rebuild docker image from specific step

Question

I have the below Dockerfile.

FROM ubuntu:14.04
MAINTAINER Samuel Alexander 

RUN          


        

Answer 1

If place ARG INCUBATOR_VER=unknown at top, then cache will not be used in case of change of INCUBATOR_VER from command line (just tested the build). For me worked:

# The rebuild starts from here
ARG INCUBATOR_VER=unknown
RUN INCUBATOR_VER=${INCUBATOR_VER} git clone https://github.com/apache/incubator-zeppelin.git