Minor refactor of elan-init.ps1 for ContrainedLanguage Mode

[davide-pozzoni-uk-gt]

The current version of elan-init.ps1 does not work in ConstrainedLanguage Mode of powershell for only one line

$temp = [System.IO.Path]::GetTempPath()

Replace that line with $env equivalents to work in ConstrainedLanguage Mode

$temp = $env:TMP
if (-not $temp) { $temp = $env:TEMP }
if (-not $temp) { $temp = $env:USERPROFILE }

[Kha]

So what happens if none of these are set? This PR doesn't seem very thought through tbh.

[davide-pozzoni-uk-gt]

So what happens if none of these are set? This PR doesn't seem very thought through tbh.

the fallback of GetTempPath() when it cannot retreive TMP or TEMP or USERPROFILE, is $env:SystemRoot } # e.g. C:\Windows

I can add if (-not $temp) { $temp = $env:SystemRoot } too if you prefer (even tho it is extremely unlikely that it would fallback to that)

GetTempPath() is a lookup function (with lookup order TMP → TEMP → USERPROFILE → Windows dir)

https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-gettemppathw

[davide-pozzoni-uk-gt]

0fb33b8
now the only difference between the $env behaviour and [System.IO.Path]::GetTempPath() is that the latter is cross-platform compatible https://learn.microsoft.com/en-us/dotnet/api/system.io.path.gettemppath?view=net-10.0&tabs=linux. But this script only supports windows anyway, so I believe that is not relevant. That said for cross-platform compatibility

if ($IsLinux -or $IsMacOS) {
    $temp = $env:TMPDIR
    if (-not $temp) { $temp = '/tmp' }
}
else {
    $temp = $env:TMP
    if (-not $temp) { $temp = $env:TEMP }
    if (-not $temp) { $temp = $env:USERPROFILE }
    if (-not $temp) { $temp = $env:SystemRoot }
}

it can use that

[Kha]

Thanks!