SonarLint for Visual Studio Code

SonarLint by Sonar is a free IDE extension that empowers you to fix coding issues before they exist. More than a linter, SonarLint detects and highlights issues that can lead to bugs, vulnerabilities, and code smells as you create your code. It offers clear remediation guidance and educational help, so you can fix issues before the code is committed. Out of the box, SonarLint in VS Code supports analysis of JS/TS, Python, PHP, Java, C, C++, C#, Go, and IaC code locally in your IDE.

By default, SonarLint for VSCode analyzes files open in the IDE. When paired with SonarQube or SonarCloud in Connected Mode, SonarLint forms a powerful end-to-end code quality platform to enrich the CI/CD pipeline, ensuring any code edits or additions across the whole project are clean. In Connected Mode, your team can share common language rulesets, project analysis settings and more.

Check the SonarLint for VS Code documentation for the most up-to-date requirements, installation instructions, and feature details.

Sonar's Clean Code solutions help developers deliver high-quality, efficient code standards that benefit the entire team or organization.

How it works

Simply open any source file, start coding, and you will start seeing issues reported by SonarLint. Issues are highlighted in your code and also listed in the 'Problems' panel.

You can access the detailed rule description directly from your editor, using the provided contextual menu.

Watch the SonarLint for VSCode Overview video to explore SonarLint features.

Static Analysis Rules

Out of the box, SonarLint automatically checks your code against the following rules:

The full list of supported languages and rules is available in our docs.

Requirements

The SonarLint language server needs a Java Runtime (JRE) 17+.

On the following platforms, SonarLint comes with its own Java runtime:

Windows x86-64
Linux x86-64
macOS x86-64 (Intel Macs) and arm-64 (Apple Silicon Macs)

On other platforms and if a Java runtime is already installed on your computer, SonarLint should automatically find and use it. Here is how SonarLint will search for an installed JRE (in priority order):

the sonarlint.ls.javaHome variable in VS Code settings if set. For instance:
```
{
  "sonarlint.ls.javaHome": "C:\\Program Files\\Java\\jdk-17"
}
```
embedded JRE for platform-specific installations
the value of the JDK_HOME environment variable if set
the value of the JAVA_HOME environment variable if set
on Windows the registry is queried
if a JRE is still not found then:
1. the PATH is scanned for javac
2. on macOS, the parent directory of javac is checked for a java_home binary. If that binary exists then it is executed and the result is used
3. the grandparent directory of javac is used. This is similar to $(dirname $(dirname $(readlink $(which javac))))

SonarLint then uses the first JRE found in these steps to check its version.

If a suitable JRE cannot be found at those places, SonarLint will ask for your permission to download and manage its own version.

JS/TS analysis specific requirements

To analyze JavaScript and TypeScript code, SonarLint requires a Node.js executable. The minimal supported version is 16 for standalone analysis or Connected Mode with SonarCloud. For Connected Mode with SonarQube, it depends on the version of the JS/TS analyzer on your SonarQube server. SonarLint will attempt to automatically locate Node, or you can force the location using:

{
  "sonarlint.pathToNodeExecutable": "/home/yourname/.nvm/versions/node/v18.15.0/bin/node"
}

Analysis of TypeScript in Connected Mode with SonarQube requires the server to use version 8.1 or above.

C and C++ analysis specific requirements

To analyze C and C++ code, SonarLint requires compile commands json file:

{
  "sonarlint.pathToCompileCommands": "/home/yourname/repos/proj/compile_commands.json"
}

Note: if you are using Microsoft compiler, the environment should be ready to build the code. For example, by launching VS Code from your Visual Studio Command Prompt

Java analysis specific requirements

To enable the support for Java analysis, you need the Language support for Java VSCode extension (version 0.56.0 or higher). You also need to be in standard mode.

Apex analysis specific requirements

The support for Apex analysis is only available together with SonarQube Enterprise Edition or SonarCloud (see Connected Mode below). You also need the Salesforce Extension Pack VSCode extension.

PL/SQL analysis specific requirements

The support for PL/SQL analysis is only available together with SonarQube Developer Edition or SonarCloud (see Connected Mode below). You also need the Oracle Developer Tools for VS Code extension.

