Publish Node package on npmjs.com on tags

.github/workflows/build-and-test.yml

@@ -877,6 +877,40 @@ jobs:
           EOF
       - run: |
           twine upload --repository pypi *.whl
+  npmjs-publish:
+    name: "Upload STT packages to npmjs.com"
+    runs-on: ubuntu-20.04
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
+    needs: [repackage-nodejs-allplatforms]
+    steps:
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 12
+          registry-url: 'https://registry.npmjs.org'
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Compute tag for npm from git tag
+        id: compute-npm-tag
+        run: |
+          pip install semver
+          cat <<EOF | python - "${{ github.ref }}"
+          import sys
+          import semver
+          ref = sys.argv[1]
+          prefix = "refs/tags/v"
+          assert ref.startswith(prefix)
+          parsed = semver.parse_version_info(ref[len(prefix):])
+          print("::set-output name=npm-tag::{}".format("prerelease" if parsed.prerelease else "latest"))
+          EOF
+      - uses: actions/download-artifact@v2
+        with:
+          name: stt-tflite.tgz
+          path: ${{ github.workspace }}/
+      - run: |
+          npm publish --access=public --verbose ${{ github.workspace }}/stt-*.tgz --tag ${{ steps.compute-npm-tag.outputs.npm-tag }}
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
   # macOS jobs
   swig_macOS:
     name: "Mac|Build SWIG"