# Usage

## Basic Shell

The absolute minimum to get started:

```nix
let
  # make sure to add 
  #  inputs.devshell.url = "gitlab:rensa-nix/devshell?dir=lib";
  # to your inputs
  devshell = inputs.devshell.lib { inherit pkgs; };
in
  devshell.mkShell {}
```

That's it. You've got yourself a shell. Not very exciting, but it works.

## Adding Packages

Want some tools? Throw them in:

```nix
devshell.mkShell {
  packages = [ pkgs.hello pkgs.git pkgs.nodejs ];
}
```

## Environment Variables

Set some env vars (because who doesn't love those):

```nix
devshell.mkShell {
  env = {
    HELLO.value = "world";
  };
}
```

## Shell Hooks

Run stuff when entering the shell:

```nix
devshell.mkShell {
  enterShellCommands."hello".text = ''
    echo "Welcome to the devshell!"
    echo "Current directory: $PWD"
  '';
}
```

## Putting It All Together

A more realistic example:

```nix
devshell.mkShell {
  packages = [ pkgs.nodejs pkgs.yarn pkgs.git ];
  
  env = {
    NODE_ENV.value = "development";
    API_URL.value = "http://localhost:3000";
  };
  
  enterShellCommands."enter".text = ''
    echo "🚀 Development environment ready!"
    node --version
  '';
}
```

## Need More Features?

For additional functionality, import modules:

```nix
devshell.mkShell {
  imports = [ some-module.devshellModule ];
  # your config...
}
```

Check out [available modules](./integrations.md) for things like automatic file
generation, dev tools and more.