C#: Switch games to MSBuild Sdks and .NET Standard

.editorconfig

@@ -20,3 +20,7 @@ indent_size = 4
 [.travis.yml]
 indent_style = space
 indent_size = 2
+
+[*.{csproj,props,targets,nuspec}]
+indent_style = space
+indent_size = 2

modules/mono/csharp_script.cpp

@@ -44,7 +44,6 @@
 
 #ifdef TOOLS_ENABLED
 #include "editor/bindings_generator.h"
-#include "editor/csharp_project.h"
 #include "editor/editor_node.h"
 #include "editor/node_dock.h"
 #endif
@@ -3759,13 +3758,9 @@ Error ResourceFormatSaverCSharpScript::save(const String &p_path, const RES &p_r
 
 #ifdef TOOLS_ENABLED
 	if (!FileAccess::exists(p_path)) {
-		// The file does not yet exists, let's assume the user just created this script
-
-		if (_create_project_solution_if_needed()) {
-			CSharpProject::add_item(GodotSharpDirs::get_project_csproj_path(),
-					"Compile",
-					ProjectSettings::get_singleton()->globalize_path(p_path));
-		} else {
+		// The file does not yet exist, let's assume the user just created this script. In such
+		// cases we need to check whether the solution and csproj were already created or not.
+		if (!_create_project_solution_if_needed()) {
 			ERR_PRINT("C# project could not be created; cannot add file: '" + p_path + "'.");
 		}
 	}

modules/mono/editor/Godot.NET.Sdk/Godot.NET.Sdk.sln

@@ -0,0 +1,16 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Godot.NET.Sdk", "Godot.NET.Sdk\Godot.NET.Sdk.csproj", "{31B00BFA-DEA1-42FA-A472-9E54A92A8A5F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{31B00BFA-DEA1-42FA-A472-9E54A92A8A5F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{31B00BFA-DEA1-42FA-A472-9E54A92A8A5F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{31B00BFA-DEA1-42FA-A472-9E54A92A8A5F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{31B00BFA-DEA1-42FA-A472-9E54A92A8A5F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

modules/mono/editor/Godot.NET.Sdk/Godot.NET.Sdk/Godot.NET.Sdk.csproj

@@ -0,0 +1,35 @@
+<Project Sdk="Microsoft.Build.NoTargets/2.0.1">
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+
+    <Description>MSBuild .NET Sdk for Godot projects.</Description>
+    <Authors>Godot Engine contributors</Authors>
+
+    <PackageId>Godot.NET.Sdk</PackageId>
+    <Version>4.0.0</Version>
+    <PackageVersion>4.0.0-dev2</PackageVersion>
+    <PackageProjectUrl>https://github.com/godotengine/godot/tree/master/modules/mono/editor/Godot.NET.Sdk</PackageProjectUrl>
+    <PackageType>MSBuildSdk</PackageType>
+    <PackageTags>MSBuildSdk</PackageTags>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <NuspecFile>Godot.NET.Sdk.nuspec</NuspecFile>
+    <GenerateNuspecDependsOn>$(GenerateNuspecDependsOn);SetNuSpecProperties</GenerateNuspecDependsOn>
+  </PropertyGroup>
+
+  <Target Name="SetNuSpecProperties" Condition=" Exists('$(NuspecFile)') ">
+    <PropertyGroup>
+      <NuspecProperties>
+        id=$(PackageId);
+        description=$(Description);
+        authors=$(Authors);
+        version=$(PackageVersion);
+        packagetype=$(PackageType);
+        tags=$(PackageTags);
+        projecturl=$(PackageProjectUrl)
+      </NuspecProperties>
+    </PropertyGroup>
+  </Target>
+</Project>

