# Running komorebi

`komorebi` is the daemon that tiles your windows, and `komorebic` is the command line you
control it with. This page covers starting and stopping the daemon, asking it what it is
doing, and reading its log.

## Getting the two programs

[Installing komorebi](../installation.md) covers NixOS, where the flake's module installs both
and starts the daemon with every Plasma session, and building them from source. In a checkout of
the repository, on Linux, `nix build` leaves them in `result/bin`, and `nix profile install .`
puts them on your `PATH`. Without nix, build them with the Rust toolchain that
`rust-toolchain.toml` selects:

```sh
cargo build --release --locked
export PATH="$PWD/target/release:$PATH"
```

With the NixOS module, the daemon is the user unit `komorebi.service`, which starts when you log
in to Plasma. `systemctl --user start komorebi` starts it again after a `komorebic stop`, and
`journalctl --user -u komorebi` shows what it wrote. Everything else on this page applies to it
as it is.

## Starting and stopping

[`komorebic start`](../cli/start.md) runs the `komorebi` on your `PATH` in the background,
and checks three seconds later that it is running. It tries three times. If `komorebi` has
not started by then, `komorebic start` runs it once more in the foreground and prints what
it wrote on its standard error, which explains why it did not start. When a `komorebi` is
running already, `komorebic start` does nothing.

`komorebi` manages the windows of the Plasma Wayland session it is started in: it connects
to KWin on the session bus and loads a script into it, so start it from a terminal in that
session. Outside a Plasma session it exits with an error that says what is missing, which
`komorebic start` prints. [`komorebic check`](checking-the-setup.md) says what is missing from the
session, and what is wrong with the configuration, without starting anything.

`--config` gives the daemon the `komorebi.json` to read
([Configuration](configuration.md) says where it looks otherwise), and
[`komorebic quickstart`](quickstart-and-autostart.md) writes one to start from:

```sh
komorebic start --config ~/mine.json
```

Everything after a `--` is passed to `komorebi`. `--fake-backend` runs it against an
in-memory desktop with one monitor and no windows instead of KWin, which is a way to try the
daemon and `komorebic` without a compositor:

```sh
komorebic start
komorebic start -- --log-level debug
komorebic start -- --fake-backend
```

[`komorebic stop`](../cli/stop.md) tells the daemon to stop. It brings back the windows it hid (the
back of a stack, [stacking windows](stacking-windows.md), and the windows behind a
[monocle](monocle.md)), removes the desktop they were hidden on, asks KWin to unload its script,
removes its socket and exits. Stopping the process with `SIGINT` or `SIGTERM` does the same.

## Key bindings

[Key bindings](keybindings.md) is the guide to key bindings, and to the NixOS module's
options for them; this section is a summary for a daemon started by hand.

komorebi reads key bindings from a file in the format of skhd, whkd or sxhkd. The daemon
looks for `skhdrc`, `whkdrc` or `sxhkdrc` in `~/.config/komorebi` (or in
`$KOMOREBI_CONFIG_HOME`) and takes the first it finds; `--keybindings FILE` names another,
with `--keybindings-format skhd|whkd|sxhkd` when its name does not end with one of those.
The daemon registers the keys with KDE itself and runs the command of each press:

```sh
komorebic start -- --keybindings ~/dotfiles/skhdrc
```

KDE can also run a binding with no komorebi process, as a static shortcut that shows in System
Settings: [`komorebic hotkeys compile`](../cli/hotkeys-compile.md) writes those, and
`--mode auto` writes every binding that can be one. Give the daemon the same mode, so that it
leaves those bindings to KDE:

```sh
komorebic hotkeys compile --mode auto
komorebic start -- --keybindings-mode auto
```

The daemon realizes the modes of an skhdrc (and the chains of an sxhkdrc that stay open)
itself: while a mode is active, only its keys are taken, and every other key reaches the
window as usual. The log says which mode the daemon is in after each change. A chord chain
of an sxhkdrc (`alt + w ; h`) works the same way: after `alt + w`, only the keys that can
come next and Escape are taken, until one of them is pressed or 3 seconds pass
(`--chord-timeout 1500` waits 1.5 seconds instead).

A binding that does something else in each application (skhd's `[ ... ]` list, whkd's
per-application list) takes its key only while an application it names has the focus, or
any application for a `*` or `Default` entry; everywhere else the key reaches the application.
A name matches the executable, the Wayland app id (`org.kde.konsole`) or the desktop entry of
the focused window, whatever the case. skhd and whkd name applications as macOS and Windows
do, so give the daemon the names they have on KDE:

```sh
komorebic start -- --app-alias firefox=firefox-esr,librewolf --app-alias Terminal=konsole
```

[`komorebic hotkeys state`](../cli/hotkeys-state.md) shows the keys komorebi has registered
with KDE and what the daemon's engine is doing (its mode, and the keys it holds), and
[`komorebic hotkeys reload`](../cli/hotkeys-reload.md) has the daemon read its key binding
file again. A daemon that is killed leaves its keys swallowed until it is started again;
`komorebic stop` gives them back, and so does
[`komorebic hotkeys release`](../cli/hotkeys-release.md), with or without a daemon, which the
NixOS module's unit runs after the daemon stops. When KWin restarts, the daemon registers the
keys again with the new KWin.

## Asking komorebi what it is doing

The daemon answers questions on its socket, and these commands print the answers:

- [`komorebic state`](../cli/state.md): every monitor, with its workspaces, their
  containers and the windows in them, as JSON.
- [`komorebic monitor-information`](../cli/monitor-information.md): the id, the name and
  the bounds of every monitor, as JSON.
- [`komorebic query`](../cli/query.md): one value, the answer to one question: the index of
  the focused monitor, workspace, container or window, the layout of the focused workspace,
  whether the focused container is a single window or a stack, or the version of the
  daemon.

```sh
komorebic query focused-workspace-index
komorebic state | jq '.monitors.elements[0].workspaces.elements[0].containers.elements | length'
```

[`komorebic retile`](../cli/retile.md) tiles the windows of every monitor again, which puts
a window that was moved by hand back on its tile.

When the daemon is not running, these commands fail: there is no socket to write to.

A program that wants to know what komorebi does without asking can subscribe to its
notifications instead ([Subscribing to notifications](subscribing-to-notifications.md)).

## The socket and the data directory

The daemon listens on `komorebi.sock` in its data directory, `$XDG_RUNTIME_DIR/komorebi`
(the local data directory, `~/.local/share/komorebi`, when there is no runtime directory).
[`komorebic data-directory`](../cli/data-directory.md) prints the directory, if it exists.

## The log

The daemon logs to its standard output and to a file a day in `~/.local/share/komorebi`
(`$XDG_DATA_HOME/komorebi` when that is set): `komorebi.log.YYYY-MM-DD`, with colors, and
`komorebi_plaintext.log.YYYY-MM-DD`, without. The day is the UTC date.

[`komorebic log`](../cli/log.md) follows the file of the current day, with colors, until
you press Ctrl-C. The `--log-level` of `komorebi` sets how much is logged: `error`, `warn`,
`info` (the default), `debug` or `trace`.

## Shell completions

[`komorebic completions`](../cli/completions.md) prints a completion script for bash,
elvish, fish, PowerShell or zsh:

```sh
komorebic completions fish > ~/.config/fish/completions/komorebic.fish
komorebic completions bash > ~/.local/share/bash-completion/completions/komorebic
```

## Every command

[`docs/linux/cli/start.md`](../cli/start.md) has a page for every `komorebic` command, generated from its
help with `just docgen`.