Philip Jama

Rust WebAssembly Build Environment

Containerized Compilation Pipeline

Project Overview

A containerized build environment that solves the challenge of consistent WebAssembly compilation across different development machines. This project creates a Docker container with Ubuntu Linux, Rust nightly compiler, and WebAssembly tooling to provide reproducible builds from Rust source code to optimized .wasm bytecode.

Built during the early days of WebAssembly adoption (December 2017), when tooling was less mature and cross-platform compilation environments were inconsistent. The project demonstrates a 'build pipeline as code' approach, encapsulating the entire compilation workflow in a containerized environment.

Key Features:

  • Reproducible Builds - Eliminates 'works on my machine' issues by standardizing the compilation environment
  • Optimized Output - Two-stage compilation with WebAssembly garbage collection for minimal file sizes
  • Development Workflow - Volume mounting allows editing on host while compiling in container
  • Testing Environment - Built-in HTTP server for immediate WebAssembly testing

The compilation pipeline uses rustc +nightly with WebAssembly target support, followed by wasm-gc optimization to produce compact bytecode suitable for web deployment. This approach was particularly valuable for teams requiring consistent CI/CD pipelines and cross-platform development workflows.

Project Details

Date:

December 2017

Approach:

Build Pipeline as Code

Base Image:

Ubuntu + GCC + Rust Nightly

Pipeline:

Rust → WASM → Optimization → Testing

Repo:

github.com/pjama/rust-wasm-docker

Tags:

Rust, WebAssembly, Docker, Build Tools, DevOps