How does bash-completion even get sourced without PS1?

[t184256]

bash-completion has a guard condition so it won't be sourced without PS1 being set

https://github.com/scop/bash-completion/blob/6009de8534cd24b71d0bfda479823abcc640e4b1/bash_completion.sh.in#L2

Indeed, on my system it doesn't get sourced, while adding PS1=something before {source} fixes that.

[scopatz]

You generally have PS1 in your env, even if it usused by xonsh

[t184256]

Great, but setting xonsh aside, should this library set it just in case?

[scopatz]

Yeah it probably should :)