build_pyodide - use prebuilt pyodide build env

pyodide/build_pyodide.sh

@@ -1,17 +1,36 @@
 #!/usr/bin/bash
-set -e
-cd pyodide
-make
-cd ..
+set -ex
+
+# Install uv.
+curl -LsSf https://astral.sh/uv/install.sh | sh
+uv venv --python 3.13
+source .venv/bin/activate
+
+# Install pyodide cross build environment.
+# Instructions: https://pyodide.org/en/stable/development/building-packages.html
+uv pip install pyodide-build
+# `uv run` is required, so xbuildenv would skip using `pip`.
+uv run pyodide xbuildenv install
+
+# Emscripten doesn't come with xbuildenv.
+git clone https://github.com/emscripten-core/emsdk
+pushd emsdk
+PYODIDE_EMSCRIPTEN_VERSION=$(pyodide config get emscripten_version)
+./emsdk install ${PYODIDE_EMSCRIPTEN_VERSION}
+./emsdk activate ${PYODIDE_EMSCRIPTEN_VERSION}
+source emsdk_env.sh
+which emcc
+popd
+
 mkdir -p packages/ifcopenshell
+VERSION=`cat IfcOpenShell/VERSION`
 cp IfcOpenShell/pyodide/meta.yaml packages/ifcopenshell
-# Required, otherwise pyodide will create new temp pyodide environment.
-export PYODIDE_ROOT=/src/pyodide
-# Ensure emsdk tools are in PATH.
-export PATH=$PYODIDE_ROOT/emsdk/emsdk:$PYODIDE_ROOT/emsdk/emsdk/node/22.16.0_64bit/bin:$PYODIDE_ROOT/emsdk/emsdk/upstream/emscripten:$PATH
+sed -i s/0.8.0/$VERSION/g packages/ifcopenshell/meta.yaml
+
 # Use custom build ifcopenshell directory in build-all to make caching simpler
 # Otherwise pyodide build path typically includes package version, so cached cmake configs might break.
-export BUILD_DIR=/src/ifcopenshell_build
+export BUILD_DIR=`readlink -f ifcopenshell_build`
+
 # Use build-recipes-no-deps first, so logs would be printed to stdout.
 pyodide build-recipes-no-deps ifcopenshell
 pyodide build-recipes ifcopenshell --install