subagent transcript

session 17f09f89 · workflow wf_4e894f41
← 17f09f89 · archive
delegated task
You are working on the FreeCAD -> WebAssembly port. Ground EVERYTHING in the real code; do not guess. - Source tree: /home/magik6k/lcad-wasm/freecad-p
▸ Magik
You are working on the FreeCAD -> WebAssembly port. Ground EVERYTHING in the real code; do not guess. - Source tree: /home/magik6k/lcad-wasm/freecad-port/FreeCAD (git branch wasm-port). CMake build dir (out-of-source, already configured): /opt/toolchains/src/freecad-gui-build — read /opt/toolchains/src/freecad-gui-build/CMakeCache.txt for BUILD_* flags and dep paths. Build binary: bin/FreeCAD.wasm (~180 MB). - Toolchain: emscripten, ASYNCIFY + JS exceptions (-fexceptions), SINGLE-THREADED (no pthreads). Static CPython 3.14 + static Qt 6.11 (wasm) + static OCCT + static Coin3D. Everything is statically linked; there is NO dlopen — Python C-extension modules are registered statically via PyImport_AppendInittab in the generated file src/Main/WasmInittab.cpp / WasmInittabGui.cpp (see also freecadWasmRegisterInittab in src/Main/MainGui.cpp). - CRITICAL wasm constraints you MUST check for and design around: (1) THREADING HANGS: any std::thread ctor / std::async(default or async policy) / QThreadPool / QtConcurrent / QThread worker HANGS or throws (no pthreads). Fix pattern: force synchronous/deferred on __EMSCRIPTEN__ (e.g. std::launch::deferred), or #ifndef FC_OS_WASM guard the worker and run inline. Example already in-tree: Mod/Sketcher/App/planegcs/GCS.cpp forced std::launch::deferred; App/Application.cpp guards _recomputeThread with #ifndef FC_OS_WASM; Gui/ProgressBar.cpp skips qApp->processEvents() on __EMSCRIPTEN__. (2) MODAL DIALOGS / NESTED EVENT LOOPS: QDialog::exec()/QMessageBox::exec()/QEventLoop::exec() may deadlock under asyncify when driven from outside the main loop. Task-panel (docked, non-modal) dialogs are preferred. (3) Reentrant ccalls from JS during asyncify suspend corrupt state — a QTimer command-pump (/fc-cmd.py) exists for JS->Python. QtWebEngine has NO wasm port (Web workbench / in-app help / real Start page can't use it). (4) Wasm guards used in-tree: __EMSCRIPTEN__ (compiler-provided) and FC_OS_WASM (FreeCAD-defined) — both are defined on wasm. - Built modules today: Part, Sketcher, Material, Start (+ kernel). Everything else is OFF (see BUILD_* in CMakeCache). - PySide/shiboken: FREECAD_USE_PYSIDE=OFF, FREECAD_USE_SHIBOKEN=OFF, PySide6_DIR/Shiboken6_DIR NOTFOUND. Python 'PySide'/'shiboken6' import fails at runtime ("Cannot load shiboken6"). Many workbenches (Draft, BIM, most task dialogs) are Python+PySide and cannot function without it. DELIVERABLES — do BOTH: 1) Write a thorough, concrete, ready-to-apply plan to /home/magik6k/lcad-wasm/porting/<SLUG>/plan.md — include: exact CMake flags/edits, exact source edits (file + before/after or unified-diff snippets precise enough to apply), any NEW files (full contents), external-dependency build recipes (how to build each dep for this emscripten/asyncify toolchain), a threading-hazard list (grep the real files, give file:line + the exact construct + the exact fix), a modal-dialog-hazard list, the PyImport_AppendInittab lines to add, an ordered step list, and an effort/risk estimate. Put any patch files or new-file contents as separate files in that dir too. 2) Return the structured summary (the schema). Keep summary fields concise; the depth goes in plan.md. Your returned text IS the structured object. Be exhaustive and correct — token cost is not a concern. Verify claims against the actual files (use grep/read). If a dependency has no known wasm port, say so plainly and estimate the porting effort. === YOUR SCOPE: Wire PySide/shiboken into the FreeCAD wasm build (slug: pyside-integrate) === Given PySide6/shiboken6 static libs exist for wasm, produce the FreeCAD-side integration: set FREECAD_USE_PYSIDE=ON / FREECAD_USE_SHIBOKEN=ON, point PySide6_DIR/Shiboken6_DIR; find every place FreeCAD uses shiboken/PySide (grep src/ for shiboken, PySide, getMainWindow, PythonWrapper, Gui::PythonWrapper, wrap()) and what must be registered in the static inittab (WasmInittab*.cpp) — the exact PyImport_AppendInittab lines for PySide6.QtCore/QtGui/QtWidgets and shiboken6. Identify what breaks: Gui::getMainWindow() Python return, task dialogs, macro system. Enumerate the minimal set of PySide modules FreeCAD actually needs. Write your full plan + any patch/new-file contents under /home/magik6k/lcad-wasm/porting/pyside-integrate/ (create the dir; plan.md is required). Then return the structured summary with deliverableFile=/home/magik6k/lcad-wasm/porting/pyside-integrate/plan.md.
