roles/pycobertura-diff/tasks/main.yaml

- name: Generate pycobertura report
  shell: |
    set -ex

    pycobertura show --format html --output "{{ ansible_user_dir }}/zuul-output/logs/coverage-previous.html" \
      --source "{{ previous_source_prefix }}/{{ zuul.project.canonical_hostname }}/{{ zuul.project.name}}" \
      "{{ ansible_user_dir }}/coverage-previous.xml"

    pycobertura show --format html --output "{{ ansible_user_dir }}/zuul-output/logs/coverage-current.html" \
      --source "{{ zuul.project.src_dir }}" \
      "{{ ansible_user_dir }}/coverage-current.xml"

    pycobertura diff --format html --output "{{ ansible_user_dir }}/zuul-output/logs/coverage-diff.html" \
      --source1 "{{ previous_source_prefix }}/{{ zuul.project.canonical_hostname }}/{{ zuul.project.name}}" "{{ ansible_user_dir }}/coverage-previous.xml" \
      --source2 "{{ zuul.project.src_dir }}" "{{ ansible_user_dir }}/coverage-current.xml"

    sed -e 's;^  </body>$;    <p>Show <a href="coverage-current.html">previous</a> or <a href="coverage-current.html">final coverage</a> only</p>\n  </body>;' \
      -i "{{ ansible_user_dir }}/zuul-output/logs/coverage-diff.html" || true