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"""Declarative worker registry and configuration schema (#798, epic #797).
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The registry is the single source of truth for the scheduled multi-LLM worker
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fleet. It is a versioned JSON document holding two *separate* entity kinds:
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* **Providers** — the LLM runtimes a worker can be built on (Claude, Grok,
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Codex, AGY, Kimi K). A provider describes the runtime itself: vendor,
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executable name, models it can serve, and whether it is available on this
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machine. Providers exist whether or not any worker uses them.
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* **Workers** — a configured *instance*: one provider, one model, one project,
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one role, one MCP namespace/profile, one workflow, one schedule. Several
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workers may share a provider; a worker naming an undeclared provider is
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refused.
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Keeping them separate is what lets #799 list all five providers even when a
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provider currently has no configured worker, and it stops provider facts from
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being copied into (and drifting across) every worker record.
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Scope boundary. This module owns the data model, its validation, and its
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persistence. It does **not** schedule anything, launch anything, probe provider
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executables, or serve HTTP. Loading a registry never touches a process; the
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live fields a dashboard wants (PID, elapsed time, next run) are derived
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elsewhere (#799, #801, #803, #804) from these declarations.
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Safety invariants:
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* No credential may be stored (:mod:`webui.registry_safety`), so the registry
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stays safe to render and to hand to a browser layer.
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* Validation fails closed. Unknown fields are refused rather than ignored, so a
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typo cannot silently disable a timeout or a role binding.
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* Writes are atomic and every superseded document is retained as a numbered
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revision, so a bad edit is recoverable by rollback rather than hand-repair.
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"""
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from __future__ import annotations
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import json
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import os
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import re
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import tempfile
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from dataclasses import dataclass
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from datetime import datetime, timezone
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from pathlib import Path
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from typing import Any
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from webui.registry_safety import reject_credential_keys
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SCHEMA_VERSION = 1
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#: Roles a worker may hold. These mirror the sanctioned MCP role kinds; a
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#: worker may not invent one, because the role selects the namespace/profile
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#: whose capability gates constrain it.
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ALLOWED_ROLES = ("author", "reviewer", "merger", "reconciler", "cleanup")
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#: Scheduler backends the registry can describe. ``manual`` means the worker is
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#: only ever started on request and has no recurring trigger.
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ALLOWED_SCHEDULER_KINDS = ("launchd", "manual")
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#: Schedule kinds. Next-run computation belongs to #803; this module only
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#: guarantees the declaration is well formed.
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ALLOWED_SCHEDULE_KINDS = ("interval", "cron", "manual")
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_REQUIRED_PROVIDER_FIELDS = ("id", "display_name", "vendor", "executable", "available")
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_OPTIONAL_PROVIDER_FIELDS = ("models", "notes")
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_REQUIRED_WORKER_FIELDS = (
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"id",
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"display_name",
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"provider",
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"model",
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"project",
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"role",
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"namespace",
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"profile",
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"workflow",
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"schedule",
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"timeout_seconds",
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"enabled",
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"scheduler",
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)
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_OPTIONAL_WORKER_FIELDS = ("notes",)
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_ID_RE = re.compile(r"^[a-z0-9][a-z0-9._-]*$")
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#: Guards against an operator writing a timeout that would let a worker hold a
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#: lease effectively forever. 24h is far above any sanctioned cycle.
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_MAX_TIMEOUT_SECONDS = 86_400
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#: How many superseded revisions to retain beside the live file.
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_HISTORY_LIMIT = 20
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_TOP_LEVEL_FIELDS = frozenset({"version", "revision", "updated_at", "providers", "workers"})
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class RegistryValidationError(ValueError):
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"""Raised when a registry document violates the schema."""
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@dataclass(frozen=True)
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class ProviderRecord:
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id: str
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display_name: str
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vendor: str
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executable: str
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available: bool
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models: tuple[str, ...]
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notes: str
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@dataclass(frozen=True)
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class ScheduleSpec:
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kind: str
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#: Set for ``interval`` schedules.
