| """Functionality shared by multiple pieces of code.""" |
| |
| def copy_propagating_kwargs(from_kwargs, into_kwargs = None): |
| """Copies args that must be compatible between two targets with a dependency relationship. |
| |
| This is intended for when one target depends on another, so they must have |
| compatible settings such as `testonly` and `compatible_with`. This usually |
| happens when a macro generates multiple targets, some of which depend |
| on one another, so their settings must be compatible. |
| |
| Args: |
| from_kwargs: keyword args dict whose common kwarg will be copied. |
| into_kwargs: optional keyword args dict that the values from `from_kwargs` |
| will be copied into. The values in this dict will take precedence |
| over the ones in `from_kwargs` (i.e., if this has `testonly` already |
| set, then it won't be overwritten). |
| NOTE: THIS WILL BE MODIFIED IN-PLACE. |
| |
| Returns: |
| Keyword args to use for the depender target derived from the dependency |
| target. If `into_kwargs` was passed in, then that same object is |
| returned; this is to facilitate easy `**` expansion. |
| """ |
| if into_kwargs == None: |
| into_kwargs = {} |
| |
| # Include tags because people generally expect tags to propagate. |
| for attr in ("testonly", "tags", "compatible_with", "restricted_to"): |
| if attr in from_kwargs and attr not in into_kwargs: |
| into_kwargs[attr] = from_kwargs[attr] |
| return into_kwargs |
