def from_json()

in tools/incremental_test/specification.py [0:0]

• 43 lines of code
• 12 McCabe index (conditional complexity)

    def from_json(input_json: Dict[str, Any]) -> "RepositoryUpdate":
        try:
            kind = input_json["kind"]
            if kind == "hg":
                return HgRepositoryUpdate(commit_hash=input_json["commit_hash"])
            elif kind == "patch":
                return PatchRepositoryUpdate(
                    patch=input_json["patch"],
                    patch_flags=input_json.get("patch_flags", ""),
                )
            elif kind == "file":
                changes = input_json.get("changes", {})
                removals = input_json.get("removals", [])
                if not isinstance(changes, dict):
                    raise InvalidSpecificationException(
                        "File changes must be specified as dicts"
                    )
                if not isinstance(removals, list):
                    raise InvalidSpecificationException(
                        "File removals must be specified as lists"
                    )
                if len(changes) == 0 and len(removals) == 0:
                    raise InvalidSpecificationException("No file change is given")
                return FileRepositoryUpdate(changes=changes, removals=removals)
            elif kind == "batch":
                updates = input_json["updates"]
                if not isinstance(updates, list):
                    raise InvalidSpecificationException(
                        "Batch updates must be specified as lists"
                    )
                parsed_updates: List[SingleUpdate] = []
                for update in updates:
                    parsed_update = RepositoryUpdate.from_json(update)
                    parsed_updates.extend(parsed_update.update_steps())
                return BatchRepositoryUpdate(parsed_updates)
            else:
                raise InvalidSpecificationException(
                    "Cannot create RepositoryUpdate due to unrecognized kind"
                )
        except KeyError as key:
            raise InvalidSpecificationException(
                f"Cannot create RepositoryUpdate due to missing field '{key}'"
            )