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Filename	Latest commit message	Latest commit date
Gergő Törcsvári e7640d0a97 build(wasm): standardize asyncify wasm-opt tail to -O1 everywhere The Binaryen wasm-opt shrink after Asyncify was the only -O2 in the pipeline: -O2 by default (local + tag release) but -O1 in main CI. The C++/wx/deps compile is already -O1 everywhere (DEBUG_BUILD defaults to 1; nothing passes --release in CI/release). Pin the tail to -O1 too: - apply-asyncify.sh: BINARYEN_OPT_LEVEL default -O2 -> -O1 - release.yml: opt_level -O2 -> -O1 (demo now ships -O1) - ci-ubicloud.yml / wasm-build.yml / docker/build.sh: refresh stale -O2 comments Because both callers now build at -O1, the FINAL cache key converges, so a tag release FINAL-cache-hits main's build and skips the asyncify-tail rebuild entirely (previously the ~1-2h -O2 wasm-opt was rerun per release). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>		2026-07-01 12:18:57 +02:00
..
build.sh	build(wasm): standardize asyncify wasm-opt tail to -O1 everywhere	2026-07-01 12:18:57 +02:00
docker-compose.yml	feat(wasm-eh): migrate the WASM build to native wasm exceptions (+ 3D viewer default-on)	2026-06-30 09:40:26 +02:00
Dockerfile	feat(wasm-eh): migrate the WASM build to native wasm exceptions (+ 3D viewer default-on)	2026-06-30 09:40:26 +02:00
entrypoint.sh	fix(docker): make container emsdk authoritative for exec, stop host emsdk leak	2026-05-25 19:41:55 +02:00
README.md	Add Quick Start docs and branch-specific Docker builds	2026-01-03 09:08:12 +01:00
shell.sh	feat(wasm-eh): migrate the WASM build to native wasm exceptions (+ 3D viewer default-on)	2026-06-30 09:40:26 +02:00

README.md

Docker Build Environment for KiCad WASM

This directory contains Docker configuration for building KiCad for WebAssembly in a reproducible, isolated environment.

Prerequisites

Docker Desktop (with Docker Compose v2)
Git submodules initialized: git submodule update --init --recursive

Quick Start

# Build KiCad WASM (full build)
./docker/build.sh

# Build with options
./docker/build.sh --no-clean    # Skip cleaning build directory
./docker/build.sh --debug       # Build with debug symbols

# Interactive shell for debugging
./docker/shell.sh

Branch-Specific Builds

Each git branch gets isolated Docker containers and volumes, enabling parallel development:

# On branch 'main' → containers/volumes prefixed with 'kicad-wasm-main'
# On branch 'feature-x' → containers/volumes prefixed with 'kicad-wasm-feature-x'

This allows you to:

Work on multiple branches simultaneously using git worktrees
Each worktree has its own build cache (no conflicts)
Switch branches without rebuilding from scratch

Using git worktrees for parallel development:

# Create a worktree for a new branch
git worktree add ../kicad-wasm-feature path/to/branch

# Build in the worktree (uses isolated Docker volumes)
cd ../kicad-wasm-feature
./docker/build.sh

# List all worktrees
git worktree list

What Gets Built

The build process includes:

Dependencies (cached in Docker volume):
- GLM (header-only)
- Zstd, Protobuf
- FreeType, HarfBuzz
- Pixman, Cairo
- Boost (Locale)
- OpenCASCADE (optional, for 3D/STEP)
- CURL headers, libgit2 headers (stubs)
wxWidgets (built from submodule)
KiCad PCBnew (main application)

Container Resources

Configured for M4 Max (adjust in docker-compose.yml):

CPUs: 10 cores
Memory: 16GB

Volume Strategy

Path	Type	Purpose
`/workspace`	Bind mount	Source code
`/workspace/build-wasm`	Named volume	Build cache (deps, sysroot)
`/workspace/output`	Bind mount	Final WASM output

Common Commands

# Start container
docker compose -f docker/docker-compose.yml up -d

# Run a command inside
docker compose -f docker/docker-compose.yml exec kicad-wasm-builder <command>

# View logs
docker compose -f docker/docker-compose.yml logs -f

# Stop container
docker compose -f docker/docker-compose.yml down

# Clear build cache (full rebuild)
docker volume rm docker_kicad-build-cache

Troubleshooting

Build freezes

The OpenCASCADE build is very resource-intensive. If it freezes:

Reduce parallel jobs: Edit script to use -j4 instead of -j$(nproc)
Monitor with docker stats
Consider building OpenCASCADE separately with ./scripts/deps/build-opencascade.sh

Permission issues

Files created in container are owned by root. To fix:

sudo chown -R $(whoami) output/

Cache issues

# Clear all cached builds
docker volume rm docker_kicad-build-cache

# Or clear specific stamps inside container
./docker/shell.sh
rm /workspace/build-wasm/stamps/*.stamp