I created the following editorconfig file: Also I have created a new console program that contains my analyzer. And that’s exactly what are we going to build right now, we are going to use a new editorconfig attribute that allows us to choose which behaviour we want to enforce. Create as many custom rules … In the Preview Changes dialog, select Apply. is used  Microsoft recommended code quality rules and .NET API usage rules implemented as analyzers using the .NET Compiler Platform (Roslyn). You can do much of the customization of analyzer diagnostics from Solution Explorer. here: https://docs.microsoft.com/en-us/dotnet/api/microsoft.codeanalysis.diagnostics.analyzerconfigoptionsprovider?view=roslyn-dotnet. In Solution Explorer, double click the file, right-click References > Analyzers node, and select Open Active Rule Set. All the remaining rules with the "Performance" category will have severity "warning". Custom builds require replaying the entire set of commands, not just compiler commands. If you don't already have an EditorConfig file for your project, add one. (Visual Studio 2019 version 16.5 and later). Viewed 17k times. Corresponds to the default severity of the rule. However an important note for those familiar with FxCop based Code Analysis rule sets is that all Roslyn analyser rules are enabled by default (in FxCop you had to add the rules explicitly). Bryan Leave a comment. Visual Studio also provides a convenient way to configure a rule's severity from the error list context menu. Screenshot of Visual Studio editing a .ruleset file, disabling StyleCop rules. Right-click on the rule and select Set Rule Set Severity and in the fly-out menu, select one of the severity options. 11 October 2020. Double-click the ruleset file in Solution Explorer. If your project targets.NET 5 or later, code analysis is enabled by default. If your project already uses a specific ruleset file as its CodeAnalysisRuleSet, you can convert it to an equivalent EditorConfig file from Ruleset Editor within Visual Studio. This rule can be configure via editorconfig so you can define your preferred coding style. Non-visible to user. Open the the active rule set file in one of the following ways. I'll show how to create a code analyzer that targets .NET Standard using the new Visual Studio 2017 (15.5) templates, and show how you can debug and test your analyzer using Visual Studio. Roslyn analyzers and ruleset files Use Roslyn analyzers and ruleset files in Unity projects to inspect your code for style, quality, and other issues. First of all I have built a roslyn analyzer that reports an error if a csharp file contains more than one namespace. In the context menu, choose one of the severity options. For analyzers installed using the .NET SDK, you may need to Enable the analyzers. Microsoft created a set of analyzers called Microsoft.CodeAnalysis.FxCopAnalyzers that contains the most important "FxCop" rules from static code analysis, converted to Roslyn analyzers. You can view the properties of a diagnostic, including its description and default severity, in the Properties window. (period). This article covers setting analyzer severities and suppressing analyzer violations. [MOVED TO GITHUB] SonarC# SONARCS-456; Support custom Roslyn rules (diagnostics) This rule can be configure via editorconfig so you can define your preferred coding style. Select Suppress CAXXXX > in Source/in Suppression File. Unit Testing Roslyn Analyzer/Code Fix. For code styles, you can also enforce code styles on build by setting an MSBuild property. Your code fix contains the code that fixes the violation. Then, select the diagnostics you want to suppress and proceed as described previously. Since the build diagnostics can be stale, for example, if you've edited the code to fix the violation but haven't rebuilt, you cannot suppress these diagnostics from the Error List. .NET compiler platform (Roslyn) analyzers inspect your C# or Visual Basic code for code quality and style issues. Your desired rules are under 'StyleCop analyzer rules' You can speed up search by typing SX into filter field. In the Solution Explorer, expand Dependencies > Analyzers. You should see list of rules grouped by rule family like 'StyleCop analyzer rules', 'Microsoft.CodeAnalysis.CSharp.Features' etc. Diagnostics from live analysis, or IntelliSense, are always up-to-date with current sources and can be suppressed from the Error List. I’m aware that maybe it’s not entirely clear what I’m trying to achieve in this post so let me show you a very quick example. Asked 3 years, 8 months ago. On the Code Analysis property page for the project, select Open . After a violation occurs, right-click the diagnostic entry in the error list. An analyzer can add errors, warnings, or squiggles directly in the editor. However, editorconfig files offer additional ways to configure rules too: In this post I don’t pretend to write a deep dive about how a roslyn analyzers works or what’s an editorconfig file. Ask Question. Code Fixes can speed up your work process immensely by providing an automatic way to fix diagnostics, thus they are a must for most Analyzers. Roslyn Analyzers are a great way to enforce your own custom code standards and to make your developer life easier. To see online documentation for a diagnostic, right-click the diagnostic and select View Help. The verbosity of the build output does not affect whether rule violations are shown. IDE analyzers support configuration via .editorconfig for available options and semantics. Select the Save button to generate the EditorConfig file. EditorConfig files allow you to configure both analyzer rule severities and analyzer options, including Visual Studio IDE code style options. By using the root of your repo or solution folder, you make sure that the severity settings from this file are automatically applied to the entire repo or solution, respectively. To see analyzer violations at the command line when you build your project using msbuild, run a command like this: The following image shows the command-line build output from building a project that contains an analyzer rule violation: In a .NET Core project, if you add a reference to a project that has NuGet analyzers, those