Fix launching of IfcTester webapp with Bonsai

src/bonsai/bonsai/bim/module/tester/operator.py

@@ -337,9 +337,21 @@ class StartIfcTesterWebapp(bpy.types.Operator):
             websocket_server_thread = threading.Thread(target=run_websocket_server, daemon=True)
             websocket_server_thread.start()
 
+            py_version = sys.version_info
+            bonsai_lib_path = (
+                Path(bpy.utils.user_resource("EXTENSIONS"))
+                / ".local"
+                / "lib"
+                / f"python{py_version.major}.{py_version.minor}"
+                / "site-packages"
+            )
+            env = os.environ.copy()
+            env["BONSAI_LIB_PATH"] = str(bonsai_lib_path)
+            env["BONSAI_VERSION"] = tool.Blender.get_bonsai_version()
+
             # Start the Flask server as subprocess
             webapp_process = subprocess.Popen(
-                [sys.executable, webapp_serve_path, "--host", "127.0.0.1", "--port", str(webapp_port)]
+                [sys.executable, webapp_serve_path, "--host", "127.0.0.1", "--port", str(webapp_port)], env=env
             )
 
             # Update properties

src/bonsai/docs/guides/development/installation.rst

@@ -174,6 +174,14 @@ If there are changes to the IfcOpenShell binaries, you may replace the two
 ``*ifcopenshell_wrapper*`` files with new ones downloaded from the automated
 `IfcOpenShell builds directory <https://builds.ifcopenshell.org/>`__.
 
+If you wish to run the IfcTester webapp, you will also need to have ``npm`` and
+setup IfcTester:
+
+.. code-block:: bash
+
+    cd src/ifctester
+    make webapp-prepare
+
 .. seealso::
 
     There is a `useful Blender Addon

src/ifctester/webapp/serve.py

@@ -17,8 +17,18 @@
 # along with IfcTester.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import sys
 import argparse
 import mimetypes
+
+bonsai_lib_path = os.environ.get("BONSAI_LIB_PATH")
+print(os.environ)
+print(bonsai_lib_path)
+bonsai_version = os.environ.get("BONSAI_VERSION")
+
+if bonsai_lib_path:
+    sys.path.insert(0, bonsai_lib_path)
+
 from flask import Flask, send_from_directory, send_file
 
 # Browsers expecting this specific MIME type for .mjs files,