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seconds: int | None
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#: Set for ``cron`` schedules — a five-field crontab expression.
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expression: str | None
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@dataclass(frozen=True)
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class SchedulerSpec:
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kind: str
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#: LaunchAgent label; required for ``launchd``, absent for ``manual``.
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label: str | None
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@dataclass(frozen=True)
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class WorkerRecord:
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id: str
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display_name: str
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provider: str
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model: str
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project: str
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role: str
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namespace: str
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profile: str
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workflow: str
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schedule: ScheduleSpec
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timeout_seconds: int
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enabled: bool
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scheduler: SchedulerSpec
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notes: str
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@dataclass(frozen=True)
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class WorkerRegistry:
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version: int
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revision: int
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updated_at: str
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providers: tuple[ProviderRecord, ...]
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workers: tuple[WorkerRecord, ...]
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source_path: Path
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# ── paths ────────────────────────────────────────────────────────────────────
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def default_registry_path() -> Path:
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"""Location of the packaged worker registry, overridable for tests/deploys."""
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override = os.environ.get("WEBUI_WORKER_REGISTRY", "").strip()
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if override:
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return Path(override).expanduser().resolve()
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return (Path(__file__).resolve().parent / "data" / "workers.registry.json").resolve()
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def history_dir(path: Path | None = None) -> Path:
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"""Directory holding superseded revisions of *path*."""
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source = (path or default_registry_path()).resolve()
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return source.parent / f"{source.name}.history"
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# ── field helpers ────────────────────────────────────────────────────────────
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def _require_exact_fields(
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raw: Any,
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*,
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required: tuple[str, ...],
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optional: tuple[str, ...],
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subject: str,
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) -> dict[str, Any]:
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if not isinstance(raw, dict):
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raise RegistryValidationError(f"{subject} must be an object")
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missing = [field for field in required if field not in raw]
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if missing:
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raise RegistryValidationError(
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f"{subject} missing required fields: {', '.join(sorted(missing))}"
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)
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unknown = sorted(set(raw) - set(required) - set(optional))
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if unknown:
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# Fail closed: silently dropping an unrecognized key is how a typo'd
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# "timeout_second" ends up meaning "no timeout".
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raise RegistryValidationError(f"{subject} has unknown fields: {', '.join(unknown)}")
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return raw
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def _require_identifier(value: Any, *, subject: str) -> str:
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text = str(value).strip()
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if not _ID_RE.match(text):
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raise RegistryValidationError(
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f"{subject} must be lowercase alphanumeric with '.', '_', or '-' (got {value!r})"
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)
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return text
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def _require_text(value: Any, *, subject: str) -> str:
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if not isinstance(value, str):
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raise RegistryValidationError(f"{subject} must be a string (got {value!r})")
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text = value.strip()
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if not text:
