pinnacle/README.md

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https://github.com/Ottatop/pinnacle/assets/120758733/c175ba80-9796-4759-92c3-1d7a6639b0c9

# Table of Contents
- [Info](#info)
    - [What is Pinnacle?](#what-is-pinnacle)
    - [Features](#features)
    - [Roadmap](#roadmap)
- [Dependencies](#dependencies)
- [Building](#building)
- [Running](#running)
- [Configuration](#configuration)
    - [Out-of-the-box configurations](#out-of-the-box-configurations)
    - [Custom configuration](#custom-configuration)
        - [Generating a config](#generating-a-config)
    - [More on configuration and the `metaconfig.toml` file](#more-on-configuration-and-the-metaconfigtoml-file)
        - [The `metaconfig.toml` file](#the-metaconfigtoml-file)
    - [Lua Language Server completion](#lua-language-server-completion)
    - [API references](#api-references)
- [Controls](#controls)
- [Feature Requests, Bug Reports, Contributions, and Questions](#feature-requests-bug-reports-contributions-and-questions)
- [Changelog](#changelog)

# Info
### What is Pinnacle?
Pinnacle is a Wayland compositor built in Rust using [Smithay](https://github.com/Smithay/smithay).
It's my attempt at creating something like [AwesomeWM](https://github.com/awesomeWM/awesome)
for Wayland.

> ### More video examples below!
> <details>
> 
> <summary>Click me</summary>
>
> All videos were recorded using [Screenkey](https://gitlab.com/screenkey/screenkey) and the Winit backend.
> 
> https://github.com/Ottatop/pinnacle/assets/120758733/5b6b224b-3031-4a1c-9375-1143f1bfc0e3
>
> https://github.com/Ottatop/pinnacle/assets/120758733/7a465983-2560-412e-9154-40b3dfd20488
>
> (This video is very crunchy in my attempts to get under the 10mb limit)
>
> </details>

### Features
- Tag system
- Left master stack, corner, dwindle, and spiral layouts from Awesome
- (Really scuffed) XWayland support
- Layer-shell support
- Configurable in Lua or Rust
- Is very cool :thumbsup:

### Roadmap
- TODO

# Dependencies
You will need:

- [Rust](https://www.rust-lang.org/) 1.74 or newer
    - If you want to use the Rust API, you will need Rust 1.75 or newer
- [Lua](https://www.lua.org/) 5.4 or newer, to use the Lua API
- Packages for [Smithay](https://github.com/Smithay/smithay):
  `libwayland libxkbcommon libudev libinput libgdm libseat`, as well as `xwayland`
    - Arch:
        ```sh
        sudo pacman -S wayland wayland-protocols libxkbcommon systemd-libs libinput mesa seatd xorg-xwayland
        ```
    - Debian:
        ```sh
        sudo apt install libwayland-dev libxkbcommon-dev libudev-dev libinput-dev libgdm-dev libseat-dev xwayland
        ```
    - NixOS: There is a really old [`shell.nix`](shell.nix) that may or may not work :skull:
- [protoc](https://grpc.io/docs/protoc-installation/), the Protocol Buffer Compiler, for configuration
    - Arch:
        ```sh
        sudo pacman -S protobuf
        ```
- [LuaRocks](https://luarocks.org/), the Lua package manager, to use the Lua API
    - Arch:
        ```sh
        sudo pacman -S luarocks
        ```
    - You must run `eval $(luarocks path --lua-version 5.4)` so that your config can find the API
      library files. It is recommended to place this command in your shell's startup script.

TODO: other distros

# Building
Build the project with:
```sh
cargo build [--release]
```

> [!NOTE]
> On build, [`build.rs`](build.rs) will: 
> - Copy Protobuf definition files to `$XDG_DATA_HOME/pinnacle/protobuf`
> - Copy the [Lua default config](api/lua/examples/default) and 
>   [Rust default config](api/rust/examples/default_config/for_copying) to
>   `$XDG_DATA_HOME/pinnacle/default_config/{lua,rust}`
> - `cd` into [`api/lua`](api/lua) and run `luarocks make` to install the Lua library to `~/.luarocks/share/lua/5.4`

# Running
> [!IMPORTANT]
> Before running, read the information in [Configuration](#configuration).

After building, run the executable located in either:
```sh
./target/debug/pinnacle     # without --release
./target/release/pinnacle   # with --release
```

Or, run the project directly with 
```sh
cargo run [--release]
```

See flags you can pass in by running `cargo run -- --help` (or `-h`).

# Configuration
Pinnacle is configured in your choice of Lua or Rust.

## Out-of-the-box configurations
If you just want to test Pinnacle out without copying stuff to your config directory,
run one of the following in the crate root:

```sh
# For a Lua configuration
cargo run -- -c "./api/lua/examples/default"

# For a Rust configuration
cargo run -- -c "./api/rust/examples/default_config"
```

## Custom configuration

> [!IMPORTANT]
> Pinnacle is under development, and there *will* be major breaking changes to these APIs
> until I release version 0.1, at which point there will be an API stability spec in place.

