Handle duplicate classes due to DCS utilizing both upper and lower case

dcs/statics.py

@@ -1164,13 +1164,13 @@ class FarpHide_Dmed(unittype.StaticType):
         shape_name = "FarpHide_Dmed"
         rate = 3
 
-    class Container_40ft(unittype.StaticType):
+    class Container_40ft_(unittype.StaticType):
         id = "container_40ft"
         name = "Container 40ft"
         shape_name = "container_40ft"
         rate = 1
 
-    class Container_20ft(unittype.StaticType):
+    class Container_20ft_(unittype.StaticType):
         id = "container_20ft"
         name = "Container 20ft"
         shape_name = "container_20ft"
@@ -1538,8 +1538,8 @@ class Freya_Shelter_Concrete(unittype.StaticType):
     "FarpHide_Med": Fortification.FarpHide_Med,
     "FarpHide_Dsmall": Fortification.FarpHide_Dsmall,
     "FarpHide_Dmed": Fortification.FarpHide_Dmed,
-    "container_40ft": Fortification.Container_40ft,
-    "container_20ft": Fortification.Container_20ft,
+    "container_40ft": Fortification.Container_40ft_,
+    "container_20ft": Fortification.Container_20ft_,
     "FlagPole": Fortification.FlagPole,
     "warning_board_a": Fortification.Warning_board_a,
     "warning_board_b": Fortification.Warning_board_b,

tools/pydcs_export.lua

@@ -51,8 +51,17 @@ local function safe_name(name)
     return safeName
 end
 
+-- DCS will use both capitalized and lower case names for units.
+-- Keep track of used class names and suffix duplicate classes with underscore.
+local used_class_names = {}
 local function safe_class_name(name)
-    return safe_name(name):gsub("^%l", string.upper)
+	local safeName = safe_name(name)
+	local safeClassName = safeName:gsub("^%l", string.upper)
+	if used_class_names[safeClassName] ~= nil and used_class_names[safeClassName] ~= safeName then
+		safeClassName = safeClassName .. '_'
+	end
+	used_class_names[safeClassName] = safeName
+    return safeClassName
 end
 
 local function safe_display_name(name)