Fable
thinking
I'm going to dig into the FreeCAD codebase to understand how it integrates PySide and shiboken, then review the current CMake setup to see what needs adjusting.
Fable
I'll investigate the real code before writing the plan. Let me start with parallel exploration.
Fable
⚙ Bash {"command": "git branch --show-current 2>/dev/null; echo \"---CMakeCache PYSIDE/SHIBOKEN---\"; grep -iE \"PYSIDE|SHIBOKEN\" /opt/toolchains/src/freecad-gui-build/CMakeCache.txt 2>/dev/null; echo \"---BUILD flags---\"; grep -E \"^BUILD_[A-Z_…
tool result
wasm-port
---CMakeCache PYSIDE/SHIBOKEN---
//Links to the PySide libraries at build time.
FREECAD_USE_PYSIDE:BOOL=OFF
//Links to the shiboken library at build time. If OFF its Python
FREECAD_USE_SHIBOKEN:BOOL=OFF
//The directory containing a CMake configuration file for PySide6.
PySide6_DIR:PATH=PySide6_DIR-NOTFOUND
//The directory containing a CMake configuration file for Shiboken6.
Shiboken6_DIR:PATH=Shiboken6_DIR-NOTFOUND
---BUILD flags---
BUILD_GUI:BOOL=ON
BUILD_MATERIAL:BOOL=ON
BUILD_PART:B  …[truncated]
Fable
⚙ Bash {"command": "echo \"===grep FREECAD_USE_PYSIDE/SHIBOKEN in cmake===\"; grep -rniE \"FREECAD_USE_PYSIDE|FREECAD_USE_SHIBOKEN\" --include=*.cmake --include=CMakeLists.txt cMake src 2>/dev/null | head -40", "description": "Find cmake usage of …
tool result
===grep FREECAD_USE_PYSIDE/SHIBOKEN in cmake===
cMake/FreeCAD_Helpers/PrintFinalReport.cmake:96:    value(FREECAD_USE_PYSIDE)
cMake/FreeCAD_Helpers/PrintFinalReport.cmake:97:    value(FREECAD_USE_SHIBOKEN)
cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake:4:    option(FREECAD_USE_SHIBOKEN "Links to the shiboken library at build time. If OFF its Python module is imported at runtime" ON)
cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake:5:    option(FREECAD_USE_PYSIDE "Links to the PySide librar  …[truncated]
Fable
⚙ Bash {"command": "ls src/Main/ | grep -i wasm; echo \"---inittab files---\"; ls -la src/Main/WasmInittab* 2>/dev/null", "description": "List wasm inittab files"}
tool result
Exit code 2
---inittab files---
Fable
thinking
I need to verify whether the inittab files are present on the system.
Fable
⚙ Bash {"command": "find src/Main -iname \"*Wasm*\" 2>/dev/null; echo \"---find generated inittab in build---\"; find /opt/toolchains/src/freecad-gui-build -iname \"*Inittab*\" 2>/dev/null | head; echo \"---MainGui inittab func---\"; grep -rn \"fr…
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake"}
tool result
1	macro(SetupShibokenAndPyside)
2	# -------------------------------- Shiboken/PySide ------------------------
3	
4	    option(FREECAD_USE_SHIBOKEN "Links to the shiboken library at build time. If OFF its Python module is imported at runtime" ON)
5	    option(FREECAD_USE_PYSIDE "Links to the PySide libraries at build time." ON)
6	
7	    if(DEFINED MACPORTS_PREFIX)
8	        find_package(Shiboken REQUIRED HINTS "${PYTHON_LIBRARY_DIR}/cmake")
9	        find_package(PySide REQUIRED HINTS "${PYTHON_L  …[truncated]
tool result
---find generated inittab in build---
/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittabGui.cpp
/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittab.cpp
/opt/toolchains/src/freecad-gui-build/src/Main/CMakeFiles/FreeCADMain.dir/WasmInittabGui.cpp.o
---MainGui inittab func---
src/Main/CMakeLists.txt:49:            string(APPEND _regs "    PyImport_AppendInittab(\"${_mod}\", PyInit_${_mod});\n")
src/Main/CMakeLists.txt:55:            "void freecadWasmRegisterInittab()\n"
src/Main/CMak  …[truncated]
Fable
thinking
I need to examine the CMakeLists.txt files for the GUI and shiboken/PySide configuration, check how the inittab gets generated in the main build setup, and search through the codebase for how shiboken and PySide are being used in the Python wrapper layer.
