Walker - A Modern Application Launcher

A fast, customizable application launcher built with GTK4 and Rust, designed for Linux desktop environments. Walker provides a clean, modern interface for launching applications, running commands, performing calculations, and more.

GitBook Documentation/Wiki

Features

The following Elephant providers are implemented by default:

• Desktop Applications: Launch installed GUI applications
• Calculator: Perform mathematical calculations with = prefix
• File Browser: Navigate and open files with / prefix
• Command Runner: Execute shell commands
• Websearch: Search the web with custom-defined engines
• Clipboard History: Access clipboard history with : prefix
• Symbol Picker: Insert special symbols with . prefix
• Provider List: Switch between providers with ; prefix
• Menu Integration: Create custom menus with elephant and let walker display them
• Dmenu: Your good old dmenu ... with seamless menus!
• Arch Linux Packages: Search through available packages (official and aur), install or delete a target! List all exlusively installed packages.
• Todo List: create simple todo items with basic time tracking, scheduling and notifications
• Bookmarks: manage bookmarks, open with specified browsers, assign categories and import bookmarks from browsers
• Bluetooth: basic bluetooth management
• Niri Actions: list niri actions
• Niri Sessions: create stored sets of workspaces/apps
• Bitwarden/1Password: access your passwords
• Wireplumber: handle sound input/output
• Snippets: access text-snippets
• Windows: list and focus opened windows

Installation

Build from Source

# Clone the repository
git clone https://github.com/abenz1267/walker.git
cd walker

# Build with Cargo
cargo build --release

# Run Walker
./target/release/walker

Dependencies

• GTK4 (version 4.6+)
• gtk4-layer-shell
• Protocol Buffers compiler
• cairo
• poppler-glib
• make sure elephant is running before starting Walker

elephant.url = "github:abenz1267/elephant";

walker = {
  url = "github:abenz1267/walker";
  inputs.elephant.follows = "elephant";
};

imports = [inputs.walker.homeManagerModules.default];

programs.walker.enable = true;

imports = [inputs.walker.nixosModules.default];

programs.walker.enable = true;

home.packages = [inputs.walker.packages.<system>.default];

environment.systemPackages = [inputs.walker.packages.<system>.default];

programs.walker = {
  enable = true;
  runAsService = true; # Note: this option isn't supported in the NixOS module only in the home-manager module

  # All options from the config.toml can be used here https://github.com/abenz1267/walker/blob/master/resources/config.toml
  config = {
    theme = "your theme name";
    placeholders."default" = { input = "Search"; list = "Example"; };
    providers.prefixes = [
      {provider = "websearch"; prefix = "+";}
      {provider = "providerlist"; prefix = "_";}
    ];
    keybinds.quick_activate = ["F1" "F2" "F3"];
  };

  # Set `programs.walker.config.theme="your theme name"` to choose the default theme
  themes = {
    "your theme name" = {
      # Check out the default css theme as an example https://github.com/abenz1267/walker/blob/master/resources/themes/default/style.css
      style = " /* css */ ";

      # Check out the default layouts for examples https://github.com/abenz1267/walker/tree/master/resources/themes/default
      layouts = {
        "layout" = " <!-- xml --> ";
        "item_calc" = " <!-- xml --> ";
        # other provider layouts
      };
    };
    "other theme name" = {
        # ...
    };
    # more themes
  };
};

nix.settings = {
  extra-substituters = ["https://walker.cachix.org" "https://walker-git.cachix.org"];
  extra-trusted-public-keys = ["walker.cachix.org-1:fG8q+uAaMqhsMxWjwvk0IMb4mFPFLqHjuvfwQxE4oJM=" "walker-git.cachix.org-1:vmC0ocfPWh0S/vRAQGtChuiZBTAe4wiKDeyyXM0/7pM="];
};

Usage

Basic Usage

Make sure elephant is running and you have providers installed. elephant-providerlist and f.e. elephant-desktopapplications.

Launch Walker with walker.

In order to improve startup performance, run a Walker service with:

walker --gapplication-service

If the service is running, you can either open Walker with:

walker

or for an even faster launch make a socket call, f.e. with openbsd-netcat:

nc -U /run/user/1000/walker/walker.sock

The downside of the socket call is that it does not handle any commandline options, so it's just a faster alternative to a simple walker call.

Niri workspace launch

When Walker runs as a service, it can watch Niri's event stream and open automatically whenever an empty workspace receives focus:

[niri]
launch_on_empty_workspace = true
launch_on_startup = true
cmd_on_esc = "niri msg action focus-workspace-previous"

launch_on_startup opens Walker once when the initially focused workspace is empty. cmd_on_esc is optional and only runs when Escape closes Walker after an automatic launch. Automatic launches are deferred while Niri's overview is open and rechecked when it closes.

Keybinds

The following modifier keys are valid: ctrl, alt, shift, super.

To get a full list of possible key values, look here: GDK key-values.

F.e. pub const GDK_KEY_semicolon: c_int = 59; means that ctrl semicolon would be a valid keybind.

Config

Configuration should be done in ~/.config/walker.

Check out the default config.

Theming

You can customize Walker's appearance by creating a custom theme. Checkout resources/themes/default for the default theme. Themes inherit the default theme by default, so if you just want to change the CSS, you can just create themes/yours/style.css.

You can customize rendering of list items for each provider individually, f.e. "item_files.xml" will define the layout for items sourced from the files provider.

Please refer to the GTK4 docs to checkout how to write *.xml files for GTK4.

You can set the default theme in your config.toml f.e. theme = "yours".

Contributing

Please do not make PRs to fix single typos. Fix all or nothing.

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.