Re: Python version dependencies in pkg

> On Sep 26, 2022, at 20:22, Kevin Oberman <rkoberman@gmail.com> wrote:
> 
> On Mon, Sep 26, 2022, 18:13 Dan Mahoney <freebsd@gushi.org <mailto:freebsd@gushi.org>> wrote:
> 
> 
>> On Sep 26, 2022, at 09:27, Kevin Oberman <rkoberman@gmail.com <mailto:rkoberman@gmail.com>> wrote:
>> 
>> On Mon, Sep 26, 2022 at 2:58 AM Dan Mahoney <freebsd@gushi.org <mailto:freebsd@gushi.org>> wrote:
>> All,
>> 
>> A quick question:
>> 
>> If a pkg depends on python, but not a specific version, it will simply pick a version to install (I guess, whatever version was the default when the pkg was built, 3.8 right now), correct?
>> 
>> If you have 3.9 installed, that will satifsfy dependencies, and it won't install python3.8, correct? Or are the dependent versions for interpretec languages in pkg locked to whatever the default is?
>> 
>> Assuming "any python will work", If you have 3.8 installed, and later install 3.9 -- is there any easy way to point your package at the new version as the new dependency, without deinstalling/reinstalling it?
>> 
>> -Dan
>> 
>> It will use the version specified as default in /usr/ports/Mk/bsd.default-versions.mk <http://bsd.default-versions.mk/>.
> 
> To be clear, I'm talking about pkg install, not port building.
> 
> So I understand -- that value is somehow baked in to the package tree somewhere?  Because pkg alone doesn't look at the ports tree on the installing machine (you do not need to have ports extracted to install packages), nor do I believe it looks at make.conf,
> 
> If so, where in pkg do I find the default version?  Is it somewhere in the repository that's fetched before I install any packages?
> 
> -Dan
> 
> You are correct.  But the packages are built using the same Makefile and the same defaults as when built from ports for the specified version of FreeBSD as if it was built from ports. The Mk files are updated with ports, so all packages change when the change is committed to the defaults file, though they will only take effect when the quarter changes unless you're using LATEST packages.

Okay, so in either the package file, or the repo file, is there a bit that says "whatever is the default" or that explicitly says "if there's not a python, install 3.8"?  

I realize I'm asking weird minute questions, but I'm noticing that across our fleet we have some blend of machines that are 3.7, 3.8, and 3.9, and trying to just remove 3.7 attempts to deinstall packages that would work with 3.8.

-Dan