83 lines
2.8 KiB
Python
83 lines
2.8 KiB
Python
from typing import List
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from dbt.clients.jinja import MacroStack
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from dbt.contracts.connection import AdapterRequiredConfig
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from dbt.contracts.graph.manifest import Manifest
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from dbt.context.macro_resolver import TestMacroNamespace
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from .configured import ConfiguredContext
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from .macros import MacroNamespaceBuilder
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class ManifestContext(ConfiguredContext):
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"""The Macro context has everything in the target context, plus the macros
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in the manifest.
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The given macros can override any previous context values, which will be
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available as if they were accessed relative to the package name.
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"""
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def __init__(
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self,
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config: AdapterRequiredConfig,
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manifest: Manifest,
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search_package: str,
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) -> None:
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super().__init__(config)
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self.manifest = manifest
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# this is the package of the node for which this context was built
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self.search_package = search_package
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self.macro_stack = MacroStack()
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# This namespace is used by the BaseDatabaseWrapper in jinja rendering.
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# The namespace is passed to it when it's constructed. It expects
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# to be able to do: namespace.get_from_package(..)
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self.namespace = self._build_namespace()
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def _build_namespace(self):
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# this takes all the macros in the manifest and adds them
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# to the MacroNamespaceBuilder stored in self.namespace
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builder = self._get_namespace_builder()
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return builder.build_namespace(
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self.manifest.macros.values(), self._ctx
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)
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def _get_namespace_builder(self) -> MacroNamespaceBuilder:
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# avoid an import loop
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from dbt.adapters.factory import get_adapter_package_names
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internal_packages: List[str] = get_adapter_package_names(
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self.config.credentials.type
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)
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return MacroNamespaceBuilder(
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self.config.project_name,
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self.search_package,
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self.macro_stack,
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internal_packages,
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None,
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)
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# This does not use the Mashumaro code
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def to_dict(self):
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dct = super().to_dict()
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# This moves all of the macros in the 'namespace' into top level
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# keys in the manifest dictionary
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if isinstance(self.namespace, TestMacroNamespace):
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dct.update(self.namespace.local_namespace)
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dct.update(self.namespace.project_namespace)
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else:
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dct.update(self.namespace)
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return dct
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class QueryHeaderContext(ManifestContext):
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def __init__(
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self, config: AdapterRequiredConfig, manifest: Manifest
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) -> None:
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super().__init__(config, manifest, config.project_name)
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def generate_query_header_context(
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config: AdapterRequiredConfig, manifest: Manifest
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):
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ctx = QueryHeaderContext(config, manifest)
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return ctx.to_dict()
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