RE: Re[4]: How to write an execline helper in execline?

From: <ivanov.maxim_at_gmail.com>
Date: Mon, 17 Oct 2016 07:50:10 +0100

This executes script with a given set of env cars, what I was talking about is replacing placeholders in config with values from env vars.

What would look in a shell like

tpl() {
  eval “cat <<EOF
  $(cat)
  EOF”
}

tpl </etc/config.tpl >/etc/config

But safer 😊

From: Laurent Bercot
Sent: 16 October 2016 21:14
To: skaware_at_list.skarnet.org
Subject: Re[4]: How to write an execline helper in execline?

>Hi, slightly among the lines of this suggestion, is there anything to
>help templating files with a given set (or subset) of env vars? This
>would be nice addition for s6 overlay

  I can't think of anything simpler than

s6-envdir dir_containing_all_variable_definitions
multisubstitute
{
   import -u variable1
   import -u variable2
   import -u variable3
   ...
}
script_using_variables

  Is that the kind of thing you're looking for?

--
  Laurent

Received on Mon Oct 17 2016 - 06:50:10 UTC