modules/mono/editor/Godot.NET.Sdk/Godot.NET.Sdk/Godot.NET.Sdk.nuspec

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<package xmlns="http://schemas.microsoft.com/packaging/2011/10/nuspec.xsd">
+  <metadata>
+    <id>$id$</id>
+    <version>$version$</version>
+    <description>$description$</description>
+    <authors>$authors$</authors>
+    <owners>$authors$</owners>
+    <projectUrl>$projecturl$</projectUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <license type="expression">MIT</license>
+    <licenseUrl>https://licenses.nuget.org/MIT</licenseUrl>
+    <tags>$tags$</tags>
+    <packageTypes>
+      <packageType name="$packagetype$" />
+    </packageTypes>
+    <repository url="$projecturl$" />
+  </metadata>
+  <files>
+    <file src="Sdk\**" target="Sdk" />\
+  </files>
+</package>

modules/mono/editor/Godot.NET.Sdk/Godot.NET.Sdk/Sdk/Sdk.props

@@ -0,0 +1,112 @@
+<Project>
+  <PropertyGroup>
+    <!-- Determines if we should import Microsoft.NET.Sdk, if it wasn't already imported. -->
+    <GodotSdkImportsMicrosoftNetSdk Condition=" '$(UsingMicrosoftNETSdk)' != 'true' ">true</GodotSdkImportsMicrosoftNetSdk>
+
+    <GodotProjectTypeGuid>{8F3E2DF0-C35C-4265-82FC-BEA011F4A7ED}</GodotProjectTypeGuid>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <Configurations>Debug;ExportDebug;ExportRelease</Configurations>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+
+    <GodotProjectDir Condition=" '$(SolutionDir)' != '' ">$(SolutionDir)</GodotProjectDir>
+    <GodotProjectDir Condition=" '$(SolutionDir)' == '' ">$(MSBuildProjectDirectory)</GodotProjectDir>
+    <GodotProjectDir>$([MSBuild]::EnsureTrailingSlash('$(GodotProjectDir)'))</GodotProjectDir>
+
+    <!-- Custom output paths for Godot projects. In brief, 'bin\' and 'obj\' are moved to '$(GodotProjectDir)\.mono\temp\'. -->
+    <BaseOutputPath>$(GodotProjectDir).mono\temp\bin\</BaseOutputPath>
+    <OutputPath>$(GodotProjectDir).mono\temp\bin\$(Configuration)\</OutputPath>
+    <!--
+    Use custom IntermediateOutputPath and BaseIntermediateOutputPath only if it wasn't already set.
+    Otherwise the old values may have already been changed by MSBuild which can cause problems with NuGet.
+    -->
+    <IntermediateOutputPath Condition=" '$(IntermediateOutputPath)' == '' ">$(GodotProjectDir).mono\temp\obj\$(Configuration)\</IntermediateOutputPath>
+    <BaseIntermediateOutputPath Condition=" '$(BaseIntermediateOutputPath)' == '' ">$(GodotProjectDir).mono\temp\obj\</BaseIntermediateOutputPath>
+
+    <!-- Do not append the target framework name to the output path. -->
+    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+  </PropertyGroup>
+
+  <Import Sdk="Microsoft.NET.Sdk" Project="Sdk.props" Condition=" '$(GodotSdkImportsMicrosoftNetSdk)' == 'true' " />
+
+  <PropertyGroup>
+    <EnableDefaultNoneItems>false</EnableDefaultNoneItems>
+  </PropertyGroup>
+
+  <!--
+  The Microsoft.NET.Sdk only understands of the Debug and Release configurations.
+  We need to set the following properties manually for ExportDebug and ExportRelease.
+  -->
+  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' or '$(Configuration)' == 'ExportDebug' ">
+    <DebugSymbols Condition=" '$(DebugSymbols)' == '' ">true</DebugSymbols>
+    <Optimize Condition=" '$(Optimize)' == '' ">false</Optimize>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'ExportRelease' ">
+    <Optimize Condition=" '$(Optimize)' == '' ">true</Optimize>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <GodotApiConfiguration Condition=" '$(Configuration)' != 'ExportRelease' ">Debug</GodotApiConfiguration>