analyzers are automatically added to the dependent project too. As I said previously with rule IDE0065 you can enforce if a “using” statement should be inside or outside a namespace with the following editorconfig attribute: So if you want to enforce that all your “usings” are always placed inside a namespace you can use the “inside_namespace” value and viceversa. If you’ve used the default template to create your analyzer project then you don’t need to worry because it is already configured to produce a nuget package upon building. You can implement different code styles on you analyzer and allow the end-user to decide via editorconfig which code style they want to enforce. In the Action column, select the value to open a drop-down list, and choose the desired severity from the list. The API context.Options.AnalyzerConfigOptionsProvider.GetOptions, it’s a new Roslyn API that allows us to get the configuration from the editorconfig file. You can change the severity of a rule from Solution Explorer or in a rule set file. What is FxCop Analyzer. If you suppress In Source, the Preview Changes dialog opens and shows a preview of the C# #pragma warning or Visual Basic #Disable warning directive that's added to the source code. Configuring Roslyn analyser rules for the whole solution. The Roslyn rule IDE0065 is an analyzer built into Visual Studio, specifically it analyzes if a “using” statement should be inside or outside a namespace based on a configuration attribute. Set rule severity for a category of analyzer rules: Set rule severity for all analyzer rules: Severity entry for an individual rule by ID takes precedence over severity entry for a category. Offending code is underlined with a gray squiggle and marked by a small gray box in the scroll bar. If your project uses a ruleset file instead of an EditorConfig file, the severity entry is added to the ruleset file. dotnet_analyzer_diagnostic.category-.severity = , dotnet_analyzer_diagnostic.severity = . These analyzers check your code for security, performance, and design issues, among others. These analyzers check your code for security, performance, and design issues, among others. Roslyn analyzers allow you to use the data from Roslyn to inspect your code to detect issues. Additionally, the MSBuild property CodeAnalysisRuleSet gets updated in the project file so that it no longer references the original ruleset file. The preferable way to use the analyzers is to add the nuget package StyleCop.Analyzersto the project where you want to enforce StyleCop rules. You can find a lot of information about creating your own analyzer with Roslyn on Google (or whatever the search engine you are using), here are some links you could use: Visual Studio adds an entry to the EditorConfig file to configure the rule to the requested level. Those can be used, to improve your code quality. (Visual Studio 2019 version 16.3 and later). Place the cursor in the line of code with the violation and press Ctrl+Period (.) Given a roslyn analyzer how we can add support for different code styles using the editorconfig file. Roslyn Analyzer Rulesets and stylecop.json support in Rider 2018.2. For instance, you can create an analyzer to help users following the best practices for your library, such as for the logging library of ASP.NET Core or FakeItEasy. Visual Studio adds an entry to the EditorConfig file to configure the rule to the requested level, as shown in the preview box. Entries to configure multiple analyzer rules at once only apply to rules that are enabled by default. To specify a non-default rule set for a .NET Core or .NET Standard project, manually add the CodeAnalysisRuleSet property to the project file. The severity of individual rules may be configured using rule set filesin Visual Studio 2015 or newer. Beware that you NEED to follow this pattern: dotnet_diagnostic... The icons next to each diagnostic in Solution Explorer correspond to the icons you see in the rule set when you open it in the editor: Starting in Visual Studio 2019 version 16.5, ruleset files are deprecated in favor of the EditorConfig file for analyzer configuration for managed code. More info. It is surprising how easy it is to create Analyzers even for complicated rules. These have worked well for us over the years. For example, to set the severity for CA1822 to error for C# files, the entry looks as follows: For IDE code-style analyzers, you can also configure them in an EditorConfig file using a different syntax, for example, dotnet_style_qualification_for_field = false:suggestion. Check your rules, try to build project and you should see warnings/errors where this. Create a NuGet package for your analyzer¶. Visual Studio provides a convenient way to configure a rule's severity from the Quick Actions light bulb menu. Code fixes are shown in the light bulb icon menu along with other types of Quick Actions. In this example, CA1822 will have an effective severity of "error". However, these violations are not useful on generated code files, such as designer generated code files, temporary source files generated by build system, etc. The.NET Compiler Platform SDK provides the tools you need to create custom warnings that target C# or Visual Basic code. The Ruleset file should open in the Ruleset Editor. You should see a clickable infobar at top of the ruleset editor. Analyzer violations also show up in the code editor as squiggles under the offending code. Roslyn analyzers inspect your code for style, quality, maintainability, design and other issues. Roslyn Analyzers are integrated with the compiler. For example, a file name ending with .designer.cs or .generated.cs is considered generated code. 2. This custom rule set also becomes the active rule set for your project. The following table shows the different severity options: If rule violations are found by an analyzer, they're reported in the code editor (as a squiggle under the offending code) and in the Error List window. The generated plugin works with the C# plugin (v4.5 or higher) and the SonarQube Scanner for MSBuild (v2.0 or higher) to handle executing the analyzer and uploading any issues.See this blog postfor more information.
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