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systemd: add prompt function to show systemd units' status (#7657)

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Co-authored-by: Marc Cornellà <marc.cornella@live.com>
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Sir Mobus Gochfulshigan Dorphin Esquire XXIII 2020-02-18 17:04:14 -05:00 committed by GitHub
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41
plugins/systemd/README.md
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@ -51,3 +51,44 @@ plugins=(... systemd)
You can use the above aliases as `--user` by using the prefix `scu` instead of `sc`.
For example: `scu-list-units` will be aliased to `systemctl --user list-units`.
### Unit Status Prompt
You can add a token to your prompt in a similar way to the gitfast plugin. To add the token
to your prompt, drop `$(systemd_prompt_info [unit]...)` into your prompt (more than one unit
may be specified).
The plugin will add the following to your prompt for each `$unit`.
```
<prefix><unit>:<active|notactive><suffix>
```
You can control these parts with the following variables:
- `<prefix>`: Set `$ZSH_THEME_SYSTEMD_PROMPT_PREFIX`.
- `<suffix>`: Set `$ZSH_THEME_SYSTEMD_PROMPT_SUFFIX`.
- `<unit>`: name passed as parameter to the function. If you want it to be in ALL CAPS,
you can set the variable `$ZSH_THEME_SYSTEMD_PROMPT_CAPS` to a non-empty string.
- `<active>`: shown if the systemd unit is active.
Set `$ZSH_THEME_SYSTEMD_PROMPT_ACTIVE`.
- `<notactive>`: shown if the systemd unit is *not* active.
Set `$ZSH_THEME_SYSTEMD_PROMPT_NOTACTIVE`.
For example, if your prompt contains `PROMPT='$(systemd_prompt_info dhcpd httpd)'` and you set the following variables:
```
ZSH_THEME_SYSTEMD_PROMPT_PREFIX="["
ZSH_THEME_SYSTEMD_PROMPT_SUFFIX="]"
ZSH_THEME_SYSTEMD_PROMPT_ACTIVE="+"
ZSH_THEME_SYSTEMD_PROMPT_NOTACTIVE="X"
ZSH_THEME_SYSTEMD_PROMPT_CAPS=1
```
If `dhcpd` is running, and `httpd` is not, then your prompt will look like this:
```
[DHCPD: +][HTTPD: X]
```

15
plugins/systemd/systemd.plugin.zsh
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@ -73,3 +73,18 @@ alias sc-mask-now="sc-mask --now"
alias scu-enable-now="scu-enable --now"
alias scu-disable-now="scu-disable --now"
alias scu-mask-now="scu-mask --now"
function systemd_prompt_info {
local unit
for unit in $@; do
echo -n "$ZSH_THEME_SYSTEMD_PROMPT_PREFIX"
[[ -n "$ZSH_THEME_SYSTEMD_PROMPT_CAPS" ]] && echo "${(U)unit}:" || echo "$unit:"
if systemctl is-active $unit &>/dev/null; then
echo -n "$ZSH_THEME_SYSTEMD_PROMPT_ACTIVE"
else
echo -n "$ZSH_THEME_SYSTEMD_PROMPT_NOTACTIVE"
fi
echo -n "$ZSH_THEME_SYSTEMD_PROMPT_SUFFIX"
done
}