[ENH] Restructure the project.

utils/merge.py

@@ -0,0 +1,51 @@
+import os
+
+import torch
+import transformers
+from peft import PeftModel
+from transformers import LlamaForCausalLM, LlamaTokenizer  # noqa: F402
+
+BASE_MODEL = os.environ.get("BASE_MODEL", None)
+assert (
+    BASE_MODEL
+), "Please specify a value for BASE_MODEL environment variable, e.g. `export BASE_MODEL=huggyllama/llama-7b`"  # noqa: E501
+
+tokenizer = LlamaTokenizer.from_pretrained(BASE_MODEL)
+
+base_model = LlamaForCausalLM.from_pretrained(
+    BASE_MODEL,
+    load_in_8bit=False,
+    torch_dtype=torch.float16,
+    device_map={"": "cpu"},
+)
+
+first_weight = base_model.model.layers[0].self_attn.q_proj.weight
+first_weight_old = first_weight.clone()
+
+lora_model = PeftModel.from_pretrained(
+    base_model,
+    "../outputs/lora-llama-clm-e2",
+    device_map={"": "cpu"},
+    torch_dtype=torch.float16,
+)
+
+lora_weight = lora_model.base_model.model.model.layers[0].self_attn.q_proj.weight
+
+assert torch.allclose(first_weight_old, first_weight)
+
+# merge weights - new merging method from peft
+lora_model = lora_model.merge_and_unload()
+
+lora_model.train(False)
+
+# did we do anything?
+assert not torch.allclose(first_weight_old, first_weight)
+
+lora_model_sd = lora_model.state_dict()
+deloreanized_sd = {
+    k.replace("base_model.model.", ""): v
+    for k, v in lora_model_sd.items()
+    if "lora" not in k
+}
+
+LlamaForCausalLM.save_pretrained(base_model, '../models/legal-base-7b', state_dict=deloreanized_sd, max_shard_size="400MB")