COBOL analysis specific requirements

The support for COBOL analysis is only available together with SonarQube Enterprise Edition or SonarCloud (see Connected Mode below). You also need an extension that declares the COBOL language; SonarLint has been tested with the IBM Z Open Editor and Micro Focus COBOL extensions.

Jupyter notebooks

SonarLint for VS Code supports analysis of Python code inside Jupyter notebooks. See the documentation page for details.

Injection vulnerabilities specific requirements

Security vulnerabilities requiring taint engine analysis (taint vulnerabilities) are only available in Connected Mode because SonarLint pulls them from SonarQube or SonarCloud following a project analysis.

To browse injection vulnerabilities in SonarLint for VSCode, establish Connected Mode with your SonarQube Developer Edition (and above) or SonarCloud instance. Once a Project Binding is configured, SonarLint will synchronize with the SonarQube or SonarCloud server to report the detected injection vulnerabilities.

More information about security-related rules is available in the SonarQube or SonarCloud documentation.

Security Hotspots in SonarLint

Local detection of Security Hotspots is enabled if you are using Connected Mode with SonarQube 9.9 or above, or SonarCloud.

Please see the documentation for more details.

Secrets detection

Secrets are pieces of user-specific or system-level credentials that should be protected and accessible to legitimate users only. SonarLint detects exposed Secrets in your source code and language-agnostic config files. When running in Connected Mode, the SonarQube or SonarCloud Quality Profiles are applied to locally detected Secrets.

Connected Mode

You can connect SonarLint to SonarQube 9.9+ or SonarCloud by binding your VSCode workspace folder to your SonarQube/SonarCloud project(s), and benefit from the same rules and settings that are used to inspect your project on the server. SonarLint in VSCode then hides Accepted (formerly Won’t Fix) and False Positive issues in any file from a bound folder.

While in Connected Mode, SonarLint receives notifications from SonarQube/SonarCloud about your Quality Gate changes and new issues. Notifications can be enabled or disabled from the UI while creating or editing the connection settings.

When running in Connected Mode, and browsing a Security Hotspot, a button will be available offering to open the hotspot in SonarLint (with SonarLint already running in VSCode). Limitation: this feature relies on local communication between your web browser and SonarLint, and consequently is not available in some remote environments such as GitPod, or GitHub CodeSpaces.

Connected Mode will also unlock your analysis of these languages:

When configuring Connected Mode, follow the Connection Setup instructions.

Other settings

It is possible to specify extra analyzer properties that will be used for analysis. Example:

// In project/.vscode/settings.json
{
  "sonarlint.analyzerProperties": {
    "sonar.javascript.node.maxspace": "4096"
  }
}

Contributions

Have a need in SonarLint that’s not being met? Or not being met well? Ever wish you could talk directly to the Product Manager? Well now’s your chance! Congratulations, you are SonarLint’s Product Manager for a day. If you would like to see a new feature, please create a new thread in the Community Forum here, under "Product Manager for a Day".

Please read here about why we deprecated the "Suggest New Features" category on the Community Forum. The truth is that it's extremely difficult for someone outside SonarSource to comply with our roadmap and expectations. Therefore, we typically only accept minor cosmetic changes and typo fixes.

With that in mind, if you would like to submit a code contribution, please create a pull request for this repository. Please explain your motives to contribute: what problem you are trying to fix, what improvement you are trying to make.

Make sure that you follow our code style and all tests are passing.

Have Questions or Feedback?

For SonarLint support questions ("How do I?", "I got this error, why?", ...), please first read the FAQ and then head to the SonarSource forum. There are chances that a question similar to yours has already been answered.

Be aware that this forum is a community, so the standard pleasantries ("Hi", "Thanks", ...) are expected. And if you don't get an answer to your thread, you should sit on your hands for at least three days before bumping it. Operators are not standing by. :-)

Issue tracker (read-only): https://jira.sonarsource.com/browse/SLVSCODE

License

Licensed under the GNU Lesser General Public License, Version 3.0

Data and telemetry

This extension collects anonymous usage data and sends it to SonarSource to help improve SonarLint functionality. No source code or IP address is collected, and SonarSource does not share the data with anyone else. Collection of telemetry is controlled via the setting: sonarlint.disableTelemetry. Click here to see a sample of the data that are collected.

spiltcoffee/sonarlint-vscode