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To: zsh-users@zsh.org
From: Martin Vaeth <martin@mvath.de>
Subject: Re: convolutions
Date: Mon, 9 Nov 2015 08:50:03 +0000 (UTC)
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Ray Andrews <rayandrews@eastlink.ca> wrote:
> On 11/07/2015 09:17 AM, Martin Vaeth wrote:
>> In fact, envsubst was exactly written for the purpose of
>> *safely* expanding variables (and *only* that).
>>
> Sounds like precisely the thing. Alas, I tried it, and it strips the
> parameters but does not convert them unless each parameter is explicitly
> exported first

eval_gettext() from gettext.sh does it like this
(where $1 contains the text):

(export PATH `envsubst --variables "$1"`; envsubst "$1")