Allow changing folder_paths.base_path via command line argument. (#6600)

* Reimpl. CLI arg directly inside folder_paths.

* Update tests to use CLI arg mocking.

* Revert last-minute refactor.

* Fix test state polution.

tests-unit/comfy_test/folder_path_test.py

@@ -1,19 +1,23 @@
 ### 🗻 This file is created through the spirit of Mount Fuji at its peak
 # TODO(yoland): clean up this after I get back down
+import sys
 import pytest
 import os
 import tempfile
 from unittest.mock import patch
+from importlib import reload
 
 import folder_paths
+import comfy.cli_args
+from comfy.options import enable_args_parsing
+enable_args_parsing()
+
 
 @pytest.fixture()
 def clear_folder_paths():
-    # Clear the global dictionary before each test to ensure isolation
-    original = folder_paths.folder_names_and_paths.copy()
-    folder_paths.folder_names_and_paths.clear()
+    # Reload the module after each test to ensure isolation
     yield
-    folder_paths.folder_names_and_paths = original
+    reload(folder_paths)
 
 @pytest.fixture
 def temp_dir():
@@ -21,7 +25,21 @@ def temp_dir():
         yield tmpdirname
 
 
-def test_get_directory_by_type():
+@pytest.fixture
+def set_base_dir():
+    def _set_base_dir(base_dir):
+        # Mock CLI args
+        with patch.object(sys, 'argv', ["main.py", "--base-directory", base_dir]):
+            reload(comfy.cli_args)
+            reload(folder_paths)
+    yield _set_base_dir
+    # Reload the modules after each test to ensure isolation
+    with patch.object(sys, 'argv', ["main.py"]):
+        reload(comfy.cli_args)
+        reload(folder_paths)
+
+
+def test_get_directory_by_type(clear_folder_paths):
     test_dir = "/test/dir"
     folder_paths.set_output_directory(test_dir)
     assert folder_paths.get_directory_by_type("output") == test_dir
@@ -96,3 +114,49 @@ def test_get_save_image_path(temp_dir):
         assert counter == 1
         assert subfolder == ""
         assert filename_prefix == "test"
+
+
+def test_base_path_changes(set_base_dir):
+    test_dir = os.path.abspath("/test/dir")
+    set_base_dir(test_dir)
+
+    assert folder_paths.base_path == test_dir
+    assert folder_paths.models_dir == os.path.join(test_dir, "models")
+    assert folder_paths.input_directory == os.path.join(test_dir, "input")
+    assert folder_paths.output_directory == os.path.join(test_dir, "output")
+    assert folder_paths.temp_directory == os.path.join(test_dir, "temp")
+    assert folder_paths.user_directory == os.path.join(test_dir, "user")
+
+    assert os.path.join(test_dir, "custom_nodes") in folder_paths.get_folder_paths("custom_nodes")
+
+    for name in ["checkpoints", "loras", "vae", "configs", "embeddings", "controlnet", "classifiers"]:
+        assert folder_paths.get_folder_paths(name)[0] == os.path.join(test_dir, "models", name)
+
+
+def test_base_path_change_clears_old(set_base_dir):
+    test_dir = os.path.abspath("/test/dir")
+    set_base_dir(test_dir)
+
+    assert len(folder_paths.get_folder_paths("custom_nodes")) == 1
+
+    single_model_paths = [
+        "checkpoints",
+        "loras",
+        "vae",
+        "configs",
+        "clip_vision",
+        "style_models",
+        "diffusers",
+        "vae_approx",
+        "gligen",
+        "upscale_models",
+        "embeddings",
+        "hypernetworks",
+        "photomaker",
+        "classifiers",
+    ]
+    for name in single_model_paths:
+        assert len(folder_paths.get_folder_paths(name)) == 1
+
+    for name in ["controlnet", "diffusion_models", "text_encoders"]:
+        assert len(folder_paths.get_folder_paths(name)) == 2