From: Ferenc Engard <ferenc@...>
Date: 2004-05-28T12:05:06+09:00
Subject: Re: absolute location of a script file?

Joel VanderWerf wrote:
> 
> Ferenc Engard wrote:
> > Hi all,
> >
> > I have a library-like script, which can be used from many apps, from
> > many directories. I need to get the absolute path of the (required)
> > script file, so, for example, I can always find a file which is in the
> > same directory where my library script is. Is there a way to do this?
> 
>  From within the script file itself, you can get it with
> 
>    File.expand_path(__FILE__)
> 
> So for instance, you might do
> 
>    abs_path = File.expand_path(__FILE__)
>    abs_dir = File.dirname(abs_path)
> 
> But that doesn't help if you access the script using
> 
>    require 'my-script'

Er, why not? I have made some experiments, so it seems that it is always
true that on the start of my (required) scriptfile, the
'File.expand_path(__FILE__)' always returns the absolute path to the
file, at least the following seems to work:

# start of my library script, which is included by other files...
module MOD_LIB
  SCRIPTDIR=File.split(File.expand_path(__FILE__))[0]
end
# ...

After that, I can use MOD_LIB::SCRIPTDIR to find files which are in the
same directory as the libary script itself. Or not?

Thanks for the help:
Ferenc