Use gradle plugin to configure another gradle plugin - gradle

Question

I want to implement a gradle plugin which changes the project.version according to the configuration of the plugin and then use the changed project.version to configure another gradle plugin e.g. for building containers. The problem is now that both configurations are evaluated at the same time and therefore the changes to project.version are not applied at the time the second plugin is configured.
I search the Gradle documentation but found nothing regarding my problem.
build.gradle
class VersionPluginExtension {
String major
String minor
String patch
}
class VersionPlugin implements Plugin<Project> {
void apply(Project project) {
def extension = project.extensions.create('versionPlugin', VersionPluginExtension)
project.afterEvaluate {
project.version = "${extension.major}.${extension.minor}.${extension.patch}"
}
project.task('showVersion') {
doLast {
println "${project.version}"
}
}
}
}
class ContainerPluginExtension {
String version
}
class ContainerPlugin implements Plugin<Project> {
void apply(Project project) {
def extension = project.extensions.create('containerPlugin', ContainerPluginExtension)
project.task('build') {
doLast {
println "${extension.version}"
}
}
}
}
apply plugin: VersionPlugin
apply plugin: ContainerPlugin
versionPlugin {
major = '1'
minor = '1'
patch = '1'
}
containerPlugin {
version = project.version
}
I expect that the task build returns 1.1.1 and not unspecified but I think it's not possible in this way. I hope someone can point me in the right direction.
Thanks!

Answer 1

Move the definition of version from the containerPlugin block to the plugin definition :
class ContainerPlugin implements Plugin<Project> {
void apply(Project project) {
def extension = project.extensions.create('containerPlugin', ContainerPluginExtension)
project.afterEvaluate {
extension.version = project.version
}
project.task('build') {
doLast {
println "${extension.version}"
}
}
}
}
Result :
$ gradle build
> Task :build
1.1.1

Answer 2

The solution to the problem above looks like this:
class VersionPluginExtension {
String major
String minor
String patch
private String version
String getVersion() {
if (!version)
return "${major}.${minor}.${patch}"
return version
}
}
class VersionPlugin implements Plugin<Project> {
void apply(Project project) {
def extension = project.extensions.create('versionPlugin', VersionPluginExtension)
project.task('showVersion') {
doLast {
println "${extension.version}"
}
}
}
}
class ContainerPluginExtension {
String version
}
class ContainerPlugin implements Plugin<Project> {
void apply(Project project) {
def extension = project.extensions.create('containerPlugin', ContainerPluginExtension)
project.task('build') {
doLast {
println "${extension.version}"
}
}
}
}
apply plugin: VersionPlugin
apply plugin: ContainerPlugin
versionPlugin {
major = '1'
minor = '1'
patch = '1'
}
project.version = versionPlugin.version
containerPlugin {
version = project.version
}
Result:
> Configure project :
1.1.1
> Task :showVersion
1.1.1
> Task :build
1.1.1