powershell 中导入 vs 环境变量

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# 查找 vs 路径
$vswhere=-Join(
    $env:PROGRAMFILES,
    " (x86)\Microsoft Visual Studio\Installer\vswhere.exe"
    )
$vsinstalldir = &$vswhere -latest -products * -requires Microsoft.Component.MSBuild -property installationPath

if ($vsinstalldir -and (test-path "$vsinstalldir\Common7\Tools\vsdevcmd.bat")) {
  & "${env:COMSPEC}" /s /c "`""$vsinstalldir\Common7\Tools\vsdevcmd.bat"`" -no_logo && set" | foreach-object {
    $name, $value = $_ -split '=', 2
    set-content env:\"$name" $value
  }
}
# only for vs2017
$msbuild=-Join(
    $vsinstalldir,
    "\MSBuild\15.0\Bin\MSBuild.exe")

# 查找 win10 sdk 版本
# 读取注册表的值
function Get-RegistryValue{
    [CmdletBinding()] param (
        [Parameter(Mandatory = $true)] [string] $key,
        [Parameter(Mandatory = $true)] [string] $value
    )
    (Get-ItemProperty $key $value).$value
}

$win10sdk_version = Get-RegistryValue 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Microsoft SDKs\Windows\v10.0' ProductVersion
$win10sdk_version = -Join($win10sdk_version, ".0")

# 取代sdk版本
function Replace-Win10Sdk {
    [CmdletBinding()] param (
        [Parameter(Mandatory = $true)] [string] $target_file,
        [Parameter(Mandatory = $true)] [string] $target_version
    )
    $data = Get-Content -Path $target_file -Encoding UTF8
    $data = $data -replace '(<WindowsTargetPlatformVersion>)[0-9\.]+(</WindowsTargetPlatformVersion>)', "`${1}$target_version`${2}"
    Out-File -FilePath $target_file -Encoding UTF8 -Force  -InputObject $data
}