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#!/bin/sh
#
# downloads xkcd comics
#
DOWNLOADDIR=$HOME/Ebooks/xkcd/
download_xkcd ()
{
NUMBER=$1
if [ `ls -1 | grep -c "^${NUMBER}_"` -gt 0 ] || [ $NUMBER -eq 404 ];
then
return 0
fi
# LINE_URL may contain link to larger comic at beginning
LINE_URL=`wget http://xkcd.com/$NUMBER/ -q -O - | grep "<img src=.*title=.*alt="`
URL=`echo $LINE_URL | cut -d '"' -f 2`
LINE_IMG=`echo $LINE_URL | sed 's/.*\(<img src=.*\)/\1/'`
#TITLE=`echo $LINE_IMG | cut -d '"' -f 4`
#ALT=`echo $LINE_IMG | cut -d '"' -f 6`
# url leads to an external site
if [ `echo $URL | grep -c "^http://imgs.xkcd.com/comics/"` -eq 0 ];
then
URL=`echo $LINE_IMG | cut -d '"' -f 2`
fi
FILENAME="${NUMBER}_`echo $URL | cut -d '/' -f 5`"
echo -n "Downloading xkcd #$NUMBER"
wget $URL -q -O $FILENAME
# does not work with jpg
#mogrify -comment "$TITLE" $FILENAME
echo "."
return 0
}
if [ ! -d $DOWNLOADDIR ];
then
echo "Creating download directory $DOWNLOADDIR"
mkdir -p $DOWNLOADDIR
fi
cd $DOWNLOADDIR
CURRENT=`wget http://xkcd.com/ -q -O - | grep "Permanent link to this comic: " | cut -d '/' -f 4`
for i in `seq $CURRENT -1 1`;
do
download_xkcd $i
done
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