fix ckpt_convert module to work with dreambooth v2 models

- Discord member @marcus.llewellyn reported that some civitai 2.1-derived checkpoints were
  not converting properly (probably dreambooth-generated):
  https://discord.com/channels/1020123559063990373/1078386197589655582/1078387806122025070

- @blessedcoolant tracked this down to a missing key that was used to
  derive vector length of the CLIP model used by fetching the second
  dimension of the tensor at "cond_stage_model.model.text_projection".
  His proposed solution was to hardcode a value of 1024.

- On inspection, I found that the same second dimension can be
  recovered from key 'cond_stage_model.model.ln_final.bias', and use
  that instead. I hope this is correct; tested on multiple v1, v2 and
  inpainting models and they converted correctly.

- While debugging this, I found and fixed several other issues:

  - model download script was not pre-downloading the OpenCLIP
    text_encoder or text_tokenizer. This is fixed.
  - got rid of legacy code in `ckpt_to_diffuser.py` and replaced
    with calls into `model_manager`
  - more consistent status reporting in the CLI.

ldm/invoke/CLI.py

@@ -625,7 +625,7 @@ def set_default_output_dir(opt: Args, completer: Completer):
     completer.set_default_dir(opt.outdir)
 
 
-def import_model(model_path: str, gen, opt, completer, convert=False) -> str:
+def import_model(model_path: str, gen, opt, completer, convert=False):
     """
     model_path can be (1) a URL to a .ckpt file; (2) a local .ckpt file path;
     (3) a huggingface repository id; or (4) a local directory containing a
@@ -679,7 +679,7 @@ def _verify_load(model_name: str, gen) -> bool:
     current_model = gen.model_name
     try:
         if not gen.set_model(model_name):
-            return False
+            return
     except Exception as e:
         print(f"** model failed to load: {str(e)}")
         print(
@@ -706,7 +706,7 @@ def _get_model_name_and_desc(
     )
     return model_name, model_description
 
-def convert_model(model_name_or_path: Union[Path, str], gen, opt, completer) -> str:
+def convert_model(model_name_or_path: Union[Path, str], gen, opt, completer):
     model_name_or_path = model_name_or_path.replace("\\", "/")  # windows
     manager = gen.model_manager
     ckpt_path = None
@@ -740,19 +740,14 @@ def convert_model(model_name_or_path: Union[Path, str], gen, opt, completer) ->
         )
     else:
         try:
-            model_name = import_model(model_name_or_path, gen, opt, completer, convert=True)
+            import_model(model_name_or_path, gen, opt, completer, convert=True)
         except KeyboardInterrupt:
             return
 
-    if not model_name:
-        print("** Conversion failed. Aborting.")
-        return
-
     manager.commit(opt.conf)    
     if click.confirm(f"Delete the original .ckpt file at {ckpt_path}?", default=False):
         ckpt_path.unlink(missing_ok=True)
         print(f"{ckpt_path} deleted")
-    return model_name
 
 
 def del_config(model_name: str, gen, opt, completer):

ldm/invoke/ckpt_to_diffuser.py

@@ -17,16 +17,15 @@
 # Original file at: https://github.com/huggingface/diffusers/blob/main/scripts/convert_ldm_original_checkpoint_to_diffusers.py
 """ Conversion script for the LDM checkpoints. """
 
-import os
 import re
 import torch
 import warnings
 from pathlib import Path
 from ldm.invoke.globals import (
-    Globals,
     global_cache_dir,
     global_config_dir,
     )
+from ldm.invoke.model_manager import ModelManager, SDLegacyType
 from safetensors.torch import load_file
 from typing import Union
 
@@ -760,7 +759,12 @@ def convert_open_clip_checkpoint(checkpoint):
 
     text_model_dict = {}
 
-    d_model = int(checkpoint["cond_stage_model.model.text_projection"].shape[0])
+    if 'cond_stage_model.model.text_projection' in keys:
+        d_model = int(checkpoint["cond_stage_model.model.text_projection"].shape[0])
+    elif 'cond_stage_model.model.ln_final.bias' in keys:
+        d_model = int(checkpoint['cond_stage_model.model.ln_final.bias'].shape[0])
+    else:
+        raise KeyError('Expected key "cond_stage_model.model.text_projection" not found in model')
 
     text_model_dict["text_model.embeddings.position_ids"] = text_model.text_model.embeddings.get_buffer("position_ids")
 
