applyed the patch by Bruno Postle

src/blenderbim/blenderbim/bim/module/ifcgit/__init__.py

@@ -33,15 +33,15 @@ from . import ui, prop, operator
 #     }
 
 classes = (
-        operators.AddFileToRepo,
-        operators.CommitChanges,
-        operators.CreateRepo,
-        operators.DiscardUncommitted,
-        operators.DisplayRevision,
-        operators.DisplayUncommitted,
-        operators.Merge,
-        operators.RefreshGit,
-        operators.SwitchRevision,
+        operator.AddFileToRepo,
+        operator.CommitChanges,
+        operator.CreateRepo,
+        operator.DiscardUncommitted,
+        operator.DisplayRevision,
+        operator.DisplayUncommitted,
+        operator.Merge,
+        operator.RefreshGit,
+        operator.SwitchRevision,
         prop.IfcGitListItem,
         prop.IfcGitProperties,
         ui.IFCGIT_PT_panel,

src/blenderbim/blenderbim/bim/module/ifcgit/operator.py

@@ -3,12 +3,7 @@ import re
 import bpy
 import blenderbim.core.ifcgit as core
 import blenderbim.tool as tool
-# from tool import IfcGit as tool
-from data import IfcGitData
-
-# import handler
-
-# import blenderbim.tool as tool
+from blenderbim.bim.module.ifcgit.data import IfcGitData, refresh
 
 
 class CreateRepo(bpy.types.Operator):
@@ -34,7 +29,7 @@ class CreateRepo(bpy.types.Operator):
     def execute(self, context):
 
         core.create_repo(tool.IfcGit, tool.Ifc)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -58,7 +53,7 @@ class AddFileToRepo(bpy.types.Operator):
     def execute(self, context):
 
         core.add_file(tool.IfcGit, tool.Ifc)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -72,7 +67,7 @@ class DiscardUncommitted(bpy.types.Operator):
     def execute(self, context):
 
         core.discard_uncomitted(tool.IfcGit, tool.Ifc)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -107,7 +102,7 @@ class CommitChanges(bpy.types.Operator):
 
         repo = IfcGitData.data["repo"]
         core.commit_changes(tool.IfcGit, tool.Ifc, repo, context)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -129,7 +124,7 @@ class RefreshGit(bpy.types.Operator):
 
         repo = IfcGitData.data["repo"]
         core.refresh_revision_list(tool.IfcGit, repo, tool.Ifc)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -143,7 +138,7 @@ class DisplayRevision(bpy.types.Operator):
     def execute(self, context):
 
         core.colourise_revision(tool.IfcGit, context)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -158,7 +153,7 @@ class DisplayUncommitted(bpy.types.Operator):
 
         repo = IfcGitData.data["repo"]
         core.colourise_uncommitted(tool.IfcGit, tool.Ifc, repo)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -172,7 +167,7 @@ class SwitchRevision(bpy.types.Operator):
     def execute(self, context):
 
         core.switch_revision(tool.IfcGit, tool.Ifc)
-        handler.refresh_ui_data()
+        refresh()
         return {"FINISHED"}
 
 
@@ -192,7 +187,7 @@ class Merge(bpy.types.Operator):
     def execute(self, context):
 
         if core.merge_branch(tool.IfcGit, tool.Ifc, self):
-            handler.refresh_ui_data()
+            refresh()
             return {"FINISHED"}
         else:
             return {"CANCELLED"}

src/blenderbim/blenderbim/bim/module/ifcgit/prop.py

@@ -7,7 +7,7 @@ from bpy.props import (
     IntProperty,
     EnumProperty,
 )
-from data import IfcGitData
+from blenderbim.bim.module.ifcgit.data import IfcGitData, refresh
 
 
 def git_branches(self, context):

src/blenderbim/blenderbim/bim/module/ifcgit/ui.py

@@ -1,6 +1,6 @@
 import bpy
 import time
-from data import IfcGitData
+from blenderbim.bim.module.ifcgit.data import IfcGitData, refresh
 
 
 class IFCGIT_PT_panel(bpy.types.Panel):

src/blenderbim/blenderbim/tool/__init__.py

@@ -30,6 +30,8 @@ from blenderbim.tool.drawing import Drawing
 from blenderbim.tool.geometry import Geometry
 from blenderbim.tool.georeference import Georeference
 from blenderbim.tool.ifc import Ifc
+from blenderbim.tool.ifcgit import IfcGit
+from blenderbim.tool.ifcgit import IfcGitRepo
 from blenderbim.tool.library import Library
 from blenderbim.tool.loader import Loader
 from blenderbim.tool.material import Material