Make user secrets work in docker scenarios. (#152)

* Make user secrets work in docker scenarios.
- Make build errors show up in the output

* Small nits

src/Microsoft.Tye.Core/ProcessUtil.cs

@@ -81,10 +81,6 @@ namespace Microsoft.Tye
                     {
                         errorDataReceived.Invoke(e.Data);
                     }
-                    else if (outputDataReceived != null)
-                    {
-                        outputDataReceived.Invoke(e.Data);
-                    }
                     else
                     {
                         errorBuilder.AppendLine(e.Data);

src/Microsoft.Tye.Hosting/DockerRunner.cs

@@ -4,11 +4,12 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.Tye.Hosting.Model;
 using Microsoft.Extensions.Logging;
+using Microsoft.Tye.Hosting.Model;
 
 namespace Microsoft.Tye.Hosting
 {
@@ -71,6 +72,15 @@ namespace Microsoft.Tye.Hosting
             var volumes = "";
             var workingDirectory = docker.WorkingDirectory != null ? $"-w {docker.WorkingDirectory}" : "";
 
+            // This is .NET specific
+            var userSecretStore = GetUserSecretsPathFromSecrets();
+
+            if (!string.IsNullOrEmpty(userSecretStore))
+            {
+                // Map the user secrets on this drive to user secrets
+                docker.VolumeMappings[userSecretStore] = "/root/.microsoft/usersecrets:ro";
+            }
+
             var dockerInfo = new DockerInformation(new Task[service.Description.Replicas]);
 
             async Task RunDockerContainer(IEnumerable<(int Port, int? InternalPort, int BindingPort, string? Protocol)> ports)
@@ -260,21 +270,29 @@ namespace Microsoft.Tye.Hosting
             }
         }
 
-        private static async Task<bool> DetectDockerInstalled()
+        private static string? GetUserSecretsPathFromSecrets()
         {
-            // Detect Docker installation
-            try
-            {
-                await ProcessUtil.RunAsync("docker", "version", throwOnError: false);
-                return true;
-            }
-            catch (Exception)
+            // This is the logic used to determine the user secrets path
+            // See https://github.com/dotnet/extensions/blob/64140f90157fec1bfd8aeafdffe8f30308ccdf41/src/Configuration/Config.UserSecrets/src/PathHelper.cs#L27
+            const string userSecretsFallbackDir = "DOTNET_USER_SECRETS_FALLBACK_DIR";
+
+            // For backwards compat, this checks env vars first before using Env.GetFolderPath
+            var appData = Environment.GetEnvironmentVariable("APPDATA");
+            var root = appData                                                                   // On Windows it goes to %APPDATA%\Microsoft\UserSecrets\
+                       ?? Environment.GetEnvironmentVariable("HOME")                             // On Mac/Linux it goes to ~/.microsoft/usersecrets/
+                       ?? Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
+                       ?? Environment.GetFolderPath(Environment.SpecialFolder.UserProfile)
+                       ?? Environment.GetEnvironmentVariable(userSecretsFallbackDir);            // this fallback is an escape hatch if everything else fails
+
+            if (string.IsNullOrEmpty(root))
             {
-                // Unfortunately, process throws
-                return false;
+                return null;
             }
-        }
 
+            return !string.IsNullOrEmpty(appData)
+                ? Path.Combine(root, "Microsoft", "UserSecrets")
+                : Path.Combine(root, ".microsoft", "usersecrets");
+        }
 
         private class DockerInformation
         {

src/Microsoft.Tye.Hosting/ProcessRunner.cs

@@ -108,13 +108,13 @@ namespace Microsoft.Tye.Hosting
 
                 service.Logs.OnNext($"dotnet build \"{service.Status.ProjectFilePath}\" /nologo");
 
-                var buildResult = await ProcessUtil.RunAsync("dotnet", $"build \"{service.Status.ProjectFilePath}\" /nologo",
-                                                            outputDataReceived: data => service.Logs.OnNext(data),
-                                                            throwOnError: false);
+                var buildResult = await ProcessUtil.RunAsync("dotnet", $"build \"{service.Status.ProjectFilePath}\" /nologo", throwOnError: false);
+
+                service.Logs.OnNext(buildResult.StandardOutput);
 
                 if (buildResult.ExitCode != 0)
                 {
-                    _logger.LogInformation("Building {ProjectFile} failed with exit code {ExitCode}: " + buildResult.StandardOutput + buildResult.StandardError, service.Status.ProjectFilePath, buildResult.ExitCode);
+                    _logger.LogInformation("Building {ProjectFile} failed with exit code {ExitCode}: \r\n" + buildResult.StandardOutput, service.Status.ProjectFilePath, buildResult.ExitCode);
                     return;
                 }
             }

src/Microsoft.Tye.Hosting/TransformProjectsIntoContainers.cs

@@ -50,13 +50,16 @@ namespace Microsoft.Tye.Hosting
 
             service.Logs.OnNext($"dotnet publish \"{service.Status.ProjectFilePath}\" /nologo");
 
-            var buildResult = await ProcessUtil.RunAsync("dotnet", $"publish \"{service.Status.ProjectFilePath}\" /nologo",
-                                                        outputDataReceived: data => service.Logs.OnNext(data),
-                                                        throwOnError: false);
+            var buildResult = await ProcessUtil.RunAsync("dotnet", $"publish \"{service.Status.ProjectFilePath}\" /nologo", throwOnError: false);
+
+            service.Logs.OnNext(buildResult.StandardOutput);
 
             if (buildResult.ExitCode != 0)
             {
-                _logger.LogInformation("Publishing {ProjectFile} failed with exit code {ExitCode}: " + buildResult.StandardOutput + buildResult.StandardError, service.Status.ProjectFilePath, buildResult.ExitCode);
+                _logger.LogInformation("Publishing {ProjectFile} failed with exit code {ExitCode}: \r\n" + buildResult.StandardOutput, service.Status.ProjectFilePath, buildResult.ExitCode);
+
+                // Null out the RunInfo so that
+                serviceDescription.RunInfo = null;
                 return;
             }
 
@@ -78,7 +81,7 @@ namespace Microsoft.Tye.Hosting
 
         private static string DetermineContainerImage(string targetFramework)
         {
-            // TODO: Determine the base iamge from the tfm
+            // TODO: Determine the base image from the tfm
             return "mcr.microsoft.com/dotnet/core/sdk:3.1-buster";
         }