Fable
Now let me read the key CMake integration points and the inittab generation.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/CMakeLists.txt", "offset": 265, "limit": 75}
tool result
265	        SYSTEM
266	        PUBLIC
267	        ${OCULUS_INCLUDE_DIRS}
268	    )
269	    list(APPEND FreeCADGui_LIBS
270	        ${OCULUS_LIBRARIES}
271	    )
272	ENDIF(OCULUS_FOUND)
273	
274	if(FREECAD_USE_SHIBOKEN)
275	    add_definitions(-DHAVE_SHIBOKEN${PYSIDE_MAJOR_VERSION})
276	    target_include_directories(
277	        FreeCADGui
278	        SYSTEM
279	        PUBLIC
280	        ${SHIBOKEN_INCLUDE_DIR}
281	    )
282	    if (SHIBOKEN_LIBRARY)
283	        list(APPEND FreeCADGui_LIBS
284	  …[truncated]
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt", "offset": 1, "limit": 135}
tool result
1	# SPDX-License-Identifier: LGPL-2.1-or-later
2	
3	configure_file(freecad.rc.cmake ${CMAKE_CURRENT_BINARY_DIR}/freecad.rc)
4	configure_file(freecadCmd.rc.cmake ${CMAKE_CURRENT_BINARY_DIR}/freecadCmd.rc)
5	file(COPY icon.ico DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
6	
7	
8	if(EMSCRIPTEN)
9	    # Python extension modules are linked statically into the executables and
10	    # must be registered on the interpreter's inittab before Py_Initialize().
11	    set(FREECAD_WASM_PY_MODULES "")
12	    set(  …[truncated]
Fable
thinking
Now I'm looking at the FreeCAD source code to understand how shiboken and PySide are being used, particularly in the PythonWrapper files.
Fable
Now let me grep the FreeCAD source for shiboken/PySide/PythonWrapper usage.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== files with HAVE_SHIBOKEN / shiboken includes ===\"; grep -rln \"HAVE_SHIBOKEN\\|shiboken.h\\|sbk\\|Shiboken::\" src/ --include=*.cpp --include=*.h | head -40", "descri…
tool result
=== files with HAVE_SHIBOKEN / shiboken includes ===
src/Gui/PythonWrapper.cpp
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== PythonWrapper files ===\"; ls -la src/Gui/PythonWrapper.* 2>/dev/null; echo; echo \"=== grep HAVE_PYSIDE / PySide includes ===\"; grep -rln \"HAVE_PYSIDE\\|pyside.h\\|…
tool result
=== PythonWrapper files ===
-rw-r--r-- 1 agent agent 30730 Jul  3 17:58 src/Gui/PythonWrapper.cpp
-rw-r--r-- 1 agent agent  3592 Jul  3 17:58 src/Gui/PythonWrapper.h

=== grep HAVE_PYSIDE / PySide includes ===
src/App/ProgramInformation.cpp
src/Gui/CallTips.cpp
src/Gui/PythonWrapper.cpp
src/Gui/Application.cpp
src/Gui/UiLoader.cpp
src/Gui/Quarter/QuarterWidget.cpp
src/Gui/UiLoader.h
src/Gui/Inventor/MarkerBitmaps.cpp
src/Mod/Fem/Gui/Command.cpp
src/Mod/Fem/Gui/TaskPostBoxes.cpp
src/Mod/Material/  …[truncated]
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/PythonWrapper.cpp"}
tool result
1	/***************************************************************************
2	 *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
3	 *                                                                         *
4	 *   This file is part of the FreeCAD CAx development system.              *
5	 *                                                                         *
6	 *   This library is free software; you can redistribute it and/or         *
7	 *   modify it under the  …[truncated]
Fable
thinking
I'm tracing through how PySide modules get imported at runtime, particularly the shiboken module import mechanism that relies on PyImport and the inittab registry. I need to examine the UiLoader, FreeCADGuiPy.cpp, and the getMainWindow Python binding to understand how statically linked PySide6/shiboken6 modules register their PyInit functions.

