how does helm goal work?

[jeusdi]

We're using fabric8 maven plugin in order to build and deploy our maven projects into kubernetes.

I don't quite figure out how to use fabric8:helm goal.

I've tried to get some details about what exactly it makes, but I don't quite get it:

$ mvn help:describe -Dgoal=helm -DgroupId=io.fabric8 -DartifactId=fabric8-maven-plugin -Ddetail

And this is the output:

fabric8:helm
  Description: Generates a Helm chart for the kubernetes resources
  Implementation: io.fabric8.maven.plugin.mojo.build.HelmMojo
  Language: java
  Bound to phase: pre-integration-test

  Available parameters:

    helm
      (no description available)

    kubernetesManifest (Default:
    ${basedir}/target/classes/META-INF/fabric8/kubernetes.yml)
      User property: fabric8.kubernetesManifest
      The generated kubernetes YAML file

    kubernetesTemplate (Default:
    ${basedir}/target/classes/META-INF/fabric8/k8s-template.yml)
      User property: fabric8.kubernetesTemplate
      The generated kubernetes YAML file

    skip (Default: false)
      User property: fabric8.skip
      (no description available)

    ...

Inside our projects we have out artifacts inside src/main/fabric8. The content of this folder is:

tree src/main/fabric8
src/main/fabric8
├── forum-configmap.yaml
├── forum-deployment.yaml
├── forum-route.yaml
└── forum-service.yaml

These are files only related with kubernetes.

I've not been able to find any snippet over there about:

1. Which kind of files do I need to add on my project? helm files?
2. Which is exactly the output of this goal?