Added a simple live asset rebuild system.

.gitignore

@@ -288,6 +288,9 @@ __pycache__/
 *.xsd.cs
 
 
+# MacOS Nonsense
+.DS_Store
+
 
 #
 # Ignores for FNA-Template

FNATemplate/AssetRebuild.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Diagnostics;
+using System.IO;
+
+namespace FNATemplate
+{
+#if DEBUG
+	static class AssetRebuild
+	{
+		public static bool Run()
+		{
+			try
+			{
+				// This file is generated at build time (see ContentRebuilder.targets)
+				string infoPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "AssetRebuildInfo.txt");
+				if(!File.Exists(infoPath))
+				{
+					Debug.WriteLine("AssetRebuild: Could not find file " + infoPath);
+					return false;
+				}
+
+				string[] lines = File.ReadAllLines(infoPath);
+				if(lines.Length < 2)
+				{
+					Debug.WriteLine("AssetRebuild: Missing data in " + infoPath);
+					return false;
+				}
+
+				string msBuildDirectory = lines[0];
+				if(!Directory.Exists(msBuildDirectory))
+				{
+					Debug.WriteLine("AssetRebuild: Could not directory " + msBuildDirectory);
+					return false;
+				}
+
+				string projectPath = lines[1];
+				if(!File.Exists(projectPath))
+				{
+					Debug.WriteLine("AssetRebuild: Could not find " + projectPath);
+					return false;
+				}
+				
+				string msBuildPath;
+				if(Environment.OSVersion.Platform == PlatformID.Win32NT)
+				{
+					msBuildPath = Path.Combine(msBuildDirectory, "MSBuild");
+				}
+				else
+				{
+                    // The msbuild command isn't where we expect it on Xamarin, so just rely on PATH.
+					msBuildPath = "msbuild";
+				}
+
+				Process process = new Process();
+				process.StartInfo.FileName = msBuildPath;
+				process.StartInfo.Arguments = @"/t:BuildContentOnly";
+				process.StartInfo.WorkingDirectory = Path.GetDirectoryName(projectPath); // <- MSBuild will automatically find the csproj file.
+				process.Start();
+				process.WaitForExit();
+
+				Debug.WriteLine("AssetRebuild: Completed");
+				return true;
+			}
+			catch(Exception e)
+			{
+				Debug.WriteLine("AssetRebuild: Failed with: " + e.ToString());
+				return false;
+			}
+		}
+	}
+#endif
+}

FNATemplate/FNATemplate.csproj

@@ -62,6 +62,7 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="AssetRebuild.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="FNATemplateGame.cs" />
@@ -86,6 +87,7 @@
   <Import Project="$(MSBuildExtensionsPath)\MonoGame\v3.0\MonoGame.Content.Builder.targets" />
   <Import Project="..\build\BuildShaders.targets" />
   <Import Project="..\build\CopyFNALibs.targets" />
+  <Import Project="..\build\ContentRebuilder.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">

FNATemplate/FNATemplateGame.cs

@@ -5,6 +5,7 @@ using System.Text;
 using System.IO;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
 
 namespace FNATemplate
 {
@@ -46,18 +47,51 @@ namespace FNATemplate
 			base.LoadContent();
 		}
 
+		protected override void UnloadContent()
+		{
+			Content.Unload();
+
+			spriteBatch.Dispose();
+			exampleEffect.Dispose();
+
+			base.UnloadContent();
+		}
+
+
+		KeyboardState lastKeyboardState;
 
 		protected override void Update(GameTime gameTime)
 		{
-			// Insert your game update logic here.
+			KeyboardState keyboardState = Keyboard.GetState();
 
+			//
+			// Asset Rebuilding:
+#if DEBUG
+			const Keys assetRebuildKey = Keys.F5;
+			if(keyboardState.IsKeyDown(assetRebuildKey) && lastKeyboardState.IsKeyUp(assetRebuildKey))
+			{
+				if(AssetRebuild.Run())
+				{
+					UnloadContent();
+					LoadContent();
+				}
+			}
+#endif
+
+			//
+			// Insert your game update logic here.
+			//
+
+			lastKeyboardState = keyboardState;
 			base.Update(gameTime);
 		}
 
 
 		protected override void Draw(GameTime gameTime)
 		{
+			//
 			// Replace this with your own drawing code.
+			//
 
 			GraphicsDevice.Clear(Color.CornflowerBlue);
 

build/ContentRebuilder.targets

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+	<!-- Allow fast rebuild of MonoGame content. Expects MonoGame.Content.Builder.targets to have been included. -->
+	<Target Name="BuildContentOnly" DependsOnTargets="BuildContent;BuildShaders;_CopySourceItemsToOutputDirectory" />
+	
+	<!-- So what we call at runtime matches what we're building now... -->
+	<Target Name="WriteAssetRebuildInfo" BeforeTargets="Compile"
+			Condition="'$(Configuration)' == 'Debug'">
+		<WriteLinesToFile
+				File="$(OutputPath)AssetRebuildInfo.txt"
+				Lines="$(MSBuildToolsPath);$(MSBuildProjectFullPath)"
+				Overwrite="true"
+				Encoding="Unicode"/>
+	</Target>
+
+</Project>