The key insight is that PySide6.QtCore is a submodule of the PySide6 package, and in CPython's static linking model, PyImport_AppendInittab registers modules by their fully-qualified name while the init function itself is named by just the final component—so `PySide6.QtCore` maps to `PyInit_QtCore`. I should verify whether the PySide static libraries   …
Fable
Let me check the other consumers and the shiboken/PySide static libs availability.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== UiLoader.cpp shiboken/pyside refs ===\"; grep -n \"PySide\\|Shiboken\\|HAVE_\\|QUiLoader\\|registerWidget\" src/Gui/UiLoader.cpp | head -40", "description": "UiLoader …
tool result
=== UiLoader.cpp shiboken/pyside refs ===
106:PySideUicModule::PySideUicModule()
107:    : Py::ExtensionModule<PySideUicModule>("PySideUic")
111:        &PySideUicModule::loadUiType,
112:        "PySide lacks the \"loadUiType\" command, so we have to convert the ui file to py code "
116:    add_varargs_method("loadUi", &PySideUicModule::loadUi, "Addition of \"loadUi\" to PySide.");
119:        &PySideUicModule::createCustomWidget,
122:    initialize("PySideUic helper module");  // register  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== getMainWindow python binding ===\"; grep -rn \"getMainWindow\\|PythonWrapper\\|wrap(\\|\\.wrap\\|fromQWidget\\|fromQObject\" src/Gui/ApplicationPy.cpp 2>/dev/null | he…
tool result
=== getMainWindow python binding ===
src/Gui/ApplicationPy.cpp:63:#include "PythonWrapper.h"
src/Gui/ApplicationPy.cpp:345:    {"getMainWindow",
src/Gui/ApplicationPy.cpp:348:     "getMainWindow() -> QMainWindow\n"
src/Gui/ApplicationPy.cpp:876:        getMainWindow()->setActiveWindow(view);
src/Gui/ApplicationPy.cpp:1178:    requirePythonMainThread("FreeCADGui.getMainWindow");
src/Gui/ApplicationPy.cpp:1181:        return Py::new_reference_to(MainWindowPy::createWrapper(Gui::getMainWindow(  …[truncated]
Fable
⚙ Bash {"command": "ls -la /opt/toolchains/ 2>/dev/null; echo \"=== find pyside/shiboken libs ===\"; find /opt/toolchains -iname \"*pyside*\" -o -iname \"*shiboken*\" 2>/dev/null | grep -iE \"\\.a$|\\.so|Config.*cmake|/include/\" | head -60", "des…
tool result
total 20196
drwxr-xr-x 21 agent agent     4096 Jul  4 14:17 .
drwxr-xr-x  1 root  root      4096 Jul  3 18:10 ..
drwxr-xr-x  4 agent agent     4096 Jul  4 06:22 boost-wasm
drwxr-xr-x 12 agent agent     4096 Jul  4 04:42 emsdk
-rw-r--r--  1 agent agent     1128 Jul  4 03:04 fix-freetype-sjlj.sh
drwxr-xr-x  4 agent agent     4096 Jul  4 06:22 fmt-wasm
drwxr-xr-x  3 agent agent     4096 Jul  4 00:57 freecad-gui-web
drwxr-xr-x  4 agent agent     4096 Jul  4 06:22 gtest-wasm
drwxr-xr-x  7 agent agent  …[truncated]
Fable
thinking
I'm realizing the static libraries for PySide6 and shiboken6 don't actually exist yet in the toolchain, even though the task assumes they do. Building those libraries is going to be a major prerequisite before I can focus on the FreeCAD-side integration work.
