disable torch weight initialization and CLIP downloading/reading checkpoint to...

import ldm.modules.encoders.modules

import open_clip

import torch

class DisableInitialization:

    """

    When an object of this class enters a `with` block, it starts preventing torch's layer initialization

    functions from working, and changes CLIP and OpenCLIP to not download model weights. When it leaves,

    reverts everything to how it was.

    Use like this:

    ```

    with DisableInitialization():

        do_things()

    ```

    """

    def __enter__(self):

        def do_nothing(*args, **kwargs):

            pass

        def create_model_and_transforms_without_pretrained(*args, pretrained=None, **kwargs):

            return self.create_model_and_transforms(*args, pretrained=None, **kwargs)

        def CLIPTextModel_from_pretrained(pretrained_model_name_or_path, *model_args, **kwargs):

            return self.CLIPTextModel_from_pretrained(None, *model_args, config=pretrained_model_name_or_path, state_dict={}, **kwargs)

        self.init_kaiming_uniform = torch.nn.init.kaiming_uniform_

        self.init_no_grad_normal = torch.nn.init._no_grad_normal_

        self.create_model_and_transforms = open_clip.create_model_and_transforms

        self.CLIPTextModel_from_pretrained = ldm.modules.encoders.modules.CLIPTextModel.from_pretrained

        torch.nn.init.kaiming_uniform_ = do_nothing

        torch.nn.init._no_grad_normal_ = do_nothing

        open_clip.create_model_and_transforms = create_model_and_transforms_without_pretrained

        ldm.modules.encoders.modules.CLIPTextModel.from_pretrained = CLIPTextModel_from_pretrained

    def __exit__(self, exc_type, exc_val, exc_tb):

        torch.nn.init.kaiming_uniform_ = self.init_kaiming_uniform

        torch.nn.init._no_grad_normal_ = self.init_no_grad_normal

        open_clip.create_model_and_transforms = self.create_model_and_transforms

        ldm.modules.encoders.modules.CLIPTextModel.from_pretrained = self.CLIPTextModel_from_pretrained

from ldm.util import instantiate_from_config

from modules import shared, modelloader, devices, script_callbacks, sd_vae

from modules import shared, modelloader, devices, script_callbacks, sd_vae, sd_disable_initialization

from modules.paths import models_path

from modules.sd_hijack_inpainting import do_inpainting_hijack, should_hijack_inpainting

    if shared.cmd_opts.no_half:

        sd_config.model.params.unet_config.params.use_fp16 = False

    with sd_disable_initialization.DisableInitialization():

        sd_model = instantiate_from_config(sd_config.model)

    load_model_weights(sd_model, checkpoint_info)