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raise RegistryValidationError(f"{subject} must be a non-empty string")
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return text
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def _require_bool(value: Any, *, subject: str) -> bool:
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if not isinstance(value, bool):
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raise RegistryValidationError(f"{subject} must be a boolean (got {value!r})")
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return value
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def _require_positive_int(value: Any, *, subject: str, maximum: int | None = None) -> int:
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if isinstance(value, bool) or not isinstance(value, int):
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raise RegistryValidationError(f"{subject} must be an integer (got {value!r})")
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if value <= 0:
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raise RegistryValidationError(f"{subject} must be greater than zero (got {value})")
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if maximum is not None and value > maximum:
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raise RegistryValidationError(f"{subject} must not exceed {maximum} (got {value})")
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return value
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# ── parsing ──────────────────────────────────────────────────────────────────
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def _parse_provider(raw: Any) -> ProviderRecord:
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data = _require_exact_fields(
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raw,
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required=_REQUIRED_PROVIDER_FIELDS,
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optional=_OPTIONAL_PROVIDER_FIELDS,
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subject="provider",
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)
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provider_id = _require_identifier(data["id"], subject="provider.id")
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models_raw = data.get("models") or []
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if not isinstance(models_raw, list):
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raise RegistryValidationError(f"provider[{provider_id}].models must be an array")
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models = tuple(
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_require_text(item, subject=f"provider[{provider_id}].models[]") for item in models_raw
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)
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return ProviderRecord(
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id=provider_id,
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display_name=_require_text(
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data["display_name"], subject=f"provider[{provider_id}].display_name"
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),
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vendor=_require_text(data["vendor"], subject=f"provider[{provider_id}].vendor"),
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executable=_require_text(data["executable"], subject=f"provider[{provider_id}].executable"),
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available=_require_bool(data["available"], subject=f"provider[{provider_id}].available"),
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models=models,
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notes=str(data.get("notes") or "").strip(),
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)
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def _parse_schedule(raw: Any, *, subject: str) -> ScheduleSpec:
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if not isinstance(raw, dict):
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raise RegistryValidationError(f"{subject} must be an object")
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kind = _require_text(raw.get("kind"), subject=f"{subject}.kind")
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if kind not in ALLOWED_SCHEDULE_KINDS:
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raise RegistryValidationError(
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f"{subject}.kind must be one of {', '.join(ALLOWED_SCHEDULE_KINDS)} (got {kind!r})"
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)
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seconds: int | None = None
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expression: str | None = None
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if kind == "interval":
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if "seconds" not in raw:
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raise RegistryValidationError(f"{subject}.seconds is required for interval schedules")
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seconds = _require_positive_int(raw["seconds"], subject=f"{subject}.seconds")
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elif kind == "cron":
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if "expression" not in raw:
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raise RegistryValidationError(f"{subject}.expression is required for cron schedules")
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expression = _require_text(raw["expression"], subject=f"{subject}.expression")
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if len(expression.split()) != 5:
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raise RegistryValidationError(
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f"{subject}.expression must have five crontab fields (got {expression!r})"
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)
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allowed = {"kind"}
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if kind == "interval":
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allowed.add("seconds")
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elif kind == "cron":
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allowed.add("expression")
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unknown = sorted(set(raw) - allowed)
