Add the ability to specify a namespace for tye deploy.

src/Microsoft.Tye.Core/ApplicationBuilder.cs

@@ -19,6 +19,8 @@ namespace Microsoft.Tye
 
         public string Name { get; set; }
 
+        public string? Namespace { get; set; }
+
         public ContainerRegistry? Registry { get; set; }
 
         public List<ExtensionConfiguration> Extensions { get; } = new List<ExtensionConfiguration>();

src/Microsoft.Tye.Core/ApplicationFactory.cs

@@ -28,7 +28,7 @@ namespace Microsoft.Tye
             rootConfig.Validate();
 
             var root = new ApplicationBuilder(source, rootConfig.Name ?? source.Directory.Name.ToLowerInvariant());
-
+            root.Namespace = rootConfig.Namespace;
             queue.Enqueue(rootConfig);
 
             while (queue.Count > 0)

src/Microsoft.Tye.Core/ConfigModel/ConfigApplication.cs

@@ -24,6 +24,8 @@ namespace Microsoft.Tye.ConfigModel
 
         public string? Name { get; set; }
 
+        public string? Namespace { get; set; }
+
         public string? Registry { get; set; }
 
         public string? Network { get; set; }

src/Microsoft.Tye.Core/GenerateKubernetesManifestStep.cs

@@ -12,6 +12,8 @@ namespace Microsoft.Tye
 
         public string Environment { get; set; } = "production";
 
+        public string? Namespace { get; set; } = null;
+
 
         public override Task ExecuteAsync(OutputContext output, ApplicationBuilder application, ServiceBuilder service)
         {

src/Microsoft.Tye.Core/KubernetesManifestGenerator.cs

@@ -26,6 +26,9 @@ namespace Microsoft.Tye
             var metadata = new YamlMappingNode();
             root.Add("metadata", metadata);
             metadata.Add("name", project.Name);
+            if (!String.IsNullOrEmpty(application.Namespace)) {
+                metadata.Add("namespace", application.Namespace);
+            }
 
             if (service.Annotations.Count > 0)
             {
@@ -104,6 +107,9 @@ namespace Microsoft.Tye
             var metadata = new YamlMappingNode();
             root.Add("metadata", metadata);
             metadata.Add("name", project.Name);
+            if (!String.IsNullOrEmpty(application.Namespace)) {
+                metadata.Add("namespace", application.Namespace);
+            }
 
             if (deployment.Annotations.Count > 0)
             {

src/Microsoft.Tye.Core/Serialization/ConfigApplicationParser.cs

@@ -20,6 +20,9 @@ namespace Tye.Serialization
                     case "name":
                         app.Name = YamlParser.GetScalarValue(key, child.Value);
                         break;
+                    case "namespace":
+                        app.Namespace = YamlParser.GetScalarValue(key, child.Value);
+                        break;
                     case "network":
                         app.Network = YamlParser.GetScalarValue(key, child.Value);
                         break;

src/Microsoft.Tye.Core/StandardOptions.cs

@@ -195,5 +195,18 @@ namespace Microsoft.Tye
                 };
             }
         }
+
+        public static Option Namespace
+        {
+            get
+            {
+                return new Option(new[] { "-n", "--namespace" })
+                {
+                    Description = "Specify the namespace for the deployment",
+                    Required = false,
+                    Argument = new Argument<string>(),
+                };
+            }
+        }
     }
 }

src/tye/GenerateHost.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Collections.Generic;
 using System.CommandLine;
 using System.IO;
@@ -12,7 +13,7 @@ namespace Microsoft.Tye
 {
     public static class GenerateHost
     {
-        public static async Task GenerateAsync(IConsole console, FileInfo path, Verbosity verbosity, bool interactive)
+        public static async Task GenerateAsync(IConsole console, FileInfo path, Verbosity verbosity, bool interactive, string ns)
         {
             var output = new OutputContext(console, verbosity);
 
