[Scons-users] What is the difference between Variables and Options

[Bill Deegan]

Sounds like (at the very least) the documentation needs to be improved on
this.

-Bill

On Sat, Jan 2, 2016 at 10:33 AM, Stefan Seefeld <stefan at seefeld.name> wrote:

> On 02.01.2016 12:55, William Blevins wrote:
> > Stefan,
> >
> > SCons parses commandline arguments in multiple stages, so the
> > commandline gets parsed multiple times by various parsers. I don't
> > remember the exact logic, but options and variables are disjoint
> concepts.
>
> Fine, that matches my understanding.
>
> >
> > The SCons Option implementation is simply a wrapper around optparse
> > (which will get replaced by argparse in the future).
> > The SCons variable implementation is simply a pair-wise key:value
> > ordering of non-option tokens.
>
> >
> > If you want to add variables to the help, then you may have to
> > interact with OptParse more directly.
>
> I had to struggle with this for a while, as the different bits of
> information I gathered seemed to contradict each other. Now I think I
> can make some sense out of this, assuming that the "Options()" function
> I was originally trying to use has in fact nothing to do with the
> "options" discussed above as conceptually different from "variables".
> Perhaps "Options()" is even deprecated in favour of "Variables()"
> precisely due to this potential confusion I just ran into. Am I right ?
>
> Thanks,
>         Stefan
>
> --
>
>       ...ich hab' noch einen Koffer in Berlin...
>
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