Fix issue preventing to use custom nested symbols. Fixes #1969

gns3server/controller/node.py

@@ -25,6 +25,7 @@ import os
 from .compute import ComputeConflict, ComputeError
 from .ports.port_factory import PortFactory, StandardPortFactory, DynamipsPortFactory
 from ..utils.images import images_directories
+from ..config import Config
 from ..utils.qt import qt_font_to_style
 
 
@@ -263,10 +264,12 @@ class Node:
         if val is None:
             val = ":/symbols/computer.svg"
 
-        # No abs path, fix them (bug of 1.X)
         try:
-            if not val.startswith(":") and os.path.abspath(val):
-                val = os.path.basename(val)
+            if not val.startswith(":") and os.path.isabs(val):
+                server_config = Config.instance().get_section_config("Server")
+                default_symbol_directory = os.path.expanduser(server_config.get("images_path", "~/GNS3/symbols"))
+                if os.path.commonprefix([default_symbol_directory, val]) != default_symbol_directory:
+                    val = os.path.basename(val)
         except OSError:
             pass