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Author: sebastienros

src/Aspire.Hosting.Maui/MauiOtlpExtensions.cs

@@ -156,8 +156,8 @@ private static void ApplyOtlpConfigurationToPlatform<T>(
                 // Remove the service discovery variables since we're using direct OTLP configuration
                 context.EnvironmentVariables.Remove(serviceDiscoveryKey);
 
-                // Also remove the {RESOURCENAME}_{ENDPOINTNAME} format variable (e.g., MAUIAPP-OTLP_OTLP)
-                // The resource name keeps its case/dashes, endpoint name is uppercased
+                // Also remove the {RESOURCENAME}_{ENDPOINTNAME} format variable (e.g., MAUI_APP-OTLP_OTLP)
+                // The resource name is encoded and uppercased when DevTunnelsResourceBuilderExtensions.WithReference is invoked
                 var directEndpointKey = $"{EnvironmentVariableNameEncoder.Encode(tunnelConfig.OtlpStub.Name).ToUpperInvariant()}_OTLP";
                 context.EnvironmentVariables.Remove(directEndpointKey);
             }

src/Shared/EnvironmentVariableNameEncoder.cs

@@ -21,7 +21,7 @@ public static string Encode(string name)
     {
         if (string.IsNullOrEmpty(name))
         {
-            return "_";
+            return "";
         }
 
         if (ValidNameRegex().IsMatch(name))

tests/Aspire.Hosting.Maui.Tests/MauiPlatformExtensionsTests.cs

@@ -25,30 +25,30 @@ public class MauiPlatformExtensionsTests
             (maui, name) => maui.AddWindowsDevice(name),
             typeof(MauiWindowsPlatformResource)),
 
-        new PlatformTestConfig("MacCatalyst", "Mac Catalyst", "maccatalyst", "mauiapp-maccatalyst", "net10.0-maccatalyst",
-            (maui) => maui.AddMacCatalystDevice(),
-            (maui, name) => maui.AddMacCatalystDevice(name),
-            typeof(MauiMacCatalystPlatformResource)),
+        //new PlatformTestConfig("MacCatalyst", "Mac Catalyst", "maccatalyst", "mauiapp-maccatalyst", "net10.0-maccatalyst",
+        //    (maui) => maui.AddMacCatalystDevice(),
+        //    (maui, name) => maui.AddMacCatalystDevice(name),
+        //    typeof(MauiMacCatalystPlatformResource)),
 
-        new PlatformTestConfig("AndroidDevice", "Android", "android", "mauiapp-android-device", "net10.0-android",
-            (maui) => maui.AddAndroidDevice(),
-            (maui, name) => maui.AddAndroidDevice(name),
-            typeof(MauiAndroidDeviceResource)),
+        //new PlatformTestConfig("AndroidDevice", "Android", "android", "mauiapp-android-device", "net10.0-android",
+        //    (maui) => maui.AddAndroidDevice(),
+        //    (maui, name) => maui.AddAndroidDevice(name),
+        //    typeof(MauiAndroidDeviceResource)),
 
-        new PlatformTestConfig("AndroidEmulator", "Android", "android", "mauiapp-android-emulator", "net10.0-android",
-            (maui) => maui.AddAndroidEmulator(),
-            (maui, name) => maui.AddAndroidEmulator(name),
-            typeof(MauiAndroidEmulatorResource)),
+        //new PlatformTestConfig("AndroidEmulator", "Android", "android", "mauiapp-android-emulator", "net10.0-android",
+        //    (maui) => maui.AddAndroidEmulator(),
+        //    (maui, name) => maui.AddAndroidEmulator(name),
+        //    typeof(MauiAndroidEmulatorResource)),
 
-        new PlatformTestConfig("iOSDevice", "iOS", "ios", "mauiapp-ios-device", "net10.0-ios",
-            (maui) => maui.AddiOSDevice(),
-            (maui, name) => maui.AddiOSDevice(name),
-            typeof(MauiiOSDeviceResource)),
+        //new PlatformTestConfig("iOSDevice", "iOS", "ios", "mauiapp-ios-device", "net10.0-ios",
+        //    (maui) => maui.AddiOSDevice(),
+        //    (maui, name) => maui.AddiOSDevice(name),
+        //    typeof(MauiiOSDeviceResource)),
 
