# Development setup

## Enter shell

```bash
nix develop
```

This shell includes:

- Rust: `cargo`, `rustc`, `rustfmt`, `clippy`, `rust-analyzer`
- Build tools: `pkg-config`, `gcc`, `clang`, `make`, `git`
- Input debug: `evtest`, `libinput`, `wev`
- CLI tools: `jq`, `rg`, `fd`, `jj`

## Recommended NixOS runtime config (uinput)

For `gotta-scroll-fast` (`gsfd`), you typically need `/dev/uinput`.

```nix
{
  boot.kernelModules = [ "uinput" ];

  # Optional: ensure module is available in initrd/system profile
  boot.extraModulePackages = [ ];

  services.udev.extraRules = ''
    KERNEL=="uinput", MODE="0660", GROUP="input"
  '';

  users.users.<your-user>.extraGroups = [ "input" ];
}
```

Then rebuild and re-login.

## Useful checks

```bash
ls -l /dev/uinput
id
sudo evtest
libinput debug-events
wev
```

## First run (project)

```bash
cargo run -p gsf-daemon -- --list-devices
cargo run -p gsf-cli -- tui
```
