Improve building process to reduce building time for BESS and UPF (#54)

* Improve building process to reduce building time

* Update path for BESS dir in container

container_build.py

@@ -44,7 +44,7 @@
 
 IMAGE = os.getenv('IMAGE', 'registry.aetherproject.org/sdcore/bess_build') + ':' + os.getenv('TAG_SUFFIX', 'latest')
 BESS_DIR_HOST = os.path.dirname(os.path.abspath(__file__))
-BESS_DIR_CONTAINER = '/build/bess'
+BESS_DIR_CONTAINER = '/bess'
 BUILD_SCRIPT = './build.py'
 PLUGINS = []
 

env/Dockerfile

@@ -108,13 +108,12 @@ RUN apt-get update && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-WORKDIR /build/bess
+WORKDIR /bess
 COPY . .
 
 # Build DPDK testpmd (used in bessctl samples)
 RUN ./build.py dpdk && \
-    cp /build/bess/deps/dpdk-22.11.4/build/app/dpdk-testpmd /usr/local/bin/ && \
-    rm -rf /build/bess
+    cp /bess/deps/dpdk-22.11.4/build/app/dpdk-testpmd /usr/local/bin/
 
 ENV CCACHE_DIR=/tmp/ccache
 ENV CCACHE_COMPRESS=true