Update to use 7zip to create Kudu.zip

.gitignore

@@ -25,4 +25,5 @@ nuget.exe
 Kudu.Services.Web/commit.txt
 Setup/WebPiCmdSetup.log
 Kudu.Services.Web/node_modules/
-.vs/
+.vs/
+Build/7zip/

Build/7zip.targets

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+   <PropertyGroup>
+       <!-- Download 7zip if it does not already exist -->
+       <Download7Zip Condition=" '$(Download7Zip)' == '' ">true</Download7Zip>
+   </PropertyGroup>
+
+    <PropertyGroup>
+       <!-- NuGet command -->
+       <File7ZipPath>$(MsBuildThisFileDirectory)\7zip.zip</File7ZipPath>
+       <Exe7ZipPath>$(MsBuildThisFileDirectory)\7zip\7za.exe</Exe7ZipPath>
+   </PropertyGroup>
+
+   <Target Name="Ensure7Zip">
+       <!--
+       Take advantage of MsBuild's build dependency tracking to make sure that we only ever download 7zip once.
+       This effectively acts as a lock that makes sure that the download operation will only happen once and all
+       parallel builds will have to wait for it to complete.
+       -->
+       <MsBuild Targets="_Download7Zip" Projects="$(MSBuildThisFileFullPath)" Properties="Configuration=NOT_IMPORTANT;Platform=AnyCPU" />
+   </Target>
+
+   <Target Name="_Download7Zip">
+       <Download7Zip OutputFileName="$(File7ZipPath)" Condition=" '$(Download7Zip)' == 'true' AND !Exists('$(Exe7ZipPath)')" />
+   </Target>
+
+   <UsingTask TaskName="Download7Zip" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll">
+       <ParameterGroup>
+           <OutputFileName ParameterType="System.String" Required="true" />
+       </ParameterGroup>
+       <Task>
+           <Reference Include="System.Core" />
+           <Reference Include="System.IO.Compression"/>
+           <Reference Include="System.IO.Compression.FileSystem"/>
+           <Using Namespace="System" />
+           <Using Namespace="System.IO" />
+           <Using Namespace="System.IO.Compression" />
+           <Using Namespace="System.Net" />
+           <Using Namespace="Microsoft.Build.Framework" />
+           <Using Namespace="Microsoft.Build.Utilities" />
+           <Code Type="Fragment" Language="cs">
+               <![CDATA[
+               try {
+                   OutputFileName = Path.GetFullPath(OutputFileName);
+                   String outputFolderName = Path.Combine(Path.GetDirectoryName(OutputFileName), "7zip");
+
+                   Log.LogMessage("Downloading 7zip ...");
+                   WebClient webClient = new WebClient();
+                   webClient.DownloadFile("http://www.7-zip.org/a/7za920.zip", OutputFileName);
+                   ZipFile.ExtractToDirectory(OutputFileName, outputFolderName);
+                   File.Delete(OutputFileName);
+                   Log.LogMessage("Downloaded 7zip!");
+                   
+                   return true;
+               }
+               catch (Exception ex) {
+                   Log.LogErrorFromException(ex);
+                   return false;
+               }
+           ]]>
+           </Code>
+       </Task>
+   </UsingTask>
+</Project>

Build/Build.proj

@@ -2,6 +2,7 @@
 <Project ToolsVersion="4.0" DefaultTargets="RunAll" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <Import Project="$(MSBuildProjectDirectory)\Build.tasks" />
     <Import Project="$(MsBuildThisFileDirectory)\nuget.targets" />
+    <Import Project="$(MsBuildThisFileDirectory)\7zip.targets" />
 
