Fixes to the llama stack configure script + inference adapters

llama_toolchain/cli/stack/list_providers.py

@@ -0,0 +1,60 @@
+# 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_toolchain.cli.subcommand import Subcommand
+
+
+class StackListProviders(Subcommand):
+    def __init__(self, subparsers: argparse._SubParsersAction):
+        super().__init__()
+        self.parser = subparsers.add_parser(
+            "list-providers",
+            prog="llama stack list-providers",
+            description="Show available Llama Stack Providers for an API",
+            formatter_class=argparse.RawTextHelpFormatter,
+        )
+        self._add_arguments()
+        self.parser.set_defaults(func=self._run_providers_list_cmd)
+
+    def _add_arguments(self):
+        from llama_toolchain.core.distribution import stack_apis
+
+        api_values = [a.value for a in stack_apis()]
+        self.parser.add_argument(
+            "api",
+            type=str,
+            choices=api_values,
+            help="API to list providers for (one of: {})".format(api_values),
+        )
+
+    def _run_providers_list_cmd(self, args: argparse.Namespace) -> None:
+        from llama_toolchain.cli.table import print_table
+        from llama_toolchain.core.distribution import Api, api_providers
+
+        all_providers = api_providers()
+        providers_for_api = all_providers[Api(args.api)]
+
+        # eventually, this should query a registry at llama.meta.com/llamastack/distributions
+        headers = [
+            "Provider ID",
+            "PIP Package Dependencies",
+        ]
+
+        rows = []
+        for spec in providers_for_api.values():
+            rows.append(
+                [
+                    spec.provider_id,
+                    ",".join(spec.pip_packages),
+                ]
+            )
+        print_table(
+            rows,
+            headers,
+            separate_rows=True,
+        )