@@ -856,20 +860,23 @@ def load_pipeline_from_original_stable_diffusion_ckpt(
 
         upcast_attention = False
         if original_config_file is None:
-            key_name = "model.diffusion_model.input_blocks.2.1.transformer_blocks.0.attn2.to_k.weight"
+            model_type = ModelManager.probe_model_type(checkpoint)
-
+            
-            if key_name in checkpoint and checkpoint[key_name].shape[-1] == 1024:
+            if model_type == SDLegacyType.V2:
                 original_config_file = global_config_dir() / 'stable-diffusion' / 'v2-inference-v.yaml'
-
                 if global_step == 110000:
                     # v2.1 needs to upcast attention
                     upcast_attention = True
-            elif str(checkpoint_path).lower().find('inpaint') >= 0: # brittle - please pass original_config_file parameter!
+                    
-                print(f'  | checkpoint has "inpaint" in name, assuming an inpainting model')
+            elif model_type == SDLegacyType.V1_INPAINT:
                 original_config_file = global_config_dir() / 'stable-diffusion' / 'v1-inpainting-inference.yaml'
-            else:
+                
+            elif model_type == SDLegacyType.V1:
                 original_config_file = global_config_dir() / 'stable-diffusion' / 'v1-inference.yaml'
 
+            else:
+                raise Exception('Unknown checkpoint type')
+
         original_config = OmegaConf.load(original_config_file)
 
         if num_in_channels is not None:
@@ -960,7 +967,7 @@ def load_pipeline_from_original_stable_diffusion_ckpt(
             text_model = convert_open_clip_checkpoint(checkpoint)
             tokenizer = CLIPTokenizer.from_pretrained("stabilityai/stable-diffusion-2",
                                                       subfolder="tokenizer",
-                                                      cache_dir=global_cache_dir('diffusers')
+                                                      cache_dir=cache_dir,
                                                       )
             pipe = pipeline_class(
                 vae=vae,

ldm/invoke/config/invokeai_configure.py

@@ -191,14 +191,18 @@ def download_bert():
 
 
 # ---------------------------------------------
-def download_clip():
+def download_sd1_clip():
-    print("Installing CLIP model...", file=sys.stderr)
+    print("Installing SD1 clip model...", file=sys.stderr)
     version = "openai/clip-vit-large-patch14"
-    print("Tokenizer...", file=sys.stderr)
     download_from_hf(CLIPTokenizer, version)
-    print("Text model...", file=sys.stderr)
     download_from_hf(CLIPTextModel, version)
 
+# ---------------------------------------------
+def download_sd2_clip():
+    version = 'stabilityai/stable-diffusion-2'
+    print("Installing SD2 clip model...", file=sys.stderr)
+    download_from_hf(CLIPTokenizer, version, subfolder='tokenizer')
+    download_from_hf(CLIPTextModel, version, subfolder='text_encoder')
 
 # ---------------------------------------------
 def download_realesrgan():
@@ -832,7 +836,8 @@ def main():
         else:
             print("\n** DOWNLOADING SUPPORT MODELS **")
             download_bert()
-            download_clip()
+            download_sd1_clip()
+            download_sd2_clip()
             download_realesrgan()
             download_gfpgan()
             download_codeformer()

ldm/invoke/model_manager.py

@@ -725,7 +725,7 @@ class ModelManager(object):
         SDLegacyType.V1
         SDLegacyType.V1_INPAINT
         SDLegacyType.V2
-        UNKNOWN
+        SDLegacyType.UNKNOWN
         """
         key_name = "model.diffusion_model.input_blocks.2.1.transformer_blocks.0.attn2.to_k.weight"
         if key_name in checkpoint and checkpoint[key_name].shape[-1] == 1024:
@@ -785,7 +785,7 @@ class ModelManager(object):
         print(f">> Probing {thing} for import")
 
