clean_unused_images.sh

#USAGE: sh clean_unused_images.sh

project_path='/Users/../../Projects/iOS/APP_IOS/' # Change to your project's path
assets_path=$project_path"Assets.xcassets" # asset's path

assets_name="${assets_path/$project_path/$(echo '')}"

printf "\e[92mGetting first images:\e[0m\n"
images=""
# Get Images from assets root directory
first_images=$(ls $assets_path | awk '/ *.imageset/ {print $0}')
for first_image in $first_images; do
    images+=" Assets.xcassets/$first_image"
done

# Get images from assets subdiretories
paths=$(ls -F $assets_path | grep / | awk '! / *.imageset/ {print $0}')

while [ "$paths" != "" ]; do
    old_paths=$paths
    paths=""
    for path in $old_paths; do
        new_image_path="$assets_path/$path"

        new_images=$(ls $new_image_path | awk '/ *.imageset/ {print $0}')
        if [ "$new_images" != "" ]; then
            for new_image in $new_images; do
                image_path="$new_image_path/$new_image"
                images+=" ${image_path/$project_path/$(echo '')}"
            done
        fi

        new_paths=$(ls -F $new_image_path | grep / | awk '! / *.imageset/ {print $0}')
        for new_path in $new_paths; do
            paths+=" $path/$new_path"
        done
    done
done

printf "\e[92mGetting unused images:\e[0m\n"

for image in $images; do
    image_name=$(echo $image | perl -pe 's/([^\/]*+\/)++//g and s/\.imageset//g')

    used_files=$(grep -R -l --exclude-dir=Assets.xcassets "$image_name" $project_path)
    if [ "$used_files" == "" ]; then 
        printf "\e[33m$image_name on PATH: $image is not used\e[0m\n"
        rm -rf $project_path/$image
        printf "$image was \e[91mREMOVED\e[0m\n"
    else
        printf "\e[92m$image_name is used\e[0m\n"
    fi
done