Introduce Llama stack distributions (#22)

* Add distribution CLI scaffolding

* More progress towards `llama distribution install`

* getting closer to a distro definition, distro install + configure works

* Distribution server now functioning

* read existing configuration, save enums properly

* Remove inference uvicorn server entrypoint and llama inference CLI command

* updated dependency and client model name

* Improved exception handling

* local imports for faster cli

* undo a typo, add a passthrough distribution

* implement full-passthrough in the server

* add safety adapters, configuration handling, server + clients

* cleanup, moving stuff to common, nuke utils

* Add a Path() wrapper at the earliest place

* fixes

* Bring agentic system api to toolchain

Add adapter dependencies and resolve adapters using a topological sort

* refactor to reduce size of `agentic_system`

* move straggler files and fix some important existing bugs

* ApiSurface -> Api

* refactor a method out

* Adapter -> Provider

* Make each inference provider into its own subdirectory

* installation fixes

* Rename Distribution -> DistributionSpec, simplify RemoteProviders

* dict key instead of attr

* update inference config to take model and not model_dir

* Fix passthrough streaming, send headers properly not part of body :facepalm

* update safety to use model sku ids and not model dirs

* Update cli_reference.md

* minor fixes

* add DistributionConfig, fix a bug in model download

* Make install + start scripts do proper configuration automatically

* Update CLI_reference

* Nuke fp8_requirements, fold fbgemm into common requirements

* Update README, add newline between API surface configurations

* Refactor download functionality out of the Command so can be reused

* Add `llama model download` alias for `llama download`

* Show message about checksum file so users can check themselves

* Simpler intro statements

* get ollama working

* Reduce a bunch of dependencies from toolchain

Some improvements to the distribution install script

* Avoid using `conda run` since it buffers everything

* update dependencies and rely on LLAMA_TOOLCHAIN_DIR for dev purposes

* add validation for configuration input

* resort imports

* make optional subclasses default to yes for configuration

* Remove additional_pip_packages; move deps to providers

* for inline make 8b model the default

* Add scripts to MANIFEST

* allow installing from test.pypi.org

* Fix #2 to help with testing packages

* Must install llama-models at that same version first

* fix PIP_ARGS

---------

Co-authored-by: Hardik Shah <hjshah@fb.com>
Co-authored-by: Hardik Shah <hjshah@meta.com>

llama_toolchain/cli/distribution/install.py

@@ -0,0 +1,111 @@
+# 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 os
+
+import pkg_resources
+import yaml
+
+from termcolor import cprint
+
+from llama_toolchain.cli.subcommand import Subcommand
+from llama_toolchain.common.config_dirs import DISTRIBS_BASE_DIR
+
+
+class DistributionInstall(Subcommand):
+    """Llama cli for configuring llama toolchain configs"""
+
+    def __init__(self, subparsers: argparse._SubParsersAction):
+        super().__init__()
+        self.parser = subparsers.add_parser(
+            "install",
+            prog="llama distribution install",
+            description="Install a llama stack distribution",
+            formatter_class=argparse.RawTextHelpFormatter,
+        )
+        self._add_arguments()
+        self.parser.set_defaults(func=self._run_distribution_install_cmd)
+
+    def _add_arguments(self):
+        from llama_toolchain.distribution.registry import available_distribution_specs
+
+        self.parser.add_argument(
+            "--spec",
+            type=str,
+            help="Distribution spec to install (try ollama-inline)",
+            required=True,
+            choices=[d.spec_id for d in available_distribution_specs()],
+        )
+        self.parser.add_argument(
+            "--name",
+            type=str,
+            help="What should the installation be called locally?",
+            required=True,
+        )
+        self.parser.add_argument(
+            "--conda-env",
+            type=str,
+            help="conda env in which this distribution will run (default = distribution name)",
+        )
+
+    def _run_distribution_install_cmd(self, args: argparse.Namespace) -> None:
+        from llama_toolchain.common.exec import run_with_pty
+        from llama_toolchain.distribution.datatypes import DistributionConfig
+        from llama_toolchain.distribution.distribution import distribution_dependencies
+        from llama_toolchain.distribution.registry import resolve_distribution_spec
+
+        os.makedirs(DISTRIBS_BASE_DIR, exist_ok=True)
+        script = pkg_resources.resource_filename(
+            "llama_toolchain",
+            "distribution/install_distribution.sh",
+        )
+
+        dist = resolve_distribution_spec(args.spec)
+        if dist is None:
+            self.parser.error(f"Could not find distribution {args.spec}")
+            return
+
+        distrib_dir = DISTRIBS_BASE_DIR / args.name
+        os.makedirs(distrib_dir, exist_ok=True)
+
+        deps = distribution_dependencies(dist)
+        if not args.conda_env:
+            print(f"Using {args.name} as the Conda environment for this distribution")
+
+        conda_env = args.conda_env or args.name
+
+        config_file = distrib_dir / "config.yaml"
+        if config_file.exists():
+            c = DistributionConfig(**yaml.safe_load(config_file.read_text()))
+            if c.spec != dist.spec_id:
+                self.parser.error(
+                    f"already installed distribution with `spec={c.spec}` does not match provided spec `{args.spec}`"
+                )
+                return
+            if c.conda_env != conda_env:
+                self.parser.error(
+                    f"already installed distribution has `conda_env={c.conda_env}` different from provided conda env `{conda_env}`"
+                )
+                return
+        else:
+            with open(config_file, "w") as f:
+                c = DistributionConfig(
+                    spec=dist.spec_id,
+                    name=args.name,
+                    conda_env=conda_env,
+                )
+                f.write(yaml.dump(c.dict(), sort_keys=False))
+
+        return_code = run_with_pty([script, conda_env, args.name, " ".join(deps)])
+
+        assert return_code == 0, cprint(
+            f"Failed to install distribution {dist.spec_id}", color="red"
+        )
+        cprint(
+            f"Distribution `{args.name}` (with spec {dist.spec_id}) has been installed successfully!",
+            color="green",
+        )