How to import dependecies from build.gradle to pom.xml - maven

Question

I use maven-publish plugin for deploying android library(.aar).
My library has another dependencies, which are also .aar
How can I import all dependencies from build.gradle, dependencies section:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
compile 'com.android.support:support-v4:23.1.1'
compile ('com.android.support:recyclerview-v7:22.2.1'){
exclude group: 'com.android.support', module: 'support-v4'
}
compile 'com.inthecheesefactory.thecheeselibrary:stated-fragment-support-v4:0.10.0'
//Http communication, websockets, etc.
compile 'com.squareup.okhttp:okhttp:2.4.0'
compile 'com.squareup.retrofit:retrofit:1.9.0'
//Fonts
compile 'uk.co.chrisjenx:calligraphy:2.1.0'
//Unit tests
testCompile 'junit:junit:4.12'
testCompile 'org.mockito:mockito-core:1.9.5'
//Other
compile ('org.apache.commons:commons-lang3:3.4'){
exclude group: 'org.apache.httpcomponents'
}
//Reactive programmnig
compile 'io.reactivex:rxjava:1.0.13'
compile 'io.reactivex:rxandroid:0.25.0'
compile 'com.github.bumptech.glide:glide:3.6.1'
}
To generated pom.xml dependencies section:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.my.sdk</groupId>
<artifactId>SDK</artifactId>
<version>0.0.1</version>
<packaging>aar</packaging>
<dependencies>
...
</dependencies>
</project>
I found some explanation how to do similar things:
Optional Gradle dependencies for Maven libraries
How to change artifactory runtime scope to compile scope?
https://issues.gradle.org/browse/GRADLE-1749
http://www.scriptscoop.net/t/6ac07fb41846/how-to-maven-publish-a-gradle-project-jar-with-provided-scope.html
So, I understood, that I should use pom.withXml, import all dependecies from project.configurations.compile.allDependencies with scope compile, and put it into asNode().dependencies
But I'm not familiar with it, and I think I doing something wrong. Here is my current code:
publishing {
publications {
maven(MavenPublication) {
artifact "${project.buildDir}/outputs/aar/${project.name}-release.aar"
artifactId = POM_ARTIFACT_ID
groupId = GROUP
version = VERSION_NAME
// Task androidSourcesJar is provided by gradle-mvn-push.gradle
//artifact androidSourcesJar {
// classifier "sources"
//}
pom.withXml {
def depsNode = asNode().dependencies.'*'
project.configurations.compile.allDependencies.each { dep ->
if(dep.name != null && dep.group != null && dep.version != null) {
def depNode = new Node(null, 'dependency')
def groupIdNode = new Node(depNode, 'groupId', dep.getGroup())
def artifactIdNode = new Node(depNode, 'artifactId', dep.getName())
def versionNode = new Node(depNode, 'version', dep.getVersion())
depsNode.add(depNode)
println depsNode
}
}
}
}
}
repositories {
maven {
credentials {
username System.getenv('NEXUS_USER_NAME')
password System.getenv('NEXUS_PASSWORD')
}
url "http://nexus-repo"
}
}
}

Answer 1

To publish a .aar library with the dependencies listed correctly in pom.xml, it might be easier to use this plugin, rather than assemble the dependencies section yourself using the maven-publish plugin.
To apply plugin:
plugins {
id "com.github.dcendents.android-maven" version "1.3"
}
and run task install to push library to local .m2 repo.
You can override the repo being published to like this:
install {
repositories {
mavenDeployer {
repository(...)
}
}
}
You can of course, continue to use the maven-publish plugin if you so prefer. In your code, you're looking for depsNode which does not already exist. You likely need to create a new Node for depsNode and add it to the pom first. Or just use append:
pom.withXml {
def depsNode = asNode().appendNode('dependencies')
configurations.compile.allDependencies.each { dep ->
def depNode = depsNode.appendNode('dependency')
depNode.appendNode('groupId', dep.group)
depNode.appendNode('artifactId', dep.name)
depNode.appendNode('version', dep.version)
//optional add scope
//optional add transitive exclusions
}
}
The caveat here is that, you still need to handle exclusions correctly. Also, if you have variants in your project, and have different compile configurations such as androidCompile or somethingElseCompile, you need to handle those correctly as well.

Answer 2

You can update the dependencies with the dependencies of another project or library in the maven publish task. This has to be done before jar generation task. In this way, the changes will be reflected in the pom generation and no need for pom xml manipulation. getDependencies is the method that you extract those dependencies and you should implement it ;)
This is the snippet in the publish task
artifactId = POM_ARTIFACT_ID
groupId = GROUP
version = VERSION_NAME
project.configurations.implementation.withDependencies { dependencies ->
dependencies.addAll(getDependencies(project))
}
from components.java