@@ -22,7 +23,10 @@ namespace Microsoft.Tye
             {
                 throw new CommandException($"No services found in \"{application.Source.Name}\"");
             }
-
+            if (!String.IsNullOrEmpty(ns))
+            {
+                application.Namespace = ns;
+            }
             await ExecuteGenerateAsync(output, application, environment: "production", interactive);
         }
 

src/tye/Program.DeployCommand.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Collections.Generic;
 using System.CommandLine;
 using System.CommandLine.Invocation;
@@ -21,6 +22,7 @@ namespace Microsoft.Tye
                 CommonArguments.Path_Required,
                 StandardOptions.Interactive,
                 StandardOptions.Verbosity,
+                StandardOptions.Namespace,
             };
 
             command.AddOption(new Option(new[] { "-f", "--force" })
@@ -29,7 +31,7 @@ namespace Microsoft.Tye
                 Required = false
             });
 
-            command.Handler = CommandHandler.Create<IConsole, FileInfo, Verbosity, bool, bool>(async (console, path, verbosity, interactive, force) =>
+            command.Handler = CommandHandler.Create<IConsole, FileInfo, Verbosity, bool, bool, string>(async (console, path, verbosity, interactive, force, @namespace) =>
             {
                 // Workaround for https://github.com/dotnet/command-line-api/issues/723#issuecomment-593062654
                 if (path is null)
@@ -45,7 +47,10 @@ namespace Microsoft.Tye
                 {
                     throw new CommandException($"No services found in \"{application.Source.Name}\"");
                 }
-
+                if (!String.IsNullOrEmpty(@namespace))
+                {
+                    application.Namespace = @namespace;
+                }
                 await ExecuteDeployAsync(new OutputContext(console, verbosity), application, environment: "production", interactive, force);
             });
 
@@ -75,7 +80,7 @@ namespace Microsoft.Tye
                 new ValidateSecretStep() { Environment = environment, Interactive = interactive, Force = force, },
             };
 
-            steps.Add(new GenerateKubernetesManifestStep() { Environment = environment, });
+            steps.Add(new GenerateKubernetesManifestStep() { Environment = environment, Namespace = application.Namespace });
             steps.Add(new DeployServiceYamlStep() { Environment = environment, });
 
             ApplyRegistryAndDefaults(output, application, interactive, requireRegistry: true);
@@ -103,7 +108,12 @@ namespace Microsoft.Tye
                 await ApplicationYamlWriter.WriteAsync(output, writer, application);
             }
 
-            output.WriteDebugLine("Running 'kubectl apply'.");
+            string ns = $"namespace ${application.Namespace}";
+            if (String.IsNullOrEmpty(application.Namespace))
+            {
+                ns = "current namespace";
+            }
+            output.WriteDebugLine($"Running 'kubectl apply' in ${ns}");
             output.WriteCommandLine("kubectl", $"apply -f \"{tempFile.FilePath}\"");
             var capture = output.Capture();
             var exitCode = await Process.ExecuteAsync(

src/tye/Program.GenerateCommand.cs

@@ -21,13 +21,14 @@ namespace Microsoft.Tye
                 CommonArguments.Path_Required,
                 StandardOptions.Interactive,
                 StandardOptions.Verbosity,
+                StandardOptions.Namespace,
             };
 
             // This is a super-secret VIP-only command! It's useful for testing, but we're 
             // not documenting it right now.
             command.IsHidden = true;
 
-            command.Handler = CommandHandler.Create<IConsole, FileInfo, Verbosity, bool>((console, path, verbosity, interactive) =>
+            command.Handler = CommandHandler.Create<IConsole, FileInfo, Verbosity, bool, string>((console, path, verbosity, interactive, @namespace) =>
             {
                 // Workaround for https://github.com/dotnet/command-line-api/issues/723#issuecomment-593062654
                 if (path is null)
@@ -35,7 +36,7 @@ namespace Microsoft.Tye
                     throw new CommandException("No project or solution file was found.");
                 }
 
-                return GenerateHost.GenerateAsync(console, path, verbosity, interactive);
+                return GenerateHost.GenerateAsync(console, path, verbosity, interactive, @namespace);
             });
 
             return command;