Multi-Stage Dockerfile

Dockerfile

# MULTI STAGE BUILD
# start from building develop image
# and then run the compile
FROM aharonamir/dev-cpp:4.9 as builder
# install project specific dependencies
USER root
COPY ./dependencies/install-dependencies.sh /usr/
RUN chmod +x /usr/install-dependencies.sh

RUN apt-get update
RUN /usr/install-dependencies.sh

# Clean up APT when done.
RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

#copy all the code : use .dockerignore for unwanted files
WORKDIR /home/develop/project 
COPY . /home/develop/project/
# compile link and copy the bin with dependencies to /tmp/
# we need to do it as one RUN command since the products of the workdir are temp
# for this intermediate container (layer)
RUN cmake . \ 
    && make \
    && mkdir -p /tmp/dist \
    && mkdir -p /tmp/app \
    && cp `ldd build/bin/your_app | grep -v nux-vdso | awk '{print $3}'` /tmp/dist/ \
    && cp build/bin/your_app /tmp/app/



# now start from a lean image and copy all the needed bin/libs only
FROM ubuntu:xenial
# app
COPY --from=builder /tmp/dist/* /usr/lib/x86_64-linux-gnu/
COPY --from=builder /tmp/app/your_app /usr/

WORKDIR /usr

ENTRYPOINT ["./your_app"]