Small script written by someone that outputs as a QR code whatever you have on your clipboard at the time

qr_clip.sh

#!/bin/bash
#
# This script will output a QR Code made with whatever you have loaded on your clipboard
# You need qrencode C Library and xclip for this script to work
#
function err {
	echo -e "[ERROR] in line ${BASH_LINENO[0]}"
	[[ $1 ]] && echo "[ MSG ] $1"
	exit 1
}

function printBold {
	echo -e "\n$(tput bold)\"$1\"$(tput sgr0)\n"
}

hash qrencode || err "qrencode not found."
hash xclip || err "xclip not found."

if [[ ! -z $1 ]]; then
	# if given, use arguments as target
	TARGET="$@"
else
	# per default, get target from clipboard.
	TARGET="$( xclip -selection c -o )" || err
	[[ ! -z $TARGET ]] || err "clipboard empty."
fi

printBold "$TARGET"

QRCODE="$( qrencode -t UTF8 "$TARGET" )" || err
echo "$QRCODE"

# invert block characters. resulting in a qr-code readable on a light background.
QRCODE="${QRCODE//' '/'0'}"  
QRCODE="${QRCODE//'█'/'1'}" 
QRCODE="${QRCODE//'▄'/'2'}" 
QRCODE="${QRCODE//'▀'/'3'}" 

QRCODE="${QRCODE//'3'/'▄'}" 
QRCODE="${QRCODE//'2'/'▀'}" 
QRCODE="${QRCODE//'1'/' '}" 
QRCODE="${QRCODE//'0'/'█'}"

# comment the previous block and uncomment the next one, when in need of
# block sized characters instead of whitespaces (e.g to paste to no-monospace environment).

#QRCODE="${QRCODE//'3'/'▄'}"
#QRCODE="${QRCODE//'2'/'▀'}"
#QRCODE="${QRCODE//'1'/'░'}" 
#QRCODE="${QRCODE//'0'/'█'}"
echo "$QRCODE"