snapcraft: prime only needed python bits for pyuefivars

[simondeziel]

It looks like the snapcraft python plugin does weird things as the uefivars part ended up bringing a lot of unneeded bits:

$ du -smc /snap/lxd/current/lib/python3.10/site-packages/*
1	/snap/lxd/current/lib/python3.10/site-packages/_distutils_hack
1	/snap/lxd/current/lib/python3.10/site-packages/distutils-precedence.pth
1	/snap/lxd/current/lib/python3.10/site-packages/google_crc32c
1	/snap/lxd/current/lib/python3.10/site-packages/google_crc32c-1.5.0.dist-info
1	/snap/lxd/current/lib/python3.10/site-packages/google_crc32c.libs
12	/snap/lxd/current/lib/python3.10/site-packages/pip
1	/snap/lxd/current/lib/python3.10/site-packages/pip-24.0.dist-info
2	/snap/lxd/current/lib/python3.10/site-packages/pkg_resources
1	/snap/lxd/current/lib/python3.10/site-packages/pyuefivars
1	/snap/lxd/current/lib/python3.10/site-packages/pyuefivars-0.1.dist-info
4	/snap/lxd/current/lib/python3.10/site-packages/setuptools
1	/snap/lxd/current/lib/python3.10/site-packages/setuptools-69.1.0.dist-info
1	/snap/lxd/current/lib/python3.10/site-packages/wheel
1	/snap/lxd/current/lib/python3.10/site-packages/wheel-0.42.0.dist-info
18	total

The other python bits we have are all under lib/python3 so I did some mangling to put pyuefivars there as well. Since pip/setuptools and wheel packages are only needed to install/update packages, I dropped them as unneeded bits.

Lastly, this is amd64/arm64 specific so I added the usual set of override-*.

This was tested locally to not break lxc config uefi.

[tomponline]

Thanks!

[tomponline]

How do u find out what it actually needs, go through the source?

[simondeziel]

Yeah, mostly by looking at the sources that has setup.py mention google_crc32c as the only dependency (which I'm not sure we even need for our use but it's tiny).

What prompted me into looking into this is the inflation of the snap ;)