llama stack start -> llama stack run

llama_toolchain/cli/stack/run.py

@@ -0,0 +1,106 @@
+# 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 pathlib import Path
+
+import pkg_resources
+import yaml
+
+from llama_toolchain.cli.subcommand import Subcommand
+from llama_toolchain.core.datatypes import *  # noqa: F403
+from llama_toolchain.common.config_dirs import BUILDS_BASE_DIR
+
+
+class StackRun(Subcommand):
+    def __init__(self, subparsers: argparse._SubParsersAction):
+        super().__init__()
+        self.parser = subparsers.add_parser(
+            "run",
+            prog="llama stack run",
+            description="""start the server for a Llama Stack Distribution. You should have already built (or downloaded) and configured the distribution.""",
+            formatter_class=argparse.RawTextHelpFormatter,
+        )
+        self._add_arguments()
+        self.parser.set_defaults(func=self._run_stack_run_cmd)
+
+    def _add_arguments(self):
+        from llama_toolchain.core.package import BuildType
+
+        self.parser.add_argument(
+            "distribution",
+            type=str,
+            help="Distribution whose build you want to start",
+        )
+        self.parser.add_argument(
+            "--name",
+            type=str,
+            help="Name of the build you want to start",
+            required=True,
+        )
+        self.parser.add_argument(
+            "--type",
+            type=str,
+            default="conda_env",
+            choices=[v.value for v in BuildType],
+        )
+        self.parser.add_argument(
+            "--port",
+            type=int,
+            help="Port to run the server on. Defaults to 5000",
+            default=5000,
+        )
+        self.parser.add_argument(
+            "--disable-ipv6",
+            action="store_true",
+            help="Disable IPv6 support",
+            default=False,
+        )
+
+    def _run_stack_run_cmd(self, args: argparse.Namespace) -> None:
+        from llama_toolchain.common.exec import run_with_pty
+        from llama_toolchain.core.package import BuildType
+
+        build_type = BuildType(args.type)
+        build_dir = BUILDS_BASE_DIR / args.distribution / build_type.descriptor()
+        path = build_dir / f"{args.name}.yaml"
+
+        config_file = Path(path)
+
+        if not config_file.exists():
+            self.parser.error(
+                f"File {str(config_file)} does not exist. Did you run `llama stack build`?"
+            )
+            return
+
+        with open(config_file, "r") as f:
+            config = PackageConfig(**yaml.safe_load(f))
+
+        if not config.distribution_id:
+            raise ValueError("Build config appears to be corrupt.")
+
+        if config.docker_image:
+            script = pkg_resources.resource_filename(
+                "llama_toolchain",
+                "core/start_container.sh",
+            )
+            run_args = [script, config.docker_image]
+        else:
+            script = pkg_resources.resource_filename(
+                "llama_toolchain",
+                "core/start_conda_env.sh",
+            )
+            run_args = [
+                script,
+                config.conda_env,
+            ]
+
+        run_args.extend([str(config_file), str(args.port)])
+        if args.disable_ipv6:
+            run_args.append("--disable-ipv6")
+
+        run_with_pty(run_args)