pixi: add code to update git_version & fix version handling, config_example import

Author: briantoby

GSASII/GSASIIGUI.py

@@ -11,11 +11,13 @@
 
 from . import GSASIIpath
 
-__version__ = '2.0.0'
+__version__ = '5.0.0'
 try:
     from . import git_verinfo
-    __version__ = git_verinfo.git_tags[0]
-    if not __version__: __version__ = git_verinfo.git_prevtags[0]
+    if len(git_verinfo.git_tags):
+        __version__ = git_verinfo.git_tags[0]
+    elif len(git_verinfo.git_prevtags):
+        __version__ = git_verinfo.git_prevtags[0]
 except ImportError:
     pass
 

GSASII/GSASIIpath.py

@@ -143,7 +143,7 @@ def GetBinaryPrefix(pyver=None):
     linux_64_p3.9_n1.21).
 
     Note that any change made here is also needed in GetBinaryDir in
-    fsource/SConstruct
+    fsource/SConstruct or GSASII-buildtools/compile/nameTar.py
     '''
     if sys.platform == "win32":
         prefix = 'win'
@@ -1174,7 +1174,7 @@ def LoadConfig(printInfo=True):
         print(f'N.B. Configuration file {cfgfile} does not exist')
         return
     try:
-        import config_example
+        from . import config_example
     except ImportError as err:
         print("Error importing config_example.py file\n",err)
         return