Fixed: build error after adding reference to JADNC.Kiota package (#1721)

* Fixed: build error after adding reference to JADNC.Kiota package, without any kiota references in project file yet

* Increment OpenAPI preview number

Author: bkoelman

Directory.Build.props

@@ -11,7 +11,7 @@
     <RunSettingsFilePath>$(MSBuildThisFileDirectory)tests.runsettings</RunSettingsFilePath>
     <VersionPrefix>5.7.1</VersionPrefix>
     <VersionSuffix>pre</VersionSuffix>
-    <OpenApiPreviewNumber>1</OpenApiPreviewNumber>
+    <OpenApiPreviewNumber>2</OpenApiPreviewNumber>
     <NuGetAuditMode>direct</NuGetAuditMode>
   </PropertyGroup>
 

src/JsonApiDotNetCore.OpenApi.Client.Kiota/Build/JsonApiDotNetCore.OpenApi.Client.Kiota.targets

@@ -149,8 +149,8 @@
   </Target>
 
   <!-- Include **/*.cs from output directory afterward, so that MSBuild properly refreshes if .cs files appear/disappear when openapi.json file changed -->
-  <Target Name="_KiotaIncludeGeneratedCode" Condition="'$(DesignTimeBuild)' != 'true' And '$(BuildingProject)' == 'true'" DependsOnTargets="_KiotaRunTool"
-    BeforeTargets="BeforeCompile;CoreCompile">
+  <Target Name="_KiotaIncludeGeneratedCode" Condition="'$(DesignTimeBuild)' != 'true' And '$(BuildingProject)' == 'true' And '@(KiotaReference)' != ''"
+    DependsOnTargets="_KiotaRunTool" BeforeTargets="BeforeCompile;CoreCompile">
     <ItemGroup>
       <_WildcardGroup Include="%2A%2A/%2A.cs">
         <GeneratedCodeDirectory>%(KiotaReference._NonEmptyOutputPath)</GeneratedCodeDirectory>