Say I have this in a Dockerfile:
ARG FOO=1
ENTRYPOINT ["docker.r2g", "run"]
where I build the above with:
docker build -t "$tag" --build-arg FOO="$(date +%s)" .
is there a way to do something like:
ENTRYPOINT ["docker.r2g", "run", ARG FOO] // something like this
I guess the argument could also be passed with docker run instead of during the docker build phase?
You could combine ARG and ENV in your Dockerfile, as I mention in "ARG or ENV, which one to use in this case?"
ARG FOO
ENV FOO=${FOO}
That way, you docker.r2g can access the ${FOO} environment variable.
I guess the argument could also be passed with docker run instead of during the docker build phase?
That is also possible, if it makes more sense to give FOO a value at runtime:
docker run -e FOO=$(...) ...