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=951610567f623512a88ac20b879e00d442f85abe'>root</a>/<a href='/guix/log/gnu?id=951610567f623512a88ac20b879e00d442f85abe'>gnu</a>/<a href='/guix/log/gnu/packages?id=951610567f623512a88ac20b879e00d442f85abe'>packages</a>/<a href='/guix/log/gnu/packages/openldap.scm?id=951610567f623512a88ac20b879e00d442f85abe'>openldap.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/packages/openldap.scm?id=951610567f623512a88ac20b879e00d442f85abe&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-10-19 13:11:40 -0400'>2020-10-19</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>Merge branch 'staging'</a><span class='msg-avail'>...<span class='msg-tooltip'>Conflicts:
	gnu/packages/admin.scm
	gnu/packages/commencement.scm
	gnu/packages/gdb.scm
	gnu/packages/llvm.scm
	gnu/packages/package-management.scm
	gnu/packages/tls.scm
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-09-22 18:41:58 +0200'>2020-09-22</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=758fb0478eb48ff173b0036beb27656c716b050d'>gnu: python-ldap: Update to 3.3.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openldap.scm (python-ldap): Update to 3.3.1.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-07-27 01:02:09 +0200'>2020-07-27</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=8f0ee2e351739171c9ffbf344ee59203111309e3'>gnu: openldap: Remove graft.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openldap.scm (openldap): Update to 2.4.50. Remove
  replacement.
  (openldap-2.4.50): Remove variable.
</span></span></td><td>Jakub Kądziołka</td></tr>
<tr><td><span title='2020-04-30 23:47:49 +0200'>2020-04-30</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=8bf8cd9b85c85be387565f6c8ca9f6c72196fb8e'>Merge branch 'master' into core-updates</a><span class='msg-avail'>...<span class='msg-tooltip'> Conflicts:
	gnu/local.mk
	gnu/packages/backup.scm
	gnu/packages/emacs-xyz.scm
	gnu/packages/guile.scm
	gnu/packages/lisp.scm
	gnu/packages/openldap.scm
	gnu/packages/package-management.scm
	gnu/packages/web.scm
	gnu/packages/xorg.scm
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-04-29 13:44:10 -0400'>2020-04-29</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=f224a8bb79cc3c9e5960227ffea5524eb666d34a'>gnu: OpenLDAP: Update to 2.4.50 [fixes CVE-2019-{13057,13565}].</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openldap.scm (openldap)[replacement]: Use openldap-2.4.50.
(openldap/fixed): Replace with ...
(openldap-2.4.50): ... new variable.
* gnu/packages/patches/openldap-CVE-2020-12243.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2020-04-28 22:52:20 +0300'>2020-04-28</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=0b25812872904d61024791778dae36636c52ded6'>gnu: openldap: Fix CVE-2020-12243.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openldap.scm (openldap)[replacement]: New field.
(openldap/fixed): New variable.
* gnu/packages/patches/openldap-CVE-2020-12243.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-03-13 00:18:25 +0100'>2020-03-13</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=6b5a2e58866dc3642a39bb14aea9a77c4019b806'>gnu: OpenLDAP: Remove unused input.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openldap.scm (openldap)[inputs]: Remove ICU4C.
</span></span></td><td>Marius Bakke</td></tr>