Update markdown linter to utilize settings observers and DI.

New_Extensibility_Model/Samples/MarkdownLinter/.vsextension/string-resources.json

@@ -1,4 +1,8 @@
 {
   "MarkdownLinter.RunLinterOnCurrentFileCommand.DisplayName": "Run Linter on open file",
-  "MarkdownLinter.RunLinterOnSolutionCommand.DisplayName": "Run Linter on solution"
+  "MarkdownLinter.RunLinterOnSolutionCommand.DisplayName": "Run Linter on solution",
+  "MarkdownLinter.Settings.Category.DisplayName": "Markdown Linter",
+  "MarkdownLinter.Settings.Category.Description": "Markdown Linter Settings",
+  "MarkdownLinter.Settings.DisabledRules.DisplayName": "Disabled rules",
+  "MarkdownLinter.Settings.DisabledRules.Description": "List of disabled rules to pass to markdown-cli"
 }

New_Extensibility_Model/Samples/MarkdownLinter/LinterUtilities.cs

@@ -11,6 +11,7 @@ namespace MarkdownLinter;
 using System.Globalization;
 using System.IO;
 using System.Text.RegularExpressions;
+using System.Threading;
 using System.Threading.Tasks;
 using Microsoft;
 using Microsoft.VisualStudio.Extensibility.Editor;
@@ -19,27 +20,44 @@ namespace MarkdownLinter;
 using Microsoft.VisualStudio.RpcContracts.DiagnosticManagement;
 using Microsoft.VisualStudio.Threading;
 
+#pragma warning disable VSEXTPREVIEW_SETTINGS // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.
+
 /// <summary>
 /// Helper class for running linter on a string or file.
 /// </summary>
-internal static class LinterUtilities
+internal class LinterUtilities
 {
     private static readonly Regex LinterOutputRegex = new(@"(?<File>[^:]+):(?<Line>\d*)(:(?<Column>\d*))? (?<Error>.*)/(?<Description>.*)", RegexOptions.Compiled);
 
+    private readonly Settings.MarkdownLinterCategoryObserver settingsObserver;
+
+    public LinterUtilities(Settings.MarkdownLinterCategoryObserver settingsObserver)
+    {
+        this.settingsObserver = settingsObserver;
+    }
+
     /// <summary>
     /// Runs markdown linter on a file uri and returns diagnostic entries.
     /// </summary>
     /// <param name="fileUri">File uri to run markdown linter on.</param>
+    /// <param name="cancellationToken">Cancellation token to monitor.</param>
     /// <returns>an enumeration of <see cref="DocumentDiagnostic"/> entries for warnings in the markdown file.</returns>
-    public static async Task<IEnumerable<DocumentDiagnostic>> RunLinterOnFileAsync(Uri fileUri)
+    public async Task<IEnumerable<DocumentDiagnostic>> RunLinterOnFileAsync(Uri fileUri, CancellationToken cancellationToken)
     {
         using var linter = new Process();
         var lineQueue = new AsyncQueue<string>();
 
+        var snapshot = await this.settingsObserver.GetSnapshotAsync(cancellationToken);
+        string disabledRules = snapshot.DisabledRules.ValueOrDefault(string.Empty);
+
+        string args = "/c \"npx markdownlint-cli" +
+            (disabledRules.Length > 0 ? $" --disable {disabledRules} --" : string.Empty) +
+            $" \"{fileUri.LocalPath}\"\"";
+
         linter.StartInfo = new ProcessStartInfo()
         {
-            FileName = "node.exe",
-            Arguments = $"\"{Environment.ExpandEnvironmentVariables("%APPDATA%\\npm\\node_modules\\markdownlint-cli\\markdownlint.js")}\" \"{fileUri.LocalPath}\"",
+            FileName = "cmd.exe",
+            Arguments = args,
             RedirectStandardError = true,
             UseShellExecute = false,
             CreateNoWindow = true,
@@ -76,18 +94,25 @@ public static async Task<IEnumerable<DocumentDiagnostic>> RunLinterOnFileAsync(U
     /// Runs markdown linter on a given text document and returns diagnostic entries.
     /// </summary>
     /// <param name="textDocument">Document to run markdown linter on.</param>
+    /// <param name="cancellationToken">Cancellation token to monitor.</param>
     /// <returns>an enumeration of <see cref="DocumentDiagnostic"/> entries for warnings in the markdown file.</returns>
-    public static async Task<IEnumerable<DocumentDiagnostic>> RunLinterOnDocumentAsync(ITextDocumentSnapshot textDocument)
+    public async Task<IEnumerable<DocumentDiagnostic>> RunLinterOnDocumentAsync(ITextDocumentSnapshot textDocument, CancellationToken cancellationToken)
     {
         using var linter = new Process();
         var lineQueue = new AsyncQueue<string>();
 
         var content = textDocument.Text.CopyToString();
 
+        var snapshot = await this.settingsObserver.GetSnapshotAsync(cancellationToken);
+        string disabledRules = snapshot.DisabledRules.ValueOrDefault(string.Empty);
+
+        string args = "/k \"npx markdownlint-cli --stdin" +
+            (disabledRules.Length > 0 ? $" --disable {disabledRules}" : string.Empty) + "\"";
+
         linter.StartInfo = new ProcessStartInfo()
         {
             FileName = "cmd.exe",
-            Arguments = $"/k \"{Environment.ExpandEnvironmentVariables("%APPDATA%\\npm\\markdownlint.cmd")}\" -s",
+            Arguments = args,
             RedirectStandardError = true,
             RedirectStandardInput = true,
             UseShellExecute = false,
@@ -125,16 +150,6 @@ public static async Task<IEnumerable<DocumentDiagnostic>> RunLinterOnDocumentAsy
         return CreateDocumentDiagnosticsForOpenDocument(textDocument, markdownDiagnostics);
     }
 
