Enable long paths on windows

Readme.md

On Windows, you may encounter the error, "Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory:" followed by a long pathname to a file like sharded_mutable_dense_hashtable.cpython-37.pyc. Typically, this error happens because the depth of the folder path becomes too long. In this case, set the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem@LongPathsEnabled to 1 to enable long paths. Alternately, check where your Python interpreter is installed. If that location has a long path, try reinstalling in a folder with a shorter path.

Ref: https://docs.microsoft.com/en-us/azure/azure-functions/functions-machine-learning-tensorflow?tabs=cmd

Enable-LongPathSupport.ps1

$registryPath = "HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem"
$Name = "LongPathsEnabled"
$expectedValue = "1"

$currentValue=(Get-ItemProperty -Path $registryPath -Name $Name).$Name


if ($currentValue -ne $expectedValue){
  Write-Host "Enabling long path support"
  New-ItemProperty -Path $registryPath -Name $name -Value $expectedValue -PropertyType DWORD -Force | Out-Null
}
else{
  Write-Host "Long path support already activated"
}