versions {
const val junitVersion = "5.5.5" // just example
}
Create file buildSrc/build.gradle.kts with content:
plugins {
`kotlin-dsl`
}
Use the following syntax in your gradle.kts files:
dependencies {
testImplementation("org.junit.jupiter:junit-jupiter:${Versions.junitVersion}")
}
For Gradle Groovy:
Create file gradle.properties
Put versions there with syntax like okhttp_version=4.2.0
Use the following syntax in your gradle files:
dependencies {
compile group: 'com.squareup.okhttp3', name: 'okhttp', version: okhttp_version
}

Answer 2

You can do so on the gradle.properties file. I.e.:
# APPLICATION PROPERTIES
name=projectName
group=com.domain
version=1.0.0
description=A brief description
gradleScripts=https://raw.githubusercontent.com/hexagonkt/hexagon/1.2.0/gradle
# DEPENDENCIES VERSIONS
kotlinVersion=1.3.61
kotlinCoroutinesVersion=1.3.2
Or in settings.gradle if you don't want to create another file:
rootProject.name = "hexagon-contact-application"
gradle.rootProject {
allprojects {
version = "1.0.0"
group = "org.hexagonkt"
description = "Contact application backend api"
}
extensions.gradleScripts = "https://raw.githubusercontent.com/hexagonkt/hexagon/1.0.18/gradle"
extensions.kotlinVersion = "1.3.50"
extensions.kotlinCoroutinesVersion = "1.3.2"
extensions.hexagonVersion = "1.0.21"
extensions.logbackVersion = "1.2.3"
extensions.bcryptVersion="0.8.0"
extensions.javaJwtVersion="3.8.2"
}
And if you want to avoid adding the version variable to all related dependencies, you can create a method in the build file:
plugins {
id 'org.jetbrains.kotlin.jvm' version '1.3.50'
}
apply from: "$gradleScripts/kotlin.gradle"
apply from: "$gradleScripts/service.gradle"
apply from: "$gradleScripts/junit.gradle"
defaultTasks("test")
mainClassName = 'com.hexagonkt.contact.ApplicationKt'
applicationDefaultJvmArgs = ["-Xms64M", "-Xmx2G", "-XX:+UseNUMA", "-XX:+UseParallelGC"]
dependencies {
httpkt(it, "http_server_jetty")
httpkt(it, "store_mongodb")
httpkt(it, "hexagon_web")
implementation("at.favre.lib:bcrypt:$bcryptVersion")
implementation("com.auth0:java-jwt:$javaJwtVersion")
testImplementation("com.hexagonkt:port_http_client:$hexagonVersion")
}
private void httpkt(final def dependencies, final String artifact) {
dependencies.implementation("com.hexagonkt:$artifact:$hexagonVersion")
}