xcassets_generator.sh

#!/bin/bash
createImagesets() {
for d in *; do
if [ -d $d ] ; then
            (cd $d; createImagesets)
fi
if [ -f $d ] ; then
            a=${d%@2x.*};
            dirname=$a".imageset";
            mkdir $dirname;
            mv $d $dirname;
fi
done
}
duplicateFiles() {
for d in *; do
if [ -d $d ] ; then
            (cd $d; duplicateFiles)
fi
if [ -f $d ] ; then
            a=${d%@2x.*};
            a=$a".png";
            cp $d $a;
fi
done
}
resize_non2xfiles() {
for d in *; do
if [ -d $d ] ; then
        (cd $d; resize_non2xfiles)
fi
if [ -f $d ] ; then
if [ $d == "${d/@2x.png/}" ] ; then
            width=`sips -g pixelWidth $d | tail -n1 | cut -d' ' -f4`;
            height=`sips -g pixelHeight $d | tail -n1 | cut -d' ' -f4`;
            name=`basename "$d"`;
            width=$(expr $width / 2);
            height=$(expr $height / 2);
            sips -Z $width $height $d;
fi
fi
done
}
create_content_json() {
for d in *; do
if [ -d $d ] ; then
        (cd $d; create_content_json)
if [ $d !=  "${d/.imageset/}" ]; then
            filename0=${d%.*};
            filename1=$filename0".png";
            filename2=$filename0"@2x.png";
echo "{\"images\":[{\"idiom\":\"universal\",\"scale\":\"1x\",\"filename\":\"$filename1\"},{\"idiom\":\"universal\",\"scale\":\"2x\",\"filename\":\"$filename2\"}],\"info\":{\"version\":1,\"author\":\"xcode\"}}" >> $d/Contents.json
fi
fi
done
}
createImagesets;
duplicateFiles;
resize_non2xfiles;
create_content_json;