Merge pull request #17926 from acozzette/bazel-skylib

Added bazel_skylib dependency in preparation for protobuf update

bazel/grpc_deps.bzl

@@ -185,6 +185,14 @@ def grpc_deps():
             sha256 = "ee854b5de299138c1f4a2edb5573d22b21d975acfc7aa938f36d30b49ef97498",
         )
 
+    if "bazel_skylib" not in native.existing_rules():
+        http_archive(
+            name = "bazel_skylib",
+            sha256 = "ba5d15ca230efca96320085d8e4d58da826d1f81b444ef8afccd8b23e0799b52",
+            strip_prefix = "bazel-skylib-f83cb8dd6f5658bc574ccd873e25197055265d1c",
+            url = "https://github.com/bazelbuild/bazel-skylib/archive/f83cb8dd6f5658bc574ccd873e25197055265d1c.tar.gz",
+        )
+
     if "io_opencensus_cpp" not in native.existing_rules():
         http_archive(
             name = "io_opencensus_cpp",

tools/run_tests/sanity/check_bazel_workspace.py

@@ -34,6 +34,7 @@ git_submodule_hashes = {
     for s in git_submodules
 }
 
+_BAZEL_SKYLIB_DEP_NAME = 'bazel_skylib'
 _BAZEL_TOOLCHAINS_DEP_NAME = 'com_github_bazelbuild_bazeltoolchains'
 _TWISTED_TWISTED_DEP_NAME = 'com_github_twisted_twisted'
 _YAML_PYYAML_DEP_NAME = 'com_github_yaml_pyyaml'
@@ -53,6 +54,7 @@ _GRPC_DEP_NAMES = [
     'com_github_cares_cares',
     'com_google_absl',
     'io_opencensus_cpp',
+    _BAZEL_SKYLIB_DEP_NAME,
     _BAZEL_TOOLCHAINS_DEP_NAME,
     _TWISTED_TWISTED_DEP_NAME,
     _YAML_PYYAML_DEP_NAME,
@@ -62,6 +64,7 @@ _GRPC_DEP_NAMES = [
 ]
 
 _GRPC_BAZEL_ONLY_DEPS = [
+    _BAZEL_SKYLIB_DEP_NAME,
     _BAZEL_TOOLCHAINS_DEP_NAME,
     _TWISTED_TWISTED_DEP_NAME,
     _YAML_PYYAML_DEP_NAME,