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import argparse
from dataclasses import replace
from pathlib import Path
from textwrap import dedent
import codegen.aliases_patch as aliases_patch
import codegen.generated_dataclass as generated_dataclass
import codegen.generated_dataclass_patch as generated_dataclass_patch
import codegen.generated_enum as generated_enum
import codegen.generated_imports as generated_imports
import codegen.jsonschema as openapi
import codegen.jsonschema_patch as openapi_patch
import codegen.packages as packages
from codegen.code_builder import CodeBuilder
from codegen.generated_dataclass import GeneratedDataclass, GeneratedType
from codegen.generated_enum import GeneratedEnum
def main(output: str):
schemas = openapi.get_schemas()
schemas = openapi_patch.add_extra_required_fields(schemas)
schemas = openapi_patch.remove_unsupported_fields(schemas)
schemas = _transitively_mark_deprecated_and_private(
packages.RESOURCE_TYPES, schemas
)
# first remove deprecated fields so there are more unused schemas
schemas = _remove_deprecated_fields(schemas)
schemas = _remove_unused_schemas(packages.RESOURCE_TYPES, schemas)
# each resource has own namespace and is generated separately so
# that there are no dependencies between namespaces as in Databricks SDK v1
for resource, namespace in packages.RESOURCE_NAMESPACE.items():
# only generate code for schemas used directly or transitively by resource
reachable = _collect_reachable_schemas([resource], schemas)
reachable_schemas = {k: v for k, v in schemas.items() if k in reachable}
dataclasses, enums = _generate_code(namespace, reachable_schemas)
generated_dataclass_patch.reorder_required_fields(dataclasses)
generated_dataclass_patch.quote_recursive_references(dataclasses)
_write_code(dataclasses, enums, output)
_write_exports(namespace, dataclasses, enums, output)
def _transitively_mark_deprecated_and_private(
roots: list[str],
schemas: dict[str, openapi.Schema],
) -> dict[str, openapi.Schema]:
"""
If schema is only used through deprecated (private) fields, make it as deprecated (private).
For example, if a field is marked as private, and is excluded from documentation, corresponding
dataclasses and enums should be private as well.
"""
not_private = _collect_reachable_schemas(roots, schemas, include_private=False)
not_deprecated = _collect_reachable_schemas(
roots, schemas, include_deprecated=False
)
new_schemas = {}
for schema_name, schema in schemas.items():
if schema_name not in not_private:
schema.stage = openapi.Stage.PRIVATE
if schema_name not in not_deprecated:
schema.deprecated = True
new_schemas[schema_name] = schema
return new_schemas
def _remove_deprecated_fields(
schemas: dict[str, openapi.Schema],
) -> dict[str, openapi.Schema]:
"""
Remove fields that were deprecated during Private Preview.
"""
new_schemas = {}
for name, schema in schemas.items():
if schema.type == openapi.SchemaType.OBJECT:
new_properties = {}
for field_name, field in schema.properties.items():
if field.deprecated and field.stage == openapi.Stage.PRIVATE:
continue
new_properties[field_name] = field
new_schemas[name] = replace(schema, properties=new_properties)
else:
new_schemas[name] = schema
return new_schemas
def _generate_code(
namespace: str,
schemas: dict[str, openapi.Schema],
) -> tuple[dict[str, GeneratedDataclass], dict[str, GeneratedEnum]]:
dataclasses = {}
enums = {}
for schema_name, schema in schemas.items():
if schema.type == openapi.SchemaType.OBJECT:
generated = generated_dataclass.generate_dataclass(
namespace, schema_name, schema
)
dataclasses[schema_name] = generated
elif schema.type == openapi.SchemaType.STRING:
generated = generated_enum.generate_enum(namespace, schema_name, schema)
enums[schema_name] = generated
else:
raise ValueError(f"Unknown type: {schema.type}")
return dataclasses, enums
def _write_exports(
namespace: str,
dataclasses: dict[str, GeneratedDataclass],
enums: dict[str, GeneratedEnum],
output: str,
):
exports = []
for _, dataclass in dataclasses.items():
exports += [
dataclass.class_name,
f"{dataclass.class_name}Dict",
f"{dataclass.class_name}Param",
]
for _, enum in enums.items():
exports += [enum.class_name, f"{enum.class_name}Param"]
aliases = aliases_patch.ALIASES.get(namespace, {})
exports.sort()
b = CodeBuilder()
b.append("__all__ = [\n")
for export in exports:
b.indent().append_repr(export).append(",").newline()
for old_name in sorted(aliases):
b.indent().append_repr(old_name).append(",").newline()
b.append("]").newline()
b.newline()
b.newline()
generated_imports.append_dataclass_imports(b, dataclasses, exclude_packages=[])
generated_imports.append_enum_imports(b, enums, exclude_packages=[])
# FIXME should be better generalized
if namespace == "jobs":
_append_resolve_recursive_imports(b)
if aliases:
b.newline()
for old_name, new_name in sorted(aliases.items()):
b.append(f"{old_name} = {new_name}").newline()
root_package = packages.get_root_package(namespace)
package_path = Path(root_package.replace(".", "/"))
source_path = Path(output) / package_path / "__init__.py"
source_path.parent.mkdir(exist_ok=True, parents=True)
source_path.write_text(b.build())
print(f"Writing exports into {source_path}")
def _append_resolve_recursive_imports(b: CodeBuilder):
"""
Resolve forward references for recursive imports so we can assume that there are no forward references
while inspecting type annotations.
