Re: RFC: Add fallback path to get_datafile_dir

[Guy Harris <guy () alum mit edu>]

On Aug 29, 2011, at 11:48 AM, Joerg Mayer wrote:

> On Mon, Aug 29, 2011 at 11:38:55AM -0700, Guy Harris wrote:
> > > as the problem recently popped up how to load auxillary files in the source
> > > directory that have not been installed to their final paths, I've created a
> > > patch that will add a fallback directory path to get_datafile_dir.
> > > So far get_datafile_dir would check wether some magic variable were set to
> > > locate generated (i.e. compiled) stuff inside the build dir instead of the
> > > install dir. This patch allows to override this behaviour to search in the
> > > specified directory relative to the source dir.
> >
> > So this is for the case where the build directory isn't the source directory, and you want to run Wireshark from the 
> > build directory?
>
> Correct. I think I haven't built Wireshark in tree for a few years.

It appears the patch is trying to resolve two separate issues:

        1) running from the build directory when the build directory isn't the source directory;

        2) dealing with the source directory not being laid out the way the installation directory is laid out.

The first of those needs to be done *regardless* of whether there needs to be an extra directory inserted in the path 
if you're fetching data from the source directory; it's best done in init_progfile_dir() (and, on UN*X, *not* done if 
running with special privileges).

The second of those needs to be done *regardless* of whether the build and source directories are the same; it should 
probably be done similarly to how it's done for the plugin and Python directories. 
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