Fable
⚙ Bash {"command": "find /opt/toolchains -iname \"*shiboken*\" 2>/dev/null | head; echo \"---any pyside anywhere---\"; find /opt/toolchains -path \"*PySide*\" -prune -o -iname \"*pyside*\" -print 2>/dev/null | head; find /opt/toolchains -iname \"*…
tool result
---any pyside anywhere---
/opt/toolchains/src/freecad-gui-build/Ext/PySide
---python site-packages in wasm---
include
lib
link-flags-reference.txt
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== MainWindowPy createWrapper ===\"; grep -rn \"createWrapper\\|class MainWindowPy\\|MainWindowPy\" src/Gui/MainWindowPy.* src/Gui/MainWindow*.cpp 2>/dev/null | head; ech…
tool result
=== MainWindowPy createWrapper ===
src/Gui/MainWindowPy.h:35:class GuiExport MainWindowPy: public Py::PythonExtension<MainWindowPy>
src/Gui/MainWindowPy.h:41:    static Py::Object createWrapper(MainWindow* mw);
src/Gui/MainWindowPy.h:43:    static Py::ExtensionObject<MainWindowPy> create(MainWindow* mw);
src/Gui/MainWindowPy.h:45:    explicit MainWindowPy(MainWindow* mw);
src/Gui/MainWindowPy.h:46:    ~MainWindowPy() override;
src/Gui/MainWindowPy.cpp:30:#include "MainWindowPy.h"
src/Gui/MainWin  …[truncated]
Fable
thinking
So there are no PySide/shiboken WebAssembly libraries available—the only PySide reference is a generated Python shim in the build directory. What's striking is that `getMainWindow()` returns a FreeCAD-specific MainWindowPy wrapper (a PyCXX extension), not an actual shiboken-wrapped QMainWindow, meaning `Gui.getMainWindow()` gives you a custom FreeCAD object rather than a real PySide object.

Let me check the ApplicationPy.cpp file around line 1178 to see what's happening with the `getMainWindow()` Python binding.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/ApplicationPy.cpp", "offset": 1170, "limit": 30}
tool result
1170	}
1171	
1172	PyObject* ApplicationPy::sGetMainWindow(PyObject* /*self*/, PyObject* args)
1173	{
1174	    if (!PyArg_ParseTuple(args, "")) {
1175	        return nullptr;
1176	    }
1177	
1178	    requirePythonMainThread("FreeCADGui.getMainWindow");
1179	
1180	    try {
1181	        return Py::new_reference_to(MainWindowPy::createWrapper(Gui::getMainWindow()));
1182	    }
1183	    catch (const Py::Exception&) {
1184	        return nullptr;
1185	    }
1186	}
1187	
1188	PyObject* ApplicationPy:  …[truncated]
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/MainWindowPy.cpp", "offset": 40, "limit": 120}
tool result
40	
41	void MainWindowPy::init_type()
42	{
43	    behaviors().name("MainWindowPy");
44	    behaviors().doc("Python binding class for the MainWindow class");
45	    // you must have overwritten the virtual functions
46	    behaviors().supportRepr();
47	    behaviors().supportGetattr();
48	    behaviors().supportSetattr();
49	    behaviors().set_tp_new(extension_object_new);
50	
51	    add_varargs_method("getWindows", &MainWindowPy::getWindows, "getWindows()");
52	    add_varargs_method("getWindow  …[truncated]
Fable
thinking
The `getMainWindow()` function relies on `MainWindowPy::createWrapper` to convert the C++ window into a PySide-compatible object using shiboken, which is essential for attaching FreeCAD's Python methods. When shiboken is disabled, the code falls back to `qt_wrapInstance`, which attempts to import shiboken through Python instead.