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if unknown:
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raise RegistryValidationError(
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f"{subject} has fields not valid for kind {kind!r}: {', '.join(unknown)}"
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)
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return ScheduleSpec(kind=kind, seconds=seconds, expression=expression)
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def _parse_scheduler(raw: Any, *, subject: str) -> SchedulerSpec:
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if not isinstance(raw, dict):
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raise RegistryValidationError(f"{subject} must be an object")
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kind = _require_text(raw.get("kind"), subject=f"{subject}.kind")
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if kind not in ALLOWED_SCHEDULER_KINDS:
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raise RegistryValidationError(
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f"{subject}.kind must be one of {', '.join(ALLOWED_SCHEDULER_KINDS)} (got {kind!r})"
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)
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label: str | None = None
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if kind == "launchd":
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if "label" not in raw:
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raise RegistryValidationError(f"{subject}.label is required for launchd schedulers")
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label = _require_text(raw["label"], subject=f"{subject}.label")
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allowed = {"kind"}
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if kind == "launchd":
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allowed.add("label")
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unknown = sorted(set(raw) - allowed)
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if unknown:
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raise RegistryValidationError(
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f"{subject} has fields not valid for kind {kind!r}: {', '.join(unknown)}"
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)
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return SchedulerSpec(kind=kind, label=label)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _parse_worker(raw: Any) -> WorkerRecord:
|
|
|
|
|
data = _require_exact_fields(
|
|
|
|
|
raw,
|
|
|
|
|
required=_REQUIRED_WORKER_FIELDS,
|
|
|
|
|
optional=_OPTIONAL_WORKER_FIELDS,
|
|
|
|
|
subject="worker",
|
|
|
|
|
)
|
|
|
|
|
worker_id = _require_identifier(data["id"], subject="worker.id")
|
|
|
|
|
|
|
|
|
|
role = _require_text(data["role"], subject=f"worker[{worker_id}].role")
|
|
|
|
|
if role not in ALLOWED_ROLES:
|
|
|
|
|
raise RegistryValidationError(
|
|
|
|
|
f"worker[{worker_id}].role must be one of {', '.join(ALLOWED_ROLES)} (got {role!r})"
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
return WorkerRecord(
|
|
|
|
|
id=worker_id,
|
|
|
|
|
display_name=_require_text(
|
|
|
|
|
data["display_name"], subject=f"worker[{worker_id}].display_name"
|
|
|
|
|
),
|
|
|
|
|
provider=_require_identifier(data["provider"], subject=f"worker[{worker_id}].provider"),
|
|
|
|
|
model=_require_text(data["model"], subject=f"worker[{worker_id}].model"),
|
|
|
|
|
project=_require_text(data["project"], subject=f"worker[{worker_id}].project"),
|
|
|
|
|
role=role,
|
|
|
|
|
namespace=_require_text(data["namespace"], subject=f"worker[{worker_id}].namespace"),
|
|
|
|
|
profile=_require_text(data["profile"], subject=f"worker[{worker_id}].profile"),
|
|
|
|
|
workflow=_require_text(data["workflow"], subject=f"worker[{worker_id}].workflow"),
|
|
|
|
|
schedule=_parse_schedule(data["schedule"], subject=f"worker[{worker_id}].schedule"),
|
|
|
|
|
timeout_seconds=_require_positive_int(
|
|
|
|
|
data["timeout_seconds"],
|
|
|
|
|
subject=f"worker[{worker_id}].timeout_seconds",
|
|
|
|
|
maximum=_MAX_TIMEOUT_SECONDS,
|
|
|
|
|
),
|
|
|
|
|
enabled=_require_bool(data["enabled"], subject=f"worker[{worker_id}].enabled"),
|
|
|
|
|
scheduler=_parse_scheduler(data["scheduler"], subject=f"worker[{worker_id}].scheduler"),
|
|
|
|
|
notes=str(data.get("notes") or "").strip(),
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _require_unique(values: list[str], *, subject: str) -> None:
|
|
|
|
|
seen: set[str] = set()
|
|
|
|
|
for value in values:
|
|
|
|
|
if value in seen:
|
|
|
|
|
raise RegistryValidationError(f"duplicate {subject}: {value}")
|
|
|
|
|
seen.add(value)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def validate_payload(payload: Any, *, source_path: Path) -> WorkerRegistry:
|
|
|
|
|
"""Validate a decoded registry document and return the typed registry.
|
|
|
|
|
|
|
|
|
|
Raises :class:`RegistryValidationError` on any violation; never partially
|
|
|
|
|
accepts a document.
|
|
|
|
|
"""
|
|
|
|
|
if not isinstance(payload, dict):
|
|
|
|
|
raise RegistryValidationError("registry root must be an object")
|
|
|
|
|
|
|
|
|
|
version = payload.get("version")
|
|
|
|
|
if version != SCHEMA_VERSION:
|
|
|
|
|
raise RegistryValidationError(f"unsupported registry version: {version!r}")
|
|
|
|
|
|
|
|
|
|
reject_credential_keys(payload, subject="worker registry")
|
|
|
|
|
|
|
|
|
|
unknown = sorted(set(payload) - _TOP_LEVEL_FIELDS)
|
|
|
|
|
if unknown:
|
|
|
|
|
raise RegistryValidationError(f"registry has unknown fields: {', '.join(unknown)}")
|
|
|
|
|
|
|
|
|
|
revision = _require_positive_int(payload.get("revision"), subject="revision")
|
|
|
|
|
updated_at = _require_text(payload.get("updated_at"), subject="updated_at")
|
|
|
|
|
|
|
|
|
|
providers_raw = payload.get("providers")
|
|
|
|
|
if not isinstance(providers_raw, list) or not providers_raw:
|
|
|
|
|
raise RegistryValidationError("providers must be a non-empty array")
|
|
|
|
|
providers = tuple(_parse_provider(item) for item in providers_raw)
|
|
|
|
|
_require_unique([provider.id for provider in providers], subject="provider id")
|
|
|
|
|
|
|
|
|
|
workers_raw = payload.get("workers")
|
|
|
|
|
if not isinstance(workers_raw, list):
|
|
|
|
|
raise RegistryValidationError("workers must be an array")
|
|
|
|
|
workers = tuple(_parse_worker(item) for item in workers_raw)
|
|
|
|
|
_require_unique([worker.id for worker in workers], subject="worker id")
