Rubus

A tree-walking interpreter for the Rubus programming language, bundled with rubed — a lightweight, terminal-based text editor built specifically for writing and running .rub files.

Overview

The Rubus ecosystem consists of a Python-like, indentation-based programming language and a dedicated command-line environment. The interpreter processes raw source code through a lexer and parser to build an Abstract Syntax Tree (AST), which is then directly executed without an intermediate compilation step or bytecode generation.

Installation

pip install rubus-b1

On Linux/macOS, no extra dependencies are needed. On Windows, windows-curses is installed automatically.

After installing, the rubed command is available globally:

rubed                          # open the editor with an empty buffer
rubed path/to/script.rub       # open a file in the editor
rubed path/to/script.rub --run # run a script headlessly

Features

The Rubus Language

• Control flow: if / elif / else, for, while
• Types: integers, floats, booleans, strings, and f-strings
• Built-in collections: lists, dictionaries, sets, and tuples
• List and dictionary comprehensions
• Custom struct definitions
• Function definitions (def) and variable declarations (let)
• Lexical scoping and environment management
• Try / except / finally error handling
• Tuple unpacking: a, b = 1, 2
• Default parameters and keyword arguments

The Rubus Editor (rubed)

• Terminal-native: built with curses for a seamless command-line workflow
• Syntax highlighting: real-time colorization for keywords, types, strings, numbers, comments, and operators
• Integrated execution: run .rub scripts directly from within the editor

Keybindings

Usage

# Open editor with empty buffer
rubed

# Open a specific file
rubed path/to/script.rub

# Run a script without opening the editor
rubed path/to/script.rub --run

Example

def greet(name: str) -> str:
    return f"Hello, {name}!"

let names: list = ["Alice", "Bob", "Carol"]
for n in names:
    print(greet(n))

Requirements

• Python 3.10+
• windows-curses (Windows only, installed automatically)