roles/pycobertura-diff/tasks/main.yaml

- name: Generate pycobertura report
  shell: |
    set -ex
    PATH=${PATH}:~/.local/bin
    pycobertura show --format html --output "{{ ansible_user_dir }}/zuul-output/logs/coverage.html" \
      --source "{{ new_source_prefix }}/{{ zuul.project.short_name }}" "{{ new_source_prefix }}/coverage.xml"
    pycobertura diff --format html --output "{{ ansible_user_dir }}/zuul-output/logs/coverage-diff.html" \
      --source1 "{{ zuul.project.src_dir }}" "{{ coverage_xml_dir }}/coverage.xml" \
      --source2 "{{ new_source_prefix }}/{{ zuul.project.short_name }}" "{{ new_source_prefix }}/coverage.xml"
    sed -e 's;^  </body>$;    <p>Show <a href="coverage.html">final coverage</a> only</p>\n  </body>;' \
      -i "{{ ansible_user_dir }}/zuul-output/logs/coverage-diff.html"

- name: Check for coverage-diff.html
  stat:
    path: "{{ ansible_user_dir }}/zuul-output/logs/coverage-diff.html"
    get_checksum: false
    get_mime: false
    get_md5: false
  register: coverage_diff_html_stat

- name: Check for coverage.html
  stat:
    path: "{{ ansible_user_dir }}/zuul-output/logs/coverage.html"
    get_checksum: false
    get_mime: false
    get_md5: false
  register: coverage_html_stat

- name: Register coverage reports as artifacts
  when: coverage_html_stat.stat.exists
  zuul_return:
    data:
      zuul:
        artifacts:
          - name: "Full coverage report"
            url: "coverage.html"

- name: Register coverage reports as artifacts
  when: coverage_diff_html_stat.stat.exists
  zuul_return:
    data:
      zuul:
        artifacts:
          - name: "Change of code coverage report"
            url: "coverage-diff.html"