Renames project: Umbraco.ModelsBuilder.Embedded and namespaces since we need a different assembly, updates nuspec, changes file path of MB app_plugins

src/Umbraco.ModelsBuilder.Embedded/ModelsGenerationError.cs

@@ -0,0 +1,66 @@
+using System;
+using System.IO;
+using System.Text;
+using Umbraco.ModelsBuilder.Embedded.Configuration;
+
+namespace Umbraco.ModelsBuilder.Embedded
+{
+    public sealed class ModelsGenerationError
+    {
+        private readonly IModelsBuilderConfig _config;
+
+        public ModelsGenerationError(IModelsBuilderConfig config)
+        {
+            _config = config;
+        }
+
+        public void Clear()
+        {
+            var errFile = GetErrFile();
+            if (errFile == null) return;
+
+            // "If the file to be deleted does not exist, no exception is thrown."
+            File.Delete(errFile);
+        }
+
+        public void Report(string message, Exception e)
+        {
+            var errFile = GetErrFile();
+            if (errFile == null) return;
+
+            var sb = new StringBuilder();
+            sb.Append(message);
+            sb.Append("\r\n");
+            sb.Append(e.Message);
+            sb.Append("\r\n\r\n");
+            sb.Append(e.StackTrace);
+            sb.Append("\r\n");
+
+            File.WriteAllText(errFile, sb.ToString());
+        }
+
+        public string GetLastError()
+        {
+            var errFile = GetErrFile();
+            if (errFile == null) return null;
+
+            try
+            {
+                return File.ReadAllText(errFile);
+            }
+            catch // accepted
+            {
+                return null;
+            }
+        }
+
+        private string GetErrFile()
+        {
+            var modelsDirectory = _config.ModelsDirectory;
+            if (!Directory.Exists(modelsDirectory))
+                return null;
+
+            return Path.Combine(modelsDirectory, "models.err");
+        }
+    }
+}