BUG Fix for pack and local imports

If the Jugfile imports a function from a local file (which is then used
as a Task), this would not unpickle correctly as the unpickling is done
*before* loading the Jugfile

ChangeLog

@@ -1,5 +1,6 @@
 Unreleased
-	* Support for lambda functions in Tasklets
+	* Tasklet: Support for lambda functions in Tasklets
+	* pack: bugfix when using local imports
 
 Version 2.3.1 Sun 5 November 2023 by luispedro
 	* jug: update for Python 3.12

jug/backends/file_store.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Copyright (C) 2008-2022, Luis Pedro Coelho <luis@luispedro.org>
+# Copyright (C) 2008-2024, Luis Pedro Coelho <luis@luispedro.org>
 # vim: set ts=4 sts=4 sw=4 expandtab smartindent:
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -78,7 +78,9 @@ def __init__(self, dname, compress_numpy=False):
         self.packed = {}
         if path.exists(self._packfile()):
             with open(self._packfile(), 'rb') as pfile:
+                sys.path.insert(0, '.')
                 self.packed = decode_from(pfile)
+                del sys.path[0]
 
     def _packfile(self):
         return path.join(self.jugdir, 'packs', 'jugpack')

jug/jug_version.py

@@ -1,4 +1,4 @@
-__version__ = '2.3.1'
+__version__ = '2.4.0'
 CITATION = '''\
     Coelho, L.P., (2017). Jug: Software for Parallel Reproducible Computation in
     Python. Journal of Open Research Software. 5(1), p.30.