qr

#!/usr/bin/env fish
# Generate a QR code from a file or input.
# With -w or --wifi flag, generate a qr code to connect to the current wifi network with the provided password.

argparse -n qr 't/text=' 'w/wifi=' -- $argv

if set -q _flag_w
    # format should be:
    # WIFI:T:WPA;S:ssid;P:password;;
    echo "w/wifi flag is not yet implemented."
    exit 1
end

set stdin (if not set -q _flag_t; and test "$argv[1]" = '-'; echo -n "yes"; end)

set head (if test "$stdin" = "yes"
    c | head -1 -
else
    if set -q _flag_t
        echo $_flag_t[1]
    else
        head -1 $argv
    end
end)

set append (string sub -l 16 $head | string replace --all --regex '[^a-zA-Z0-9]' '-')
set infile (mktemp --suffix=.$append.txt)
set outfile (mktemp --suffix=.$append.png)

if test "$stdin" = "yes"
    cat >$infile
else if set -q _flag_t
    echo "$_flag_t" >$infile
else
    cat $argv >$infile
end

qrencode -r $infile -o $outfile -s 5
and open $outfile
rm $infile $outfile