fix: ensure data home exists before rules update

internal/utils/fetch.go

@@ -1,11 +1,14 @@
 package utils
 
 import (
+	"errors"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
+	"path"
 )
 
 func Download(src, dest string) error {
@@ -27,6 +30,17 @@ func Download(src, dest string) error {
 		return err
 	}
 
+	dir := path.Dir(dest)
+	fileInfo, err := os.Stat(dir)
+	if os.IsNotExist(err) {
+		if err = os.MkdirAll(dir, os.FileMode(0o755)); err != nil {
+			return err
+		}
+	} else if !fileInfo.IsDir() {
+		text := fmt.Sprintf("Rules file destination directory is a file: %s", dir)
+		return errors.New(text)
+	}
+
 	err = MoveFile(tempFile.Name(), dest)
 	if err != nil {
 		return err