Refactor expression flag management to be more sane

Author: lilith

.vscode/launch.json

@@ -2,6 +2,20 @@
     "version": "0.2.0",
     "configurations": [
 
+        // Build solution in repo root, Imageflow.Server.sln
+        {
+            "name": "build",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            "program": "${workspaceFolder}/src/Imageflow.Server/bin/Debug/net8.0/Imageflow.Server.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}/src/Imageflow.Server",
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+
+
         {
             "name": "netcoredbg ImazenShared.Tests",
             "type": "coreclr",

.vscode/settings.json

@@ -19,6 +19,7 @@
     "azureFunctions.projectSubpath": "src\\Imageflow.Server.AzureFunctions",
     "csharp.lsp.enable": true,
 
-    "dotnet.testExplorer.testProjectPath": "tests\\**\\**\\*Tests.csproj"
+    "dotnet.testExplorer.testProjectPath": "tests\\**\\**\\*Tests.csproj",
+    "eslint.enable": false
 
 }

src/Imazen.Routing/Layers/RoutingExpressions/RoutingExpressionLayer.cs

@@ -54,7 +54,7 @@ public RoutingExpressionLayer(IOptionsMonitor<UriRoutingOptions> options, IReLog
         {
             group.OnProvidersChanged += () => ReloadRoutes(options.CurrentValue,_providers, _providerGroups);
         }
-        ReloadRoutes(options.CurrentValue,_providers, _providerGroups);
+        _providerSet =ReloadRoutes(options.CurrentValue,_providers, _providerGroups);
     }
 
     // Any schema allowed, but a scheme: is required.
@@ -68,7 +68,7 @@ public RoutingExpressionLayer(IOptionsMonitor<UriRoutingOptions> options, IReLog
         AllowedFlagRegexes: null);
 
 
-    private void ReloadRoutes(UriRoutingOptions options, List<IRoutedBlobProvider> providers, List<IRoutedBlobProviderGroup> providerGroups)
+    private RoutingExpressionProviderSet ReloadRoutes(UriRoutingOptions options, List<IRoutedBlobProvider> providers, List<IRoutedBlobProviderGroup> providerGroups)
     {
 
         configIssues.ClearIssues();
@@ -90,6 +90,7 @@ private void ReloadRoutes(UriRoutingOptions options, List<IRoutedBlobProvider> p
             throw new Exception("Failed to create routing expression provider set: " + criticalError);
         }
         _providerSet = set;
+        return set;
 
     }