|
|
|
|
|
|
|
|
|
|
# Referential integrity: a worker naming an undeclared provider would look
|
|
|
|
|
# configured while being unrunnable, which is exactly the ambiguous
|
|
|
|
|
# ownership the epic requires to fail closed.
|
|
|
|
|
known_providers = {provider.id for provider in providers}
|
|
|
|
|
for worker in workers:
|
|
|
|
|
if worker.provider not in known_providers:
|
|
|
|
|
raise RegistryValidationError(
|
|
|
|
|
f"worker[{worker.id}].provider references unknown provider {worker.provider!r}"
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
# A LaunchAgent label identifies a job to launchd; two workers sharing one
|
|
|
|
|
# would silently overwrite each other's agent.
|
|
|
|
|
_require_unique(
|
|
|
|
|
[worker.scheduler.label for worker in workers if worker.scheduler.label],
|
|
|
|
|
subject="scheduler label",
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
return WorkerRegistry(
|
|
|
|
|
version=version,
|
|
|
|
|
revision=revision,
|
|
|
|
|
updated_at=updated_at,
|
|
|
|
|
providers=providers,
|
|
|
|
|
workers=workers,
|
|
|
|
|
source_path=source_path,
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def load_registry(path: Path | None = None) -> WorkerRegistry:
|
|
|
|
|
"""Load and validate the worker registry from disk."""
|
|
|
|
|
source = (path or default_registry_path()).resolve()
|
|
|
|
|
payload = json.loads(source.read_text(encoding="utf-8"))
|
|
|
|
|
return validate_payload(payload, source_path=source)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# ── serialization ────────────────────────────────────────────────────────────
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def provider_to_dict(provider: ProviderRecord) -> dict[str, Any]:
|
|
|
|
|
return {
|
|
|
|
|
"id": provider.id,
|
|
|
|
|
"display_name": provider.display_name,
|
|
|
|
|
"vendor": provider.vendor,
|
|
|
|
|
"executable": provider.executable,
|
|
|
|
|
"available": provider.available,
|
|
|
|
|
"models": list(provider.models),
|
|
|
|
|
"notes": provider.notes,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _schedule_to_dict(schedule: ScheduleSpec) -> dict[str, Any]:
|
|
|
|
|
payload: dict[str, Any] = {"kind": schedule.kind}
|
|
|
|
|
if schedule.kind == "interval":
|
|
|
|
|
payload["seconds"] = schedule.seconds
|
|
|
|
|
elif schedule.kind == "cron":
|
|
|
|
|
payload["expression"] = schedule.expression
|
|
|
|
|
return payload
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _scheduler_to_dict(scheduler: SchedulerSpec) -> dict[str, Any]:
|
|
|
|
|
payload: dict[str, Any] = {"kind": scheduler.kind}
|
|
|
|
|
if scheduler.kind == "launchd":
|
|
|
|
|
payload["label"] = scheduler.label
|
|
|
|
|
return payload
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def worker_to_dict(worker: WorkerRecord) -> dict[str, Any]:
|
|
|
|
|
return {
|
|
|
|
|
"id": worker.id,
|
|
|
|
|
"display_name": worker.display_name,
|
|
|
|
|
"provider": worker.provider,
|
|
|
|
|
"model": worker.model,
|
|
|
|
|
"project": worker.project,
|
|
|
|
|
"role": worker.role,
|
|
|
|
|
"namespace": worker.namespace,
|
|
|
|
|
"profile": worker.profile,
|
|
|
|
|
"workflow": worker.workflow,
|
|
|
|
|
"schedule": _schedule_to_dict(worker.schedule),
|
|
|
|
|
"timeout_seconds": worker.timeout_seconds,
|
|
|
|
|
"enabled": worker.enabled,
|
|
|
|
|
"scheduler": _scheduler_to_dict(worker.scheduler),
|
|
|
|
|
"notes": worker.notes,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def registry_to_document(registry: WorkerRegistry) -> dict[str, Any]:
|
|
|
|
|
"""Serialize to the on-disk document shape (no local paths embedded)."""
