gistfile1.txt

#!/bin/sh

[ $# -ne 1 ] && { echo "Usage: $0 URL" >&2; exit 2; }

# I need '*.svg' so that open(1) does its thing. The following
# inserts the variable part *after* the file extension on macos:
#	svg=$(mktemp -t gist-XXXXXXXXX.svg)
#
f=$(python3 -c 'import tempfile; \
	print("{0}.svg".format(tempfile.NamedTemporaryFile(delete=False).name))')

echo "$f" >&2

qrencode -s 10 -l H -t SVG -o "${f}" "$1"

open -a safari "${f}"