how to reload .bashrc in dockerfile

Question

I am adding many things to the .bashrc in the Dockerfile which is necessary to execute some of the commands I want to run later in the Dockerfile,
I tired source .bashrc which does not work.
I tried using RUN /bin/bash -c --login ... but I get an error : mesg: ttyname failed: inappropriate ioctl for device

Answer 1

Each command in a Dockerfile creates a new temporary container, but without tty (issue 1870, discussed in PR 4955, but closed in favor of PR 4882).

The lack of tty during docker builds triggers the ttyname failed: inappropriate ioctl for device error message.

What you can try instead is running a wrapper script which in it will source the .bashrc.

Dockerfile:

COPY myscript /path/to/myscript
RUN /path/to/myscript

myscript:

#!/bin/bash
source /path/to/.bashrc
# rest of the commands    

Abderrahim points out in the comments:

In my case it was for nvm: it adds an init script to .bashrc therefore it wasn't usable in the Dockerfile context.
Ended up making an install script with it's dependent command.