release_rootfs.sh

#!/bin/bash

set -e

CHECK_COUNT=0
MAX_RETRY=3

test -d ${TARGET_DIR} || mkdir -p ${TARGET_DIR}

urlencode() {
    # urlencode <string>
    local length="${#1}"
    for (( i = 0; i < length; i++ )); do
        local c="${1:i:1}"
        case $c in
            [a-zA-Z0-9.~_-]) printf "$c" ;;
            *) printf '%%%02X' "'$c"
        esac
    done
}

retrieve_rootfs_fileinfo()
{
	ROOTFS_TAG=$(urlencode release/${OFFICIAL_VERSION})
	ROOTFS_FILE=`curl -s ${ROOTFS_BASE_URL}/tag/${ROOTFS_TAG} | grep -e ".*download/${ROOTFS_TAG}" | sed -e 's|.*download\/.*\/\([^\"]*\).*$|\1|'`
	# Try to find a rootfs tarball from previous version
	if [ "$ROOTFS_FILE" == "" ]; then
		ROOTFS_TAG=$(urlencode release/${PREVIOUS_VERSION})
		ROOTFS_FILE=`curl -s ${ROOTFS_BASE_URL}/tag/${ROOTFS_TAG} | grep -e ".*download/${ROOTFS_TAG}" | sed -e 's|.*download\/.*\/\([^\"]*\).*$|\1|'`
	fi
	if [ "$ROOTFS_FILE" == "" ]; then
		echo "Cannot find root filesystem tarball"
		exit 1
	fi
	ROOTFS_FILE_MD5=$(echo $ROOTFS_FILE | sed -e 's/.*[0-9][0-9][0-9][0-9][0-9][0-9]-\([^\.]*\).*/\1/')
}

if [ "$ROOTFS_FILE_MD5" == "" ]; then
	retrieve_rootfs_fileinfo
fi

if [ ! -f $PREBUILT_DIR/$ROOTFS_FILE ]; then
	echo "Not found rootfs. Download it"
	wget ${ROOTFS_BASE_URL}/download/${ROOTFS_TAG}/${ROOTFS_FILE} -O $PREBUILT_DIR/$ROOTFS_FILE
fi

while :
do
	MD5_SUM=$(md5sum $PREBUILT_DIR/$ROOTFS_FILE | awk '{print $1}')
	if [ "$ROOTFS_FILE_MD5" == "$MD5_SUM" ]; then
		break
	fi

	echo "Mismatch MD5 hash. Just download again"
	wget ${ROOTFS_BASE_URL}/download/${ROOTFS_TAG}/${ROOTFS_FILE} -O $PREBUILT_DIR/$ROOTFS_FILE

	CHECK_COUNT=$((CHECK_COUNT + 1))

	if [ $CHECK_COUNT -ge $MAX_RETRY ]; then
		exit -1
	fi
done

cp $PREBUILT_DIR/$ROOTFS_FILE $TARGET_DIR/rootfs.tar.gz