Publish the SDK NuGet packages to the Transport Feed (dotnet#1687)

* Publish the SDK NuGet packages to the Transport Feed.
dotnet/sdk#1637

* Changes per code review...

.gitignore

@@ -112,9 +112,6 @@ DocProject/Help/*.hhp
 DocProject/Help/Html2
 DocProject/Help/html
 
-# Click-Once directory
-publish/
-
 # Publish Web Output
 *.Publish.xml
 

build/Publish/Publish.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
+  <PropertyGroup>
+    <BuildTasksFeedDllVersion>1.0.0-prerelease-01929-02</BuildTasksFeedDllVersion>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisFileDirectory)\PublishNupkgToTransportFeed.targets" />
+
+  <PropertyGroup>
+    <TargetFramework>net46</TargetFramework>
+    <CopyBuildOutputToOutputDirectory>false</CopyBuildOutputToOutputDirectory>
+    <CopyOutputSymbolsToOutputDirectory>false</CopyOutputSymbolsToOutputDirectory>
+    <OutputType>Library</OutputType>
+    <GenerateDependencyFile>false</GenerateDependencyFile>
+    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
+    <NonShipping>true</NonShipping>
+    <NoStdLib>true</NoStdLib>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.DotNet.Build.Tasks.Feed" Version="$(BuildTasksFeedDllVersion)" />
+  </ItemGroup>
+</Project>

build/Publish/PublishNupkgToTransportFeed.targets

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'Common.props'))\Common.props" />
+
+  <PropertyGroup>
+    <!-- Capture 'OutputPath' before Publish.csproj modifies it -->
+    <OutputPathTransportFeed>$(OutputPath)</OutputPathTransportFeed>
+    <BuildTasksFeedDll>$(NuGet_Packages)\Microsoft.DotNet.Build.Tasks.Feed\$(BuildTasksFeedDllVersion)\lib\desktop\Microsoft.DotNet.Build.Tasks.Feed.dll</BuildTasksFeedDll>
+  </PropertyGroup>
+
+  <UsingTask TaskName="PushToBlobFeed" AssemblyFile="$(BuildTasksFeedDll)" />
+
+  <ItemGroup>
+    <NupkgsForPublishing Include="$(OutputPathTransportFeed)Packages\Microsoft.NET.Sdk.*.nupkg" />
+    <NupkgsForPublishing Include="$(OutputPathTransportFeed)Packages\Microsoft.NET.Build.Extensions.*.nupkg" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <RelativePath>packages</RelativePath>
+    <TransportFeedContainerName>$(TRANSPORTFEED_STORAGE_CONTAINER)</TransportFeedContainerName>
+    <TransportFeedContainerName Condition="'$(TransportFeedContainerName)' == ''">dotnet-core</TransportFeedContainerName>
+    <TransportFeedCloudDropAccessToken>$(TRANSPORTFEED_STORAGE_KEY)</TransportFeedCloudDropAccessToken>
+    <TransportFeedCloudDropAccountName>$(TRANSPORTFEED_STORAGE_ACCOUNT)</TransportFeedCloudDropAccountName>
+    <TransportFeedCloudDropAccountName Condition="'$(TransportFeedCloudDropAccountName)' == ''">dotnetfeed</TransportFeedCloudDropAccountName>
+  </PropertyGroup>
+
+  <Target Name="PublishNupkgToTransportFeed"
+          Condition=" '$(PUBLISH_NUPKG_TO_TRANSPORT_FEED)' == 'true' "
+          DependsOnTargets="RestorePackageForTransportFeed;
+                            PushNupkgToTransportFeed" />
+
+  <Target Name="RestorePackageForTransportFeed">
+    <PropertyGroup>
+      <NewLineTF>
+        <![CDATA[
+]]>
+      </NewLineTF>
+      <SetNuget_PackagesTF>set NUGET_PACKAGES=$(NuGet_Packages)</SetNuget_PackagesTF>
+      <SetDotnet_Skip_FirstTime>set DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true</SetDotnet_Skip_FirstTime>
+      <PublishProjectFile>"$(MSBuildThisFileDirectory)Publish.csproj"</PublishProjectFile>
+    </PropertyGroup>
+
+    <Exec Command="$(SetNuget_PackagesTF)$(NewLineTF)$(SetDotnet_Skip_FirstTime)$(NewLineTF)$(DotNetTool) restore $(PublishProjectFile) /v:minimal"
+          WorkingDirectory="$(RepositoryRootDirectory)" />
+  </Target>
+
+  <Target Name="PushNupkgToTransportFeed" >
+    <Error Condition="'$(TransportFeedContainerName)' == ''" Text="Missing property TransportFeedContainerName." />
+    <Error Condition="'$(TransportFeedCloudDropAccountName)' == ''" Text="Missing property TransportFeedCloudDropAccountName." />
+    <Error Condition="'$(TransportFeedCloudDropAccessToken)' == ''" Text="Missing property TransportFeedCloudDropAccessToken." />
+
+    <Message Text="Publish to $(TransportFeedContainerName) started" />
+    <PushToBlobFeed AccountKey="$(TransportFeedCloudDropAccessToken)"
+                AccountName="$(TransportFeedCloudDropAccountName)"
+                ContainerName="$(TransportFeedContainerName)"
+                IndexDirectory="$(IndexDirectory)"
+                ItemsToPush="@(NupkgsForPublishing)"
+                Overwrite="false"
+                PublishFlatContainer="false"
+                RelativePath="$(RelativePath)" />
+  </Target>
+
+</Project>