hyprland-wiki/pages/Contributing and Debugging/_index.md

# Contributing guidelines

PR, code styling and code FAQs are [here](./PR-Guidelines)

For issues, please see
[the guidelines](https://github.com/hyprwm/Hyprland/blob/main/docs/ISSUE_GUIDELINES.md)

## Build in debug mode

### Required packages

`xcb` stuff, check with your local package provider.

`wayland` - of course.

_Arch_:

`yay -S gdb ninja gcc cmake libxcb xcb-proto xcb-util xcb-util-keysyms libxfixes libx11 libxcomposite xorg-xinput libxrender pixman wayland-protocols cairo pango seatd tomlplusplus`

(If any are missing hmu)

### Recommended, CMake

Install the VSCode C/C++ and CMake Tools extensions and use that.

I've attached a [example/launch.json](https://github.com/hyprwm/Hyprland/blob/main/example/launch.json)
that you can copy to your .vscode/ folder in the repo root.

With that, you can build in debug, go to the debugging tab and hit
`(gdb) Launch`.

### Custom, CLI

`make debug`

attach and profile in your preferred way.

### Meson

```console
meson setup build -Dbuildtype=debug
ninja -C build
```

### Nix

To build the package in debug mode, you have to override it like this:

```nix
hyprland.override {
  debug = true;
};
```

This code can go in the `package` attribute of the NixOS/Home Manager modules.

## Running

when running Hyprland in Debug mode, the config is
`~/.config/hypr/hyprlandd.conf` and the logs can be found at
`/tmp/hypr/[INSTANCE SIGNATURE]/hyprlandd.log`.

## Logs, dumps, etc

You can use the logs and the GDB debugger, but running Hyprland in debug compile
as a driver and using it for a while might give more insight to the more random
bugs.

When Hyprland crashes, use `coredumpctl` and then `coredumpctl info PID` to see
the dump. See the instructions below for more info about `coredumpctl`.

You can also use the amazing command

```sh
watch -n 0.1 "grep -v \"arranged\" /tmp/hypr/$HYPRLAND_INSTANCE_SIGNATURE/hyprland.log | tail -n 40"
```

for live logs. (replace `hyprland` with `hyprlandd` for debug builds)

### How do I get a coredump?

See [`ISSUE_GUIDELINES.md`](https://github.com/hyprwm/Hyprland/blob/main/docs/ISSUE_GUIDELINES.md).

## Nesting Hyprland

Hyprland can run nested in a window. For that, make sure you did the following:

- built in debug
- removed ALL `exec=` and `exec-once=` keywords from your debug config
  (`hyprlandd.conf`)
- set a resolution for `WL-1` and are not using `preferred`
- made sure no keybinds overlap (use a different mod for your keybinds altogether)

Once you launch, the display might be cropped. This can be fixed by setting the resolution for `WL-1` to
the exact dimensions of the window as reported by `hyprctl clients`.