In case we’re building docs in a background process, this method waits for that process to exit (or if it’s already been reaped, or never happened, swallows the Errno::ECHILD error).
@return [Integer] The index to which the resolution should unwind in the
case of conflict.
Attempts to swp the current {#possibility} with the already-activated spec with the given name @return [Boolean] Whether the possibility was swapped into {#activated}
Pushes a new {DependencyState} that encapsulates both existing and new requirements @param [Array] new_requirements @return [void]
Pushes a new {DependencyState}. If the {#specification_provider} says to {SpecificationProvider#allow_missing?} that particular requirement, and there are no possibilities for that requirement, then ‘state` is not pushed, and the node in {#activated} is removed, and we continue resolving the remaining requirements. @param [DependencyState] state @return [void]
Ensures any raised {NoSuchDependencyError} has its {NoSuchDependencyError#required_by} set. @yield