Add model list subcommand

llama_toolchain/cli/model/list.py

@@ -0,0 +1,62 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import argparse
+
+from llama_models.llama3_1.api.sku_list import llama3_1_model_list
+
+from llama_toolchain.cli.subcommand import Subcommand
+from llama_toolchain.cli.table import print_table
+
+
+class ModelList(Subcommand):
+    """List available llama models"""
+
+    def __init__(self, subparsers: argparse._SubParsersAction):
+        super().__init__()
+        self.parser = subparsers.add_parser(
+            "list",
+            prog="llama model list",
+            description="Show available llama models",
+            formatter_class=argparse.RawTextHelpFormatter,
+        )
+        self._add_arguments()
+        self.parser.set_defaults(func=self._run_model_list_cmd)
+
+    def _add_arguments(self):
+        self.parser.add_argument(
+            "-m",
+            "--model-family",
+            type=str,
+            default="llama3_1",
+            help="Model Family (llama3_1, llama3_X, etc.)",
+        )
+
+    def _run_model_list_cmd(self, args: argparse.Namespace) -> None:
+        models = llama3_1_model_list()
+        headers = [
+            "Model ID",
+            "HuggingFace ID",
+            "Context Length",
+            "Hardware Requirements",
+        ]
+
+        rows = []
+        for model in models:
+            req = model.hardware_requirements
+            rows.append(
+                [
+                    model.sku.value,
+                    model.huggingface_id,
+                    f"{model.max_seq_length // 1024}K",
+                    f"{req.gpu_count} GPU{'s' if req.gpu_count > 1 else ''}, each >= {req.memory_gb_per_gpu}GB VRAM",
+                ]
+            )
+        print_table(
+            rows,
+            headers,
+            separate_rows=True,
+        )