Nubo ☁️

Nubo is a small programming language for building web apps, APIs, scripts, and tools.

It is designed to make server-side web development feel simple: write normal Nubo code, return HTML values, organize routes as files, and use a standard library instead of wiring everything from scratch.

Nubo means “cloud” in Esperanto.

Why Nubo?

Nubo is built around a few simple ideas:

• Readable syntax that is easy to learn.
• HTML as a language value, not just strings.
• File-based routing for web apps.
• Structs and methods for clean application code.
• Typed values without making simple code noisy.
• Standard libraries for common web, system, database, component, and reflection tasks.
• Package imports using simple names like @nubolang/color.

A Small Taste

struct User {
    name: string
}

impl User {
    fn init(self: User, name: string) void {
        self.name = name
    }

    fn greet(self: User) string {
        return "Hello, " + self.name
    }
}

let user = User("Martin")

println(user.greet())

HTML Without String Templates

Nubo can write HTML directly:

let name = "Nubo"

let page = <main>
    <h1>Hello, { name }</h1>
    <p>Build pages without turning HTML into strings.</p>
</main>

Interpolated values are escaped by default. Trusted HTML can be inserted with !{ ... }.

Web Apps

Nubo can serve a folder of .nubo files:

nubo serve public

Example route:

import { write: writeResponse } from "@server/response"

writeResponse(<main>
    <h1>Hello from Nubo</h1>
</main>)

Example structure:

public/
  index.nubo
  about.nubo
  api/
    users/
      index.nubo
      [id].nubo

Packages

Install a package:

nubo get github.com/nubolang/color

Use it:

import color from "@nubolang/color"

println(color.green("success"))

Installation

Install Go first, then install Nubo:

go install github.com/nubolang/nubo/cmd/nubo@latest

Check it:

nubo --version

CLI

nubo file.nubo
nubo serve public
nubo init
nubo get github.com/user/package
nubo download
nubo config

Learn More

Read the docs and guides:

https://nubo.mrtn.vip

Status

Nubo is under active development. The language, standard libraries, and tooling may change as the project grows.