Clip RAM and VRAM to maximum system values

- Prevent a crash in `configure_invokeai` when user has manually set
  RAM or VRAM cache sizes to larger than the size available on system.

- Remove redundant imports from `invokeai.frontend.config.__init__.py`
  which were contributing to circular dependencies.

invokeai/backend/install/invokeai_configure.py

@@ -21,7 +21,6 @@ from argparse import Namespace
 from enum import Enum
 from pathlib import Path
 from shutil import get_terminal_size
-from typing import get_type_hints
 from urllib import request
 
 import npyscreen
@@ -399,7 +398,7 @@ Use cursor arrows to make a checkbox selection, and space to toggle.
         self.max_cache_size = self.add_widget_intelligent(
             IntTitleSlider,
             name="RAM cache size (GB). Make this at least large enough to hold a single full model.",
-            value=old_opts.max_cache_size,
+            value=clip(old_opts.max_cache_size, range=(3.0, MAX_RAM)),
             out_of=MAX_RAM,
             lowest=3,
             begin_entry_at=6,
@@ -418,7 +417,7 @@ Use cursor arrows to make a checkbox selection, and space to toggle.
             self.nextrely -= 1
             self.max_vram_cache_size = self.add_widget_intelligent(
                 npyscreen.Slider,
-                value=old_opts.max_vram_cache_size,
+                value=clip(old_opts.max_vram_cache_size, range=(0, MAX_VRAM)),
                 out_of=round(MAX_VRAM * 2) / 2,
                 lowest=0.0,
                 relx=8,
@@ -596,6 +595,16 @@ def default_user_selections(program_opts: Namespace) -> InstallSelections:
     )
 
 
+# -------------------------------------
+def clip(value: float, range: tuple[float, float]) -> float:
+    minimum, maximum = range
+    if value < minimum:
+        value = minimum
+    if value > maximum:
+        value = maximum
+    return value
+
+
 # -------------------------------------
 def initialize_rootdir(root: Path, yes_to_all: bool = False):
     logger.info("Initializing InvokeAI runtime directory")

invokeai/backend/install/migrate_to_3.py

@@ -591,7 +591,6 @@ script, which will perform a full upgrade in place.""",
     # TODO: revisit - don't rely on invokeai.yaml to exist yet!
     dest_is_setup = (dest_root / "models/core").exists() and (dest_root / "databases").exists()
     if not dest_is_setup:
-        import invokeai.frontend.install.invokeai_configure
         from invokeai.backend.install.invokeai_configure import initialize_rootdir
 
         initialize_rootdir(dest_root, True)

invokeai/frontend/install/__init__.py

@@ -1,6 +1,3 @@
 """
 Initialization file for invokeai.frontend.config
 """
-from .invokeai_configure import main as invokeai_configure
-from .invokeai_update import main as invokeai_update
-from .model_install import main as invokeai_model_install

invokeai/frontend/install/invokeai_configure.py

@@ -1,4 +1,4 @@
 """
 Wrapper for invokeai.backend.configure.invokeai_configure
 """
-from ...backend.install.invokeai_configure import main
+from ...backend.install.invokeai_configure import main as invokeai_configure

pyproject.toml

@@ -118,7 +118,7 @@ dependencies = [
 [project.scripts]
 
 # legacy entrypoints; provided for backwards compatibility
-"configure_invokeai.py" = "invokeai.frontend.install:invokeai_configure"
+"configure_invokeai.py" = "invokeai.frontend.install.invokeai_configure:invokeai_configure"
 "textual_inversion.py" = "invokeai.frontend.training:invokeai_textual_inversion"
 
 # shortcut commands to start cli and web
@@ -130,12 +130,12 @@ dependencies = [
 "invokeai-web" = "invokeai.app.api_app:invoke_api"
 
 # full commands
-"invokeai-configure" = "invokeai.frontend.install:invokeai_configure"
+"invokeai-configure" = "invokeai.frontend.install.invokeai_configure:invokeai_configure"
 "invokeai-merge" = "invokeai.frontend.merge:invokeai_merge_diffusers"
 "invokeai-ti" = "invokeai.frontend.training:invokeai_textual_inversion"
-"invokeai-model-install" = "invokeai.frontend.install:invokeai_model_install"
+"invokeai-model-install" = "invokeai.frontend.install.model_install:main"
 "invokeai-migrate3" = "invokeai.backend.install.migrate_to_3:main"
-"invokeai-update" = "invokeai.frontend.install:invokeai_update"
+"invokeai-update" = "invokeai.frontend.install.invokeai_update:main"
 "invokeai-metadata" = "invokeai.frontend.CLI.sd_metadata:print_metadata"
 "invokeai-node-cli" = "invokeai.app.cli_app:invoke_cli"
 "invokeai-node-web" = "invokeai.app.api_app:invoke_api"