On Apr 17, 12:09 am, Ondrej Certik <ond...@certik.cz> wrote:
> Hi,
>
> why is the notebook trying to execute "sage" that it finds in the
> path, rather than another copy of the sage that it is running?
Because sage-env assures that the right sage script is called, see
below.
> The following patches fix that (for SPD):
>
> http://github.com/certik/spd_notebook/commit/f0d66f283c4f398927a7e60c...http://github.com/certik/spd_notebook/commit/43762487aaa0efdfc107b4e0...http://github.com/certik/spd_notebook/commit/d89a444326c723ac7cf993d5...http://github.com/certik/spd_notebook/commit/352be7322447fca9c6ee6845...
>
> so the fixes are easy, but my question is why it was done that way in
> the first place? The problem with that is that if the "sage" in path
> points to a different version of sage than I am using to run the
> notebook, then the wrong sage is going to be used.
Well, that is because you probably broke something with your
changes :). The "fix" you listed has been proposed in the past, but
was turned down since it isn't a bug per se. SPD is a different
story.
> I understand the motivation for this, if the second instance of Sage
> is run over ssh on a different machine. It then doesn't make sense to
> execute "SAGE_ROOT + '/sage'", since on the other machine it will most
> likely be a wrong path. But if I am running on the same machine, is
> there any rationale to call a different Sage?
It cannot happen since sage-env sets PATH and LD_LIBRARY_PATH so that
the sage script from SAGE_ROOT gets picked up, i.e. from sage-env
PATH="$SAGE_ROOT:$SAGE_LOCAL/bin:$PATH" && export PATH
If SAGE_ROOT is already set sage aborts:
> If there is, could I fix it by introducing a variable to notebook()
> that would control this?
Do you still want to do that? The fewer config options there are the
better it is ;)
> Thanks,
> Ondrej
Cheers,
Michael
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