     <PropertyGroup>
         <Configuration Condition="$(Configuration) == ''">Debug</Configuration>
@@ -37,9 +38,7 @@
     <Target Name="UpdateVersion" Condition="'$(BUILD_NUMBER)' != ''">
         <RegexTransform Items="@(RegexTransform)" />
     </Target>
-
-    <Target Name="RunAll" DependsOnTargets="UpdateVersion; RestorePackages; Build; ReportFxCopResults; RunTests; BuildSites; BuildZips; CopySymbols; BuildNuget" />
-
+    <Target Name="RunAll" DependsOnTargets="UpdateVersion; Ensure7Zip; RestorePackages; Build; ReportFxCopResults; RunTests; BuildSites; BuildZips; CopySymbols; BuildNuget" />
     <Target Name="CreateOutputPath">
         <MakeDir Directories="$(ArtifactsPath)\symbols" Condition="!Exists('$(ArtifactsPath)\symbols')" />
         <MakeDir Directories="$(TestResultsPath)" Condition="!Exists('$(TestResultsPath)')" />
@@ -100,41 +99,14 @@
         <PropertyGroup>
           <SourceDirectory>$(ArtifactsPath)\SiteExtensions</SourceDirectory>
           <ZipTargetPath>$(ArtifactsPath)\zip</ZipTargetPath>
+          <Exe7Zip>$(MsBuildThisFileDirectory)\7zip\7za.exe</Exe7Zip>
         </PropertyGroup> 
         <RemoveDir Directories="$(ZipTargetPath)" Condition=" Exists('$(ZipTargetPath)') " />
         <MakeDir Directories="$(ZipTargetPath)" />
-        <CreateZipFileFromDirectory
-            DestinationArchive="$(ZipTargetPath)\Kudu.zip"
-            SourceDirectory="$(SourceDirectory)"
-            IncludeBaseDirectory="true" />
+        <!-- 7Zip doesn`t have slient mode, write log into a file to avoid printing too much text onto screen -->
+        <Exec Command="$(Exe7Zip) a -y -r &quot;$(ZipTargetPath)\Kudu.zip&quot; &quot;$(ArtifactsPath)\SiteExtensions&quot; &gt; &quot;$(ZipTargetPath)\Kudu.zip.log&quot;" />    
         <Copy SourceFiles="$(ProjectRoot)\Setup\DeployPrivateKudu.cmd" DestinationFiles="$(ZipTargetPath)\DeployPrivateKudu.cmd" SkipUnchangedFiles="true" />
      </Target>
-
-    <!-- From https://github.com/sayedihashimi/slow-cheetah/blob/7681c20d9c1796b3628702b3e1288cc6c47884d1/.nuget/NuGet.targets#L101-L105 -->
-    <PropertyGroup Condition=" '$(ls-msbuildtasks-path)'=='' ">
-      <ls-msbuildtasks-path>$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll</ls-msbuildtasks-path>
-      <ls-msbuildtasks-path Condition=" !Exists('$(ls-msbuildtasks-path)')">$(MSBuildFrameworkToolsPath)\Microsoft.Build.Tasks.v4.0.dll</ls-msbuildtasks-path>
-      <ls-msbuildtasks-path Condition=" !Exists('$(ls-msbuildtasks-path)')">$(windir)\Microsoft.NET\Framework\v4.0.30319\Microsoft.Build.Tasks.v4.0.dll</ls-msbuildtasks-path>
-    </PropertyGroup>
-
-     <UsingTask TaskName="CreateZipFileFromDirectory" TaskFactory="CodeTaskFactory" AssemblyFile="$(ls-msbuildtasks-path)">
-        <ParameterGroup>
-          <DestinationArchive ParameterType="System.String" Required="true"/>
-          <SourceDirectory ParameterType="System.String" Required="true" />
-          <IncludeBaseDirectory ParameterType="System.Boolean" Required="true" />
-        </ParameterGroup>
-        <Task>
-          <Reference Include="$(ls-msbuildtasks-path)\..\System.IO.Compression.dll"/>
-          <Reference Include="$(ls-msbuildtasks-path)\..\System.IO.Compression.FileSystem.dll"/>
-          <Using Namespace="System.IO" />
-          <Using Namespace="System.IO.Compression" />
-          <Code Type="Fragment" Language="cs">
-            <![CDATA[
-                   ZipFile.CreateFromDirectory(SourceDirectory, DestinationArchive, System.IO.Compression.CompressionLevel.Optimal, IncludeBaseDirectory);
-              ]]>
-          </Code>
-        </Task>
-      </UsingTask>
 
       <Target Name="BuildNuget" Condition="'$(BUILD_NUMBER)' != ''">
         <PropertyGroup>