|
|
|
|
|
return {
|
|
|
|
|
"version": registry.version,
|
|
|
|
|
"revision": registry.revision,
|
|
|
|
|
"updated_at": registry.updated_at,
|
|
|
|
|
"providers": [provider_to_dict(provider) for provider in registry.providers],
|
|
|
|
|
"workers": [worker_to_dict(worker) for worker in registry.workers],
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def registry_to_dict(registry: WorkerRegistry) -> dict[str, Any]:
|
|
|
|
|
"""Serialize for JSON API responses (adds the resolved source path)."""
|
|
|
|
|
document = registry_to_document(registry)
|
|
|
|
|
document["source_path"] = str(registry.source_path)
|
|
|
|
|
return document
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def find_worker(registry: WorkerRegistry, worker_id: str) -> WorkerRecord | None:
|
|
|
|
|
for worker in registry.workers:
|
|
|
|
|
if worker.id == worker_id:
|
|
|
|
|
return worker
|
|
|
|
|
return None
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def find_provider(registry: WorkerRegistry, provider_id: str) -> ProviderRecord | None:
|
|
|
|
|
for provider in registry.providers:
|
|
|
|
|
if provider.id == provider_id:
|
|
|
|
|
return provider
|
|
|
|
|
return None
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def workers_for_provider(registry: WorkerRegistry, provider_id: str) -> tuple[WorkerRecord, ...]:
|
|
|
|
|
return tuple(worker for worker in registry.workers if worker.provider == provider_id)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# ── persistence ──────────────────────────────────────────────────────────────
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _utc_now() -> str:
|
|
|
|
|
return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _atomic_write(path: Path, payload: str) -> None:
|
|
|
|
|
"""Write *payload* to *path* atomically: temp file in the same dir, fsync, replace."""
|
|
|
|
|
parent = path.parent
|
|
|
|
|
parent.mkdir(parents=True, exist_ok=True)
|
|
|
|
|
fd, temp_path = tempfile.mkstemp(prefix=f".{path.name}-", suffix=".tmp", dir=parent)
|
|
|
|
|
try:
|
|
|
|
|
with os.fdopen(fd, "w", encoding="utf-8") as handle:
|
|
|
|
|
handle.write(payload)
|
|
|
|
|
handle.flush()
|
|
|
|
|
os.fsync(handle.fileno())
|
|
|
|
|
os.replace(temp_path, path)
|
|
|
|
|
finally:
|
|
|
|
|
if os.path.exists(temp_path):
|
|
|
|
|
try:
|
|
|
|
|
os.remove(temp_path)
|
|
|
|
|
except OSError:
|
|
|
|
|
pass
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _revision_path(directory: Path, revision: int) -> Path:
|
|
|
|
|
return directory / f"rev-{revision:06d}.json"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _prune_history(path: Path) -> None:
|
|
|
|
|
directory = history_dir(path)
|
|
|
|
|
revisions = list_revisions(path)
|
|
|
|
|
excess = len(revisions) - _HISTORY_LIMIT
|
|
|
|
|
for revision in revisions[: max(0, excess)]:
|
|
|
|
|
_revision_path(directory, revision).unlink(missing_ok=True)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def _archive_current(path: Path) -> int | None:
|
|
|
|
|
"""Copy the live document into the history dir under its own revision number."""
