…h#1409)

Summary:

replaces abandoned D83683389 "base64 JSON snapshot + freeze" approach with a layered config model end-to-end, and wires `bootstrap` to pass real `Attrs` directly.

`hyperactor::config::global` now resolves via layers: `TestOverride` → `Runtime` → `Env` → `File` → `Default`. Reads (`global::get`, `get_cloned`) walk layers in that order; `global::attrs()` returns a complete, materialized snapshot (defaults included, meta-only keys omitted unless explicitly set). the layered store is `LAYERS`, seeded with an `Env` layer at startup. `global::set(Source, Attrs)` inserts/replaces a layer and re-sorts by priority; `reset_to_defaults()` clears all explicit layers. test overrides are implemented as a single `TestOverride` layer that is created on demand under `ConfigLock`, with env-var mirroring only in tests and restored on `drop`.

`Bootstrap` now carries `Option<Attrs>` in `Bootstrap::{Proc,Host}.config`. if present, the child installs it as the `Runtime` layer (`global::set(Source::Runtime, …)`), so the parent's effective config wins over `Env`/`File`/`Default` in the child. if absent, the child uses `Env`/`Default` as before. no base64, no freezing.

minor attrs API addition: `Attrs::get_value_by_name` (internal) to support merging.

tests cover layer precedence (`Env` over `File`; `Runtime` over `Env`/`File`; clearing `Runtime` reveals lower layers), snapshot materialization (defaults included, meta omitted), parent->child snapshot as `Runtime`, `TestOverride` behavior with env-var mirroring and restoration, and parity between `get` and `get_cloned`.

Reviewed By: mariusae

Differential Revision: D83778023

…h#1409)

Summary:

replaces abandoned D83683389 "base64 JSON snapshot + freeze" approach with a layered config model end-to-end, and wires `bootstrap` to pass real `Attrs` directly.

`hyperactor::config::global` now resolves via layers: `TestOverride` → `Runtime` → `Env` → `File` → `Default`. Reads (`global::get`, `get_cloned`) walk layers in that order; `global::attrs()` returns a complete, materialized snapshot (defaults included, meta-only keys omitted unless explicitly set). the layered store is `LAYERS`, seeded with an `Env` layer at startup. `global::set(Source, Attrs)` inserts/replaces a layer and re-sorts by priority; `reset_to_defaults()` clears all explicit layers. test overrides are implemented as a single `TestOverride` layer that is created on demand under `ConfigLock`, with env-var mirroring only in tests and restored on `drop`.

`Bootstrap` now carries `Option<Attrs>` in `Bootstrap::{Proc,Host}.config`. if present, the child installs it as the `Runtime` layer (`global::set(Source::Runtime, …)`), so the parent's effective config wins over `Env`/`File`/`Default` in the child. if absent, the child uses `Env`/`Default` as before. no base64, no freezing.

minor attrs API addition: `Attrs::get_value_by_name` (internal) to support merging.

tests cover layer precedence (`Env` over `File`; `Runtime` over `Env`/`File`; clearing `Runtime` reveals lower layers), snapshot materialization (defaults included, meta omitted), parent->child snapshot as `Runtime`, `TestOverride` behavior with env-var mirroring and restoration, and parity between `get` and `get_cloned`.

Reviewed By: mariusae

Differential Revision: D83778023

…1409)

Summary:
Pull Request resolved: meta-pytorch#1409

replaces abandoned D83683389 "base64 JSON snapshot + freeze" approach with a layered config model end-to-end, and wires `bootstrap` to pass real `Attrs` directly.

`hyperactor::config::global` now resolves via layers: `TestOverride` → `Runtime` → `Env` → `File` → `Default`. Reads (`global::get`, `get_cloned`) walk layers in that order; `global::attrs()` returns a complete, materialized snapshot (defaults included, meta-only keys omitted unless explicitly set). the layered store is `LAYERS`, seeded with an `Env` layer at startup. `global::set(Source, Attrs)` inserts/replaces a layer and re-sorts by priority; `reset_to_defaults()` clears all explicit layers. test overrides are implemented as a single `TestOverride` layer that is created on demand under `ConfigLock`, with env-var mirroring only in tests and restored on `drop`.

`Bootstrap` now carries `Option<Attrs>` in `Bootstrap::{Proc,Host}.config`. if present, the child installs it as the `Runtime` layer (`global::set(Source::Runtime, …)`), so the parent's effective config wins over `Env`/`File`/`Default` in the child. if absent, the child uses `Env`/`Default` as before. no base64, no freezing.

minor attrs API addition: `Attrs::get_value_by_name` (internal) to support merging.

tests cover layer precedence (`Env` over `File`; `Runtime` over `Env`/`File`; clearing `Runtime` reveals lower layers), snapshot materialization (defaults included, meta omitted), parent->child snapshot as `Runtime`, `TestOverride` behavior with env-var mirroring and restoration, and parity between `get` and `get_cloned`.

Reviewed By: mariusae

Differential Revision: D83778023

fbshipit-source-id: ad2ed27461e360e1c34ead03a5ab598a4d48f876