feat(harness): P1 — single registry-backed meta loader (rcust)
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One loader: runner/harness/meta.py::load(recipe) -> RecipeMeta (frozen dataclass, attribute access), backed by the declarative KEYS registry (14 final keys + 3 P2-deprecated). The ONLY exec() of tests/<recipe>/recipe_meta.py. Validation per the locked decision: unknown ALL-CAPS top-level name or type mismatch = MetaError (hard error at load); underscore-prefixed names recipe-private; callables only on hook-typed keys. Migrated all six legacy loaders (spec §4 L1–L6): - run_recipe_ci.py::_load_meta deleted; orchestrator loads once, passes meta down - tests/conftest.py::_recipe_meta deleted; meta fixture returns full RecipeMeta (R3) - lifecycle.py::_recipe_extra_env/_recipe_meta_flag deleted; deploy_app takes meta - deps.py::declared_deps deleted; callers read meta.DEPS - canonical.py::is_enrolled reads through meta.load() - screenshot.py now actually receives SCREENSHOT through the orchestrator path (R2 fix; proven by unit test through the real load path) Mumble private constants underscore-prefixed (_WELCOME_TEXT_MARKER/_MAX_USERS) + importers fixed. New tests/unit/test_meta.py (all-recipes-load-clean typo gate, MetaError cases, spec §2 baseline defaults, underscore exemption, doc sync). Docs §4 key table now GENERATED from the registry (scripts/gen-meta-docs.py); drift fails CI. Verified on cc-ci: cc-ci-run -m pytest tests/unit -q -> 175 passed; scripts/lint.sh -> PASS.
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runner/harness/meta.py
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runner/harness/meta.py
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"""Single recipe-meta loader + declarative key registry (recipe-custom restructure P1; spec
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docs/recipe-customization.md §8 R1).
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THE one place `tests/<recipe>/recipe_meta.py` is `exec()`d. Every consumer (orchestrator, pytest
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`meta` fixture, deploy env shaping, deps, warm-canonical enrollment, screenshot) reads the ONE
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loaded `RecipeMeta` object instead of re-exec'ing the file and cherry-picking keys — that drift
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(six divergent loaders, spec §4 L1–L6) is what made `SCREENSHOT` an unreachable knob (R2) and let
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key typos silently disable coverage (R6).
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Validation (locked decision, recipe-custom-restructure-full-plan.md):
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- unknown ALL-CAPS top-level name → MetaError (hard error, fails fast at load; the all-recipes
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unit test catches it at PR time). Underscore-prefixed names (`_FOO`) are recipe-private and
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exempt; lowercase names (helper functions/imports) are ignored.
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- type mismatch → MetaError. Callables are accepted ONLY for hook-typed keys.
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The KEYS registry is the single source of truth for the key set: it drives validation, the
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RecipeMeta dataclass fields, and the generated reference table in docs/recipe-customization.md §4
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(scripts/gen-meta-docs.py; a unit test asserts the committed table matches).
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"""
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from __future__ import annotations
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import copy
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import dataclasses
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import difflib
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import os
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from collections.abc import Callable
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ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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TESTS_DIR = os.path.join(ROOT, "tests")
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class MetaError(Exception):
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"""A recipe_meta.py failed registry validation (unknown key / type mismatch / callable on a
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data key). Hard error by design: a typo'd key must fail the run at load, not silently reduce
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coverage (spec §8 R6 — the worst failure mode for a CI harness)."""
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@dataclasses.dataclass(frozen=True)
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class Key:
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"""One registered recipe_meta key: name, type tag, default, one-line doc (rendered into the
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generated reference table), optional extra validator, and a deprecation marker (deprecated
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keys still load+validate but are scheduled for deletion)."""