-    /// <summary>
-    /// Checks if the given path is a valid markdown file.
-    /// </summary>
-    /// <param name="localPath">Local file path to verify.</param>
-    /// <returns>true if file is a markdown file, false otherwise.</returns>
-    public static bool IsValidMarkdownFile(string localPath)
-    {
-        return localPath is not null && Path.GetExtension(localPath).Equals(".md", StringComparison.OrdinalIgnoreCase);
-    }
-
     private static IEnumerable<DocumentDiagnostic> CreateDocumentDiagnosticsForOpenDocument(ITextDocumentSnapshot document, IEnumerable<MarkdownDiagnosticInfo> diagnostics)
     {
         foreach (var diagnostic in diagnostics)

New_Extensibility_Model/Samples/MarkdownLinter/MarkdownDiagnosticsService.cs

@@ -7,6 +7,7 @@ namespace MarkdownLinter;
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Windows.Media.Animation;
 using Microsoft;
 using Microsoft.VisualStudio.Extensibility;
 using Microsoft.VisualStudio.Extensibility.Documents;
@@ -28,17 +29,20 @@ internal class MarkdownDiagnosticsService : DisposableObject
 #pragma warning restore CA2213 // Disposable fields should be disposed
     private readonly Dictionary<Uri, CancellationTokenSource> documentCancellationTokens;
     private readonly Task initializationTask;
+    private readonly LinterUtilities linterUtilities;
     private OutputChannel? outputChannel;
     private DiagnosticsReporter? diagnosticsReporter;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="MarkdownDiagnosticsService"/> class.
     /// </summary>
     /// <param name="extensibility">Extensibility object.</param>
-    public MarkdownDiagnosticsService(VisualStudioExtensibility extensibility)
+    /// <param name="linterUtilities">Service for running the linter on markdown files.</param>
+    public MarkdownDiagnosticsService(VisualStudioExtensibility extensibility, LinterUtilities linterUtilities)
     {
         this.extensibility = Requires.NotNull(extensibility, nameof(extensibility));
         this.documentCancellationTokens = new Dictionary<Uri, CancellationTokenSource>();
+        this.linterUtilities = Requires.NotNull(linterUtilities, nameof(linterUtilities));
         this.initializationTask = Task.Run(this.InitializeAsync);
     }
 
@@ -71,7 +75,7 @@ public async Task ProcessFileAsync(Uri documentUri, CancellationToken cancellati
 
         try
         {
-            var diagnostics = await LinterUtilities.RunLinterOnFileAsync(documentUri);
+            var diagnostics = await this.linterUtilities.RunLinterOnFileAsync(documentUri, cancellationToken);
 
             await this.diagnosticsReporter!.ClearDiagnosticsAsync(documentUri, cancellationToken);
             await this.diagnosticsReporter!.ReportDiagnosticsAsync(diagnostics, cancellationToken);
@@ -151,7 +155,7 @@ private async Task ProcessDocumentAsync(ITextDocumentSnapshot documentSnapshot,
 
         try
         {
-            var diagnostics = await LinterUtilities.RunLinterOnDocumentAsync(documentSnapshot);
+            var diagnostics = await this.linterUtilities.RunLinterOnDocumentAsync(documentSnapshot, cancellationToken);
 
             await this.diagnosticsReporter!.ClearDiagnosticsAsync(documentSnapshot, cancellationToken);
             await this.diagnosticsReporter!.ReportDiagnosticsAsync(diagnostics, cancellationToken);

New_Extensibility_Model/Samples/MarkdownLinter/MarkdownLinterExtension.cs

@@ -38,6 +38,12 @@ protected override void InitializeServices(IServiceCollection serviceCollection)
     {
         base.InitializeServices(serviceCollection);
 
+        // Add the settings observer created by MarkdownLinterSettingDefinitions to use in LinterUtilies.
+        serviceCollection.AddSettingsObservers();
+
+        // Add linter utilities as a singleton, it depends on settings observer.
+        serviceCollection.AddSingleton<LinterUtilities>();
+
         // As of now, any instance that ingests VisualStudioExtensibility is required to be added as a scoped
         // service.
         serviceCollection.AddScoped<MarkdownDiagnosticsService>();

New_Extensibility_Model/Samples/MarkdownLinter/MarkdownLinterSettingDefinitions.cs

@@ -0,0 +1,25 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace MarkdownLinter;
+
+using Microsoft.VisualStudio.Extensibility;
+using Microsoft.VisualStudio.Extensibility.Settings;
+
+#pragma warning disable VSEXTPREVIEW_SETTINGS // The settings API is currently in preview and marked as experimental
+
+internal static class MarkdownLinterSettingDefinitions
+{
+    [VisualStudioContribution]
+    internal static SettingCategory MarkdownLinterCategory { get; } = new("markdownLinter", "%MarkdownLinter.Settings.Category.DisplayName%")
+    {
+        Description = "%MarkdownLinter.Settings.Category.Description%",
+        GenerateObserverClass = true,
+    };
+
+    [VisualStudioContribution]
+    internal static Setting.String DisabledRules { get; } = new("disabledRules", "%MarkdownLinter.Settings.DisabledRules.DisplayName%", MarkdownLinterCategory, defaultValue: string.Empty)
+    {
+        Description = "%MarkdownLinter.Settings.DisabledRules.Description%",
+    };
+}