[bug#64765] [PATCH] gnu: home: zsh: Also load enviroment in non-login shells

[Saku Laesvuori]

> >> Hello, this looks reasonable to me, only one question:
> >> Will ~/.guix-home/profile/etc/profile be sourced multiple times with
> >> duplicated search-path entries?  (eg: check 'env' in 'zsh' in 'zsh').
> >
> > Yes, but I don't think it causes any problems aside from adding useless
> > data to the environment. This could be prevented by exporting
> > GUIX_PROFILE_SOURCED=1 or something similar and only sourcing profiles
> > if it isn't set.
> 
> I doesn’t sound great though, and I’m sure it could break obscure
> things, like #include_next in C.
> 
> Is there a way this could be avoided?  (I’m not familiar with Zsh so I’m
> not offering to help; just looking for pending patches to apply.  :-))

It could be avoided properly by making guix-generated
profiles ensure that they can't be sourced multiple times
(e.g. [ -z "$GUIX_PROFILE_SOURCED" ] || return ; GUIX_PROFILE_SOURCED=1).
The specific problem I was facing was with running commands with ssh,
which the bash service seems to fix by sourcing /etc/profile from bashrc
when used via ssh. I'll send a patch for this ssh-specific solution but
I'm not sure if it's the best way to fix this.

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