old_contents: # Copyright 2018 The Bazel Authors. All rights reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Definitions for handling Bazel repositories used by apple_support."""
  
  load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
  
  def _maybe(repo_rule, name, **kwargs):
      """Executes the given repository rule if it hasn't been executed already.
  
      Args:
        repo_rule: The repository rule to be executed (e.g., `git_repository`.)
        name: The name of the repository to be defined by the rule.
        **kwargs: Additional arguments passed directly to the repository rule.
      """
      if name not in native.existing_rules():
          repo_rule(name = name, **kwargs)
  
  def apple_support_dependencies():
      """Fetches repository dependencies of the `apple_support` workspace.
  
      Users should call this macro in their `WORKSPACE` to ensure that all of the
      dependencies of the Swift rules are downloaded and that they are isolated from
      changes to those dependencies.
      """
      _maybe(
          git_repository,
          name = "bazel_skylib",
          remote = "https://github.com/bazelbuild/bazel-skylib.git",
          tag = "0.5.0",
      )
  
new_contents: # Copyright 2018 The Bazel Authors. All rights reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Definitions for handling Bazel repositories used by apple_support."""
  
  load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
  
  def _maybe(repo_rule, name, **kwargs):
      """Executes the given repository rule if it hasn't been executed already.
  
      Args:
        repo_rule: The repository rule to be executed (e.g., `git_repository`.)
        name: The name of the repository to be defined by the rule.
        **kwargs: Additional arguments passed directly to the repository rule.
      """
      if name not in native.existing_rules():
          repo_rule(name = name, **kwargs)
  
  def apple_support_dependencies():
      """Fetches repository dependencies of the `apple_support` workspace.
  
      Users should call this macro in their `WORKSPACE` to ensure that all of the
      dependencies of the Swift rules are downloaded and that they are isolated from
      changes to those dependencies.
      """
      _maybe(
          git_repository,
          name = "bazel_skylib",
          remote = "https://github.com/bazelbuild/bazel-skylib.git",
          tag = "0.6.0",
      )
  
subject: Move skylib to the 0.6.0 release (Nov 2018)