Add model describe subcommand

llama_toolchain/cli/model/describe.py

@@ -0,0 +1,66 @@
+# 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
+import json
+
+from llama_models.llama3_1.api.sku_list import llama3_1_model_list
+
+from termcolor import colored
+
+from llama_toolchain.cli.subcommand import Subcommand
+from llama_toolchain.cli.table import print_table
+
+
+class ModelDescribe(Subcommand):
+    """Show details about a model"""
+
+    def __init__(self, subparsers: argparse._SubParsersAction):
+        super().__init__()
+        self.parser = subparsers.add_parser(
+            "describe",
+            prog="llama model describe",
+            description="Show details about a llama model",
+            formatter_class=argparse.RawTextHelpFormatter,
+        )
+        self._add_arguments()
+        self.parser.set_defaults(func=self._run_model_describe_cmd)
+
+    def _add_arguments(self):
+        self.parser.add_argument(
+            "-m",
+            "--model-id",
+            type=str,
+        )
+
+    def _run_model_describe_cmd(self, args: argparse.Namespace) -> None:
+        models = llama3_1_model_list()
+        by_id = {model.sku.value: model for model in models}
+
+        if args.model_id not in by_id:
+            print(
+                f"Model {args.model_id} not found; try 'llama model list' for a list of available models."
+            )
+            return
+
+        model = by_id[args.model_id]
+
+        rows = [
+            (
+                colored("Model", "white", attrs=["bold"]),
+                colored(model.sku.value, "white", attrs=["bold"]),
+            ),
+            ("HuggingFace ID", model.huggingface_id or "<Not Available>"),
+            ("Description", model.description_markdown),
+            ("Context Length", f"{model.max_seq_length // 1024}K tokens"),
+            ("Weights format", model.quantization_format.value),
+            ("Model params.json", json.dumps(model.model_args, indent=4)),
+        ]
+
+        print_table(
+            rows,
+            separate_rows=True,
+        )

llama_toolchain/cli/model/model.py

@@ -7,9 +7,10 @@
 import argparse
 import textwrap
 
+from llama_toolchain.cli.model.describe import ModelDescribe
 from llama_toolchain.cli.model.list import ModelList
-
 from llama_toolchain.cli.model.template import ModelTemplate
+
 from llama_toolchain.cli.subcommand import Subcommand
 
 
@@ -35,3 +36,4 @@ class ModelParser(Subcommand):
         # Add sub-commandsa
         ModelTemplate.create(subparsers)
         ModelList.create(subparsers)
+        ModelDescribe.create(subparsers)

llama_toolchain/cli/table.py

@@ -22,7 +22,6 @@ def format_row(row, col_widths):
             if line.strip() == "":
                 lines.append("")
             else:
-                line = line.strip()
                 lines.extend(
                     textwrap.wrap(
                         line, width, break_long_words=False, replace_whitespace=False
@@ -45,14 +44,18 @@ def format_row(row, col_widths):
 
 
 def print_table(rows, headers=None, separate_rows: bool = False):
+    def itemlen(item):
+        return len(strip_ansi_colors(item))
+
     rows = [[x or "" for x in row] for row in rows]
     if not headers:
-        col_widths = [
+        col_widths = [max(itemlen(item) for item in col) for col in zip(*rows)]
-            max(len(strip_ansi_colors(item)) for item in col) for col in zip(*rows)
-        ]
     else:
         col_widths = [
-            max(len(header), max(len(strip_ansi_colors(item)) for item in col))
+            max(
+                itemlen(header),
+                max(itemlen(item) for item in col),
+            )
             for header, col in zip(headers, zip(*rows))
         ]
     col_widths = [min(w, 80) for w in col_widths]