.gitlab/ci/vcvarsall.ps1 - third_party/github.com/Kitware/CMake - Git at Google

 $erroractionpreference = "stop"

 $all_env = cmd /c "`"$env:VCVARSALL`" $env:VCVARSPLATFORM -vcvars_ver=$env:VCVARSVERSION >NUL & powershell -Command `"Get-ChildItem env: | Select-Object -Property Key,Value | ConvertTo-Json`"" | ConvertFrom-Json

 foreach ($envvar in $all_env) {
     [Environment]::SetEnvironmentVariable($envvar.Key, $envvar.Value)
 }
	$erroractionpreference = "stop"

	$all_env = cmd /c "`"$env:VCVARSALL`" $env:VCVARSPLATFORM -vcvars_ver=$env:VCVARSVERSION >NUL & powershell -Command `"Get-ChildItem env: \| Select-Object -Property Key,Value \| ConvertTo-Json`"" \| ConvertFrom-Json

	foreach ($envvar in $all_env) {
	[Environment]::SetEnvironmentVariable($envvar.Key, $envvar.Value)
	}