Now I'm mapping out the full scope: checking how FreeCADGuiPy and other modules depend on PySide, understanding the macro system and ProgressBar integration, and figuring out how to register PySide as a static module in the inittab for a WebAssembly build.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== FreeCADGuiPy.cpp pyside ===\"; grep -n \"PySide\\|shiboken\\|Shiboken\\|PyImport\\|QtCore\\|QtGui\\|QtWidgets\" src/Main/FreeCADGuiPy.cpp | head -20; echo; echo \"=== …
tool result
=== FreeCADGuiPy.cpp pyside ===
131:            // of QApplication. Not even a sub-class can be used because otherwise PySide2 wraps it
132:            // with a QtCore.QCoreApplication which will raise an exception in ipykernel

=== CallTips PySide ===
295:                // For wrapped objects with PySide2 use the object, not its type
301:                if (!typestr.startsWith(QLatin1String("PySide"))

=== MarkerBitmaps ===
35:from PySide import QtCore
36:from PySide import QtGui

=== Qua  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== macro system exec / addTaskWatcher / control().showDialog ===\"; grep -rn \"wrap.fromQWidget\\|wrap.fromQObject\\|PythonWrapper wrap\\|loadWidgetsModule\\|loadUiToolsM…
tool result
=== macro system exec / addTaskWatcher / control().showDialog ===
src/Gui/ApplicationPy.cpp:1595:    PythonWrapper wrap;
src/Gui/ApplicationPy.cpp:1597:    wrap.loadWidgetsModule();
src/Gui/CommandActionPy.cpp:59:        PythonWrapper wrap;
src/Gui/CommandActionPy.cpp:60:        wrap.loadWidgetsModule();
src/Gui/CommandPyImp.cpp:289:        PythonWrapper wrap;
src/Gui/CommandPyImp.cpp:290:        wrap.loadWidgetsModule();
src/Gui/EditableDatumLabelPyImp.cpp:405:        PythonWrapper wrap;
src/  …[truncated]
Fable
thinking
I'm working through how PySide6 modules would be registered statically, since the actual libraries aren't available. The key init functions are `PyInit_QtCore`, `PyInit_QtGui`, and `PyInit_QtWidgets` for the Qt modules, plus `PyInit_Shiboken` for the shiboken6 module that provides the binding infrastructure.

For static embedding, I'd need to register these with `PyImport_AppendInittab` using fully-qualified dotted names like `PySide6.QtCore`, which CPython's BuiltinImporter can match directly. But there's a real complication: PySide6's package initialization files and shiboken6's setup code need to exist on the filesystem and run their initialization logic, including type registration and s  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== FindPySide6/Shiboken6 internal cmake ===\"; find cMake -iname \"*PySide*\" -o -iname \"*Shiboken*\" 2>/dev/null; echo \"=== Qt major, python version from cache ===\"; …
tool result
=== FindPySide6/Shiboken6 internal cmake ===
cMake/FindPySide2Tools.cmake
cMake/FindPySide6.cmake
cMake/FindPySide6Tools.cmake
cMake/FindShiboken6.cmake
cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake
=== Qt major, python version from cache ===
CMAKE_TOOLCHAIN_FILE:FILEPATH=/opt/toolchains/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
EGL_INCLUDE_DIR:PATH=/opt/toolchains/emsdk/upstream/emscripten/cache/sysroot/include
EMSCRIPTEN_FORCE_COMPILERS:BOOL=ON
EMSCRIPTEN_GENERATE_  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; grep -rn \"SetupShibokenAndPyside\\|Ext/PySide\\|InstallPySide\\|PYSIDE\" CMakeLists.txt cMake/ConfigureChecks.cmake 2>/dev/null | head; echo \"=== where macro is invoked ===\"; …
tool result
CMakeLists.txt:162:        SetupShibokenAndPyside()
=== where macro is invoked ===
CMakeLists.txt
=== python-wasm lib site-packages ===
libHacl_Hash_BLAKE2.a
libHacl_Hash_MD5.a
libHacl_Hash_SHA1.a
libHacl_Hash_SHA2.a
libHacl_Hash_SHA3.a
libexpat.a
libffi.a
libmpdec++.a
libmpdec.a
libpython3.14.a
python3.14
python3.14.zip
__future__.py
__hello__.py
__phello__
__pycache__
_aix_support.py
_android_support.py
_apple_support.py
_ast_unparse.py
_collections_abc.py
_colorize.py
Fable
thinking
I need to check the CMakeLists.txt file around line 162 and look at what the FindShiboken6 and FindPySide6 modules define so I can understand the full picture before laying out my approach.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt", "offset": 150, "limit": 20}
tool result
150	        endif()
151	    endif()
152	    SetupSwig()
153	    SetupEigen()
154	    # This file is included directly due to some cMake macros that are defined within.
155	    # If these macro definitions are embedded within another macro, it causes problems.
