apod_ch

#!/bin/bash
lastRan=$(head ran)
today=$(date +%j)
if [ $lastRan -ne $today ]; then

url=http://apod.nasa.gov/apod/
prefix=ch_
if [ $# -gt 0 ]; then
  url=$1
fi
imageurl=`curl $url 2> /dev/null | grep "<a href=\"image" | cut -d\" -f2`
filename=`echo $imageurl | cut -d/ -f3`
curl http://apod.nasa.gov/apod/$imageurl -o $filename 2> /dev/null
size=`identify $filename | cut -d' ' -f3`

cp $filename ./apod/$filename

convert chblank.png -resize $size tmp_resize_chblank.png
composite -gravity south tmp_resize_chblank.png $filename $prefix$filename

rm tmp*

#echo "Composite image created: $prefix$filename"
feh --bg-scale ./$prefix$filename

date +%j > ran
fi