-        new PlatformTestConfig("iOSSimulator", "iOS", "ios", "mauiapp-ios-simulator", "net10.0-ios",
-            (maui) => maui.AddiOSSimulator(),
-            (maui, name) => maui.AddiOSSimulator(name),
-            typeof(MauiiOSSimulatorResource))
+        //new PlatformTestConfig("iOSSimulator", "iOS", "ios", "mauiapp-ios-simulator", "net10.0-ios",
+        //    (maui) => maui.AddiOSSimulator(),
+        //    (maui, name) => maui.AddiOSSimulator(name),
+        //    typeof(MauiiOSSimulatorResource))
     };
 
     [Theory]
@@ -615,6 +615,47 @@ public void WithOtlpDevTunnel_MultiplePlatforms_SharesSameInfrastructure(Platfor
         }
     }
 
+    [Theory]
+    [MemberData(nameof(AllPlatforms))]
+    public async Task WithOtlpDevTunnel_CleansUpIntermediateEnvironmentVariables(PlatformTestConfig config)
+    {
+        // Arrange
+        var projectContent = CreateProjectContent(config.RequiredTfm);
+        var tempFile = CreateTempProjectFile(projectContent);
+
+        try
+        {
+            var appBuilder = DistributedApplication.CreateBuilder();
+            var maui = appBuilder.AddMauiProject("mauiapp", tempFile);
+            var platform = config.AddPlatformWithDefaultName(maui);
+
+            // Act
+            config.ApplyWithOtlpDevTunnel(platform);
+
+            var envVars = await EnvironmentVariableEvaluator.GetEnvironmentVariablesAsync(
+                platform.Resource,
+                DistributedApplicationOperation.Run,
+                TestServiceProvider.Instance);
+
+            // Assert
+            Assert.True(envVars.TryGetValue("OTEL_EXPORTER_OTLP_ENDPOINT", out var endpointValue));
+            Assert.False(string.IsNullOrWhiteSpace(endpointValue));
+            Assert.True(Uri.TryCreate(endpointValue, UriKind.Absolute, out _));
+
+            var tunnelConfig = maui.Resource.Annotations.OfType<OtlpDevTunnelConfigurationAnnotation>().Single();
+            var stubName = tunnelConfig.OtlpStub.Name;
+            var serviceDiscoveryKey = $"services__{stubName}__otlp__0";
+            Assert.DoesNotContain(serviceDiscoveryKey, envVars.Keys);
+
+            var directEndpointKey = $"{EnvironmentVariableNameEncoder.Encode(stubName).ToUpperInvariant()}_OTLP";
+            Assert.DoesNotContain(directEndpointKey, envVars.Keys);
+        }
+        finally
+        {
+            CleanupTempFile(tempFile);
+        }
+    }
+
     // Helper methods
 
     private static string CreateProjectContent(string requiredTfm)

tests/Aspire.Hosting.Tests/Utils/EnvironmentVariableNameEncoderTests.cs

@@ -38,9 +38,9 @@ public void Encode_WhenNameStartsWithDigit_PrependsUnderscore(string name, strin
     }
 
     [Fact]
-    public void Encode_WhenNameIsNullOrEmpty_ReturnsSingleUnderscore()
+    public void Encode_WhenNameIsNullOrEmpty_ReturnsEmptyString()
     {
-        Assert.Equal("_", EnvironmentVariableNameEncoder.Encode(null!));
-        Assert.Equal("_", EnvironmentVariableNameEncoder.Encode(string.Empty));
+        Assert.Equal("", EnvironmentVariableNameEncoder.Encode(null!));
+        Assert.Equal("", EnvironmentVariableNameEncoder.Encode(string.Empty));
     }
 }