echo-app-sbt

A modular Scala 3 application built with sbt, developed as part of the DIBS course (Diseño e Implementación de Bibliotecas de Software).

This project demonstrates the evolution of a basic Scala console application into a multi-module architecture, separating a reusable library (lib) from the main executable application (app). It's ideal for exploring best practices in modularization, dependency management, and scalable project structure with sbt.

🗣 Although the course materials are in Spanish, this repository and its code are written in English to make the project more accessible to a wider audience.

📚 About the Lessons

This repository supports two lessons from the DIBS course:

✅ Creating a Basic Project with sbt

• Learn how to install and use sbt
• Generate a basic Scala 3 project using the official Giter8 template
• Understand the standard src/main and src/test directory structure
• Run a small console app using Scala 3's @main annotation

🧱 Structuring Multi-Module Projects with sbt

• Convert the basic project into a multi-module layout
• Define lib and app subprojects in build.sbt
• Share settings across modules with commonSettings
• Call a function defined in the library from the main application

🚀 Running the Application

From the root of the project, you can run the main module with:

sbt "app/run Alex Dim Nah Dim"

Expected output:

Alex
Dim
Nah
Dim

📁 Project Structure

echo-app-sbt/
├── build.sbt               # Defines common settings and declares modules
├── project/
│   └── build.properties    # sbt version
├── lib/                    # Reusable library module
│   └── src/
│       └── main/
│           └── scala/
│               └── cl/ravenhill/echo/echoMessage.scala
├── app/                    # Application module
│   └── src/
│       └── main/
│           └── scala/
│               └── cl/ravenhill/echo/app.scala
└── README.md

🛠️ Requirements

• Scala 3.x
• sbt 1.10+
• Java 17 or later (tested with Java 23)

🎓 Part of the DIBS Course

This repository is part of the official examples used in the Diseño e Implementación de Bibliotecas de Software (DIBS) course.
To explore more lessons and materials, visit dibs.pages.dev.