156	    include(cMake/FreeCAD_Helpers/SetupQt.cmake)
157	    SetupFreetype()
158	
159	    if(BUILD_GUI)
160	        SetupCoinPivy()
161	        SetupSpaceball()
162	        SetupShibokenAndPyside()
163	        SetupMatplotlib()
164	    endi  …[truncated]
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FindShiboken6.cmake"}
tool result
1	# The Qt for Python project officially recommends using pip to install Shiboken, so we expect to find Shiboken in the
2	# site-packages directory. FreeCAD also requires shiboken6_generator, so this find script also locates that package
3	# and ensures the inclusion of its include directory when using the pip finding mechanism
4	
5	
6	find_package(Shiboken6 CONFIG QUIET)
7	if(NOT Shiboken6_FOUND)
8	    if(NOT Shiboken6_INCLUDE_DIR AND TARGET Shiboken6::Shiboken6)
9	        get_property(Shiboken  …[truncated]
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FindPySide6.cmake"}
tool result
1	# The Qt for Python project officially recommends using pip to install PySide,
2	# so we expect to find PySide in the site-packages directory.
3	# The library will be called "PySide6.abi3.*", and there will
4	# be an "include" directory inside the site-packages/PySide6.
5	# Over time some distros may provide custom versions, so we also support
6	# using a more normal cMake find_package() call
7	
8	include(FindPackageHandleStandardArgs)
9	
10	find_package(PySide6 CONFIG QUIET)
11	
12	if(NOT PyS  …[truncated]
Fable
thinking
I need to verify how Material is being used in MaterialTreeWidgetPyImp.cpp since it's a built module, and also check the QuantityPy converter registration to ensure the Base::Quantity converter is properly set up with shiboken.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== Material MaterialTreeWidgetPyImp PySide use ===\"; grep -n \"PySide\\|PythonWrapper\\|wrap\\.\\|fromQWidget\\|loadWidgets\\|shiboken\" src/Mod/Material/Gui/MaterialTre…
tool result
=== Material MaterialTreeWidgetPyImp PySide use ===
25:#include <Gui/PythonWrapper.h>
72:        if ((QLatin1String(obj->ob_type->tp_name) == QLatin1String("PySide2.QtWidgets.QWidget")) ||
73:            (QLatin1String(obj->ob_type->tp_name) == QLatin1String("PySide6.QtWidgets.QWidget"))) {
74:            Gui::PythonWrapper wrap;
75:            wrap.loadWidgetsModule();
76:            auto qObject = wrap.toQObject(Py::Object(obj));

=== does anything std::thread in pyside path? (none expected) =  …[truncated]
Fable
thinking
I'm seeing the critical blocker now: the static WebAssembly libraries for PySide6 and shiboken6 don't actually exist in the toolchain, which means the foundational assumption of the task isn't met. Building these from scratch would be a massive undertaking since shiboken relies on libclang-based code generation and PySide6 has complex dependencies like QtConcurrent and embedded signature modules. This is the key feasibility decision that determines whether the whole approach is viable. The FreeCAD integration side would be manageable if those libraries existed, but...

On the FreeCAD side, assuming the libraries were available, I'd need to configure the CMake cache to enable PySide and shibo  …
Fable
I have a thorough picture. Let me verify the one remaining key fact: whether host PySide6 is importable (the CMake macro runs host Python), and Qt version.
Fable
⚙ Bash {"command": "grep -iE \"Python3_EXECUTABLE:|Qt6_VERSION|Qt6Core_VERSION|FREECAD_QT_MAJOR\" /opt/toolchains/src/freecad-gui-build/CMakeCache.txt 2>/dev/null | head; echo \"=== host python pyside6? ===\"; /opt/toolchains/venv/bin/python -c \"…
tool result
Python3_EXECUTABLE:UNINITIALIZED=/usr/bin/python3
FREECAD_QT_MAJOR_VERSION:INTERNAL=6
_Python3_EXECUTABLE:INTERNAL=/usr/bin/python3
=== host python pyside6? ===
Traceback (most recent call last):
  File "<string>", line 1, in <module>
Traceback (most recent call last):
=== qt wasm version ===
Fable
⚙ Bash {"command": "find /opt/toolchains/qt-asyncify -name \"Qt6ConfigVersion.cmake\" 2>/dev/null | head -1 | xargs grep -i \"PACKAGE_VERSION \" 2>/dev/null | head -2; echo \"---qt dir---\"; ls /opt/toolchains/qt-asyncify/ 2>/dev/null; echo \"---q…
tool result
---qt dir---
6.11.1
---qtbase version---
Fable
thinking
I've identified that PySide6 needs to match Qt 6.11.x, so now I have all the pieces to write out the comprehensive plan and create the necessary patch files.
Fable
Qt is 6.11.1, so PySide6 must be 6.11.x. I now have everything. Let me write the deliverables.
