Deder 🔗

Deder is a config-based, concurrent-first, client-server build tool for JVM projects (Java and Scala).
It uses Pkl for configuration, providing type safety, IDE support, and powerful abstraction capabilities.

Key Concepts 🔗

Project is the root directory where your build configuration lives (usually the git repo root).

Modules are subprojects within your project (like common, frontend, backend, etc.). They can depend on each other, forming a directed acyclic graph (DAG).

Tasks are operations that can be performed on modules (like compile, run, test). Each module type has a predefined set of tasks available.
They also form a directed acyclic graph (DAG).

Site Map 🔗

• Tutorials

  • Installation
  • Quickstart
  • Packaging
  • Publishing
  • Scala.js
  • Scala Native
  • Cross Project

• How Tos

  • Adding dependencies
  • Environment variables and JVM options
  • Invoking Maven applications
  • OTEL tracing/logging/metrics

• Reference

  • Cheatsheet
  • Architecture
  • Task caching
  • Files layout
  • Server Properties
  • Repositories
  • Testing

• Philosophy

  • Design Philosophy
  • Why Pkl?

IDE setup 🔗

Run deder bsp install and then open with VSCode or IntelliJ (open as a BSP project).

Tips & Tricks 🔗

Generate an SVG of the dependency graph for a specific task:

deder plan -m common -t compileClasspath --dot | dot -Tsvg > bla.svg