QR Code as vector not bitmap

A sim­ple hack to get a QR code as a vec­tor file,
sup­port­ing trans­parency and more suit­able for scal­ing and espe­cially rotat­ing.
qren­code only out­puts png.

INFO=$1
FILE=tmp.png
qrencode -o $FILE "$INFO"
autotrace -background-color=FFFFFF \
          -corner-threshold 100 \
          -corner-always-threshold 200 \
          -corner-surround 1 \
          -output-file=${FILE%%.*}.pdf $FILE

rm $FILE exit 0;