Introducing new flag --return-success-on-findings.

ChangeLog.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- [CLI] Suppress error code from Roslynator when it detects issues in code but runs successfully ([PR](https://github.com/dotnet/roslynator/pull/1756) by @mdrybak)
+
 ### Fixed
 
 - Fix analyzer [RCS1074](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1074) ([PR](https://github.com/dotnet/roslynator/pull/1768) by @cbersch)

src/CommandLine/Commands/AnalyzeCommand.cs

@@ -81,11 +81,12 @@ public override async Task<AnalyzeCommandResult> ExecuteAsync(ProjectOrSolution
             results = await codeAnalyzer.AnalyzeSolutionAsync(solution, f => IsMatch(f), cancellationToken);
         }
 
-        return new AnalyzeCommandResult(
-            (results.Any(f => f.Diagnostics.Length > 0 || f.CompilerDiagnostics.Length > 0)) ? CommandStatus.NotSuccess : CommandStatus.Success,
-            results);
+        return new AnalyzeCommandResult(GetCommandStatus(Options, results), results);
     }
 
+    private static CommandStatus GetCommandStatus(AnalyzeCommandLineOptions options, ImmutableArray<ProjectAnalysisResult> results)
+        => (options.ReturnSuccessOnDiagnostics || !results.Any(f => f.Diagnostics.Length > 0 || f.CompilerDiagnostics.Length > 0)) ? CommandStatus.Success : CommandStatus.NotSuccess;
+
     protected override void ProcessResults(IList<AnalyzeCommandResult> results)
     {
         IEnumerable<ProjectAnalysisResult> analysisResults = results.SelectMany(f => f.AnalysisResults);

src/CommandLine/Options/AnalyzeCommandLineOptions.cs

@@ -39,6 +39,11 @@ public class AnalyzeCommandLineOptions : AbstractAnalyzeCommandLineOptions
         HelpText = "Indicates whether suppressed diagnostics should be reported.")]
     public bool ReportSuppressedDiagnostics { get; set; }
 
+    [Option(
+        longName: "return-success-on-diagnostics",
+        HelpText = "Indicates whether to return exit code 0 on runs when diagnostics are reported.")]
+    public bool ReturnSuccessOnDiagnostics { get; set; }
+
     internal bool ValidateOutputFormat()
     {
         return ParseHelpers.TryParseOutputFormat(OutputFormat);