def "tailscale peer" [
	hostname?: string
	path?: cell-path
]: nothing -> any {
	let path = ($path | default ([] | into cell-path))

	let status = (^tailscale status --json | from json)

	let peers = ($status | get Peer | transpose key fields | flatten fields)

	let peers = ($peers | each { |peer|
		let ipv4 = $peer.TailscaleIPs | where { |ip| "." in $ip } | first
		let ipv6 = $peer.TailscaleIPs | where { |ip| ":" in $ip } | first

		{
			host: $peer.HostName,
			ipv4: $ipv4,
			ipv6: $ipv6,
			online: $peer.Online,
			active: $peer.Active,
			rx: ($peer.RxBytes | into filesize),
			tx: ($peer.TxBytes | into filesize),
		}
	})

	if $hostname == null {
		$peers
	} else {
		$peers | where host == $hostname | first | get $path
	}
}