Cobertura action

GitHub Action which parse a XML cobertura report and display the metrics in a GitHub Pull Request.

Many coverage tools can be configured to output cobertura reports:

• coverage.py
• Istanbul
• Maven
• simplecov

This action will not currently work when triggered by pull requests from forks, like is common in open source projects. This is because the token for forked pull request workflows does not have write permissions on the target repository. Hopefully GitHub will have a solution for this in the future. In the meantime one can use utilize multiple workflows and artifacts to circumvent this. See the workflows in this project for an implementation example and this blog post https://securitylab.github.com/research/github-actions-preventing-pwn-requests.

How it looks like

A comment is added to the pull request with the coverage report.

A check is added to the workflow run.

The check will succeed or fail based on your threshold when fail_below_threshold is set to true, this allows you to mandate coverage checks pass on your protected branches.

Inputs

repo_token

The GITHUB_TOKEN. Defaults to ${{github.token}}

path

The path to the cobertura report. Defaults to coverage.xml. Glob pattern is supported, for example coverage/*.xml.

prefix_path

This prefix is added to every filename within the cobertura report. This can resolve issues with link_missing_lines URLs and only_changed_files.

skip_covered

If files with 100% coverage should be ignored. Defaults to true.

minimum_coverage

The minimum allowed coverage percentage as an integer.

fail_below_threshold

Fail the action when the minimum coverage was not met.

show_line

Show line rate as specific column.

show_branch

Show branch rate as specific column.

show_class_names

Show class names instead of file names.

show_missing

Show line numbers of statements, per module, that weren't executed.

show_missing_max_length

Crop missing line numbers strings that exceeds this length, provided as an integer.

Default is no crop.

(Note: "…" is appended to a cropped string)

link_missing_lines

Link missing line numbers. This only has an effect when show_missing is set to true. Defaults to false.

only_changed_files

Only show coverage for changed files.

report_name

Use a unique name for the report and comment.

pull_request_number Optional

Pull request number associated with the report. This property should be used when workflow trigger is different than pull_request.

If no pull request can determine the action will skip adding the comment.

Example usage

on:
  pull_request:
    types: [opened]
    branches:
      - master
jobs:
  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: 5monkeys/cobertura-action@master
        with:
          path: src/test.xml
          minimum_coverage: 75

Development

• Install deps: npm ci
• Run tests: npm run test
• Run lint: npm run lint
• Package application npm run package. Remember to run this before committing anything.