[erlang-questions] recommended ways to pass config to a dep app

Max Lapshin <>
Fri Nov 16 16:40:10 CET 2012


Thank you, guys, a lot, but I'm not going to return to releases =)

erlyvideo is just a plain unix software, like apache or sendmail, that is
installed by people, that are hearing about erlang for the first time.

They can modify only one file in /etc/, so I need to read it before
startup. But there may not be this file, so I need to look for in in other
place.

I really don't see any use in releases for me, so my way of configuring
applications inside erlang node is very, very convenient and it is
_working_. Working in  _my practice_.


On Fri, Nov 16, 2012 at 7:30 PM, Garrett Smith <> wrote:

> On Fri, Nov 16, 2012 at 9:19 AM, Max Lapshin <>
> wrote:
> >
> >>
> >> IMO application:start/1 is also a bad smell outside dev/test modes.
> >> When you deploy as an Erlang release, applications are started by the
> >> init system process.
> >
> > I've tried to use releases in erlyvideo for a year and totally refused
> from
> > then and I don't see even a single reason for me to return back to them.
> So,
> > there is nothing bad in application:start/1, it is a good way to deploy
> and
> > launch system.
>
> Understood. But there is a payoff in getting this to work. Understood
> though :)
>
> I want to set aside some time to check out Eric Merrit's relcool (I
> came up with the name :)
>
> https://github.com/erlware/relcool
>
> > There is a nice startup function now in erlyvideo, that does all setup
> > (which differs for runtime and for tests), it loads
> > all data from config file.
>
> Reinventing the wheel, but that's cool - it's not a complicated wheel.
>
> > application config file is a bad place for configuring your application,
> > because it generates nowadays from app.src and exists somewhere in
> > /usr/lib/...
> >
> > configuration file lives in /etc/
>
> You're confused. App config has nothing to do with app.src and
> certainly lives in /etc/
>
> It's the file you pass here:
>
> erl -config CONFIG
>
> Garrett
>
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