eureka/thumbnailer.sh

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#!/bin/sh
SRC=../www/img
SIZE=500
# transform path to /img/*/.thumb/
pathtrans() {
filename=$(basename "${1%.*}")
pathname="${1%/*}"
if [ ! -d ${pathname}/.thumb ]; then
mkdir ${pathname}/.thumb/
fi
echo "${pathname}/.thumb/${filename}.png"
}
# generate thumbnails in /img/*/.thumb/
resize() {
output=$(pathtrans $1)
if echo $1 | grep -e .gif -e .zip > /dev/null; then
return
fi
if [ ! -f ${output} ]; then
echo "Stripping metadata from $1"
convert "$1" -strip "$1"
echo "Generating thumbnail for $1"
convert "$1" -strip -auto-orient -resize ${SIZE} -dither FloydSteinberg -colors 16 ${output}
fi
}
if [ -z "$1" ]; then
echo "usage: $0 [build|clean]"
else
case $1 in
"build")
echo "Updating thumbnails cache"
for x in $(find ${SRC}/*/*); do resize "$x"; done;;
"clean")
echo "Cleaning thumbnails cache"
rm -rf ${SRC}/*/.thumb
echo "Cleaned";;
esac
fi