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name: str
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type: str # "int"|"str"|"tuple[int]"|"bool"|"dict_or_hook"|"hook"|"list[str]"|"dict"
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default: object
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doc: str
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validate: Callable[[object], None] | None = None
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deprecated: bool = False
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KEYS: tuple[Key, ...] = (
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Key(
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"HEALTH_PATH",
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"str",
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"/",
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"Path probed for serving/health checks (deploy wait + generic `assert_serving`).",
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),
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Key("HEALTH_OK", "tuple[int]", (200, 301, 302), "Acceptable HTTP status codes for health."),
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Key("DEPLOY_TIMEOUT", "int", 600, "Max seconds to wait for swarm convergence per deploy."),
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Key("HTTP_TIMEOUT", "int", 300, "Max seconds to wait for HTTP health after convergence."),
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Key(
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"BACKUP_CAPABLE",
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"bool",
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None,
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"Override the backup-tier capability auto-detect (compose `backupbot.backup` labels). `False` forces N/A; `True` forces the tier on; unset = auto-detect.",
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),
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Key(
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"EXPECTED_NA",
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"dict",
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None,
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"Declare an N/A rung intentional: `{rung: reason}`. The cap stands either way; only the report wording changes.",
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),
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Key(
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"READY_PROBE",
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"hook",
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None,
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"Callable returning extra readiness probes, run after install AND after upgrade: HTTP `{host, path, ok}` or TCP `{tcp_host, tcp_port, stable}`.",
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),
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Key(
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"UPGRADE_BASE_VERSION",
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"str",
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None,
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"Exact published tag overriding the upgrade tier's base (default: `recipe_versions[-2]`).",
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),
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Key(
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"BACKUP_VERIFY",
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"hook",
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None,
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"Callable `-> bool` post-backup data-capture check; `False` re-runs the backup (truncated-dump race guard), retried up to 3 attempts.",
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),
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Key(
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"UPGRADE_EXTRA_ENV",
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"dict_or_hook",
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None,
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"Extra `.env` keys applied after the PR-head checkout, before the chaos redeploy (env that exists only at head).",
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),
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Key(
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"EXTRA_ENV",
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"dict_or_hook",
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{},
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"Extra `.env` keys applied at EVERY deploy (base install AND upgrade old-app). Callable form derives values from the per-run domain.",
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),
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Key(
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"DEPS",
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"list[str]",
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[],
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'Dep recipes deployed/provisioned alongside (e.g. `["keycloak"]`); creds land in `$CCCI_DEPS_FILE`.',
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),
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Key(
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"WARM_CANONICAL",
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"bool",
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False,
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"Enroll the recipe in the warm/canonical app system (docs/warm.md): green cold runs on LATEST advance the canonical snapshot.",
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),
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Key(
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"SCREENSHOT",
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"hook",
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None,
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"Callable driving Playwright to a safe, credential-free post-login view for the results-card screenshot (default: landing page).",
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),
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# ---- Deprecated (deleted in restructure P2; registered so P1 lands green before P2 removes
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# them — see recipe-custom-restructure-full-plan.md "Decisions locked") -----------------------
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Key(
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"CHAOS_BASE_DEPLOY",
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"bool",
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False,
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"DEPRECATED (P2 deletes): ship `tests/<recipe>/compose.ccci.yml` instead — the harness auto-copies it and auto-uses `--chaos` for the base deploy.",
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deprecated=True,
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),
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Key(
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"OIDC_AT_INSTALL",
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"bool",
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False,
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"DEPRECATED (P2 deletes): install-time deps provisioning becomes the ONLY mode when `DEPS` is set.",
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deprecated=True,
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),
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Key(
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"SKIP_GENERIC",
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"list[str]",
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[],
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"DEPRECATED (P2 deletes; zero users): suppress the generic floor for the listed ops. The env form `CCCI_SKIP_GENERIC*` stays as a dev-only escape hatch.",
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deprecated=True,
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),
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)
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_REGISTRY: dict[str, Key] = {k.name: k for k in KEYS}
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# The one validated, attribute-access view of a recipe's customization. Generated from KEYS so the
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# field set can never drift from the registry (frozen: consumers share one immutable object).
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RecipeMeta = dataclasses.make_dataclass(
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"RecipeMeta",
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[(k.name, object, dataclasses.field(default=None)) for k in KEYS],
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frozen=True,
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)
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RecipeMeta.__doc__ = (
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"Validated per-recipe customization (one field per registered key; attribute access). "
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"Built ONLY by meta.load()."
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)
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def meta_path(recipe: str, tests_dir: str | None = None) -> str:
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"""Canonical path of a recipe's meta file (pure)."""
