Gradle mapping for `compile project(:dependency)` maven dependencies? - maven

Question

I'm having multi-project Gradle config:
-- root (folder 'gradle_test')
L--wrapper (depends on some 3rd-party maven libs)
L--module1 (depends on wrapper)
L--app
I need module1 jar (and wrapper jar as transitive dependency) to be published in local maven repo.
root build.gradle:
// for maven
ext {
groupId = 'mygroup'
version = '3.0'
}
wrapper build.gradle:
apply plugin: 'maven'
...
// maven pom
install {
repositories.mavenInstaller {
pom.groupId = rootProject.ext.groupId
pom.artifactId = 'wrapper'
pom.version = rootProject.ext.version
}
}
module1 build.gradle:
dependencies {
compile project(':wrapper')
...
}
// maven pom
install {
repositories.mavenInstaller {
pom.groupId = rootProject.ext.groupId
pom.artifactId = 'module1'
pom.version = rootProject.ext.version
}
}
Howeven when installing module1 into local maven cache i can see dependency to 'wrapper' module is generated incorrectly (version is not specified). module1 pom.xml in repo:
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>mygroup</groupId>
<artifactId>module1</artifactId>
<version>3.0</version>
<dependencies>
<dependency>
<groupId>gradle_test</groupId> // error 1: gradle project name (instead of overriden mvn groupId)
<artifactId>wrapper</artifactId>
<version>unspecified</version> // error 2: not set at all
<scope>compile</scope>
</dependency>
</dependencies>
</project>
In other words Gradle does not use maven module groupId/artifactId/version for maven dependencies mapped from compile project(:wrapper) declaration.
How can i do/fix it?

Answer 1

I had to write for wrapper and module1:
// mvn
group = rootProject.ext.groupId
version = rootProject.ext.version
and you can remove:
install {
repositories.mavenInstaller {
...
}
}
since Gradle will use project.group as mvn module groupId and project.version as mvn module version:
https://docs.gradle.org/current/userguide/maven_plugin.html#sec:maven_pom_generation