Create WIFI QRCode

wifi-qrcode.sh

#!/usr/bin/env nix-shell
#! nix-shell -i bash -p qrencode

usage() {
    echo "Usage: $0 <SSID> <PASSWORD> [-e ENCODING] [-o OUTPUT] -- Passthrough to qrencode"
    echo "ENCODING defaults to WPA, but can also be WEP"
    echo "OUTPUT defaults to <SSID>.png"
}

ssid=""
password=""
output=""
# Parse arguments
while [[ "$#" > 0 ]]; do
    case $1 in
        -e|--encoding) encoding="$2"; shift 2;;
        -o|--output) output="$2"; shift 2 ;;
        -h) usage; exit 0 ;;
        --) shift; break ;;
        *)
            if [[ "$ssid" == "" ]]; then
                ssid="$1";
                shift; continue;
            fi
            if [[ "$password" == "" ]]; then
                password="$1";
                shift; continue;
            fi
            echo "Unexpected argument $1"
            usage; exit 1
            ;;
    esac
done

if [[ "$password" == "" ]]; then
    echo "Not enough arguments provided"
    usage; exit 1
fi
if [[ "$output" == "" ]]; then
    output="${ssid}.png"
fi

# Format: WIFI:T:<encoding>;S:<ssid>;P:<password>;;
qrstring="WIFI:T:${encoding};S:${ssid};P:${password};;"
OPTS=("$@" -o "$output" -s 20 -m 5 )
set -x
qrencode "${OPTS[@]}" "$qrstring"

annotate() {
    convert "$output" \
        -gravity SouthWest \
        -pointsize 40 \
        -fill black \
        "$@" \
        "$output"

}

#convert \
#    $output \
#    -gravity north \
#    -pointsize 40 \
#    -fill black \
#    -weight bold \
#    -draw "text -10,20 'SSID:'" \
#    $output

set -e

annotate \
    -gravity North \
    -pointsize 60 \
    -draw "text 0,20 'WiFi Credentials'"

annotate \
    -draw "text 5,50 'SSID: '"

annotate \
    -stroke black \
    -family "courier" \
    -draw "text 150,52 '$ssid'"

annotate \
    -draw "text 5,1 'Pass: '"

annotate \
    -stroke black \
    -family "courier" \
    -draw "text 150,3 '$password'"