Support hot reload for cshtml files (#1657)

Author: Mpdreamz

Directory.Packages.props

@@ -2,6 +2,7 @@
   <PropertyGroup>
     <!-- Enable central package management, https://learn.microsoft.com/en-us/nuget/consume-packages/Central-Package-Management -->
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+    <MinVerSkip Condition="'$(Configuration)' == 'Debug'">true</MinVerSkip>
   </PropertyGroup>
   <ItemGroup>
     <GlobalPackageReference Include="MinVer" Version="6.0.0" PrivateAssets="All" />
@@ -42,7 +43,7 @@
     <PackageVersion Include="Markdig" Version="0.41.1" />
     <PackageVersion Include="NetEscapades.EnumGenerators" Version="1.0.0-beta12" PrivateAssets="all" ExcludeAssets="runtime" />
     <PackageVersion Include="Proc" Version="0.9.1" />
-    <PackageVersion Include="RazorSlices" Version="0.9.2" />
+    <PackageVersion Include="RazorSlices" Version="0.9.4" />
     <PackageVersion Include="Samboy063.Tomlet" Version="6.0.0" />
     <PackageVersion Include="Slugify.Core" Version="4.0.1" />
     <PackageVersion Include="SoftCircuits.IniFileParser" Version="2.7.0" />
@@ -70,4 +71,4 @@
     </PackageVersion>
     <PackageVersion Include="xunit.v3" Version="2.0.2" />
   </ItemGroup>
-</Project>
+</Project>

build/Targets.fs

@@ -34,7 +34,7 @@ let private version _ =
 
 let private format _ = exec { run "dotnet" "format" "--verbosity" "quiet" }
 
-let private watch _ = exec { run "dotnet" "watch" "--project" "src/tooling/docs-builder" "--no-hot-reload" "--" "serve" }
+let private watch _ = exec { run "dotnet" "watch" "--project" "src/tooling/docs-builder" "--configuration" "debug" "--" "serve" }
 
 let private lint _ =
     match exec {

src/Directory.Build.props

@@ -9,5 +9,6 @@
 
     <!-- TODO ENABLE to document our code properly <GenerateDocumentationFile>true</GenerateDocumentationFile> -->
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <StartupHookSupport Condition="'$(Configuration)' == 'Debug'">true</StartupHookSupport>
   </PropertyGroup>
-</Project>
+</Project>

src/Elastic.Documentation.Site/Elastic.Documentation.Site.csproj

@@ -10,7 +10,6 @@
     <EnableRequestDelegateGenerator>true</EnableRequestDelegateGenerator>
     <InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Microsoft.AspNetCore.Http.Generated</InterceptorsPreviewNamespaces>
     <IsPublishable>true</IsPublishable>
-    <StartupHookSupport Condition="'$(Configuration)' == 'Debug'">true</StartupHookSupport>
   </PropertyGroup>
 
   <ItemGroup>

src/tooling/docs-builder/Http/ReloadGeneratorService.cs

@@ -6,8 +6,24 @@
 using Microsoft.Extensions.Logging;
 using Westwind.AspNetCore.LiveReload;
 
+[assembly: System.Reflection.Metadata.MetadataUpdateHandler(typeof(Documentation.Builder.Http.HotReloadManager))]
+
 namespace Documentation.Builder.Http;
 
+public static class HotReloadManager
+{
+	public static void ClearCache(Type[]? _) => LiveReloadMiddleware.RefreshWebSocketRequest();
+
+	public static void UpdateApplication(Type[]? _) => Task.Run(async () =>
+	{
+		await Task.Delay(1000);
+		var __ = LiveReloadMiddleware.RefreshWebSocketRequest();
+		Console.WriteLine("UpdateApplication");
+	});
+
+}
+
+
 public sealed class ReloadGeneratorService(ReloadableGeneratorState reloadableGenerator, ILogger<ReloadGeneratorService> logger) : IHostedService, IDisposable
 {
 	private FileSystemWatcher? _watcher;
@@ -22,6 +38,9 @@ public async Task StartAsync(Cancel cancellationToken)
 		await ReloadableGenerator.ReloadAsync(cancellationToken);
 
 		var directory = ReloadableGenerator.Generator.DocumentationSet.SourceDirectory.FullName;
+#if DEBUG
+		directory = ReloadableGenerator.Generator.Context.DocumentationCheckoutDirectory?.FullName ?? throw new InvalidOperationException("No checkout directory");
+#endif
 		Logger.LogInformation("Start file watch on: {Directory}", directory);
 		var watcher = new FileSystemWatcher(directory)
 		{
@@ -40,6 +59,9 @@ public async Task StartAsync(Cancel cancellationToken)
 		watcher.Renamed += OnRenamed;
 		watcher.Error += OnError;
 
+#if DEBUG
+		watcher.Filters.Add("*.cshtml");
+#endif
 		watcher.Filters.Add("*.md");
 		watcher.Filters.Add("docset.yml");
 		watcher.IncludeSubdirectories = true;
@@ -73,6 +95,10 @@ private void OnChanged(object sender, FileSystemEventArgs e)
 			Reload();
 		if (e.FullPath.EndsWith(".md"))
 			Reload();
+#if DEBUG
+		if (e.FullPath.EndsWith(".cshtml"))
+			_ = LiveReloadMiddleware.RefreshWebSocketRequest();
+#endif
 
 	}
 
@@ -97,6 +123,10 @@ private void OnRenamed(object sender, RenamedEventArgs e)
 		Logger.LogInformation("    New: {NewFullPath}", e.FullPath);
 		if (e.FullPath.EndsWith(".md"))
 			Reload();
+#if DEBUG
+		if (e.FullPath.EndsWith(".cshtml"))
+			_ = LiveReloadMiddleware.RefreshWebSocketRequest();
+#endif
 	}
 
 	private void OnError(object sender, ErrorEventArgs e) =>