use wget instead of ADD to download ns-3

This allows Docker to cache this step.
quic-interop · Aug 23, 2020 · 39c61cd · 39c61cd
1 parent 85c7fd9
commit 39c61cd
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/sim/Dockerfile b/sim/Dockerfile
@@ -1,10 +1,10 @@
 FROM ubuntu:20.04 AS builder
 
 RUN apt-get update && \
-  DEBIAN_FRONTEND=noninteractive apt-get install -y python3 build-essential cmake
+  DEBIAN_FRONTEND=noninteractive apt-get install -y python3 build-essential cmake wget
 
 ENV VERS 3.31
-ADD https://www.nsnam.org/release/ns-allinone-$VERS.tar.bz2 .
+RUN wget https://www.nsnam.org/release/ns-allinone-$VERS.tar.bz2
 RUN tar xjf ns-allinone-$VERS.tar.bz2 && rm ns-allinone-$VERS.tar.bz2
 RUN mv /ns-allinone-$VERS/ns-$VERS /ns3