#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  copy [-n]
		  copy -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -n            remove newlines
		  -h, --help    show this message


		Copy data from STDIN to the X11 clipboard.


		Examples:

		  Copy numbers to clipboard:

		    $ seq 10 | copy


		  Copy string without newline:

		    $ echo 'with automatic newline' | copy -n
	EOF
}

for flag in "$@"; do
	case "$flag" in
		(--)
			break
			;;
		(--help)
			usage
			help
			exit
			;;
		(*)
			;;
	esac
done

TRIM=false
while getopts 'nh' flag; do
	case "$flag" in
		(n)
			TRIM=true
			;;
		(h)
			usage
			help
			exit
			;;
		(*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))

if [ "$TRIM" = true ]; then
	cat - | tr -d '\n' | xclip -sel clip
else
	cat - |              xclip -sel clip
fi