Download maven artifacts from nexus via ansible only if artifact SHA1 checksum changed

AnsibleMavenDownload.yml

---

- name: Get package info from nexus
  uri: url=http://{{host}}/service/local/artifact/maven/resolve?g={{group_id}}&a={{artifact_id}}&v={{artifact_version}}&r={{repository}}&p={{packaging}}
    HEADER_Accept="application/json"
    return_content=yes
  register: nexus_result

- name: Save SHA1 checksum of package
  copy: content="{{nexus_result.json.data.sha1}}" dest="./{{artifact_id}}.{{packaging}}.sha1"
  register: package_sha1

- name: Download package from nexus
  get_url: url=http://{{host}}/service/local/artifact/maven/content?g={{group_id}}&a={{artifact_id}}&v={{artifact_version}}&r={{repository}}&p={{packaging}}
    dest="./{{artifact_id}}.{{packaging}}"
    force=yes
  when: package_sha1.changed
  register: nexus_package