Add way to call consolidate (#80)

* Add way to call consolidate

* black

* isort

---------

Co-authored-by: Srini Iyer <sviyer@meta.com>

bytelatent/checkpoint.py

@@ -12,6 +12,7 @@ import torch.distributed as dist
 import torch.distributed.checkpoint as dcp
 import torch.nn as nn
 import torch.optim.optimizer
+import typer
 from pydantic import BaseModel, ConfigDict
 from torch.distributed._tensor import DeviceMesh
 from torch.distributed.checkpoint.format_utils import dcp_to_torch_save
@@ -323,3 +324,20 @@ class CheckpointManager:
         dist.barrier()
 
         return cls(args)
+
+
+def main(
+    command: str,
+    model_checkpoint_dir: str,
+):
+    if command == "consolidate":
+        print(
+            f"Consolidating {model_checkpoint_dir}. Output will be in the {CONSOLIDATE_FOLDER} folder."
+        )
+        consolidate_checkpoints(fsspec.filesystem("file"), model_checkpoint_dir)
+    else:
+        raise ValueError("Invalid command")
+
+
+if __name__ == "__main__":
+    typer.run(main)