Python2 is only needed for `libglade-convert`[1] which is a simple
script that converts old glade files into new glade files and for tests
and docs which we currently don't generate.
As Python2 is about to get EOLed and this is mostly a tool to migrate
old data, it shouldn't be built by default. With this change,
`xscreensaver` and `xsecurelock` don't depend on Python2 anymore.
[1] https://manpages.ubuntu.com/manpages/trusty/man1/libglade-convert.1.html
Changelog: https://github.com/nicolargo/glances/blob/v3.1.2/NEWS.rst#version-312
Note/TODO: Theoretically the IP test should work(?) now:
> Bugs corrected:
> - Error with IP Plugin : object has no attribute bug #1528
> - ip plugin empty interface bug #1509
but the test is still failing inside the Nix build sandbox.
The `keys.target` is used to indicate whether all NixOps keys were
successfully uploaded on an unattended reboot. However this can cause
startup issues e.g. with NixOS containers (see #67265) and can block
boots even though this might not be needed (e.g. with a dovecot2
instance running that doesn't need any of the NixOps keys).
As described in the NixOps manual[1], dependencies to keys should be
defined like this now:
``` nix
{
systemd.services.myservice = {
after = [ "secret-key.service" ];
wants = [ "secret-key.service" ];
};
}
```
However I'd leave the issue open until it's discussed whether or not to
keep `keys.target` in `nixpkgs`.
[1] https://nixos.org/nixops/manual/#idm140737322342384
This package explicitly depends on `python2` which will be EOLed at the
end of the year[1]. This package provides python bindings for `python2`,
however the latest release (also used by other distros) is from 2011[2]
and doesn't support v3. For instance, debian ships `vde2` without
`python2` support since Debian Jessie[3].
KVM and QEMU appear to build fine, also NixOS tests and ISO builds are
still functional.
By running `nix-review` against this change, only `xen` packages failed,
but those were already broken on master[4].
Finally it's also worth mentioning that the closure size of `vde2` drops
from 99.5M to 33.5M without `python2` according to `nix path-info -S -h`.
[1] https://pythonclock.org/
[2] https://github.com/virtualsquare/vde-2/releases/tag/vde-2
(vde.sourceforge.net redirects to this github page)
[3] https://packages.debian.org/en/jessie/vde2
[4] https://hydra.nixos.org/build/99185451, https://hydra.nixos.org/build/99187262
