Loading application variables

Pupeno <>
Sun Jun 11 14:42:43 CEST 2006


On Sun, 2006-06-11 at 14:22 +0200, Ulf Wiger wrote: 
> Den 2006-06-11 14:06:50 skrev Pupeno <>:
> Well, you can also set environment variables via the command line, e.g.
> 
> erl -miselfu echoTCPPort 7 ...

If I was running erl myself I would just run 

erl  -config /usr/local/etc/miselfu/miselfu.config

and then application:start(miselfu). just works. But the thing is that I
am not running erl myself, Emacs is. And although I can customize the
command line, I don't want to always load the config file, I may not be
codding miselfu itself.


> but in order for them to actually take, you also need to load the miselfu  
> application, using application:load(miselfu). If your variables are  
> defined in a .config file, I thought it would be easier to write a small  
> erlang function that reads it and sets them appropriately. It can be done  
> in less than 10 lines of code.

I understand it can be written, but since nobody has written it yet I
suppose people work in other ways, if so, I want to learn that instead
of writing a function (that doesn't belong to my project anyway, but to
Erlang itself).

> I personally try to use builder

What is builder ?

> in situations like that. It builds a bash  
> script that loads all given applications, but doesn't start them (except  
> the mandatory kernel and stdlib), essentially so that one could fire up an  
> erlang shell, with the code path and all the environment variables set,  
> and then do initialization or debugging from the shell.

I think that solution is not quite what I need either.

Thank you.
-- 
Pupeno <> http://pupeno.com
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