fix startup messages and a startup crash

- make the warnings about patchmatch less redundant
- only warn about being unable to load concepts from Hugging Face
  library once
- do not crash when unable to load concepts from Hugging Face
  due to network connectivity issues

ldm/invoke/concepts_lib.py

@@ -36,7 +36,7 @@ class Concepts(object):
             models = self.hf_api.list_models(filter=ModelFilter(model_name='sd-concepts-library/'))
             self.concept_list = [a.id.split('/')[1] for a in models]
         except Exception as e:
-            print(' ** WARNING: Hugging Face textual inversion concepts libraries could not be loaded. The error was {str(e)}.')
+            print(f' ** WARNING: Hugging Face textual inversion concepts libraries could not be loaded. The error was {str(e)}.')
             print(' ** You may load .bin and .pt file(s) manually using the --embedding_directory argument.')
         return self.concept_list
 

ldm/invoke/generator/inpaint.py

@@ -27,7 +27,7 @@ if Globals.try_patchmatch:
         print('>> Patchmatch initialized')
         infill_methods.append('patchmatch')
     else:
-        print('>> Patchmatch not loaded, please see https://github.com/invoke-ai/InvokeAI/blob/patchmatch-install-docs/docs/installation/INSTALL_PATCHMATCH.md')
+        print('>> Patchmatch not loaded (nonfatal)')
 else:
     print('>> Patchmatch loading disabled')
 

ldm/invoke/readline.py

@@ -101,7 +101,7 @@ class Completer(object):
         self.linebuffer  = None
         self.auto_history_active = True
         self.extensions = None
-        self.concepts = Concepts().list_concepts()
+        self.concepts = None
         return
 
     def complete(self, text, state):
@@ -271,7 +271,8 @@ class Completer(object):
 
     def add_embedding_terms(self, terms:list[str]):
         self.concepts = Concepts().list_concepts()
-        self.concepts.extend(terms)
+        if self.concepts:
+            self.concepts.extend(terms)
 
     def _concept_completions(self, text, state):
         partial = text[1:]  # this removes the leading '<'