From [Lennart’s answer on systemd-devel][1]:
> fwupd.target should not list the various network management solutions,
> that is unnecessary, and ordering after network.target should be
> sufficient to achieve the same, in a generic fashion. i.e. network
> managers should order themselves before network.target, so that
> ordering yourself after that automatically orders you after all
> implementations at once...
So, remove the unneeded targets. As the service unit is not
installed/enabled, and instead called by a timer, the system will most
probably be online already.
[1]: https://lists.freedesktop.org/archives/systemd-devel/2020-March/044205.html
"Best practices for starting unit only if network is online"
This allows it to be refreshed anytime the daemon updates rather
than once a day by a systemd job.
As part of this change, remove the logging from `fwupdmgr` which
was only used for motd purposes.
Makes `fwupd-refresh.service` strictly opt-in.
Some distros are defaulting to all systemd services on and causing
more refreshes than desirable by default, especially when using
both `gnome-software` and `fwupd-refresh.service`
It turns out there is some bug in systemd v242 or less that runtime
directories can't be used. So only populate motd when we know that
we have a newer systemd
`fwupd-refresh.service` uses `DynamicUser=true` which causes systemd
to make `/var/cache/fwupd` a symlink to `/var/cache/private/fwupd`.
Individual units aren't allowed to access this directory, only the ones
with the directive. This means that `fwupd.service` stops working as
soon as a user tries to start `fwupd-refresh.service`.
The bug details are present in
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941360
Fixes Debian bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=921820
Introduce a new --log option to fwupdmgr that will log stdout to an argument.
If run under systemd, prefix that argument with $RUNTIME_DIRECTORY.
Add a new systemd unit and associated timer to regularly refresh metadata.
After the metadata refresh is complete, save the output to the motd location.
The timer and service are disabled by default and can be enabled by an admin.
