FreeCAD WebAssembly development snapshot

contrib/.vscode/scripts/VSCodeAutostartDebug.FCMacro

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+import debugpy
+from multiprocessing.connection import Listener
+from freecad.utils import get_python_exe
+
+# get_python_exe is needed because debugpy needs a python interpreter to work.
+# It does not have to be FC embedded interpreter.
+# By default it attempts to use Freecad's PID mistaking it for python.
+# https://github.com/microsoft/debugpy/issues/262
+debugpy.configure(python=get_python_exe())
+# As of Python 3.12, debugpy runs a forwarding process that listens both on the port specified here for the debugger
+# to connect to, but also on an internal port for the underlying pydevd within the python process to connect to.  The
+# default for that internal port is 5678, so we need to not duplicate it for the external port.  Also, on Linux the
+# attempt to spawn the forwarding process separately fails, so we force it to be internal to our main process.
+debugpy.listen(('localhost', 5679),in_process_debug_adapter=True)
+
+# Turns out you cannot probe debugpy to see if it is up:
+# https://github.com/microsoft/debugpy/issues/974
+# Open another port that the script WaitForDebugpy can probe to see if
+# debugpy is running
+listener = Listener(('localhost', 39999), backlog=10)
+
+debugpy.wait_for_client()

contrib/.vscode/scripts/WaitForDebugpy.py

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+import socket
+from contextlib import closing
+import time
+
+TIMEOUT_TIME_S = 30
+RETRY_DELAY_S = 0.1
+
+MAX_ATTEMPTS = TIMEOUT_TIME_S / RETRY_DELAY_S
+
+def check_socket(host, port):
+    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
+        sock.settimeout(RETRY_DELAY_S)
+        return sock.connect_ex((host, port)) == 0
+
+def main():
+    # DO NOT CHECK the actual port 5678/5879 or debugpy will break
+    # Check that the other port 39999 used as a flag is manually opened instead
+    attempt_counter = 0
+    while (not check_socket('localhost', 39999)) and attempt_counter < MAX_ATTEMPTS:
+        time.sleep(RETRY_DELAY_S)
+        attempt_counter += 1
+
+    if attempt_counter >= MAX_ATTEMPTS:
+        exit(1)
+    else:
+        exit(0)
+
+if __name__ == "__main__":
+    main()