Add ci scripts (#1)

* Add ci scripts

* Move config files to ci/kokoro/docker

* Remove dump-logs etc

* Simplified grpc installation

* Add Ubuntu 16.04 kokoro config

* Address code review

ci/check-style.sh

@@ -0,0 +1,81 @@
+#!/usr/bin/env bash
+# Copyright 2019 Google LLC
+#
+# 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.
+
+set -eu
+
+if [[ "${CHECK_STYLE}" != "yes" ]]; then
+  echo "Skipping code style check as it is disabled for this build."
+  exit 0
+fi
+
+# This script assumes it is running the top-level google-cloud-cpp directory.
+
+readonly BINDIR="$(dirname "$0")"
+
+# Build paths to ignore in find(1) commands by reading .gitignore.
+declare -a ignore=( -path ./.git )
+if [[ -f .gitignore ]]; then
+  while read -r line; do
+    case "${line}" in
+    [^#]*/*) ignore+=( -o -path "./$(expr "${line}" : '\(.*\)/')" ) ;;
+    [^#]*)   ignore+=( -o -name "${line}" ) ;;
+    esac
+  done < .gitignore
+fi
+
+replace_original_if_changed() {
+  if [[ $# != 2 ]]; then
+    return 1
+  fi
+
+  local original="$1"
+  local reformatted="$2"
+
+  if cmp -s "${original}" "${reformatted}"; then
+    rm -f "${reformatted}"
+  else
+    chmod --reference="${original}" "${reformatted}"
+    mv -f "${reformatted}" "${original}"
+  fi
+}
+
+# Apply cmake_format to all the CMake list files.
+#     https://github.com/cheshirekow/cmake_format
+find . \( "${ignore[@]}" \) -prune -o \
+       \( -name 'CMakeLists.txt' -o -name '*.cmake' \) \
+       -print0 |
+  while IFS= read -r -d $'\0' file; do
+    cmake-format "${file}" >"${file}.tmp"
+    replace_original_if_changed "${file}" "${file}.tmp"
+  done
+
+# Apply buildifier to fix the BUILD and .bzl formatting rules.
+#    https://github.com/bazelbuild/buildtools/tree/master/buildifier
+find . \( "${ignore[@]}" \) -prune -o \
+       \( -name BUILD -o -name '*.bzl' \) \
+       -print0 |
+  xargs -0 buildifier -mode=fix
+
+# Apply shellcheck(1) to emit warnings for common scripting mistakes.
+find . \( "${ignore[@]}" \) -prune -o \
+       -iname '*.sh' -exec shellcheck \
+         --exclude=SC1090 \
+         --exclude=SC2034 \
+         --exclude=SC2153 \
+         --exclude=SC2181 \
+       '{}' \;
+
+# Report any differences created by running the formatting tools.
+git diff --ignore-submodules=all --color --exit-code .