fix: Block running Tool targets in Metapackage builds (#218)

* build: Skip output of patch.ps1

* feat: Block running Tool targets in metapackage

closes #216

Author: amis92

src/CodeGeneration.Roslyn.PluginMetapackage.Sdk/Sdk/Sdk.props

@@ -5,6 +5,8 @@
     <!-- Announce this SDK (add *AsSdk to differentiate between using this as Sdk
       and normal PackageReference/dependency usage)-->
     <UsingCodeGenerationRoslynPluginMetapackageSdkAsSdk>true</UsingCodeGenerationRoslynPluginMetapackageSdkAsSdk>
+    <!-- Prevent running Tool targets in metapackage -->
+    <UsingCodeGenerationRoslynToolTargets>false</UsingCodeGenerationRoslynToolTargets>
   </PropertyGroup>
 
   <Import Project="../build/CodeGeneration.Roslyn.PluginMetapackage.Sdk.props" />

src/CodeGeneration.Roslyn.PluginMetapackage.Sdk/Sdk/Sdk.targets

@@ -14,6 +14,7 @@
     <PackageReference Include="CodeGeneration.Roslyn.Tool"
                       Version="$(CodeGenerationRoslynPluginMetapackageSdkVersion)"
                       IsImplicitlyDefined="true"
+                      ExcludeAssets="build"
                       PrivateAssets="none" />
   </ItemGroup>
 

src/CodeGeneration.Roslyn.Templates/patch.ps1

@@ -16,5 +16,5 @@ while ($InputFile) {
     if ($versionSymbol) {
         $versionSymbol.defaultValue = $Version
     }
-    New-Item $output -Value (ConvertTo-Json $json) -Force
+    $null = New-Item $output -Value (ConvertTo-Json $json) -Force
 }

src/CodeGeneration.Roslyn.Tool/build/CodeGeneration.Roslyn.Tool.props

@@ -6,7 +6,7 @@
       Announce this Tool's build artifacts are being used.
       Plugins can validate whether the Tool is available to use on this property.
     -->
-    <UsingCodeGenerationRoslynToolTargets>true</UsingCodeGenerationRoslynToolTargets>
+    <UsingCodeGenerationRoslynToolTargets Condition=" '$(UsingCodeGenerationRoslynToolTargets)' == '' ">true</UsingCodeGenerationRoslynToolTargets>
   </PropertyGroup>
 
   <ItemDefinitionGroup>

src/CodeGeneration.Roslyn.Tool/build/CodeGeneration.Roslyn.Tool.targets

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
-  <PropertyGroup>
+  <PropertyGroup Condition=" '$(UsingCodeGenerationRoslynToolTargets)' != 'false' ">
     <GenerateCodeFromAttributesDependsOn>
       $(GenerateCodeFromAttributesDependsOn);
       ResolveReferences;
@@ -14,6 +14,7 @@
 
   <Target
     Name="GenerateCodeFromAttributes"
+    Condition=" '$(UsingCodeGenerationRoslynToolTargets)' != 'false' "
     DependsOnTargets="$(GenerateCodeFromAttributesDependsOn)"
     BeforeTargets="CoreCompile;PrepareResources">
   </Target>