+    <GodotApiConfiguration Condition=" '$(Configuration)' == 'ExportRelease' ">Release</GodotApiConfiguration>
+  </PropertyGroup>
+
+  <!-- Auto-detect the target Godot platform if it was not specified. -->
+  <PropertyGroup Condition=" '$(GodotTargetPlatform)' == '' ">
+    <GodotTargetPlatform Condition=" '$([MSBuild]::IsOsPlatform(Linux))' ">linuxbsd</GodotTargetPlatform>
+    <GodotTargetPlatform Condition=" '$([MSBuild]::IsOsPlatform(FreeBSD))' ">linuxbsd</GodotTargetPlatform>
+    <GodotTargetPlatform Condition=" '$([MSBuild]::IsOsPlatform(OSX))' ">osx</GodotTargetPlatform>
+    <GodotTargetPlatform Condition=" '$([MSBuild]::IsOsPlatform(Windows))' ">windows</GodotTargetPlatform>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <GodotRealTIsDouble Condition=" '$(GodotRealTIsDouble)' == '' ">false</GodotRealTIsDouble>
+  </PropertyGroup>
+
+  <!-- Godot DefineConstants. -->
+  <PropertyGroup>
+    <!-- Define constant to identify Godot builds. -->
+    <GodotDefineConstants>GODOT</GodotDefineConstants>
+
+    <!--
+    Define constant to determine the target Godot platform. This includes the
+    recognized platform names and the platform category (PC, MOBILE or WEB).
+    -->
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'windows' ">GODOT_WINDOWS;GODOT_PC</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'linuxbsd' ">GODOT_LINUXBSD;GODOT_PC</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'osx' ">GODOT_OSX;GODOT_MACOS;GODOT_PC</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'server' ">GODOT_SERVER;GODOT_PC</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'uwp' ">GODOT_UWP;GODOT_PC</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'haiku' ">GODOT_HAIKU;GODOT_PC</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'android' ">GODOT_ANDROID;GODOT_MOBILE</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'iphone' ">GODOT_IPHONE;GODOT_IOS;GODOT_MOBILE</GodotPlatformConstants>
+    <GodotPlatformConstants Condition=" '$(GodotTargetPlatform)' == 'javascript' ">GODOT_JAVASCRIPT;GODOT_HTML5;GODOT_WASM;GODOT_WEB</GodotPlatformConstants>
+
+    <GodotDefineConstants>$(GodotDefineConstants);$(GodotPlatformConstants)</GodotDefineConstants>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <!-- ExportDebug also defines DEBUG like Debug does. -->
+    <DefineConstants Condition=" '$(Configuration)' == 'ExportDebug' ">$(DefineConstants);DEBUG</DefineConstants>
+    <!-- Debug defines TOOLS to differenciate between Debug and ExportDebug configurations. -->
+    <DefineConstants Condition=" '$(Configuration)' == 'Debug' ">$(DefineConstants);TOOLS</DefineConstants>
+
+    <DefineConstants>$(GodotDefineConstants);$(DefineConstants)</DefineConstants>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <!--
+    TODO:
+    We should consider a nuget package for reference assemblies. This is difficult because the
+    Godot scripting API is continuaslly breaking backwards compatibility even in patch releases.
+    -->
+    <Reference Include="GodotSharp">
+      <Private>false</Private>
+      <HintPath>$(GodotProjectDir).mono\assemblies\$(GodotApiConfiguration)\GodotSharp.dll</HintPath>
+    </Reference>
+    <Reference Include="GodotSharpEditor" Condition=" '$(Configuration)' == 'Debug' ">
+      <Private>false</Private>
+      <HintPath>$(GodotProjectDir).mono\assemblies\$(GodotApiConfiguration)\GodotSharpEditor.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+</Project>

