backup

#!/bin/sh

if (( $# < 2)); then
    echo "Usage: $0 status|exclude|include" path
    exit 1
fi

action=$1
target_path=$2

if [[ ! -e $target_path ]]; then
    echo "File not found: $target_path"
    exit 1
fi

xattr -pl com.apple.metadata:com_apple_backup_excludeItem "$target_path" >/dev/null 2>&1 && is_currently_excluded=1

case $action in
    status)
        if [[ $is_currently_excluded ]]; then
            echo "Item is excluded from backup"
        else
            echo "Item is not excluded from backup"
        fi
        ;;

    exclude)
        if [[ $is_currently_excluded ]]; then
            echo "Item is already excluded from backup"
        else
            xattr -w com.apple.metadata:com_apple_backup_excludeItem com.apple.backupd "$target_path"
            echo "Item is now excluded from backup"
        fi
        ;;

    include)
        if [[ $is_currently_excluded ]]; then
            echo "Item is now included in backup"
            xattr -d com.apple.metadata:com_apple_backup_excludeItem "$target_path"
        else
            echo "Item is already included in backup"
        fi
        ;;
esac