Powershell script to auto-alias the current WSL IP to a hostname

wslhost.ps1

# Adapted from https://community.spiceworks.com/topic/1583047-how-to-update-host-file-automatically-by-batch-file

if ($args.Count -lt 2)
{
    "wslhost (distro name) (hostname) [actually write]"
    wsl --list
    return;
}

$distro = $args[0]
$targethost = $args[1]

$ip = $( wsl -d $distro hostname -I )
$pattern = '^*' + $targethost + '.*$'
$file = "$( $env:SystemRoot )\System32\drivers\etc\hosts"
$hosts = Get-Content -Path $file

"$ip $targethost"

$hosts = $hosts | Foreach {
    if ($_ -match $pattern)
    {
        # Replace line
        "$ip $targethost"
    }
    else
    {
        # Keep current line
        $_
    }
}

if ($args[2] -eq "write" -or $args[2] -eq "true")
{
    $hosts | Out-File $file -enc ASCII

    "Written to System32\drivers\etc\hosts"
}
else
{
    $hosts

    "Use 'wslhost $distro $targethost write' to write to the hosts file (requires elevated privileges)"
}