Path: csiph.com!newsfeed.xs4all.nl!newsfeed9.news.xs4all.nl!bofh.it!news.nic.it!robomod
From: Julian Gilbey <julian@d-and-j.net>
Newsgroups: linux.debian.maint.python
Subject: Re: Advice wanted: handling weird vendoring situation
Date: Tue, 08 Feb 2022 08:10:01 +0100
Message-ID: <DOsNr-lBo-5@gated-at.bofh.it>
References: <DOjK9-fzz-1@gated-at.bofh.it>
X-Mailbox-Line: From debian-python-request@lists.debian.org  Tue Feb  8 07:04:22 2022
Old-Return-Path: <julian@d-and-j.net>
X-Amavis-Spam-Status: No, score=-5.407 tagged_above=-10000 required=5.3 tests=[BAYES_00=-2, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, LDO_WHITELIST=-5, RDNS_NONE=0.793, WORD_WITHOUT_VOWELS=1] autolearn=no autolearn_force=no
X-Policyd-Weight: using cached result; rate:hard:
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
X-Mailing-List: <debian-python@lists.debian.org> archive/latest/19748
List-ID: <debian-python.lists.debian.org>
List-URL: <https://lists.debian.org/debian-python/>
List-Archive: https://lists.debian.org/msgid-search/YgIV6US1LavT+KXS@d-and-j.net
Approved: robomod@news.nic.it
Lines: 36
Organization: linux.* mail to news gateway
Sender: robomod@news.nic.it
X-Original-Date: Tue, 8 Feb 2022 07:04:09 +0000
X-Original-Message-ID: <YgIV6US1LavT+KXS@d-and-j.net>
X-Original-References: <YgGOwKenQDWOKGOC@d-and-j.net>
Xref: csiph.com linux.debian.maint.python:13935

On Mon, Feb 07, 2022 at 09:27:28PM +0000, Julian Gilbey wrote:
> [...]
> 
> 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
> [...]
> 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.

I realise now that this "nice" solution won't work, as the standard
library code says:

import socketserver

so modifying sys.path will just change the value of
sys.modules["socketserver"].  However, the vendored code instead loads
this module to sys.modules["_pydev_imps._pydev_SocketServer"] or
something like that, deliberately avoiding interfering with
sys.modules["socketserver"].

Ho hum.

   Julian