Linter Visual Studio Code

Language Support for Java(TM) by Red Hat also provides formatting settings. You can export an Eclipse formatter file and then use it for your project in VS Code.

Set PyLint command-line options. The command-line options section of the PyLint documentation describes how to control PyLint's behavior through a.pylintrc configuration file. Such a file can be placed in the root of a Python project in Visual Studio or elsewhere depending on how widely you want those settings applied (see the command-line options for details). The SonarLint extension lets you detect bugs and vulnerabilities as you write code in VS Code. Java is one of the languages supported, and the extension will run in the background and highlight source code that poses a quality or security concern. Code Analysis on the fly. I am a really newcomer for both ruby and visual studio code. I have installed ruby and ruby-debug-ide, and I can run or debug the ruby in vscode already. Now I would like to install the ruby-linter.

In addition, there are also the Checkstyle for Java and SonarLint extensions, which provide features for live linting and code analysis.

Checkstyle

With the Checkstyle for Java extension, you can use either existing checkstyle configurations (Google's or Sun's Check) or your own customized files for your project. When editing a Java file, the extension will check the file format and provide Quick Fixes if possible on the fly.

Set Checkstyle configuration file.

The Checkstyle for Java extension supports live linting.

And batch check.

The Problems panel will open when you click the Checkstyle status icon in the Status bar.

Set Checkstyle configuration file

To set the configuration file, right-click the .xml file and select Set the Checkstyle Configuration File.
You can also trigger the command Checkstyle: Set Checkstyle Configuration File to choose the configuration file in the File Explorer. The extension looks for a checkstyle.xml file in your workspace to make Checkstyle configuration easier. You will also see the two built-in configurations:
- Google's Check
- Sun's Check
Command Checkstyle: Set the Checkstyle Configuration detects potential Checkstyle configuration files and lists them. You can also provide a configuration file by directly writing a URL in the input box.

You can also set the Checkstyle version by using the command Checkstyle: Set the Checkstyle Version.

The command will:

List the latest Checkstyle version from the main repo.
List all the downloaded versions.
List all the supported versions.
Mark the currently used version with a check symbol.

In addition, you can also bring any 3rd-party modules for Checkstyle by configuring its path. For example, after using the configuration below, you can add <module name='SingleBreakOrContinueCheck'/> or <module name='com.github.sevntu.checkstyle.checks.naming.SingleBreakOrContinueCheck'/> to checkstyle.xml to leverage those checks.

Check the style and fix the violations

When editing a Java file, the extension will check the file format and provide Quick Fixes if possible. You can click the lightbulb button in the editor to show the available Quick Fixes.

For more details about Checkstyle for Java, visit its GitHub Repository.

SonarLint

The SonarLint extension lets you detect bugs and vulnerabilities as you write code in VS Code. Java is one of the languages supported, and the extension will run in the background and highlight source code that poses a quality or security concern.

Code Analysis on the fly

Issues are highlighted directly in the editor with hovers to provide detailed explanations.

Issues found in the opened file can also be reviewed through the Problems panel of VS Code. When applicable, secondary code locations are mentioned so you can understand where the issue originates from (for example, the code path that led to a bug).

Rule documentation and remediation guidance

For any issue detected, SonarLint provides full documentation about the rule that was violated, and the coding best practice it relates to. This lets you understand why an issue is raised, and most importantly how to best fix it.

Enabling more quality and security rules

By default, SonarLint provides a wide array of rules to detect bugs and vulnerabilities. More checks can be enabled through the SonarLint Rules view.

For more details about the SonarLint for VS Code extension, visit the SonarLint website.

Formatter

Currently, you need an Eclipse formatter file like Google Style.

Set the following property:

The property can point to a URL or a local file path.

If the formatter XML file contains more than one profile, you can set the profile name:

You can also define the formatting preferences in your project's .settings/org.eclipse.jdt.core.prefs. It will override the global formatting settings.

We are working on a solution to allow editing your formatting preferences from within VS Code. For now, the best way to edit them is to use Eclipse. See Formatter Settings for details.

Linting within the extension is supported on the following:

Pylint (this is the default linter used)

Paths

All samples provided here are for windows.
However Mac/Linux paths are also supported.

Note: You could enable all of the above linters if necessary. Or just one or two of them.
This can be achieved by enabling/disabling individual linters.

Lint as you type

Linting as you type can be enabled by turning on the ‘auto save’ feature in Visual Studio Code…
Follow the instructions here to turn on auto save.

