[GRASS5] Environment variable listings...

[Glynn Clements]

Eric G. Miller wrote:

> > > Do you think people would find it useful if g.gisenv could list all of
> > > the known environment variables with a bit of information about them?
> > > 
> > > I've hacked my copy of g.gisenv to do this via an "-l" flag.  Output is
> > > like:
> > 
> > [snip]
> > 
> > > Seems it's never easy enough to figure out what environment variables
> > > are available for controlling behaviors...  Developer's can easily add
> > > to the struct array if there's a module that recognizes a certain
> > > variable and it's not yet "registered".
> > > 
> > > Opinions?
> > 
> > Adding this to g.gisenv might further confuse users regarding the
> > distinction between GRASS variables ($GISRC) and environment variables
> > (getenv()). It might be better to have a separate program.
> 
> These are GRASS variables (GISRC).  That's what g.gisenv manipulates.
> Normal environment variables are available with "env" command.  The
> proposal would only have those GRASS variables that are settable (and
> meaningful) in GISRC (~/.grassrc5).  "g.gisenv" manipulates that file
> directly with the "set=" argument.