"""
b.append(
dedent("""
def _resolve_recursive_imports():
import typing
from databricks.bundles.core._variable import VariableOr
from databricks.bundles.jobs._models.task import Task
ForEachTask.__annotations__ = typing.get_type_hints(
ForEachTask,
globalns={"Task": Task, "VariableOr": VariableOr},
)
_resolve_recursive_imports()
""")
)
def _collect_typechecking_imports(
generated: GeneratedDataclass,
) -> dict[str, list[str]]:
out = {}
def visit_type(type_name: GeneratedType):
if type_name.name.startswith('"'):
out[type_name.package] = out.get(type_name.package, [])
out[type_name.package].append(type_name.name.strip('"'))
for parameter in type_name.parameters:
visit_type(parameter)
for field in generated.fields:
visit_type(field.type_name)
visit_type(field.param_type_name)
return out
def _collect_reachable_schemas(
roots: list[str],
schemas: dict[str, openapi.Schema],
include_private: bool = True,
include_deprecated: bool = True,
) -> set[str]:
"""
Remove schemas that are not reachable from the roots, because we
don't want to generate code for them.
"""
reachable = set(packages.PRIMITIVES)
stack = []
for root in roots:
stack.append(root)
while stack:
current = stack.pop()
if current in reachable:
continue
reachable.add(current)
schema = schemas[current]
if schema.type == openapi.SchemaType.OBJECT:
for field in schema.properties.values():
if field.ref:
name = field.ref.split("/")[-1]
if not include_private and field.stage == openapi.Stage.PRIVATE:
continue
if not include_deprecated and field.deprecated:
continue
if name not in reachable:
stack.append(name)
return reachable
def _remove_unused_schemas(
roots: list[str],
schemas: dict[str, openapi.Schema],
) -> dict[str, openapi.Schema]:
"""
Remove schemas that are not reachable from the roots, because we
don't want to generate code for them.
"""
reachable = _collect_reachable_schemas(roots, schemas)
return {k: v for k, v in schemas.items() if k in reachable}
def _write_code(
dataclasses: dict[str, GeneratedDataclass],
enums: dict[str, GeneratedEnum],
output: str,
):
package_code = {}
typechecking_imports = {}
for schema_name, generated in dataclasses.items():
package = generated.package
code = generated_dataclass.get_code(generated)
typechecking_imports[package] = _collect_typechecking_imports(generated)
typechecking_imports[package]["typing_extensions"] = ["Self"]
package_code[package] = package_code.get(package, "")
package_code[package] += "\n" + code
for schema_name, generated in enums.items():
package = generated.package
code = generated_enum.get_code(generated)
package_code[package] = package_code.get(package, "")
package_code[package] += "\n" + code
package_code = {
package: generated_imports.get_code(
dataclasses,
enums,
# don't import package from itself
exclude_packages=[package],
typechecking_imports=typechecking_imports.get(package, {}),
)
+ code
for package, code in package_code.items()
}
for package, code in package_code.items():
package_path = package.replace(".", "/")
source_path = Path(output) / (package_path + ".py")
source_path.parent.mkdir(exist_ok=True, parents=True)
source_path.write_text(code)
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--output", type=str)
args = parser.parse_args()
main(args.output)