zsh: reintroduce pattern argument to uncached verbs
The systemctl completion previously made use of PREFIX as a pattern
argument to list-unit-files and list-units. This had the problem of
erroneously filtering the results that were stored in the cache, and
erroneously filtering results that might have been requested according
to the users configuration (e.g. _correct completer, certain
matcher-lists or tag-orders, etc.).
Unfortunately, the runtime of list-unit-files increases when no pattern
argument is provided, and systemctl show, used to filter those units,
can become unacceptably slow when provided with too many units to
describe.
Let's re-introduce the pattern argument to list-unit-files and
list-units where necessary in order to alleviate these bottlenecks
without poisining the cache. A 'use-pattern' style is introduced that
may be used to disable this behavior if it is undesired. We can still
expect that certain completions, like `systemctl start <TAB>` will be
slow, like before. To fix this we will need systemd to learn a more
efficient way of filtering the units than parsing systemctl show.
zsh: use sys_really_all_units for non-template names
The systemctl invocations used for these completions match the ones used
for the _sys_really_all_units parameter, so we should really just use
the cached parameter rather than recomputing the result.
ab9617a...
by
Lennart Poettering <email address hidden>
shutdown: handle gracefully if MD_LEVEL udev propery is not set
See: #28490
3c86805...
by
Lennart Poettering <email address hidden>
varlink: don't allocate fd control buffer on each read()
We'll need this on each read() again, hence let's just allocate this
once and then reuse it for subsequent read()s.
ci(lint): exclude `.in` files from ShellCheck lint
Exclude all `.in` files because they may contain unsupported syntax, and
they have to be preprocessed first. For example:
```sh
Error: SHELLCHECK_WARNING:
./src/rpm/systemd-update-helper.in:130:37: warning[SC1083]: This { is literal. Check expression (missing ;/\n?) or quote it.
```
