[LEDE-DEV] [PATCH] base-files: sysupgrade. Added the ability to use URL as source

[adron at yapic.net]

From: Sergey Sergeev <adron at yapic.net>

I did not encapsulate the logic in get_image() because too much code
(like dd if=...) expects to work with the file instead of url. And
use get_image would lead to repeated data reloads from url.

Signed-off-by: Sergey Sergeev <adron at yapic.net>
---
 package/base-files/files/sbin/sysupgrade | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index 2f441f8..4391e95 100755
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -101,6 +101,26 @@ EOF
 # prevent messages from clobbering the tarball when using stdout
 [ "$CONF_BACKUP" = "-" ] && export VERBOSE=0
 
+wget_if_URL(){
+	local sed_head='^.*\('
+	local url_pattern='\(https\?\|ftp\)://[^ ]*'
+	local sed_tail='\).*$'
+	local url=$(echo "$ARGV" | sed -ne "s#$sed_head$url_pattern$sed_tail#\1#p")
+	[ -z "$url" ] && return 1
+	rm -f /tmp/sysupgrade-URL.bin
+	wget "$url" -O "/tmp/sysupgrade-URL.bin" || {
+		echo "Wget return error $? for url '$url'"
+		echo "Exiting"
+		rm -f /tmp/sysupgrade-URL.bin
+		exit 1
+	}
+	ARGV=$(echo "$ARGV" | sed -e "s#$url_pattern#/tmp/sysupgrade-URL.bin#")
+	return 0
+}
+
+#if URL has been specified then downloading image file via wget
+wget_if_URL
+
 add_uci_conffiles() {
 	local file="$1"
 	( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
-- 
1.9.1