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* fix error
* remove options that are no longer supported
* add missing options
* stop completion if an option `--help` or `--version` is supplied
[[[
zjs: a note for the reader:
zshcompsys(1) in the section about optspecs in _arguments says:
> Each of the forms above may be preceded by a list in parentheses of option names and argument num‐
> bers. If the given option is on the command line, the options and arguments indicated in parentheses
> will not be offered. For example, ‘(-two -three 1)-one:...' completes the option ‘-one'; if this ap‐
> pears on the command line, the options -two and -three and the first ordinary argument will not be
> completed after it. ‘(-foo):...' specifies an ordinary argument completion; -foo will not be com‐
> pleted if that argument is already present.
>
> Other items may appear in the list of excluded options to indicate various other items that should
> not be applied when the current specification is matched: a single star (\*) for the rest arguments
> (i.e. a specification of the form ‘\*:...'); a colon (:) for all normal (non-option-) arguments; and a
> hyphen (-) for all options. For example, if ‘(\*)' appears before an option and the option appears on
> the command line, the list of remaining arguments (those shown in the above table beginning with
> ‘\*:') will not be completed.
The intended effect of the change is to remove irrelevant completion matches from the completion.
tl;dr: (- : ) prevents further completion
]]]
Show hidden images in the completion results, but only if the current
word starts with ".", such that
- `machinectl clone <Tab>` will only offer non-hidden images, but
- `machinectl clone .<Tab>` will offer both hidden and non-hidden images
getopt allows non-ambiguous abbreviations, so backwards-compat is maintained, and
people can use --kill-who (or even shorter abbreviations). English is flexible,
so in common speach people would use both forms, even if "whom" is technically
more correct. The advantage of using the longer form in the code is that we
effectively allow both forms, so we stop punishing people who DTGCT¹, but still
allow people to use the spoken form if they prefer.
1. Do the gramatically correct thing
- Don't redefine helpers on every call
- Prefix helper names with main function name
- Adjust some helper names for consistency and convention adherance
The current code is not compatible with current dkr protocols anyway,
and dkr has a different focus ("microservices") than nspawn anyway
("whole machine containers"), hence drop support for it, we cannot
reasonably keep this up to date, and it creates the impression we'd
actually care for the microservices usecase.
Instead of having two different listings of machines, use an autoloaded
function that can be used by other shell completions in the future. It
will also allow editing a single file to change the way machinectl and
systemd-run completion for machines.
Things like -n to specify the lines to show with systemctl and
journalctl accepts syntax like:
journalctl -n4
systemctl -n14
Previously, typing `-nXX <tab>` where XX is a number, zsh would try to
complete an integer. Now it will see the XX and use the _journalctl_none
completion. This is also how any of the single letter options that take
arguments work as well.
_hosts_or_user_at_host was used by 6 different completions, and
previously was in all 6 of those files. I moved it out to its own file,
_sd_hosts_or_user_at_host. This will be autoloaded for use in other
completion functions. It also allows external completions to use this
function by simply calling _sd_hosts_or_user_at_host as in the systemd
completions.