docker run there is an option to create a tty with
docker run -t ubuntu:18.04 ls --color=auto, which is great for getting colored output.
However, something like this is missing for
docker build. For instance:
$ cat Dockerfile FROM ubuntu:18.04 SHELL ["/bin/bash", "-c"] ENV TERM=xterm-256color RUN ls --color=auto $ docker build . // no colors
Is it possible to get colored output for RUN commands when building a docker image?