"""The single failure type. Every validation/parse problem raises BuildError so
the CLI can print a uniform 'BUILD FAILED: <what> [<id>] (<file:line>)'."""


class BuildError(Exception):
    def __init__(self, message: str, source: str = "", entry_id: str = ""):
        self.message = message
        self.source = source
        self.entry_id = entry_id
        loc = f" [{entry_id}]" if entry_id else ""
        src = f" ({source})" if source else ""
        super().__init__(f"{message}{loc}{src}")