[OE-core] [PATCH] oe-buildenv-internal: Fix finding build directory

[Richard Purdie]

On Tue, 2017-10-31 at 21:25 -0200, Otavio Salvador wrote:
> On Tue, Oct 31, 2017 at 9:16 PM, Burton, Ross <ross.burton at intel.com>
> wrote:
> > 
> > On 21 October 2017 at 13:06, Richard Purdie
> > <richard.purdie at linuxfoundation.org> wrote:
> > > 
> > > diff --git a/scripts/oe-buildenv-internal b/scripts/oe-buildenv-
> > > internal
> > > index e6cd141..abc5aff 100755
> > > --- a/scripts/oe-buildenv-internal
> > > +++ b/scripts/oe-buildenv-internal
> > > @@ -105,6 +105,11 @@ fi
> > > 
> > >  BITBAKEDIR=$(readlink -f "$BITBAKEDIR")
> > >  BUILDDIR=$(readlink -f "$BUILDDIR")
> > > +if [ -z "$BBPATH" ]; then
> > > +    BBPATH=$BUILDDIR
> > > +fi
> > > +
> > > +export BBPATH
> > 
> > This breaks the use-case of the user switching between build
> > directories as
> > re-executing oe-init-build-env doesn't change BBPATH.
> I know and that's why I asked for a warning! ;-)

My patch as it stands clearly can't go in.

Our options are:

a) make that codepath unconditional (which may be no bad thing) and 
   use BBPATH
b) use a specific variable for bitbake, the script sets BUILDDIR
c) start allowing the external code to set TOPDIR directly

I think I'm leaning towards a) or possibly c). I don't really like b).
I tried c) locally and its behaving oddly. a) is known to work.

Chris, any thoughts on the original intentions or what we should do
here?

Cheers,

Richard