disables task on msbuild version <18

disables GitVersion task on .NET Framework with MSBuild < 18.
updates conditions for UsingTask to use explicit string comparisons.

Author: arturcic

src/GitVersion.MsBuild/msbuild/tools/GitVersion.MsBuild.props

@@ -21,6 +21,12 @@
     </PropertyGroup>
 
     <PropertyGroup>
+        <!-- The GitVersion task is explicitly disabled when running on the .NET Framework with MSBuild version lower than 18
+        or in Visual Studio 2022 or earlier (which uses MSBuild version 17 and below). In these scenarios,
+        the task will be turned off because Visual Studio operates on the .NET Framework's version of MSBuild.
+        However, it is supported from msbuild version 18 or Visual Studio 2026, or using the .NET version `dotnet build` -->
+        <DisableGitVersionTask Condition=" '$(MSBuildRuntimeType)' == 'Full' AND $([System.Version]::Parse('$(MSBuildVersion)').Major) &lt; 18 ">true</DisableGitVersionTask>
+
         <DisableGitVersionTask Condition=" '$(DisableGitVersionTask)' == '' ">false</DisableGitVersionTask>
 
         <!-- Property that enables WriteVersionInfoToBuildLog -->

src/GitVersion.MsBuild/msbuild/tools/GitVersion.MsBuild.targets

@@ -18,15 +18,15 @@
         <GitVersionAssemblyFile Condition="'$(GitVersionAssemblyFile)' == ''">$([MSBuild]::EnsureTrailingSlash($(MSBuildThisFileDirectory)$(GitVersionTargetFramework)))GitVersion.MsBuild.dll</GitVersionAssemblyFile>
     </PropertyGroup>
 
-    <UsingTask TaskName="GetVersion" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition="$(MSBuildRuntimeType) == 'Full'" />
-    <UsingTask TaskName="GenerateGitVersionInformation" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition="$(MSBuildRuntimeType) == 'Full'" />
-    <UsingTask TaskName="WriteVersionInfoToBuildLog" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition="$(MSBuildRuntimeType) == 'Full'" />
-    <UsingTask TaskName="UpdateAssemblyInfo" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition="$(MSBuildRuntimeType) == 'Full'" />
-
-    <UsingTask TaskName="GetVersion" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition="$(MSBuildRuntimeType) == 'Core'" />
-    <UsingTask TaskName="GenerateGitVersionInformation" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition="$(MSBuildRuntimeType) == 'Core'" />
-    <UsingTask TaskName="WriteVersionInfoToBuildLog" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition="$(MSBuildRuntimeType) == 'Core'" />
-    <UsingTask TaskName="UpdateAssemblyInfo" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition="$(MSBuildRuntimeType) == 'Core'" />
+    <UsingTask TaskName="GetVersion" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition=" '$(MSBuildRuntimeType)' == 'Full' " />
+    <UsingTask TaskName="GenerateGitVersionInformation" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition=" '$(MSBuildRuntimeType)' == 'Full' " />
+    <UsingTask TaskName="WriteVersionInfoToBuildLog" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition=" '$(MSBuildRuntimeType)' == 'Full' " />
+    <UsingTask TaskName="UpdateAssemblyInfo" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" TaskFactory="TaskHostFactory" Condition=" '$(MSBuildRuntimeType)' == 'Full' " />
+
+    <UsingTask TaskName="GetVersion" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition=" '$(MSBuildRuntimeType)' == 'Core' " />
+    <UsingTask TaskName="GenerateGitVersionInformation" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition=" '$(MSBuildRuntimeType)' == 'Core' " />
+    <UsingTask TaskName="WriteVersionInfoToBuildLog" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition=" '$(MSBuildRuntimeType)' == 'Core' " />
+    <UsingTask TaskName="UpdateAssemblyInfo" AssemblyFile="$(GitVersionAssemblyFile)" Runtime="NET" Condition=" '$(MSBuildRuntimeType)' == 'Core' " />
 
     <Target Name="RunGitVersion" Condition="'$(DisableGitVersionTask)' == 'false'">
         <Exec Command="$(GitVersionFileExe) &quot;$(MSBuildProjectDirectory)&quot; $(GitVersion_ToolArgments)" />