Is it possible pickup plugin version number from a platform?

Help/Discuss
1

I have a platform that defines the spring boot version to use

plugins {
    `java-platform`
}

javaPlatform {
    allowDependencies()
}

group = "com.example.platform"
version = "1.0.0"

val springBootVersion="2.4.1"

dependencies {
    api(platform("org.springframework.boot:spring-boot-dependencies:$springBootVersion"))
    api(platform("org.testcontainers:testcontainers-bom:1.15.1"))
    
    constraints {
        api("com.google.guava:guava:30.1-jre")
  
        // testing dependencies
        api("com.icegreen:greenmail:1.6.1")
        api("nl.jqno.equalsverifier:equalsverifier:3.5")
        api("org.threeten:threeten-extra:1.5.0")
        // boot gradle plugin

        api("org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion")
    }
}

When I use the above paltform in a Spring Boot project I still have to set the version number like what you see below 2.4.1 has to be set explicitly. Is there a way in the settings.gradle.kts to indicate the version numbers of all plugins used from the values in the platform?

plugins {
    id("org.springframework.boot") version "2.4.1"
    `java-library`
}

dependencies {

    developmentOnly(platform("com.examples.platforms:primary:1.0.0" ))
    developmentOnly("org.springframework.boot:spring-boot-devtools")

    implementation(platform("com.example.platforms:primary:1.0.0" ))
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("org.springframework.boot:spring-boot-starter-actuator")
    implementation("org.springframework.boot:spring-boot-starter-thymeleaf")
    implementation("org.springframework.boot:spring-boot-starter-validation")

    testImplementation(platform("com.example.platforms:primary:1.0.0" ))
    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("nl.jqno.equalsverifier:equalsverifier")
}
2

Kinda necropost, but anyway. I believe that if you define a plugin in your rootProject like so:
id("org.springframework.boot") version "2.4.1" apply false
and then in a subprojects use just id("org.springframework.boot") then it will inherit version from the rootProject

3

You could, but it hast not really much to do with the question, does it?

The more idiomatic way anyway would be to use a pluginManagement { plugins { ... } } block to define the version, then you can even apply it wihtout version in the root project.

But the question was how to take the version from a platform.
This might maybe work if you use the platform like buildscript { dependencies { classpath(platform(...)) } }, but I didn’t try that yet.

Another way would be to define the plugin version in a version catalog and use it from there.