text: import entrypoints
  import warnings
  import logging
  
  from mlflow.tracking.context.default_context import DefaultRunContext
  from mlflow.tracking.context.git_context import GitRunContext
  from mlflow.tracking.context.databricks_notebook_context import DatabricksNotebookRunContext
  from mlflow.tracking.context.databricks_job_context import DatabricksJobRunContext
  from mlflow.tracking.context.databricks_cluster_context import DatabricksClusterRunContext
  
  
  _logger = logging.getLogger(__name__)
  
  
  class RunContextProviderRegistry(object):
      """Registry for run context provider implementations
  
      This class allows the registration of a run context provider which can be used to infer meta
      information about the context of an MLflow experiment run. Implementations declared though the
      entrypoints `mlflow.run_context_provider` group can be automatically registered through the
      `register_entrypoints` method.
  
      Registered run context providers can return tags that override those implemented in the core
      library, however the order in which plugins are resolved is undefined.
      """
  
      def __init__(self):
          self._registry = []
  
      def register(self, run_context_provider_cls):
          self._registry.append(run_context_provider_cls())
  
      def register_entrypoints(self):
          """Register tracking stores provided by other packages"""
          for entrypoint in entrypoints.get_group_all("mlflow.run_context_provider"):
              try:
                  self.register(entrypoint.load())
              except (AttributeError, ImportError) as exc:
                  warnings.warn(
                      'Failure attempting to register context provider "{}": {}'.format(
                          entrypoint.name, str(exc)
                      ),
                      stacklevel=2,
                  )
  
      def __iter__(self):
          return iter(self._registry)
  
  
  _run_context_provider_registry = RunContextProviderRegistry()
  _run_context_provider_registry.register(DefaultRunContext)
  _run_context_provider_registry.register(GitRunContext)
  _run_context_provider_registry.register(DatabricksNotebookRunContext)
  _run_context_provider_registry.register(DatabricksJobRunContext)
  _run_context_provider_registry.register(DatabricksClusterRunContext)
  
  _run_context_provider_registry.register_entrypoints()
  
  
  def resolve_tags(tags=None):
      """Generate a set of tags for the current run context. Tags are resolved in the order,
      contexts are registered. Argument tags are applied last.
  
      This function iterates through all run context providers in the registry. Additional context
      providers can be registered as described in
      :py:class:`mlflow.tracking.context.RunContextProvider`.
  
      :param tags: A dictionary of tags to override. If specified, tags passed in this argument will
                   override those inferred from the context.
      :return: A dicitonary of resolved tags.
      """
  
      all_tags = {}
      for provider in _run_context_provider_registry:
          try:
              if provider.in_context():
                  all_tags.update(provider.tags())
          except Exception as e:  # pylint: disable=broad-except
              _logger.warning("Encountered unexpected error during resolving tags: %s", e)
  
      if tags is not None:
          all_tags.update(tags)
  
      return all_tags
  