Add workaround for tar warning about "file changed as we read it" in Docker under Windows host

eng/dockerrun.ps1

@@ -29,6 +29,7 @@ if ($noninteractive)
 docker run $interactiveFlag -t --rm --sig-proxy=true `
   --name "$dockerContainerName" `
   -v "${RepoRoot}:/opt/code" `
+  -e DOTNET_CORESDK_IGNORE_TAR_EXIT_CODE=1 `
   -e CHANNEL `
   -e DOTNET_BUILD_SKIP_CROSSGEN `
   -e PUBLISH_TO_AZURE_BLOB `

src/core-sdk-tasks/TarGzFileCreateFromDirectory.cs

@@ -38,6 +38,20 @@ namespace Microsoft.DotNet.Build.Tasks
         /// </summary>
         public ITaskItem[] ExcludePatterns { get; set; }
 
+        public bool IgnoreExitCode { get; set; }
+
+        protected override int ExecuteTool(string pathToTool, string responseFileCommands, string commandLineCommands)
+        {
+            int returnCode = base.ExecuteTool(pathToTool, responseFileCommands, commandLineCommands);
+
+            if (IgnoreExitCode)
+            {
+                returnCode = 0;
+            }
+
+            return returnCode;
+        }
+
         protected override bool ValidateParameters()
         {
             base.ValidateParameters();

src/redist/targets/GenerateArchives.targets

@@ -3,6 +3,13 @@
           DependsOnTargets="GenerateLayout;GetCurrentRuntimeInformation"
           AfterTargets="Build">
 
+    <!-- When running in Docker under a Windows host, tar is warning "file changed as we read it" for several files and returning exit code 1.
+         So this flag allows that to be ignored. -->
+    <PropertyGroup Condition="'$(IgnoreTarExitCode)' == ''">
+      <IgnoreTarExitCode>false</IgnoreTarExitCode>
+      <IgnoreTarExitCode Condition="'$(DOTNET_CORESDK_IGNORE_TAR_EXIT_CODE)' == '1'">true</IgnoreTarExitCode>
+    </PropertyGroup>
+
     <ZipFileCreateFromDirectory
         SourceDirectory="$(RedistLayoutPath)"
         DestinationArchive="$(ArtifactsShippingPackagesDir)$(ArtifactNameWithVersionSdk).zip"
@@ -12,7 +19,8 @@
         Condition=" '$(OSName)' != 'win' "
         SourceDirectory="$(RedistLayoutPath)"
         DestinationArchive="$(ArtifactsShippingPackagesDir)$(ArtifactNameWithVersionSdk).tar.gz"
-        OverwriteDestination="true" />
+        OverwriteDestination="true"
+        IgnoreExitCode="$(IgnoreTarExitCode)"/>
     
   </Target>
 </Project>