Re: [gentoo-alt] EROOT changing ?

[Alan Hourihane]

On Fri, 2010-11-05 at 23:48 +0000, Alan Hourihane wrote:
> On Thu, 2010-11-04 at 19:05 +0100, Fabian Groffen wrote:
> > On 04-11-2010 15:24:47 +0000, Alan Hourihane wrote:
> > > On Wed, 2010-11-03 at 20:38 +0000, Alan Hourihane wrote:
> > > > Hi all,
> > > >
> > > > I'm having a recent issue where has_version is getting EROOT set to ./
> > > > where normally for me it's set to /
> > > >
> > > > When doing the autotools check for LATEST_VERSION it's failing during
> > > > the ebuild, yet calling portageq directly works. And in all other cases
> > > > it works fine too, just this autotools check.
> > > >
> > > > I've traced it back to vartree.py and when it pulls in the value of
> > > > EROOT it's wrong, and fails the search.
> > > >
> > > > Anyone any clues where EROOT could be getting set to ./ instead of just
> > > > staying with / ?
> > >
> > > Any help ?
> >
> > well, only puzzledness.  I assume you don't have ROOT set.  Maybe
> > canonicalise() is being called somewhere, but why that would introduce
> > the . (which is wrong of course) is unclear to me.
>
> I don't have ROOT, EROOT or EPREFIX set in my environment, but.....
>
> I printed out EPREFIX and ROOT where EROOT is used in vartree.py and it
> says that EPREFIX is set to . and ROOT is /
>
> Why would EPREFIX get set to .

Ah ha....

Turns out it's this in const.py.

# pick up EPREFIX from the environment if set
if "EPREFIX" in os.environ:
        EPREFIX = os.path.normpath(os.environ["EPREFIX"])

If EPREFIX is "", then normpath turns EPREFIX into "."

Ouch.

Alan.