Including files support

[aegershman]

(Updated & ready for actual consideration)

In our deployments, we'd like to include files, such as javadoc or sources or stubs. I was inspired by this issue on Patrick's upstream repository.

You can get artifacts auxiliary to the primary artifact:

jobs:
- name: my-job
  plan:
  - get: source-code
  - get: artifact
    trigger: true
    params:
      artifactItems:
        javadoc: jar
        stubs: jar
        diagram: pdf

You can put artifact files auxiliary to the primary artifact:

- put: maven-milestone
      params:
        # matches only on some-artifact-name-0-0-1.beta.12.jar
        file: artifact/my-artifact-*[0-9].*[0-9].*[0-9]-beta.*[0-9].jar
        files:
          javadoc: artifact/my-artifact-*-javadoc.jar
          sources: artifact/my-artifact-*-sources.jar
        pom_file: project/pom.xml
        version_file: version/version

This will only check on the "primary" artifact specified in source.

Here's the docker image I'm using for my changes: https://hub.docker.com/r/aegershman/maven-resource-with-classifiers/