Update manifest

src/Microsoft.Tye.Core/PorterManifestGenerator.cs

@@ -32,6 +32,28 @@ namespace Microsoft.Tye
                     mapping.Add("tag", image.ImageTag);
                 }
             }
+            var mixins = new YamlSequenceNode();
+            root.Add("mixins", mixins);
+            mixins.Add("exec");
+
+            var installSeq = new YamlSequenceNode();
+            root.Add("install", installSeq);
+            var installExec = new YamlMappingNode();
+            installSeq.Add(installExec);
+            var args = new YamlMappingNode();
+            installExec.Add("exec", args);
+            args.Add("command", "ls");
+            args.Add("description", "ls");
+
+            //root.Add("upgrade", "");
+            var uninstallSeq = new YamlSequenceNode();
+            root.Add("uninstall", uninstallSeq);
+            var uninstallExec = new YamlMappingNode();
+            uninstallSeq.Add(uninstallExec);
+            var unargs = new YamlMappingNode();
+            uninstallExec.Add("exec", unargs);
+            unargs.Add("command", "ls");
+            unargs.Add("description", "ls");
 
             return new YamlDocument(root);
         }

src/Microsoft.Tye.Core/PorterPublisher.cs

@@ -11,16 +11,22 @@ namespace Microsoft.Tye
     {
         public static async Task PublishAsync(OutputContext output, YamlDocument document, ApplicationBuilder builder)
         {
-            var tempFile = TempFile.Create();
+            using var tempFile = TempFile.Create();
 
             {
                 await using var stream = File.OpenWrite(tempFile.FilePath);
                 await using var writer = new StreamWriter(stream, new UTF8Encoding(encoderShouldEmitUTF8Identifier: false), leaveOpen: true);
                 var yamlStream = new YamlStream(document);
                 yamlStream.Save(writer, assignAnchors: false);
+            }
 
-                await ProcessUtil.RunAsync("porter", $"publish -f {tempFile.FilePath}");
+            var res = await ProcessUtil.RunAsync("porter", $"publish -f {tempFile.FilePath}", throwOnError: false);
+            if (res.ExitCode != 0)
+            {
+                output.WriteInfoLine(res.StandardError);
+                output.WriteInfoLine(res.StandardOutput);
             }
+
         }
     }
 }