On 23.12.2021 09:28, Russell VT wrote:
On Thu, Dec 23, 2021 at 12:52 AM Marco Atzeri > wrote:
On 23.12.2021 06:50, Russell VT wrote:
> On Tue, Dec 21, 2021 at 6:34 AM Achim Gratz <strom...@nexgo.de
<mailto:strom...@nexgo.de>> wrote:
>
>> Marco Atzeri writes:
>>> Without Python 3.9 installed python3 should link by default to the
>>> next in the line (likely 3.8)
>>
>> While python3 still defaults to python38 alternatives should
probably
>> prioritize 38 over 39?
>
>
> That's how I "fixed" mercurial on my own installation, as it was
> complaining about missing the "parsers" module, from inside the
Python 3.9
> libraries, IIRC.
Thanks for the report.
It is caused by:
$ head /usr/bin/hg -n 20
#!/usr/bin/python3
^^ default 3.9
....
libdir = '../lib/python3.8/site-packages'
^^ but really need 3.8
Thanks... python3 defaults to whatever you have "alternatives" set to...
looks like python's libdir doesn't quite obey those alternatives, though?
not in this case as Mercurial is not version agnostic
and it is setting its own specific "libdir"
$ cygcheck -l mercurial | grep "usr/lib" | head
/usr/lib/python3.8/site-packages/hgdemandimport/demandimportpy2.py
/usr/lib/python3.8/site-packages/hgdemandimport/demandimportpy3.py
..
No surprise is not working.
A simple workaround is:
Simpler (and more-complete) workaround is:
% /usr/sbin/alternatives.exe --set python3 /usr/bin/python3.8
my workaround solve the specific hg issue, until its repacking.
Alternatives can not support two different programs that need different
version
Cheers -
RVT
Regards
Marco
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