From bc9ec9a87e2dae96b4c818d12d2c21bec421b44d Mon Sep 17 00:00:00 2001
From: Alex Kaplan <kaplan2539@gmail.com>
Date: Sat, 12 Sep 2015 13:53:04 -0700
Subject: [PATCH] chip-update-firmware.sh: added option -u to delete cache

---
 chip-update-firmware.sh | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/chip-update-firmware.sh b/chip-update-firmware.sh
index 6a79242..3e2ae7a 100755
--- a/chip-update-firmware.sh
+++ b/chip-update-firmware.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 FW_DIR="$(pwd)/.firmware"
 FW_IMAGE_DIR="${FW_DIR}/images"
-S3_URL="https://s3-ap-northeast-1.amazonaws.com/stak-images/firmware/chip/stable/5/images"
+S3_URL="https://s3-ap-northeast-1.amazonaws.com/stak-images/firmware/chip/stable/latest"
 
 function require_directory {
 	if [[ ! -d "${1}" ]]; then
@@ -11,11 +11,29 @@ function require_directory {
 
 function cache_download {
 	if [[ ! -f "${1}/${2}" ]]; then
-		wget -P "${FW_IMAGE_DIR}" "${S3_URL}/${2}" ||
+    
+    LATEST_URL="$(wget -q -O- ${S3_URL})"
+		wget -P "${FW_IMAGE_DIR}" "${LATEST_URL}images/${2}" ||
 			exit 1
 	fi
 }
 
+
+while getopts ":u" opt; do
+  case $opt in
+    u)
+      echo "updating cache"
+      if [[ -d "$FW_IMAGE_DIR" ]]; then
+        rm -rf $FW_IMAGE_DIR
+      fi
+      ;;
+    \?)
+      echo "Invalid option: -$OPTARG" >&2
+      exit 1
+      ;;
+  esac
+done
+
 require_directory "${FW_IMAGE_DIR}"
 cache_download "${FW_IMAGE_DIR}" rootfs.ubi
 cache_download "${FW_IMAGE_DIR}" sun5i-r8-chip.dtb