Enable/Disable Linting

By default linting is enabled and uses pylint.
If you wish to turn this off, you could do so either in the User Settings or the Workspace Settings file.
Enabling/disabling could be done by configuring the following property in either one of (User or Workspace settings file) as follows:

The extension will run the linter when ever a file is saved.
This can easily be turned off, once again either within the User or Workspace Settings files with the following configuration change:

Maximum number of messages

The default maximum number of messages displayed in Visual Studio Code is limited to 100.
If this is to be altered, then change the following configuration settings either in the User or Workspace settings file:

Pylint

As mentioned previously, this is the default linter used by the extension.

Installing PylintFor this to work properly ensure pylint is installed locally.
You can easily install pylint as follows:
pip install pylint

Enabling/Disabling pylintIf the pylint linter is not to be used by the extension, then disable it as follows either in the User or Workspace settings file:

Custom PathThis is generally unnecessary. As the Extension will resolve the path to the formatter based on Python executable being used or configured in python.pythonPath of settings.json. If this cannot be found, then the formatter will be resolved based on the current environment Path settings.

If this is not the case or you wish to use another version of pylint, all you need to do is configure the path as follows either in the User or Workspace settings file:

Pylint Category MappingMessages generated by pylint fall into the following categories:

convention, refactor, warning, error, fatal
Visual Studio Code supports the following categories in linting:
Hint, Error, Information, WarningBy default the extension maps pylint “convention” to “Hint”, and so on.
These mappings can be altered either in the User or Workspace settings files as follows:

Custom ConfigurationYou can customize the linter by providing a configuration file for pylint and placing it in the necessary location.
For instance you could place a pylintrc or .pylintrc file in the workspace folder.For further details please refer Pylint Command Line Options

Pylint Plugins or custom arguments to PyLintCustom plugins such as pylint plugin for Django can be easily used by modifying the User or Workspace settings as follows:

Pep8

As mentioned previously, usage of this linter is turned off by the extension.

Installing Pep8For this to work properly ensure Pep8 is installed locally.
You can easily install pep8 as follows:
pip install pep8

Linter Pylint Vs Code

Enabling/Disabling pep8If the pep8 linter is to be used by the extension, then enable it as follows either in the User or Workspace settings file:

If this is not the case or you wish to use another version of pep8, all you need to do is configure the path as follows either in the User or Workspace settings file:

Vs Code Linter

Custom ConfigurationThe options are read from the [pep8] section of the tox.ini file or the setup.cfg file located in any parent folder of the path(s) being processed.
For further details refer the following Options.

Flake8

As mentioned previously, usage of this linter is turned off by the extension.

Installing Flake8For this to work properly ensure Flake8 is installed locally.
You can easily install flake8 as follows:
pip install flake8

Enabling/Disabling flake8If the flake8 linter is to be used by the extension, then enable it as follows either in the User or Workspace settings file:

If this is not the case or you wish to use another version of pep8, all you need to do is configure the path as follows either in the User or Workspace settings file:

Custom ConfigurationThe user settings are read from the ~/.config/flake8 file (or the ~/.flake8 file on Windows).
At the project level, a tox.ini file or a setup.cfg file is read if present. Only the first file is considered. If this file does not have a [flake8] section, no project specific configuration is loaded.
For further details refer Configuration.

mypy

As mentioned previously, usage of this linter is turned off by the extension.

Installing mypyFor this to work properly ensure mypy is installed locally.
You can easily install mypy as follows:
pip3 install mypy-lang

Enabling/Disabling mypyIf the mypy linter is to be used by the extension, then enable it as follows either in the User or Workspace settings file:

Visual Studio C# Linter

If this is not the case or you wish to use another version of mypy, all you need to do is configure the path as follows either in the User or Workspace settings file:

Custom ConfigurationCustom command line arguments can be passed into mypy just as with the other linters using the setting:

pylama

As mentioned previously, usage of this linter is turned off by the extension.

Installing mypyFor this to work properly ensure mypy is installed locally.
You can easily install pylama as follows:
pip install pylama

Enabling/Disabling pylamaIf the pylama linter is to be used by the extension, then enable it as follows either in the User or Workspace settings file:

Linter Visual Studio Code

C# Linter Visual Studio Code

If this is not the case or you wish to use another version of mypy, all you need to do is configure the path as follows either in the User or Workspace settings file:

Python Linter Vscode

Custom ConfigurationCustom command line arguments can be passed into pylama just as with the other linters using the setting: