| class BaseReporter(object): | |
| """Delegate class to provider progress reporting for the resolver.""" | |
| def starting(self): | |
| """Called before the resolution actually starts.""" | |
| def starting_round(self, index): | |
| """Called before each round of resolution starts. | |
| The index is zero-based. | |
| """ | |
| def ending_round(self, index, state): | |
| """Called before each round of resolution ends. | |
| This is NOT called if the resolution ends at this round. Use `ending` | |
| if you want to report finalization. The index is zero-based. | |
| """ | |
| def ending(self, state): | |
| """Called before the resolution ends successfully.""" | |
| def adding_requirement(self, requirement, parent): | |
| """Called when adding a new requirement into the resolve criteria. | |
| :param requirement: The additional requirement to be applied to filter | |
| the available candidaites. | |
| :param parent: The candidate that requires ``requirement`` as a | |
| dependency, or None if ``requirement`` is one of the root | |
| requirements passed in from ``Resolver.resolve()``. | |
| """ | |
| def resolving_conflicts(self, causes): | |
| """Called when starting to attempt requirement conflict resolution. | |
| :param causes: The information on the collision that caused the backtracking. | |
| """ | |
| def backtracking(self, candidate): | |
| """Called when rejecting a candidate during backtracking.""" | |
| def pinning(self, candidate): | |
| """Called when adding a candidate to the potential solution.""" |