Re: [Jython-dev] JYTHONSTARTUP and PYTHONINSPECT

[Jim B. <jim...@py...>]

+1 on both of these updates, they look good and highly useful.

On Sat, Sep 8, 2018 at 12:13 PM, Jeff Allen <ja...@fa...> wrote:

> I'm remodelling jython.run along the lines of CPython main for clarity and
> conformity. CPython supports a couple of environment variables it has been
> easy to include. They seem useful, but are maybe not quite done in the
> Jython way. I'm not totally sure whether they should be JYTHONsomething or
> PYTHONsomething, or be registry entries instead, or as well. I'm canvassing
> opinions.
>
> Historically, our policy appears to be that configuration should be done
> via the registry (the registry files and the -D options). We *always* label
> registry items in the style "python.some.thing". We also honour some
> environment variables and mostly call them JYTHONsomething, except there's
> also PYTHONWARNINGS and PYTHONIOENCODING, I suppose because you want to see
> the same values as CPython (I think).
>
> I propose:
>
> JYTHONSTARTUP (registry python.startup) a file to run at the start of an
> interactive session. *J*YTHONSTARTUP because your script is unlikely to be
> the same for CPython. Precedence as with other variables.
>
> PYTHONINSPECT (registry python.inspect) if not empty, effectively sets the
> -i flag. (Any of these sources will *set* the flag, but none can turn it
> off.) It's called *P*YTHONINSPECT because setting it during execution
> should make us drop into interactive mode, instead of exiting, when the
> first SystemExit is raised. A script that does so may not be aware it's in
> Jython, so I favour the standard Python name.
>
> Jeff
>
> --
>
> Jeff Allen
>
>
>
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