From 8d25681c55600d935bb612eb3eb8a6e75d0b04a3 Mon Sep 17 00:00:00 2001
From: Michael Maroszek <maroszek@gmx.net>
Date: Mon, 10 Jun 2024 11:33:09 +0200
Subject: [PATCH] ubuntu uses dash which does not support string manipulation
 like bash does

---
 Dockerfile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 8139994..17af27c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -78,8 +78,8 @@ USER $USER_UID:$USER_GID
 RUN \
     cd ~ && \
     export RUTOS_FILE=RUTX_R_GPL_${RUTOS_VERSION}.tar.gz && \
-    export RUTOS_SHORT_VERSION=${RUTOS_VERSION//0} && \
-    wget https://firmware.teltonika-networks.com/${RUTOS_SHORT_VERSION:1}/RUTX/${RUTOS_FILE} && \
+    export RUTOS_SHORT_VERSION=$(echo $RUTOS_VERSION | sed 's/0//g' | sed 's/^\.//') && \
+    wget https://firmware.teltonika-networks.com/${RUTOS_SHORT_VERSION}/RUTX/${RUTOS_FILE} && \
     echo "${RUTOS_CHECKSUM} ${RUTOS_FILE}" | md5sum -c --status && \
     tar -xf ${RUTOS_FILE} && \
     rm ${RUTOS_FILE}