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return os.path.join(tests_dir or TESTS_DIR, recipe, "recipe_meta.py")
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def _coerce(key: Key, value: object, path: str) -> object:
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"""Validate `value` against `key`'s declared type; normalize containers (tuple[int]/list[str]).
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Raises MetaError on mismatch — including a callable supplied for a data-typed key."""
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t = key.type
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if callable(value) and t not in ("hook", "dict_or_hook"):
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raise MetaError(
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f"{path}: {key.name} is a data key (type {t}) — callables are accepted only for "
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f"hook-typed keys"
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)
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if t == "int":
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if isinstance(value, int) and not isinstance(value, bool):
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return value
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elif t == "str":
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if isinstance(value, str):
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return value
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elif t == "bool":
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if isinstance(value, bool):
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return value
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elif t == "tuple[int]":
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if isinstance(value, tuple | list) and all(
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isinstance(x, int) and not isinstance(x, bool) for x in value
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):
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return tuple(value)
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elif t == "list[str]":
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if isinstance(value, tuple | list) and all(isinstance(x, str) for x in value):
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return list(value)
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elif t == "dict":
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if isinstance(value, dict):
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return value
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elif (
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t == "hook"
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and callable(value)
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or t == "dict_or_hook"
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and (isinstance(value, dict) or callable(value))
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):
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return value
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raise MetaError(f"{path}: {key.name} must be {t}, got {type(value).__name__} ({value!r})")
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def load(recipe: str, tests_dir: str | None = None):
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"""Load + validate a recipe's customization -> RecipeMeta. THE only exec() of recipe_meta.py.
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Missing file -> all registry defaults (the zero-config baseline, spec §2). Unknown
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non-underscore ALL-CAPS top-level name or type mismatch -> MetaError (hard error).
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`tests_dir` overrides the recipe-meta root (unit tests / fixtures)."""
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path = meta_path(recipe, tests_dir)
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values = {k.name: copy.copy(k.default) for k in KEYS}
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if os.path.exists(path):
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ns: dict = {}
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with open(path) as fh:
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exec(compile(fh.read(), path, "exec"), ns) # noqa: S102 (trusted, in-repo)
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for name in sorted(ns):
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if name.startswith("_") or not name.isupper():
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continue # _FOO = recipe-private (exempt); lowercase = helpers/imports (ignored)
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key = _REGISTRY.get(name)
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if key is None:
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near = difflib.get_close_matches(name, _REGISTRY, n=1)
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hint = f" — did you mean {near[0]!r}?" if near else ""
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raise MetaError(
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f"{path}: unknown recipe_meta key {name!r}{hint}. Registered keys: "
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f"{', '.join(sorted(_REGISTRY))}. Recipe-private constants must be "
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f"underscore-prefixed (e.g. _{name})."
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)
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values[name] = _coerce(key, ns[name], path)
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if key.validate:
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key.validate(values[name])
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return RecipeMeta(**values)
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def as_dict(meta) -> dict:
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"""RecipeMeta -> {key: value} (every registered key, defaults included)."""
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return dataclasses.asdict(meta)
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def non_default(meta) -> dict:
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"""The keys a recipe explicitly customized: {key: value} where value differs from the registry
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default. Hooks compare by identity-vs-None (a set hook is always non-default). Feeds the run's
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customization manifest (P5)."""
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out = {}
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for k in KEYS:
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v = getattr(meta, k.name)
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if v != k.default:
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out[k.name] = v
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return out
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def _env_map(value, domain: str) -> dict[str, str]:
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if callable(value):
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value = value(domain)
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return {str(k): str(v) for k, v in (value or {}).items()}
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def extra_env(meta, domain: str) -> dict[str, str]:
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"""Resolve EXTRA_ENV (dict or callable(domain)->dict) to the concrete per-run env map."""
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return _env_map(meta.EXTRA_ENV, domain)
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def upgrade_extra_env(meta, domain: str) -> dict[str, str]:
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"""Resolve UPGRADE_EXTRA_ENV (dict or callable(domain)->dict) to the concrete env map."""
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return _env_map(meta.UPGRADE_EXTRA_ENV, domain)
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