git install fails in Dockerfile

Question

I'm trying to pull the repository I'm working on while doing a docker build, so I followed this tutorial so I added in my Dockerfile

# this is our first build stage, it will not persist in the final image FROM ubuntu as intermediate  # install git RUN apt-get update \     apt-get upgrade \     apt-get install git  # add credentials on build RUN mkdir ~/.ssh && ln -s /run/secrets/host_ssh_key ~/.ssh/id_rsa  # make sure your domain is accepted RUN touch /root/.ssh/known_hosts RUN ssh-keyscan github.org >> /root/.ssh/known_hosts  RUN git clone [email protected]:my-repo/myproject.git  FROM ubuntu # copy the repository form the previous image COPY --from=intermediate /your-repo /srv/your-repo 

In my docker-compose.yml I added

secrets:   host_ssh_key:     file: ~/.ssh/id_rsa 

And I'm adding

secrets:   - host_ssh_key 

In one of the service.

Since this is only for my local use (I don't plan on deploying or using this for the production, I just want to test it out) it's fine to use it this way - if it'll work because currently the build fails at the git install stage with error

E: The update command takes no arguments

ERROR: Service 'web' failed to build: The command '/bin/sh -c apt-get update apt-get upgrade apt-get install git' returned a non-zero code: 100

What am I missing?

Answer 1

You are overanalyzing this. It's just a simple typo. Should be:

RUN apt-get update && \     apt-get upgrade -y && \     apt-get install -y git 

Those are 3 separate commands.