New-ContainerHost.ps1 may fail when temp directory path elements are too long

[mikejhill]

When temp directory path elements are too long, the Get-Nsmm function within New-ContainerHost.ps1 obtains a path using one or more short names which causes the Remove-Item command to fail.

Related issue on ServerFault

We was able to workaround this issue by making the adjustment on line 1080 as mentioned in the accepted ServerFault answer:
- $nssmZip = "$($env:temp)\$(Split-Path $nssmUri -Leaf)"
+ $nssmZip = [System.IO.Path]::GetFullPath("$($env:temp)\$(Split-Path $nssmUri -Leaf)")

This is the error encountered when paths were long enough for short names to be used:

C:\New-ContainerHost.ps1 : An object at the specified path C:\Users\FILE~1.NAM does not exist.
At line:1 char:1
+ C:\New-ContainerHost.ps1 -VMName docker-hyperv -WindowsImage ServerD ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,New-ContainerHost.ps1

[neilpeterson]

Assuming this has been resolved with TP5 revision. Will re-open if necessary.