|
|
|
|
|
if not path.exists():
|
|
|
|
|
return None
|
|
|
|
|
try:
|
|
|
|
|
existing = json.loads(path.read_text(encoding="utf-8"))
|
|
|
|
|
revision = int(existing.get("revision", 0))
|
|
|
|
|
except (json.JSONDecodeError, TypeError, ValueError, AttributeError):
|
|
|
|
|
# An unreadable live file has no trustworthy revision number to file it
|
|
|
|
|
# under, so it cannot join the history chain.
|
|
|
|
|
return None
|
|
|
|
|
if revision <= 0:
|
|
|
|
|
return None
|
|
|
|
|
_atomic_write(
|
|
|
|
|
_revision_path(history_dir(path), revision),
|
|
|
|
|
json.dumps(existing, indent=2, sort_keys=True) + "\n",
|
|
|
|
|
)
|
|
|
|
|
_prune_history(path)
|
|
|
|
|
return revision
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def list_revisions(path: Path | None = None) -> tuple[int, ...]:
|
|
|
|
|
"""Revision numbers retained in history for *path*, oldest first."""
|
|
|
|
|
directory = history_dir(path)
|
|
|
|
|
if not directory.is_dir():
|
|
|
|
|
return ()
|
|
|
|
|
revisions: list[int] = []
|
|
|
|
|
for entry in directory.glob("rev-*.json"):
|
|
|
|
|
try:
|
|
|
|
|
revisions.append(int(entry.stem.split("-", 1)[1]))
|
|
|
|
|
except (IndexError, ValueError):
|
|
|
|
|
continue
|
|
|
|
|
return tuple(sorted(revisions))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def save_registry(
|
|
|
|
|
registry: WorkerRegistry,
|
|
|
|
|
path: Path | None = None,
|
|
|
|
|
*,
|
|
|
|
|
updated_at: str | None = None,
|
|
|
|
|
) -> WorkerRegistry:
|
|
|
|
|
"""Validate, archive the superseded revision, then atomically persist a new one.
|
|
|
|
|
|
|
|
|
|
The stored revision is always the previous revision plus one, so a reader
|
|
|
|
|
can tell two documents apart even when their content is otherwise equal.
|
|
|
|
|
Returns the registry exactly as persisted.
|
|
|
|
|
"""
|
|
|
|
|
target = (path or registry.source_path or default_registry_path()).resolve()
|
|
|
|
|
|
|
|
|
|
document = registry_to_document(registry)
|
|
|
|
|
# Re-validate before writing: a registry assembled in memory has not
|
|
|
|
|
# necessarily been through the loader.
|
|
|
|
|
validate_payload(document, source_path=target)
|
|
|
|
|
|
|
|
|
|
archived = _archive_current(target)
|
|
|
|
|
document["revision"] = (archived + 1) if archived is not None else registry.revision
|
|
|
|
|
document["updated_at"] = updated_at or _utc_now()
|
|
|
|
|
|
|
|
|
|
persisted = validate_payload(document, source_path=target)
|
|
|
|
|
_atomic_write(target, json.dumps(document, indent=2, sort_keys=True) + "\n")
|
|
|
|
|
return persisted
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def rollback_to_revision(revision: int, path: Path | None = None) -> WorkerRegistry:
|
|
|
|
|
"""Restore a retained *revision* as a new head revision.
|
|
|
|
|
|
|
|
|
|
History is append-only: rolling back does not delete the revisions in
|
|
|
|
|
between, it republishes the chosen one under the next revision number, so a
|
|
|
|
|
rollback is itself reversible.
|
|
|
|
|
"""
|
|
|
|
|
target = (path or default_registry_path()).resolve()
|
|
|
|
|
snapshot_path = _revision_path(history_dir(target), revision)
|
|
|
|
|
if not snapshot_path.exists():
|
|
|
|
|
available = ", ".join(str(item) for item in list_revisions(target)) or "(none)"
|
|
|
|
|
raise RegistryValidationError(
|
|
|
|
|
f"revision {revision} is not retained for {target.name}; available: {available}"
|
|
|
|
|
)
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|
|
|
|
|
|
|
|
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payload = json.loads(snapshot_path.read_text(encoding="utf-8"))
|
|
|
|
|
restored = validate_payload(payload, source_path=target)
|
|
|
|
|
return save_registry(restored, target)
|