Scan your C and C++ code with SonarCloud

Using this GitHub Action, scan your code with SonarCloud to detect bugs, vulnerabilities and code smells in C and C++!

This GitHub action installs the latest versions of sonar-scanner and build-wrapper required for C and C++ SonarCloud analysis making the workflow simpler. For use with other programming languages see SonarCloud GitHub Action

SonarCloud is the leading product for Continuous Code Quality & Code Security online, totally free for open-source projects. It supports all major programming languages, including Java, JavaScript, TypeScript, C#, C and C++ and many more. If your code is closed source, SonarCloud also offers a paid plan to run private analyses.

Requirements

• Have an account on SonarCloud. Sign up for free now if it's not already the case!
• The repository to analyze is set up on SonarCloud. Set it up in just one click.

Usage

Project metadata, including the location to the sources to be analyzed, must be declared in the file sonar-project.properties in the base directory:

sonar.organization=<replace with your SonarCloud organization key>
sonar.projectKey=<replace with the key generated when setting up the project on SonarCloud>

# relative paths to source directories. More details and properties are described
# in https://sonarcloud.io/documentation/project-administration/narrowing-the-focus/
sonar.sources=.

The workflow, usually declared in .github/workflows/build.yml, looks like:

on:
  # Trigger analysis when pushing in master or pull requests, and when creating
  # a pull request.
  push:
    branches:
      - master
  pull_request:
      types: [opened, synchronize, reopened]
name: Main Workflow
jobs:
  sonarcloud:
    runs-on: ubuntu-latest
    env:
      BUILD_WRAPPER_OUT_DIR: build_wrapper_output_directory # Directory where build-wrapper output will be placed
    steps:
    - uses: actions/checkout@v3
      with:
        # Disabling shallow clone is recommended for improving relevancy of reporting
        fetch-depth: 0
    - name:  Install sonar-scanner and build-wrapper
      uses: sonarsource/sonarcloud-github-c-cpp@v1
    - name: Run build-wrapper
      run: |
      #here goes your compilation wrapped with build-wrapper; See https://docs.sonarcloud.io/advanced-setup/languages/c-c-objective-c/#analysis-steps-using-build-wrapper for more information
      # build-preparation steps
      # build-wrapper-linux-x86-64 --out-dir ${{ env.BUILD_WRAPPER_OUT_DIR }} build-command
    - name: Run sonar-scanner
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
      run: sonar-scanner --define sonar.cfamily.build-wrapper-output="${{ env.BUILD_WRAPPER_OUT_DIR }}" #Consult https://docs.sonarcloud.io/advanced-setup/ci-based-analysis/sonarscanner-cli/ for more information and options

You can change the build-wrapper and sonar-scanner installation path by using the optional input installation-path like this:

uses: sonarsource/sonarcloud-github-c-cpp@v1
with:
  installation-path: my/custom/directory/path

Also, the absolute paths to the installed build-wrapper and sonar-scanner binaries are returned as outputs from the action.

Moreover, by default the action will cache sonar-scanner installation. However, you can disable caching by using the optional input: cache-binaries like this:

uses: sonarsource/sonarcloud-github-c-cpp@v1
with:
  cache-binaries: false

See also example configurations

Secrets

Following secrets are required for successful invocation of sonar-scanner:

• SONAR_TOKEN – Required this is the token used to authenticate access to SonarCloud. You can generate a token on your Security page in SonarCloud. You can set the SONAR_TOKEN environment variable in the "Secrets" settings page of your repository.
• GITHUB_TOKEN – Provided by Github (see Authenticating with the GITHUB_TOKEN).

Example of pull request analysis

Do not use this GitHub action if you are in the following situations

• You want to analyze code written in a language other than C or C++. Use SonarCloud GitHub Action instead
• You want to run the action on a 32-bits system - build wrappers support only 64-bits OS

Additional information

This action installs coreutils if run on macOS

Have question or feedback?

To provide feedback (requesting a feature or reporting a bug) please post on the SonarSource Community Forum with the tag sonarcloud.

License

The action file and associated scripts and documentation in this project are released under the LGPLv3 License.