This GitHub Action (written in JavaScript) allows you to leverage GitHub Actions to report the code coverage from LCOV files. This action includes:

• Generating an HTML report as an artifact
• Commenting on a pull request (if the workflow was triggered by this event)
• Failing if a minimum coverage is not met

Create a workflow .yml file in your .github/workflows directory. An example workflow is available below. For more information, reference the GitHub Help Documentation for Creating a workflow file.

For more information on these inputs, see the Workflow syntax for GitHub Actions

• coverage-files: The coverage files to scan. For example, coverage/lcov.*.info
• artifact-name: The GitHub artifact name of the generated HTML report. For example, code-coverage-report. Note: When downloading, it will be extracted in an html directory. Optional. Default: `` (Skips uploading of artifacts)
• minimum-coverage: The minimum coverage to pass the check. Optional. Default: 0 (always passes)
• github-token: Set the ${{ secrets.GITHUB_TOKEN }} token to have the action comment the coverage summary in the pull request. This token is provided by Actions, you do not need to create your own token. Optional. Default: ``
• working-directory: The working directory containing the source files referenced in the LCOV files. Optional. Default: ./
• title-prefix: A prefix before the title "LCOV of commit...". Optional. Default: ``
• additional-message: Custom text appended to the code coverage comment in the pull request. Optional. Default: ``
• update-comment: Set to true to update the previous code coverage comment if such exists. When set to false, a new comment is always created. Optional. Default: false

• total-coverage: The total coverage from scanned files.

Sample comment:

on: pull_request

name: Continuous Integration

jobs:
  coverage_report:
    name: Generate coverage report
    needs: testing
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v2
    # ... Generate LCOV files or download it from a different job
    - name: Setup LCOV
      uses: hrishikesh-kadam/setup-lcov@v1
    - name: Report code coverage
      uses: zgosalvez/github-actions-report-lcov@v3
      with:
        coverage-files: coverage/lcov.*.info
        minimum-coverage: 90
        artifact-name: code-coverage-report
        github-token: ${{ secrets.GITHUB_TOKEN }}
        working-directory: apps/my-first-app
        update-comment: true

Note: Only the pull_request and pull_request_target events are supported. This action does nothing when triggered by other event types.

This is used in my opinionated GitHub Actions: Flutter Workflows repository along with other actions for a complete end-to-end DevOps experience.

The scripts and documentation in this project are released under the MIT License