old_contents: load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
  
  def buildifier_dependencies():
      _maybe(
          http_archive,
          name = "bazel_skylib",
          sha256 = "3b61715da37bc552cba875351e0c79ae150450d4cf3844b54b8c03cd2d0f481b",
          strip_prefix = "bazel-skylib-d7c5518fa061ae18a20d00b14082705d3d2d885d",
          url = "https://github.com/bazelbuild/bazel-skylib/archive/d7c5518fa061ae18a20d00b14082705d3d2d885d.tar.gz",  # 2018-11-21
      )
      _maybe(
          http_archive,
          name = "io_bazel",
          sha256 = "dd07fb88a3f4c9bb68416eb277bfbea20c982a9f4bd6525368d4e4beea55cb57",
          strip_prefix = "bazel-0.19.2",
          urls = [
              "http://mirror.bazel.build/github.com/bazelbuild/bazel/archive/0.19.2.tar.gz",
              "https://github.com/bazelbuild/bazel/archive/0.19.2.tar.gz",
          ],
      )
  
  def _maybe(repo_rule, name, **kwargs):
      if name not in native.existing_rules():
          repo_rule(name = name, **kwargs)
  
new_contents: load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
  
  def buildifier_dependencies():
      _maybe(
          http_archive,
          name = "bazel_skylib",
          sha256 = "3b61715da37bc552cba875351e0c79ae150450d4cf3844b54b8c03cd2d0f481b",
          strip_prefix = "bazel-skylib-d7c5518fa061ae18a20d00b14082705d3d2d885d",
          url = "https://github.com/bazelbuild/bazel-skylib/archive/d7c5518fa061ae18a20d00b14082705d3d2d885d.tar.gz",  # 2018-11-21
      )
      _maybe(
          http_archive,
          name = "io_bazel",
          sha256 = "f59608e56b0b68fe9b18661ae3d10f6a61aaa5f70ed11f2db52e7bc6db516454",
          strip_prefix = "bazel-0.20.0",
          urls = [
              "http://mirror.bazel.build/github.com/bazelbuild/bazel/archive/0.20.0.tar.gz",
              "https://github.com/bazelbuild/bazel/archive/0.20.0.tar.gz",
          ],
      )
  
  def _maybe(repo_rule, name, **kwargs):
      if name not in native.existing_rules():
          repo_rule(name = name, **kwargs)
  
subject: Update bazel in buildifier deps to 0.20.0 (#478)