copycat.sh

#!/bin/bash
if [[ "$1" == "-h" || "$1" == "-?" || "$1" == "--help" ]]; then
	(
	echo 'copycat: copy stdin or files specified on command line to Wayland and/or X clipboard'
	echo 'performs automatic mimetype detection like wl-copy via file under X'
	echo 'usage:'
	echo '    copycat: copy stdin to clipboard'
	echo '    copycat <-h|--help|-?>: display usage help'
	echo '    copycat <files...>: concatenate each file, then copy to clipboard'
	echo
	echo 'if $WAYLAND_DISPLAY is set, delegates to wl-copy'
	echo 'otherwise, uses xclip and file'
	echo 'similarly to cat, - may be specified as a filename to allow concatening stdin with files'
	) 1>&2
	exit 0
fi
if [ -n "$WAYLAND_DISPLAY" ]; then
	cat -- "$@" | wl-copy
	echo "copycat: copied to Wayland clipboard" 1>&2
else
	tmpfile=$(mktemp)
	cat -- "$@" > "$tmpfile"
	mime=$(file -b --mime-type "$tmpfile")
	xclip -t "$mime" -selection clipboard "$tmpfile"
	rm "$tmpfile"
	echo "copycat: copied to X clipboard, detected mimetype $mime" 1>&2
fi