Use reversed approach for splitting references

kikit/common.py

@@ -325,6 +325,14 @@ def splitOn(input: str, predicate: Callable[[str], bool]) \
             break
     return left, input[i:]
 
+def splitOnReverse(input: str, predicate: Callable[[str], bool]) \
+        -> Tuple[str, str]:
+    """
+    Split a string into a tail fullfilling predicate and the remaning head
+    """
+    tail, head = splitOn(input[::-1], predicate)
+    return head[::-1], tail[::-1]
+
 def indexOf(list, predicate):
     """
     Return the index of the first element that satisfies predicate. If no

kikit/fab/common.py

@@ -236,5 +236,5 @@ def expandNameTemplate(template: str, filetype: str, board: pcbnew.BOARD) -> str
         raise RuntimeError(f"Unknown variable {e} in --nametemplate: {template}")
 
 def naturalComponentKey(reference: str) -> Tuple[str, int]:
-    text, num = splitOn(reference, lambda x: not x.isdigit())
+    text, num = splitOnReverse(reference, lambda x: x.isdigit())
     return str(text), int(num)