script to link existing Batocera assets in EmulatorJS

#!/bin/bash

# April 25, 2024

# EmulatorJS (in CasaoS)

# original snippets
#  for x in *-video.mp4; do  ln -s "$x" "$(basename "$x" -video.mp4).mp4"; done
#  for x in *-marquee.png; do  ln -s "$x" "$(basename "$x" -marquee.png).png"; done

dirname=$(dirname $0)

# $$$ list needs to be an absolute path (for now)
list="$dirname/system.emuJS.list"
# https://stackoverflow.com/a/3063887/9983389
if [ ! -z "$1" ]; then
        list=$1
fi

# $$$ assumptions
config=/userdata/system/casaos/DATA/AppData/emulatorjs
roms=/userdata/roms

#pushd "$config/data"
pushd $roms

# https://stackoverflow.com/a/1689063/9983389
while read system; do
        if ([[ $system == \#* ]] || ([[ "x$system" == "x" ]])); then continue; fi

        echo "--------------------------------"
        echo "processing $system..."
        echo "--------------------------------"
        pushd $system

        echo -n "processing videos..."
        cd videos

        for video in *-video.mp4; do
                emuJSfile="$(basename "$video" -video.mp4).mp4"

                if [[ -e $emuJSfile ]]; then
#                       echo "$emuJSfile exists"
                        echo -n "."
                else
                        ln -s "$video" "$emuJSfile"
                fi
        done


        echo -n "processing images (logos)..."
        cd ../images

        for logo in *-marquee.png; do
                emuJSfile="$(basename "$logo" -marquee.png).png"

                if [[ -e $emuJSfile ]]; then
#                       echo "$emuJSfile exists"
                        echo -n "."
                else
                        ln -s "$logo" "$emuJSfile"
                fi
        done

        popd
done <$list

popd

echo
echo "DONE! Ready to retro! 🕹️"