Add hidden generate command (good for testing)

src/micronetes/Micronetes.Hosting/Properties/launchSettings.json

@@ -0,0 +1,16 @@
+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true
+  },
+  "profiles": {
+    "Micronetes.Hosting": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "http://localhost:5001"
+    }
+  }
+}

src/tye/Program.GenerateCommand.cs

@@ -0,0 +1,123 @@
+using System;
+using System.Collections.Generic;
+using System.CommandLine;
+using System.CommandLine.Invocation;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+using Opulence;
+using Tye.ConfigModel;
+
+namespace Tye
+{
+    static partial class Program
+    {
+        public static Command CreateGenerateCommand()
+        {
+            var command = new Command("generate", "Generate kubernetes manifests")
+            {
+                CommonArguments.Path_Required,
+                StandardOptions.Verbosity,
+            };
+
+            // 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>((console, path, verbosity) =>
+            {
+                // Workaround for https://github.com/dotnet/command-line-api/issues/723#issuecomment-593062654
+                if (path is null)
+                {
+                    throw new CommandException("No project or solution file was found.");
+                }
+
+                var application = ConfigFactory.FromFile(path);
+                return ExecuteAsync(new OutputContext(console, verbosity), application, environment: "production");
+            });
+
+            return command;
+        }
+
+        private static async Task ExecuteAsync(OutputContext output, ConfigApplication application, string environment)
+        {
+            var globals = new ApplicationGlobals()
+            {
+                Name = application.Name,
+                Registry = application.Registry is null ? null : new ContainerRegistry(application.Registry),
+            };
+
+            var services = new List<Opulence.ServiceEntry>();
+            foreach (var configService in application.Services)
+            {
+                if (configService.Project is string projectFile)
+                {
+                    var project = new Project(projectFile);
+                    var service = new Service(configService.Name)
+                    {
+                        Source = project,
+                    };
+                    var serviceEntry = new ServiceEntry(service, configService.Name);
+
+                    await ProjectReader.ReadProjectDetailsAsync(output, new FileInfo(projectFile), project);
+
+                    var container = new ContainerInfo();
+                    service.GeneratedAssets.Container = container;
+                    services.Add(serviceEntry);
+                }
+            }
+
+            var opulenceApplication = new OpulenceApplicationAdapter(application, globals, services);
+            if (opulenceApplication.Globals.Registry?.Hostname == null )
+            {
+                var registry = output.Prompt("Enter the Container Registry (ex: 'example.azurecr.io' for Azure or 'example' for dockerhub)");
+                opulenceApplication.Globals.Registry = new ContainerRegistry(registry);
+            }
+            else if (opulenceApplication.Globals.Registry?.Hostname == null)
+            {
+                throw new CommandException("A registry is required for generate operations. Add the registry to 'tye.yaml' or use '-i' for interactive mode.");
+            }
+
+            foreach (var service in opulenceApplication.Services)
+            {
+                if (service.Service.Source is Project project && service.Service.GeneratedAssets.Container is ContainerInfo container)
+                {
+                    DockerfileGenerator.ApplyContainerDefaults(opulenceApplication, service, project, container);
+                }
+            }
+
+            var steps = new List<ServiceExecutor.Step>()
+            {
+                new CombineStep() { Environment = environment, },
+                new BuildDockerImageStep() { Environment = environment, }, // Make an image but don't push it
+            };
+
+            steps.Add(new GenerateKubernetesManifestStep() { Environment = environment, });
+
+            var executor = new ServiceExecutor(output, opulenceApplication, steps);
+            foreach (var service in opulenceApplication.Services)
+            {
+                await executor.ExecuteAsync(service);
+            }
+
+            await GenerateApplicationManifestAsync(output, opulenceApplication, application.Source.Directory.Name, environment);
+        }
+
+        private static async Task GenerateApplicationManifestAsync(OutputContext output, Opulence.Application application, string applicationName, string environment)
+        {
+            using var step = output.BeginStep("Generating Application Manifests...");
+
+            var outputFilePath = Path.GetFullPath(Path.Combine(".", $"{applicationName}-{environment}.yaml"));
+            output.WriteInfoLine($"Writing output to '{outputFilePath}'.");
+
+            {
+                using var stream = File.OpenWrite(outputFilePath);
+                using var writer = new StreamWriter(stream, Encoding.UTF8, leaveOpen: true);
+
+                await ApplicationYamlWriter.WriteAsync(output, writer, application);
+            }
+
+            step.MarkComplete();
+        }
+    }
+}