configure.py assumes "python" command exists

[Stephan Witt]

Am 27.12.2021 um 20:30 schrieb José Abílio Matos <jamatos at lyx.org>:
> 
> On Saturday, 25 December 2021 18.32.21 WET Scott Kostyshak wrote:
> > On Sun, Oct 31, 2021 at 12:58:19PM -0400, Scott Kostyshak wrote:
> 
> Hi Scott,
>   I find you choice of dates very convenient. :-)
> 
> https://journeys.dartmouth.edu/folklorearchive/2016/11/12/halloween-and-christmas/
> 
> “Why do programmers always mix up Halloween and Christmas?”
> “Because Oct 31 = Dec 25.”
> 
> > Bump.
> >
> > Scott
> 
> Regarding the problem at hand, as an example, my suggestion is to change:
> 
> \converter pdf4   pdf8  "python $$s/scripts/convert_pdf.py $$i $$o ebook"
> 
> to
> 
> \converter pdf4   pdf8  "$${python} $$s/scripts/convert_pdf.py $$i $$o ebook"
> 
> The idea is to use the converter code, e.g. the $$i $$o ..., and add there the substitution from $${python} to the python path that we have already determined in os::find_python.

I like your proposal.

Regarding the use of python calls in configure.py I’ve stolen your idea to use sys.executable and made a patch.
This avoids the warning '„LyX“ needs to be updated‘ (see my RFC mail thread) and lyx starts as usual if I install python3 at first (https://www.python.org/downloads/release/python-3101)

Stephan

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