From d1317ea4ef22e0f2699f307b435ab067875c7819 Mon Sep 17 00:00:00 2001
From: Iru Cai <mytbk920423@gmail.com>
Date: Sat, 6 Apr 2019 00:14:18 +0800
Subject: add an option to clean the live USB

---
 buildlive | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/buildlive b/buildlive
index cebe132..30ac729 100755
--- a/buildlive
+++ b/buildlive
@@ -16,6 +16,7 @@ GRUBCFG_ONLY=0
 DOWNLOAD_ONLY=0
 UMOUNT_BOOT=0
 UMOUNT_ROOT=0
+CLEAN_USB=0
 
 . functions.sh
 
@@ -37,6 +38,7 @@ options:
   --root=<path>: set the path to put the live USB data files
   --boot <path>
   --boot=<path>: set the path to put the kernel and loader files
+  --clean: clean the old live USB files before installing
   --no-grub: do not install GRUB loader (still generate grub.cfg)
   --grubcfg: do not do real install, only generate grub.cfg file
   --downloadonly: only download the ISO files
@@ -98,6 +100,9 @@ do
 		--downloadonly)
 			DOWNLOAD_ONLY=1
 			;;
+		--clean)
+			CLEAN_USB=1
+			;;
 		*=*|-*)
 			usage
 			exit 1
@@ -162,6 +167,11 @@ if [ ! -z "$DEVNAME" ]; then
 	msg "Boot sector will be written to $DEVNAME"
 fi
 
+if [[ "$CLEAN_USB" = 1 ]]; then
+	msg "Cleaning old live USB files."
+	rm -rf "$KERNELDIR"/* "$DATADIR"/*
+fi
+
 for i in ${DISTROLIST[@]}
 do
 	process_isoinfo "$i"
-- 
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