bump bazel version to 0.27

bazel/grpc_deps.bzl

@@ -176,11 +176,11 @@ def grpc_deps():
     if "bazel_toolchains" not in native.existing_rules():
         http_archive(
             name = "bazel_toolchains",
-            sha256 = "d968b414b32aa99c86977e1171645d31da2b52ac88060de3ac1e49932d5dcbf1",
-            strip_prefix = "bazel-toolchains-4bd5df80d77aa7f4fb943dfdfad5c9056a62fb47",
+            sha256 = "872955b658113924eb1a3594b04d43238da47f4f90c17b76e8785709490dc041",
+            strip_prefix = "bazel-toolchains-1083686fde6032378d52b4c98044922cebde364e",
             urls = [
-                "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/4bd5df80d77aa7f4fb943dfdfad5c9056a62fb47.tar.gz",
-                "https://github.com/bazelbuild/bazel-toolchains/archive/4bd5df80d77aa7f4fb943dfdfad5c9056a62fb47.tar.gz",
+                "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/1083686fde6032378d52b4c98044922cebde364e.tar.gz",
+                "https://github.com/bazelbuild/bazel-toolchains/archive/1083686fde6032378d52b4c98044922cebde364e.tar.gz",
             ],
         )
 

templates/tools/dockerfile/bazel.include

@@ -2,7 +2,7 @@
 # Bazel installation
 
 # Must be in sync with tools/bazel
-ENV BAZEL_VERSION 0.26.0
+ENV BAZEL_VERSION 0.28.1
 
 # The correct bazel version is already preinstalled, no need to use //tools/bazel wrapper.
 ENV DISABLE_BAZEL_WRAPPER 1

tools/bazel

@@ -32,7 +32,7 @@ then
   exec -a "$0" "${BAZEL_REAL}" "$@"
 fi
 
-VERSION=0.26.0
+VERSION=0.28.1
 
 echo "INFO: Running bazel wrapper (see //tools/bazel for details), bazel version $VERSION will be used instead of system-wide bazel installation."
 

tools/dockerfile/test/bazel/Dockerfile

@@ -52,7 +52,7 @@ RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.5.2.post1 six==1.10.0 t
 # Bazel installation
 
 # Must be in sync with tools/bazel
-ENV BAZEL_VERSION 0.26.0
+ENV BAZEL_VERSION 0.28.1
 
 # The correct bazel version is already preinstalled, no need to use //tools/bazel wrapper.
 ENV DISABLE_BAZEL_WRAPPER 1

tools/dockerfile/test/sanity/Dockerfile

@@ -98,7 +98,7 @@ ENV CLANG_TIDY=clang-tidy
 # Bazel installation
 
 # Must be in sync with tools/bazel
-ENV BAZEL_VERSION 0.26.0
+ENV BAZEL_VERSION 0.28.1
 
 # The correct bazel version is already preinstalled, no need to use //tools/bazel wrapper.
 ENV DISABLE_BAZEL_WRAPPER 1

tools/remote_build/kokoro.bazelrc

@@ -16,13 +16,12 @@
 
 import %workspace%/tools/remote_build/rbe_common.bazelrc
 
-build --remote_cache=remotebuildexecution.googleapis.com
-build --remote_executor=remotebuildexecution.googleapis.com
-build --tls_enabled=true
+build --remote_cache=grpcs://remotebuildexecution.googleapis.com
+build --remote_executor=grpcs://remotebuildexecution.googleapis.com
 
 build --auth_enabled=true
 
-build --bes_backend=buildeventservice.googleapis.com
+build --bes_backend=grpcs://buildeventservice.googleapis.com
 build --bes_timeout=600s
 build --project_id=grpc-testing
 

tools/remote_build/manual.bazelrc

@@ -17,9 +17,8 @@
 
 import %workspace%/tools/remote_build/rbe_common.bazelrc
 
-build --remote_cache=remotebuildexecution.googleapis.com
-build --remote_executor=remotebuildexecution.googleapis.com
-build --tls_enabled=true
+build --remote_cache=grpcs://remotebuildexecution.googleapis.com
+build --remote_executor=grpcs://remotebuildexecution.googleapis.com
 
 # Enable authentication. This will pick up application default credentials by
 # default. You can use --auth_credentials=some_file.json to use a service
@@ -30,7 +29,7 @@ build --auth_enabled=true
 
 # Set flags for uploading to BES in order to view results in the Bazel Build
 # Results UI.
-build --bes_backend="buildeventservice.googleapis.com"
+build --bes_backend=grpcs://buildeventservice.googleapis.com
 build --bes_timeout=60s
 build --bes_results_url="https://source.cloud.google.com/results/invocations/"
 build --project_id=grpc-testing

tools/remote_build/rbe_common.bazelrc

@@ -87,4 +87,4 @@ build:ubsan --test_timeout=3600
 # how to update the bazel toolchain for ubsan:
 # - check for the latest released version in https://github.com/bazelbuild/bazel-toolchains/tree/master/configs/experimental/ubuntu16_04_clang
 # - you might need to update the bazel_toolchains dependency in grpc_deps.bzl
-build:ubsan --crosstool_top=@bazel_toolchains//configs/experimental/ubuntu16_04_clang/1.2/bazel_0.23.0/ubsan:toolchain
+build:ubsan --crosstool_top=@bazel_toolchains//configs/experimental/ubuntu16_04_clang/1.2/bazel_0.28.0/ubsan:toolchain