ERP5VCS: Fix removal of hidden files and folders while exporting Business Template

product/ERP5VCS/WorkingCopy.py

@@ -396,6 +396,16 @@ class BusinessTemplateWorkingCopy(BusinessTemplateFolder):
     removed_set = set()
     prefix_length = len(os.path.join(self.path, ''))
     for dirpath, dirnames, filenames in os.walk(self.path):
+      # Do not remove hidden files and folders.
+      # This is important as we primarily use ERP5 VCS for Business Templates
+      # and sometimes they can be in form of git submodule. Removing `.git`
+      # leads to the case where we want to check from parent repo (i.e. erp5)
+      # if there is an existence of gitsubmodule and then update it explicitly.
+      # This ends up taking an extra effort and conflict as the new `.git`
+      # might have conflicting history depending on when we re-init/udpate
+      # the submodule
+      filenames = [f for f in filenames if not f[0] == '.']
+      dirnames[:] = [d for d in dirnames if not d[0] == '.']
       dirpath = dirpath[prefix_length:]
       for i in xrange(len(dirnames) - 1, -1, -1):
         d = dirnames[i]