Make trytond add all paths listed in GUIX_TRYTOND_MODULES_PATH to sys.path.

*** a/trytond/modules/__init__.py	1970-01-01 01:00:01.000000000 +0100
--- b/trytond/modules/__init__.py	2021-12-02 22:17:28.014612267 +0100
***************
*** 31,36 ****
--- 31,48 ----
  
  EGG_MODULES = {}
  
+ def __extend_python_path__():
+     tryton_python_path = os.environ.get("GUIX_TRYTOND_MODULES_PATH")
+     if tryton_python_path:
+         paths = [path[:-16]  # remove "/trytond/modules"
+                  for path in tryton_python_path.split(os.pathsep)]
+         sys.path.extend(paths)
+         # ensure new paths are in the pkg_resources WorkingSet
+         import pkg_resources
+         list(map(pkg_resources.working_set.add_entry, paths))
+ 
+ __extend_python_path__()
+ 
  
  def update_egg_modules():
      global EGG_MODULES
l
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<div class='path'>path: <a href='/guix/log/?id=7bbb329060f56ea4a102d2d7d0900fa0daf20265'>root</a>/<a href='/guix/log/gnu?id=7bbb329060f56ea4a102d2d7d0900fa0daf20265'>gnu</a>/<a href='/guix/log/gnu/home?id=7bbb329060f56ea4a102d2d7d0900fa0daf20265'>home</a>/<a href='/guix/log/gnu/home/services?id=7bbb329060f56ea4a102d2d7d0900fa0daf20265'>services</a>/<a href='/guix/log/gnu/home/services/media.scm?id=7bbb329060f56ea4a102d2d7d0900fa0daf20265'>media.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/home/services/media.scm?id=7bbb329060f56ea4a102d2d7d0900fa0daf20265&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-03-16 23:03:17 +0100'>2023-03-16</span></td><td><a href='/guix/commit/gnu/home/services/media.scm?id=8f219e658d8d2d89a2d6ec10729099130791a3a2'>home: services: kodi, znc, ssh-agent: Use 'match-record'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/home/services/media.scm (home-kodi-services): Use 'match-record'
instead of 'match'.
* gnu/home/services/messaging.scm (home-znc-services): Likewise.
* gnu/home/services/ssh.scm (home-ssh-agent-services): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-16 17:23:51 +0100'>2023-03-16</span></td><td><a href='/guix/commit/gnu/home/services/media.scm?id=6afd1fd6bccf3093c6e7b29ed816ee0d5a10c537'>home: services: kodi: Remove host-side use of (shepherd support).</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 70056b1b2beebbc9f8ea2c34eacc57f379368ab3, which
inadvertently pulled in (shepherd support) on the host side.

* gnu/home/services/media.scm (home-kodi-services): Change 'command' and
'logfile' to gexps.  Add 'modules' field to 'shepherd-service'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-16 14:33:16 +0100'>2023-03-16</span></td><td><a href='/guix/commit/gnu/home/services/media.scm?id=70056b1b2beebbc9f8ea2c34eacc57f379368ab3'>gnu: home: services: Add home-kodi-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/home/services/media.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* po/guix/POTFILES.in: Likewise.
* doc/guix.texi (Media Home Services): Document it in new subsection.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>