modules/mono/editor/Godot.NET.Sdk/Godot.NET.Sdk/Sdk/Sdk.targets

@@ -0,0 +1,17 @@
+<Project>
+  <Import Sdk="Microsoft.NET.Sdk" Project="Sdk.targets" Condition=" '$(GodotSdkImportsMicrosoftNetSdk)' == 'true' " />
+
+  <PropertyGroup>
+    <EnableGodotProjectTypeGuid Condition=" '$(EnableGodotProjectTypeGuid)' == '' ">true</EnableGodotProjectTypeGuid>
+    <ProjectTypeGuids Condition=" '$(EnableGodotProjectTypeGuid)' == 'true' ">$(GodotProjectTypeGuid);$(DefaultProjectTypeGuid)</ProjectTypeGuids>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <!--
+    Define constant to determine whether the real_t type in Godot is double precision or not.
+    By default this is false, like the official Godot builds. If someone is using a custom
+    Godot build where real_t is double, they can override the GodotRealTIsDouble property.
+    -->
+    <DefineConstants Condition=" '$(GodotRealTIsDouble)' == 'true' ">GODOT_REAL_T_IS_DOUBLE;$(DefineConstants)</DefineConstants>
+  </PropertyGroup>
+</Project>

modules/mono/editor/GodotTools/GodotTools.Core/FileUtils.cs

@@ -19,7 +19,10 @@ public static void SaveBackupCopy(string filePath)
             }
 
             if (attempt > maxAttempts + 1)
-                return;
+            {
+                // Overwrite the oldest one
+                backupPath = backupPathBase;
+            }
 
             File.Copy(filePath, backupPath, overwrite: true);
         }

modules/mono/editor/GodotTools/GodotTools.ProjectEditor/IdentifierUtils.cs

@@ -22,6 +22,37 @@ public static string SanitizeQualifiedIdentifier(string qualifiedIdentifier, boo
             return string.Join(".", identifiers);
         }
 
+        /// <summary>
+        /// Skips invalid identifier characters including decimal digit numbers at the start of the identifier.
+        /// </summary>
+        private static void SkipInvalidCharacters(string source, int startIndex, StringBuilder outputBuilder)
+        {
+            for (int i = startIndex; i < source.Length; i++)
+            {
+                char @char = source[i];
+
+                switch (char.GetUnicodeCategory(@char))
+                {
+                    case UnicodeCategory.UppercaseLetter:
+                    case UnicodeCategory.LowercaseLetter:
+                    case UnicodeCategory.TitlecaseLetter:
+                    case UnicodeCategory.ModifierLetter:
+                    case UnicodeCategory.LetterNumber:
+                    case UnicodeCategory.OtherLetter:
+                        outputBuilder.Append(@char);
+                        break;
+                    case UnicodeCategory.NonSpacingMark:
+                    case UnicodeCategory.SpacingCombiningMark:
+                    case UnicodeCategory.ConnectorPunctuation:
+                    case UnicodeCategory.DecimalDigitNumber:
+                        // Identifiers may start with underscore
+                        if (outputBuilder.Length > startIndex || @char == '_')
+                            outputBuilder.Append(@char);
+                        break;
+                }
+            }
+        }
+
         public static string SanitizeIdentifier(string identifier, bool allowEmpty)
         {
             if (string.IsNullOrEmpty(identifier))
@@ -44,30 +75,7 @@ public static string SanitizeIdentifier(string identifier, bool allowEmpty)
                 startIndex += 1;
             }
 
-            for (int i = startIndex; i < identifier.Length; i++)
-            {
-                char @char = identifier[i];
-
-                switch (Char.GetUnicodeCategory(@char))
-                {
-                    case UnicodeCategory.UppercaseLetter:
-                    case UnicodeCategory.LowercaseLetter:
-                    case UnicodeCategory.TitlecaseLetter:
-                    case UnicodeCategory.ModifierLetter:
-                    case UnicodeCategory.LetterNumber:
-                    case UnicodeCategory.OtherLetter:
-                        identifierBuilder.Append(@char);
-                        break;
-                    case UnicodeCategory.NonSpacingMark:
-                    case UnicodeCategory.SpacingCombiningMark:
-                    case UnicodeCategory.ConnectorPunctuation:
-                    case UnicodeCategory.DecimalDigitNumber:
-                        // Identifiers may start with underscore
-                        if (identifierBuilder.Length > startIndex || @char == '_')
-                            identifierBuilder.Append(@char);
-                        break;
-                }
-            }
+            SkipInvalidCharacters(identifier, startIndex, identifierBuilder);
 
             if (identifierBuilder.Length == startIndex)
             {