         if thing.startswith(("http:", "https:", "ftp:")):
-            print(f"   | {thing} appears to be a URL")
+            print(f"  | {thing} appears to be a URL")
             model_path = self._resolve_path(
                 thing, "models/ldm/stable-diffusion-v1"
             )  # _resolve_path does a download if needed
@@ -793,15 +793,15 @@ class ModelManager(object):
         elif Path(thing).is_file() and thing.endswith((".ckpt", ".safetensors")):
             if Path(thing).stem in ["model", "diffusion_pytorch_model"]:
                 print(
-                    f"   | {Path(thing).name} appears to be part of a diffusers model. Skipping import"
+                    f"  | {Path(thing).name} appears to be part of a diffusers model. Skipping import"
                 )
                 return
             else:
-                print(f"   | {thing} appears to be a checkpoint file on disk")
+                print(f"  | {thing} appears to be a checkpoint file on disk")
                 model_path = self._resolve_path(thing, "models/ldm/stable-diffusion-v1")
 
         elif Path(thing).is_dir() and Path(thing, "model_index.json").exists():
-            print(f"   | {thing} appears to be a diffusers file on disk")
+            print(f"  | {thing} appears to be a diffusers file on disk")
             model_name = self.import_diffuser_model(
                 thing,
                 vae=dict(repo_id="stabilityai/sd-vae-ft-mse"),
@@ -812,13 +812,13 @@ class ModelManager(object):
 
         elif Path(thing).is_dir():
             if (Path(thing) / "model_index.json").exists():
-                print(f">> {thing} appears to be a diffusers model.")
+                print(f"  | {thing} appears to be a diffusers model.")
                 model_name = self.import_diffuser_model(
                     thing, commit_to_conf=commit_to_conf
                 )
             else:
                 print(
-                    f">> {thing} appears to be a directory. Will scan for models to import"
+                    f"  |{thing} appears to be a directory. Will scan for models to import"
                 )
                 for m in list(Path(thing).rglob("*.ckpt")) + list(
                     Path(thing).rglob("*.safetensors")
@@ -830,7 +830,7 @@ class ModelManager(object):
                 return model_name
 
         elif re.match(r"^[\w.+-]+/[\w.+-]+$", thing):
-            print(f"   | {thing} appears to be a HuggingFace diffusers repo_id")
+            print(f"  | {thing} appears to be a HuggingFace diffusers repo_id")
             model_name = self.import_diffuser_model(
                 thing, commit_to_conf=commit_to_conf
             )
@@ -847,7 +847,7 @@ class ModelManager(object):
             return
 
         if model_path.stem in self.config:  # already imported
-            print("   | Already imported. Skipping")
+            print("  | Already imported. Skipping")
             return
 
         # another round of heuristics to guess the correct config file.
@@ -860,18 +860,18 @@ class ModelManager(object):
 
         model_config_file = None
         if model_type == SDLegacyType.V1:
-            print("   | SD-v1 model detected")
+            print("  | SD-v1 model detected")
             model_config_file = Path(
                 Globals.root, "configs/stable-diffusion/v1-inference.yaml"
             )
         elif model_type == SDLegacyType.V1_INPAINT:
-            print("   | SD-v1 inpainting model detected")
+            print("  | SD-v1 inpainting model detected")
             model_config_file = Path(
                 Globals.root, "configs/stable-diffusion/v1-inpainting-inference.yaml"
             )
         elif model_type == SDLegacyType.V2:
             print(
-                "   | SD-v2 model detected; model will be converted to diffusers format"
+                "  | SD-v2 model detected; model will be converted to diffusers format"
             )
             model_config_file = Path(
                 Globals.root, "configs/stable-diffusion/v2-inference-v.yaml"
@@ -923,7 +923,7 @@ class ModelManager(object):
         vae=None,
         original_config_file: Path = None,
         commit_to_conf: Path = None,
-    ) -> dict:
+    ) -> str:
         """
         Convert a legacy ckpt weights file to diffuser model and import
         into models.yaml.