wsl: add wsl-clipboard script

wsl/README.md

@@ -8,6 +8,7 @@ Use [`install.cmd`](install.cmd) to set up a new WSL installation. Run without a
 
 - [`wsl-apt`](scripts/wsl-apt) - run `apt update`/`upgrade`/`install`/`remove`/`autoremove`/`autoclean`
 	- any package names given as arguments are treated as packages to `install`, except any prefixed with a `-` are treated as packages to `remove`
+- [`wsl-clipboard`](scripts/wsl-clipboard) - pipe stdin/stdout to set/read Windows clipboard
 - [`wsl-expose-filesystem`](scripts/wsl-expose-filesystem) - expose entire filesystem to all WSL instances at `/mnt/wsl/$WSL_DISTRO_NAME`
 - [`wsl-expose-ports`](scripts/wsl-expose-ports) - expose one or more ports within WSL to the outside world
 	- this sets up a port proxy and a Windows firewall rule for each exposed port, and removes previous port proxies and firewall rules

wsl/scripts/wsl-clipboard

@@ -0,0 +1,4 @@
+#!/bin/sh
+[ -t 0 ] && [ -t 1 ] && { >&2 echo Must pipe stdin/stdout to set/read Windows clipboard.; exit 1; }
+[ -t 0 ] || clip.exe
+[ -t 1 ] || powershell.exe -noprofile -command get-clipboard | tr --delete \\r