Fable
⚙ Bash {"command": "mkdir -p /home/magik6k/lcad-wasm/porting/pyside-integrate; echo created", "description": "Create porting dir"}
tool result
created
Fable
thinking
Now I'm writing out the plan.md file and doing a final grep to capture any remaining fromQWidget references so I have a complete inventory before documenting everything.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/plan.md", "content": "# Plan: Wire PySide6/shiboken6 into the FreeCAD wasm build (slug: pyside-integrate)\n\nTarget tree: `/home/magik6k/lcad-wasm/freecad-port/FreeCAD` (branch…
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/plan.md (file state is current in your context — no need to Read it back)
Fable
Now the patch files and supporting files.
Fable
⚙ Bash {"command": "mkdir -p /home/magik6k/lcad-wasm/porting/pyside-integrate/patches /home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/PySide6 /home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/shiboken6; echo ok", "description": "Create s…
tool result
ok
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0001-cmake-skip-host-python-probes.patch", "content": "Skip host-Python runtime probes for shiboken6/PySide6 when cross-compiling to\nwasm (EMSCRIPTEN). The host python…
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0001-cmake-skip-host-python-probes.patch (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0002-inittab-pyside-pairs.patch", "content": "Generate a second wasm inittab TU (WasmInittabPySide.cpp) that registers the\nstatically-linked PySide6/shiboken6 Python m…
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0002-inittab-pyside-pairs.patch (file state is current in your context — no need to Read it back)
Fable
thinking
Looking at the MainGui.cpp file to understand the structure around lines 150-205 so I can create an accurate patch.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/MainGui.cpp", "offset": 150, "limit": 55}
tool result
150	
151	#ifdef __EMSCRIPTEN__
152	#include <QtGlobal>
153	#include <cstdio>
154	// Generated WasmInittabGui.cpp: registers statically linked Python extension
155	// modules (App + Gui) before the interpreter is initialized.
156	void freecadWasmRegisterInittab();
157	
158	// Qt-for-wasm's default message handler runs Qt's message-pattern formatter
159	// (qFormatLogMessage), which throws std::bad_variant_access on this build and
160	// aborts the app the first time QEventDispatcherWasm emits a q  …[truncated]
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0003-maingui-call-pyside-inittab.patch", "content": "Register the statically-linked PySide6/shiboken6 Python modules on the wasm\ninterpreter's inittab BEFORE Py_Initia…
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0003-maingui-call-pyside-inittab.patch (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/WasmInittabPySide.reference.cpp", "content": "// Reference of the file GENERATED by src/Main/CMakeLists.txt\n// (freecad_wasm_generate_inittab_pairs) into the build dir as\n// …
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/WasmInittabPySide.reference.cpp (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/shiboken6/__init__.py", "content": "# Static-wasm shim for the shiboken6 package.\n#\n# In a normal PySide6 install this __init__.py adds the PySide6 shared-lib dir\n# to …
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/shiboken6/__init__.py (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/PySide6/__init__.py", "content": "# Static-wasm shim for the PySide6 package.\n#\n# The stock PySide6 __init__.py:\n# * appends the PySide6 shared-lib directory to the O…
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/PySide6/__init__.py (file state is current in your context — no need to Read it back)
Fable
thinking
Now I'm checking that everything's in place before presenting the final output.
Fable
⚙ Bash {"command": "find /home/magik6k/lcad-wasm/porting/pyside-integrate -type f | sort", "description": "List deliverables"}
tool result
/home/magik6k/lcad-wasm/porting/pyside-integrate/WasmInittabPySide.reference.cpp
/home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0001-cmake-skip-host-python-probes.patch
/home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0002-inittab-pyside-pairs.patch
/home/magik6k/lcad-wasm/porting/pyside-integrate/patches/0003-maingui-call-pyside-inittab.patch
/home/magik6k/lcad-wasm/porting/pyside-integrate/plan.md
/home/magik6k/lcad-wasm/porting/pyside-integrate/pyfs/PySide6/__init__.py
/home  …[truncated]
Fable
All deliverables are written. Returning the structured summary.
Fable
⚙ StructuredOutput {"slug": "pyside-integrate", "title": "Wire PySide6/shiboken6 into the FreeCAD wasm build", "feasibility": "needs-dep-port", "oneLineVerdict": "FreeCAD-side wiring is small and fully specified (2 flags, 2 DIRs, ~5 inittab lines, 3 patches, …
tool result
Structured output provided successfully