fix(bash): unbound variable error with STARSHIP_PREEXEC_READY

[hanoii]

I am installing starship on a Docker container, and every now and then I see the following:

/dev/fd/63: line 24: STARSHIP_PREEXEC_READY: unbound variable

On this particular use case I installed https://github.com/junegunn/fzf on the container and then running:

/opt/fzf/install --help just gives the above error. Not sure why it. doesn't happen to every command.

I figured this is because STARSHIP_PREEXEC_READY can be non existent at some point. Exporting STARSHIP_PREEXEC_READY=true in the terminal fixes it.

I propose to account for this scenario in the bash-init script.

EDIT: I made a script to easily reproduce this:

Obviously is the set -u that triggers it

#!/usr/bin/env bash

set -u

sleep 1

[chipbuster]

👍

[davidkna]

Thanks for the fix @hanoii, and thanks for reviewing @chipbuster!