utils: update the build-windows-toolchain.bat to extract the toolchain

Fetch a prebuilt toolchain to build the toolchain.  This is required to
enable the macro support on Windows.

Author: compnerd

utils/build-windows-toolchain.bat

@@ -50,6 +50,8 @@ del /f /q "%UniversalCRTSdkDir%\Include\%UCRTVersion%\um\module.modulemap"
 del /f /q "%VCToolsInstallDir%\include\module.modulemap"
 del /f /q "%VCToolsInstallDir%\include\vcruntime.apinotes"
 
+call :FetchWiX || (exit /b)
+call :FetchX64Toolchain || (exit /b)
 call :CloneDependencies || (exit /b)
 call :CloneRepositories || (exit /b)
 
@@ -815,6 +817,30 @@ git clone --quiet --no-tags --depth 1 --branch curl-7_77_0 https://github.com/cu
 goto :eof
 endlocal
 
+:FetchWiX
+setlocal enableextensions enabledelayedexpansion
+
+curl.exe -sL https://www.nuget.org/api/v2/package/wix/4.0.1 -o wix-4.0.1.zip
+md WiX-4.0.1 || exit (/b)
+cd WiX-4.0.1 || exit (/b)
+tar -xf ../wix-4.0.1.zip || exit (/b)
+
+goto :eof
+endlocal
+
+:FetchX64Toolchain
+setlocal enableextensions enabledelayedexpansion
+
+curl.exe -OL --ssl "download.swift.org/development/windows10/swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a/swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a-windows10.exe" || (exit /b)
+"WiX-4.0.1\tools\net6.0\any\wix.exe" burn extract swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a-windows10.exe -o %BuildRoot%\toolchains || (exit /b)
+msiexec.exe /qn /a "%BuildRoot%\toolchains\a0" TARGETDIR="%BuildRoot%\toolchains\swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a\PFiles64\Swift\Runtimes\0.0.0\usr\bin\  || (exit /b)
+msiexec.exe /qn /a "%BuildRoot%\toolchains\a1" TARGETDIR="%BuildRoot%\toolchains\swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a\  || (exit /b)
+msiexec.exe /qn /a "%BuildRoot%\toolchains\a2" TARGETDIR="%BuildRoot%\toolchains\swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a\  || (exit /b)
+msiexec.exe /qn /a "%BuildRoot%\toolchains\a5" TARGETDIR="%BuildRoot%\toolchains\swift-DEVELOPMENT-SNAPSHOT-2023-08-12-a\  || (exit /b)
+
+goto :eof
+endlocal
+
 :TestSwift
 setlocal enableextensions enabledelayedexpansion