fix(imaging): more reliable way to check if extra is installed

.secrets.baseline

@@ -137,7 +137,7 @@
         "filename": "src/starbridge/hello/service.py",
         "hashed_secret": "b96ff7d04dbdf5211aa6bf8ac3a557f30dc7469b",
         "is_verified": false,
-        "line_number": 119,
+        "line_number": 113,
         "is_secret": false
       }
     ],
@@ -152,5 +152,5 @@
       }
     ]
   },
-  "generated_at": "2024-12-28T14:44:42Z"
+  "generated_at": "2024-12-29T18:21:09Z"
 }

src/starbridge/__init__.py

@@ -31,6 +31,7 @@ def _parse_env_args():
 
 def _amend_library_path():
     """Patch environment variables before any other imports"""
+
     if "DYLD_FALLBACK_LIBRARY_PATH" not in os.environ:
         os.environ["DYLD_FALLBACK_LIBRARY_PATH"] = (
             f"{os.getenv('HOMEBREW_PREFIX', '/opt/homebrew')}/lib/"

src/starbridge/hello/service.py

@@ -1,18 +1,11 @@
 """Handles Hello operations."""
 
 import base64
+import imp
 import io
 import os
 
 from mcp.types import BlobResourceContents, EmbeddedResource
-
-try:
-    from PIL import Image
-
-    _has_imaging = True
-except ImportError:
-    _has_imaging = False
-
 from pydantic import AnyUrl
 
 from starbridge.mcp import MCPBaseService, MCPContext, mcp_tool
@@ -44,12 +37,13 @@ def hello(self, locale: str = "en_US", context: MCPContext | None = None):
             return "Hallo Welt!"
         return "Hello World!"
 
-    if _has_imaging:
+    if imp.find_module("cairosvg"):
 
         @mcp_tool()
         def bridge(self, context: MCPContext | None = None):
             """Show image of starbridge"""
             import cairosvg
+            from PIL import Image
 
             return Image.open(
                 io.BytesIO(