Add new composer/component to add marker file only when clean install or an upgrade runtime state

src/Umbraco.Web/Telemetry/TelemetryMarkerComponent.cs

@@ -0,0 +1,52 @@
+using System;
+using System.IO;
+using Umbraco.Core;
+using Umbraco.Core.Composing;
+using Umbraco.Core.IO;
+using Umbraco.Core.Logging;
+
+namespace Umbraco.Web.Telemetry
+{
+    public class TelemetryMarkerComponent : IComponent
+    {
+        private IProfilingLogger _logger;
+        private IRuntimeState _runtime;
+
+        public TelemetryMarkerComponent(IProfilingLogger logger, IRuntimeState runtime)
+        {
+            _logger = logger;
+            _runtime = runtime;
+        }
+
+        public void Initialize()
+        {
+            var telemetricsFilePath = IOHelper.MapPath(SystemFiles.TelemetricsIdentifier);
+
+            // Verify file does not exist already
+            // If the site is upgraded and the file was removed it would re-create one
+            if (File.Exists(telemetricsFilePath))
+            {
+                _logger.Warn<TelemetryMarkerComponent>("When installing or upgrading the anonymous telemetry file already existsed on disk at {filePath} with the runtime state {runtimeStateLevel}", telemetricsFilePath, _runtime.Level);
+                return;
+            }
+
+            // Generate GUID
+            var telemetrySiteIdentifier = Guid.NewGuid();
+
+            // Write file contents
+            try
+            {
+                File.WriteAllText(telemetricsFilePath, telemetrySiteIdentifier.ToString());
+            }
+            catch (Exception ex)
+            {
+                _logger.Error<TelemetryMarkerComponent>(ex, "Unable to create telemetry file at {filePath}", telemetricsFilePath);
+            }
+
+        }
+
+        public void Terminate()
+        {
+        }
+    }
+}

src/Umbraco.Web/Telemetry/TelemetryMarkerComposer.cs

@@ -0,0 +1,9 @@
+using Umbraco.Core;
+using Umbraco.Core.Composing;
+
+namespace Umbraco.Web.Telemetry
+{
+    [RuntimeLevel(MinLevel = RuntimeLevel.Install, MaxLevel = RuntimeLevel.Upgrade)]
+    public class TelemetryMarkerComposer : ComponentComposer<TelemetryMarkerComponent>, ICoreComposer
+    { }
+}

src/Umbraco.Web/Umbraco.Web.csproj

@@ -297,8 +297,10 @@
     <Compile Include="Models\LinkType.cs" />
     <Compile Include="Models\TemplateQuery\OperatorFactory.cs" />
     <Compile Include="Telemetry\ReportSiteTask.cs" />
+    <Compile Include="Telemetry\TelemetryMarkerComponent.cs" />
     <Compile Include="Telemetry\TelemetryComponent.cs" />
     <Compile Include="Telemetry\TelemetryComposer.cs" />
+    <Compile Include="Telemetry\TelemetryMarkerComposer.cs" />
     <Compile Include="Templates\HtmlLocalLinkParser.cs" />
     <Compile Include="Templates\HtmlImageSourceParser.cs" />
     <Compile Include="Templates\HtmlUrlParser.cs" />