Nowadays, code quality is very important. We have several tools and components in the market that help us to identify possible problems and one of them is SonarQube, a free tool in the Community version. In other versions, the price varies according to the Developer features/Enterprise/DataCenter.

SonarQube performs various analyzes, bugs, code smells, test coverage, vulnerabilities, and duplicate blocks. Thus, identifying problems, such as a WebClient that has neglected to give a dispose.

Let’s now create an environment and configure SonarQube with Docker + SonarQube (7.5) + .NET Core Project.

You must have the Java SDK installed!

Open the CMD or the terminal of your choice and execute the commands to download the Docker-Compose file:

curl -LO https://raw.githubusercontent.com/thiagoloureiro/SonarQube-Docker-Netcore/master/docker-compose.yml

Next, we will execute the compose to upload the image:

docker-compose up

Open your browser at http://localhost:9000

Login: admin

Password: bitnami

An interface will be displayed to enter information about the project:

After clicking Generate, the following screen will appear:

At this point, select the language of your project and enter a key that will be used as Token:

After you click Done, the following information is displayed:

Write down the key marked in the image above and click "Finish this tutorial" in the lower right corner.

Once your project is done, your environment is ready to perform the first analysis:

Open CMD again and create a new solution and project, change the name of the solution and project to the name generated by the new sln/console command.

dotnet new sln

dotnet new console

dotnet sln awesomeproject.sln add awesomeproject.csproj

Now let’s go to SonarQube, for .NET Core we have a native tool, to install execute the following command:

dotnet tool install --global dotnet-sonarscanner 

Then…

dotnet sonarscanner begin /d:sonar.login=admin /d:sonar.password=bitnami /k:”AwesomeKey”

The Login can be replaced by the Key generated above, being only:

dotnet sonarscanner begin /d:sonar.login=keygerada /k:”AwesomeKey”

Now let’s run a build for the solution:

dotnet build

And to finish the process, we will execute the command to terminate the analysis:

dotnet sonarscanner end /d:sonar.login=admin /d:sonar.password=bitnami

Or

dotnet sonarscanner end /d:sonar.login=generatedkey

Once the process is finished, we can go back to the dashboard(http://localhost:9000) and we will have some information:

Now, you only have to configure your project and execute the commands automatically when you perform a build on a specific branch.

Thanks, and let me know your thoughts or questions in the comments.