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Re: Defining variables in the caller's environment (was: ERR_RETURN ignored in 'if' in a source'd file [FIXED])

X-seq: zsh-users 30265
From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: Zsh-Users List <zsh-users@xxxxxxx>
Subject: Re: Defining variables in the caller's environment (was: ERR_RETURN ignored in 'if' in a source'd file [FIXED])
Date: Tue, 20 May 2025 09:12:46 -0700
Archived-at: <https://zsh.org/users/30265>
In-reply-to: <CAN=4vMrc9u4NBEuCBhfPQFt8qLSWxOENTwfVn3j10dAB_JpsEQ@mail.gmail.com>
List-id: <zsh-users.zsh.org>
References: <CAGdYchvkvCTV0HQ1RqTCP8pTX8pDbc6+P=5mrPq3UGiUfeODzw@mail.gmail.com> <CAN=4vMrc9u4NBEuCBhfPQFt8qLSWxOENTwfVn3j10dAB_JpsEQ@mail.gmail.com>

On Tue, May 20, 2025 at 3:52 AM Roman Perepelitsa
<roman.perepelitsa@xxxxxxxxx> wrote:
>
> In Zsh 5.10 and above, $( ... ) can be replaced with ${ ... } to avoid forking.
>
>     function define-vars() {
>       local -A var1=("$1" "$2")
>       local -i var2=42
>       typeset -p -- var1 var2
>     }

Also
  eval ${ define-vars 'x' 'y $ z' }

Which is an idiom in use for many years, e.g.
  eval $(ssh-agent)

References:
- Defining variables in the caller's environment (was: ERR_RETURN ignored in 'if' in a source'd file [FIXED])
  - From: Philippe Altherr
- Re: Defining variables in the caller's environment (was: ERR_RETURN ignored in 'if' in a source'd file [FIXED])
  - From: Roman Perepelitsa

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