Revert "Upgrade to Bazel 0.29 (including Windows RBE)"

templates/tools/dockerfile/bazel.include

@@ -2,7 +2,7 @@
 # Bazel installation
 
 # Must be in sync with tools/bazel
-ENV BAZEL_VERSION 0.29.0
+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=0.29.0
+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 0.29.0
+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

@@ -97,7 +97,7 @@ ENV CLANG_TIDY=clang-tidy
 # Bazel installation
 
 # Must be in sync with tools/bazel
-ENV BAZEL_VERSION 0.29.0
+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/internal_ci/windows/bazel_rbe.bat

@@ -14,7 +14,7 @@
 
 @rem TODO(jtattermusch): make this generate less output
 @rem TODO(jtattermusch): use tools/bazel script to keep the versions in sync
-choco install bazel -y --version 0.29.0 --limit-output
+choco install bazel -y --version 0.26.0 --limit-output
 
 cd github/grpc
 set PATH=C:\tools\msys64\usr\bin;C:\Python27;%PATH%
@@ -24,7 +24,7 @@ powershell -Command "[guid]::NewGuid().ToString()" >%KOKORO_ARTIFACTS_DIR%/bazel
 set /p BAZEL_INVOCATION_ID=<%KOKORO_ARTIFACTS_DIR%/bazel_invocation_ids
 
 @rem TODO(jtattermusch): windows RBE should be able to use the same credentials as Linux RBE.
-bazel --bazelrc=tools/remote_build/windows.bazelrc build --invocation_id="%BAZEL_INVOCATION_ID%" --workspace_status_command=tools/remote_build/workspace_status_kokoro.sh :all --google_credentials=%KOKORO_GFILE_DIR%/rbe-windows-credentials.json
+bazel --bazelrc=tools/remote_build/windows.bazelrc build --invocation_id="%BAZEL_INVOCATION_ID%" --workspace_status_command=tools/remote_build/workspace_status_kokoro.sh :all --incompatible_disallow_filetype=false --google_credentials=%KOKORO_GFILE_DIR%/rbe-windows-credentials.json
 set BAZEL_EXITCODE=%errorlevel%
 
 @rem TODO(jtattermusch): upload results to bigquery

tools/remote_build/windows.bazelrc

@@ -1,7 +1,8 @@
 startup --host_jvm_args=-Dbazel.DigestFunction=SHA256
 
-build --remote_cache=grpcs://remotebuildexecution.googleapis.com
-build --remote_executor=grpcs://remotebuildexecution.googleapis.com
+build --remote_cache=remotebuildexecution.googleapis.com
+build --remote_executor=remotebuildexecution.googleapis.com
+build --tls_enabled=true
 
 build --host_crosstool_top=//third_party/toolchains/bazel_0.26.0_rbe_windows:toolchain
 build --crosstool_top=//third_party/toolchains/bazel_0.26.0_rbe_windows:toolchain
@@ -37,7 +38,7 @@ test --test_env=GRPC_VERBOSITY=debug
 
 # Set flags for uploading to BES in order to view results in the Bazel Build
 # Results UI.
-build --bes_backend=grpcs://buildeventservice.googleapis.com
+build --bes_backend="buildeventservice.googleapis.com"
 build --bes_timeout=60s
 build --bes_results_url="https://source.cloud.google.com/results/invocations/"
 build --project_id=grpc-testing