### Generating a config

Run the following command to open up the interactive config generator:
```sh
cargo run -- config gen
```

This will prompt you to choose a language (Lua or Rust) and directory to put the config in.
It will then generate a config at that directory. If Lua is chosen and there are conflicting
files in the directory, the generator will prompt to rename them to a backup before continuing.
If Rust is chosen, the directory must be manually emptied to continue.

Run `cargo run -- config gen --help` for information on the command.

## More on configuration and the `metaconfig.toml` file
Pinnacle is configured purely through IPC using [gRPC](https://grpc.io/). This is done through
configuration clients that use the [Lua](api/lua) and [Rust](api/rust) interface libraries.

As the compositor has no direct integration with these clients, it must know what it needs to run
through a separate file, aptly called the `metaconfig.toml` file.

To start a config, Pinnacle will search for a `metaconfig.toml` file in the first directory
that exists from the following:

1. The directory passed in through `--config-dir`/`-c`
2. `$PINNACLE_CONFIG_DIR`
3. `$XDG_CONFIG_HOME/pinnacle`
4. `~/.config/pinnacle` if $XDG_CONFIG_HOME is not defined

If there is no `metaconfig.toml` file in that directory, Pinnacle will start the default Lua config
at `$XDG_DATA_HOME/pinnacle/default_config/lua` (typically `~/.local/share/pinnacle/default_config/lua`).

Additionally, if your config crashes, Pinnacle will also start the default Lua config.

> [!NOTE]
> If you have not run `eval $(luarocks path --lua-version 5.4)`, Pinnacle will go into an endless loop of
> starting the default Lua config only for it to crash because it can't find the Lua library.

### The `metaconfig.toml` file
A `metaconfig.toml` file must contain the following entries:
- `command`: An array denoting the program and arguments Pinnacle will run to start a config.
- `reload_keybind`: A table denoting a keybind that Pinnacle will hardcode to restart your config.
- `kill_keybind`: A table denoting a keybind that Pinnacle will hardcode to quit the compositor.
    - The two keybinds above prevent you from getting locked in the compositor if the default config fails to start.

It also has the following optional entries:
- `socket_dir`: A directory that Pinnacle will place its IPC socket in (this defaults to `$XDG_RUNTIME_DIR`,
  falling back to `/tmp` if that doesn't exist).
- `[envs]`: A table of environment variables that Pinnacle will start the config with.

For the specifics, see the default [`metaconfig.toml`](api/lua/examples/default/metaconfig.toml) file.

## Lua Language Server completion
A [`.luarc.json`](api/lua/examples/default/.luarc.json) file is included with the default Lua config
and will set the correct workspace library files for use with the
[Lua language server](https://github.com/LuaLS/lua-language-server).

## API references
<b>Lua: https://pinnacle-comp.github.io/lua-reference/main.<br>
Rust: https://pinnacle-comp.github.io/rust-reference/main.</b>

> Documentation for other branches can be reached by replacing `main` with the branch you want.

# Controls
The following are the default controls in the [`default_config`](api/lua/examples/default/default_config.lua).
| Binding                                      | Action                             |
|----------------------------------------------|------------------------------------|
| <kbd>Ctrl</kbd> + <kbd>Mouse left drag</kbd> | Move window                        |
| <kbd>Ctrl</kbd> + <kbd>Mouse right drag</kbd>| Resize window                      |
| <kbd>Ctrl</kbd><kbd>Alt</kbd> + <kbd>q</kbd> | Quit Pinnacle                      |
| <kbd>Ctrl</kbd><kbd>Alt</kbd> + <kbd>c</kbd> | Close window                       |
| <kbd>Ctrl</kbd> + <kbd>Return</kbd>          | Spawn [Alacritty](https://github.com/alacritty/alacritty) (you can change this in the config)|
| <kbd>Ctrl</kbd><kbd>Alt</kbd> + <kbd>Space</kbd> | Toggle between floating and tiled |
| <kbd>Ctrl</kbd> + <kbd>f</kbd>     | Toggle fullscreen        |
| <kbd>Ctrl</kbd> + <kbd>m</kbd>     | Toggle maximized         |
| <kbd>Ctrl</kbd> + <kbd>Space</kbd> | Cycle to the next layout |
| <kbd>Ctrl</kbd><kbd>Shift</kbd> + <kbd>Space</kbd>                           | Cycle to the previous layout      |
| <kbd>Ctrl</kbd> + <kbd>1</kbd> to <kbd>5</kbd>                               | Switch to tag `1` to `5`          |
| <kbd>Ctrl</kbd><kbd>Shift</kbd> + <kbd>1</kbd> to <kbd>5</kbd>               | Toggle tag `1` to `5`             |
| <kbd>Ctrl</kbd><kbd>Alt</kbd> + <kbd>1</kbd> to <kbd>5</kbd>                 | Move a window to tag `1` to `5`   |
| <kbd>Ctrl</kbd><kbd>Alt</kbd><kbd>Shift</kbd> + <kbd>1</kbd> to <kbd>5</kbd> | Toggle tag `1` to `5` on a window |

# Feature Requests, Bug Reports, Contributions, and Questions
See [`CONTRIBUTING.md`](CONTRIBUTING.md).

# Changelog
See [`CHANGELOG.md`](CHANGELOG.md).