Hi, I'm working towards packaging pydevd (which is a recursive dependency of Spyder via IPython), and it's a somewhat challenging package! I have hit an issue and would appreciate some thoughts on how best to handle it.
Background: pydevd is a debugging package which can attach to running scripts. It is used by PyDev, PyCharm, VSCode and Spyder, and with Spyder, it is imported through debugpy, which in turn is imported into IPython. In order to ensure that the libraries it is using have not been modified by gevent, it uses vendored copies of various standard library modules rather than just saying "import inspect" etc. I thought I could address this issue by replacing the vendored copies of the library modules by symlinks to /usr/lib/python3.X/, but now I've hit another snag: some of these modules import other modules. For example: pydev_imps/_pydev_SimpleXMLRPCServer.py is a very old version of /usr/lib/python3.X/xmlrpc/server.py. It contains within it the following lines: from _pydev_imps import _pydev_xmlrpclib as xmlrpclib from _pydev_imps._pydev_xmlrpclib import Fault from _pydev_imps import _pydev_SocketServer as SocketServer from _pydev_imps import _pydev_BaseHTTPServer as BaseHTTPServer These libraries are: _pydev_imps._pydev_xmlrpclib -> xmlrpc.client _pydev_imps._pydev_SocketServer -> socketserver _pydev_imps._pydev_BaseHTTPServer -> http.server So what should I do? One solution is just to symlink from _pydev_SimpleXMLRPCServer.py to /usr/lib/python3.X/xmlrpc/server.py and not worry about the other modules. But that might break things in non-obvious ways, so I don't want to do that. Another possible solution is to update all of the vendored copies in _pydev_imps using the relevant /usr/lib/python3.X/* modules and making the same modifications to the imports to load local copies. But then we will have duplicate copies of standard library modules, which I also don't want to do. Perhaps another possibility is to have symlinks in the _pydev_imps directory to the standard library versions and then temporarily modify sys.path to look in _pydev_imps before looking in standard locations. I don't know whether this will work, though. (There is another snag, too, which is that the path will depend on the Python version. So I will probably have _pydev_imps/python_39/socketserver.py -> /usr/lib/python3.9/socketserver.py and _pydev_imps/python_310/socketserver.py -> /usr/lib/python3.10/socketserver.py But that's a simpler issue.) Any thoughts on these ideas would be much appreciated! Best wishes, Julian
