name: Publish npm package

# Publishes magic-vlsi-wasm to npm.
# Triggered automatically on version tags (v*); can also be run manually.
# Requires an NPM_TOKEN repository secret for publishing.
#
# WASM is architecture-independent — built once on x86-64, usable everywhere.

on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:
    inputs:
      dry_run:
        description: 'Dry run: pack only, do not publish'
        type: boolean
        default: true

# actions/upload-artifact@v5 still runs on Node.js 20. Force Node 24 to
# silence the deprecation warning until upload-artifact ships a Node-24
# release. Drop this once upgraded.
env:
  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

jobs:
  build-and-publish:
    runs-on: ubuntu-22.04

    steps:
      - uses: actions/checkout@v5

      - name: Set up Node.js
        uses: actions/setup-node@v5
        with:
          node-version: '22'
          registry-url: 'https://registry.npmjs.org'

      - name: Install emsdk
        env:
          # --- emsdk version switch -----------------------------------------
          # Pinned: must match .github/workflows/main.yml. See post-build.sh.
          # To test against the latest emsdk, comment the pinned line and
          # uncomment the "latest" line below.
          EMSDK_VERSION: '3.1.56'
          # EMSDK_VERSION: 'latest'
        run: |
          git clone https://github.com/emscripten-core/emsdk.git
          cd emsdk
          ./emsdk install "$EMSDK_VERSION"
          ./emsdk activate "$EMSDK_VERSION"

      - name: Build WASM
        run: |
          source ./emsdk/emsdk_env.sh
          # --without/--disable flags: no WASM library available for these features
          CFLAGS="--std=c17 -D_DEFAULT_SOURCE=1 -DEMSCRIPTEN=1" emconfigure ./configure \
            --without-cairo --without-opengl --without-x --without-tk --without-tcl \
            --disable-readline --disable-compression \
            --host=asmjs-unknown-emscripten \
            --target=asmjs-unknown-emscripten
          # Append WASM linker flags and activate the WASM link target
          cat toolchains/emscripten/defs.mak >> defs.mak
          # Build in order: techs must exist before mains (--embed-file embeds them)
          emmake make depend
          emmake make -j$(nproc) modules libs
          emmake make techs
          emmake make mains

      - name: Copy WASM artifacts into npm/
        run: |
          cp magic/magic.js  npm/
          cp magic/magic.wasm npm/

      - name: Set package version from tag
        if: startsWith(github.ref, 'refs/tags/v')
        run: |
          VERSION="${GITHUB_REF#refs/tags/v}"
          cd npm
          npm version "$VERSION" --no-git-tag-version

      - name: Pack
        run: ./npm/pack.sh

      - name: Upload tarball as artifact
        uses: actions/upload-artifact@v5
        with:
          name: magic-wasm-npm-package
          path: npm/*.tgz

      - name: Publish to npm
        if: startsWith(github.ref, 'refs/tags/v') && github.event.inputs.dry_run != 'true'
        run: cd npm && npm publish --access public
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}