@wllama/wllama/scripts/docker-compose.yml

WebAssembly binding for llama.cpp - Enabling on-browser LLM inference

services:
  llamacpp-wasm-builder:
    container_name: llamacpp-wasm-builder
    build:
      context: .
      dockerfile_inline: |
        ARG EMSDK_IMAGE_TAG=none  # modify it in build_wasm.sh
        FROM emscripten/emsdk:$${EMSDK_IMAGE_TAG}
        RUN apt update && apt install -y git
      args:
        EMSDK_IMAGE_TAG: ${EMSDK_IMAGE_TAG}
    user: "${D_UID}:${D_GID}"
    environment:
      - WLLAMA_TEST_BACKEND=${WLLAMA_TEST_BACKEND:-}
      - SKIP_COMPAT=${SKIP_COMPAT:-}
    volumes:
      - ..:/source:Z
    entrypoint: /bin/bash
    command:
      - -c
      - |
        set -e
        cd /source

        mkdir -p build
        cd build
        mkdir -p emdawn

        DAWN_TAG=v20260317.182325
        EMDAWN_PKG="emdawnwebgpu_pkg-$${DAWN_TAG}.zip"
        EMDAWNWEBGPU_DIR="/source/build/emdawn/emdawnwebgpu_pkg"
        echo "Downloading $${EMDAWN_PKG}"
        curl -L -o emdawn.zip \
          "https://github.com/google/dawn/releases/download/$${DAWN_TAG}/$${EMDAWN_PKG}"
        python3 -c "import zipfile; zf=zipfile.ZipFile('emdawn.zip','r'); zf.extractall('/source/build/emdawn'); zf.close()"

        CMAKE_EXTRA_FLAGS="-DWLLAMA_TEST_BACKEND=OFF"
        if [ -n "${WLLAMA_TEST_BACKEND}" ]; then
          CMAKE_EXTRA_FLAGS="-DWLLAMA_TEST_BACKEND=ON";
        fi

        emcmake cmake .. -DGGML_WEBGPU=ON -DGGML_WEBGPU_JSPI=ON -DEMDAWNWEBGPU_DIR="$${EMDAWNWEBGPU_DIR}" $${CMAKE_EXTRA_FLAGS}
        emmake make wllama -j$$(nproc)

        # go back to root
        cd ..

        # copy output files
        mkdir -p src/wasm
        cp build/wllama.js   src/wasm
        cp build/wllama.wasm src/wasm

        # build compat package (skip if SKIP_COMPAT=1)
        if [ -z "${SKIP_COMPAT}" ]; then
          mkdir -p build-compat
          cd build-compat
          emcmake cmake .. -DWLLAMA_COMPAT=ON -DLLAMA_WASM_MEM64=OFF -DGGML_WEBGPU=ON -DGGML_WEBGPU_JSPI=OFF -DEMDAWNWEBGPU_DIR="$${EMDAWNWEBGPU_DIR}" $${CMAKE_EXTRA_FLAGS}
          emmake make wllama -j$$(nproc)

          # go back to root
          cd ..

          # copy output files (compat build)
          mkdir -p compat/wasm
          cp build-compat/wllama.js   compat/wasm
          cp build-compat/wllama.wasm compat/wasm
        fi

        # generate source map
        node scripts/build_source_map.js

        # list files (optional, for verification)
        ls -lh build
        if [ -d build-compat ]; then
          ls -lh build-compat
        fi