Add a Travis check for code formatting. (#7)

- The helper script can also be used to autoformat the code.

- Format the code.

- Make bazel under Travis less chatty.

Author: g-easy

.travis.yml

@@ -9,5 +9,6 @@ before_install:
   - ./bazel-0.8.1-installer-linux-x86_64.sh --user
 
 script:
-  - bazel build -k //...
-  - bazel test -k //...
+  - bazel build --noshow_progress -k //...
+  - bazel test --noshow_progress -k //...
+  - ./format.sh

format.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Copyright 2017, OpenCensus Authors
+#
+# 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.
+#
+# Formats code under opencensus/, exits with 0 if there were no changes.
+set -e
+# For easier debugging: print the version because it affects the formatting.
+CMD=clang-format
+$CMD -version
+$CMD -i -style=Google $(find opencensus -name '*.cc' -or -name '*.h')
+CHANGED="$(git ls-files --modified)"
+if [[ ! -z "$CHANGED" ]]; then
+  echo "The following files have changes:"
+  echo "$CHANGED"
+  exit 1
+else
+  echo "No changes."
+fi

opencensus/common/internal/stats_object_test.cc

@@ -23,10 +23,10 @@
 #include <random>
 #include <utility>
 
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
 #include "absl/strings/str_join.h"
 #include "absl/types/span.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
 
 namespace opencensus {
 namespace common {

opencensus/trace/examples/span_example.cc

@@ -16,9 +16,9 @@
 #include <memory>
 #include <thread>
 
-#include "gtest/gtest.h"
 #include "absl/memory/memory.h"
 #include "absl/strings/str_cat.h"
+#include "gtest/gtest.h"
 #include "opencensus/trace/exporter/status.h"
 #include "opencensus/trace/sampler.h"
 #include "opencensus/trace/span.h"

opencensus/trace/internal/attribute_value_ref_test.cc

@@ -14,8 +14,8 @@
 
 #include "opencensus/trace/attribute_value_ref.h"
 
-#include "gtest/gtest.h"
 #include "absl/strings/str_cat.h"
+#include "gtest/gtest.h"
 
 namespace opencensus {
 namespace trace {

opencensus/trace/internal/attribute_value_test.cc

@@ -14,8 +14,8 @@
 
 #include "opencensus/trace/exporter/attribute_value.h"
 
-#include "gtest/gtest.h"
 #include "absl/strings/str_cat.h"
+#include "gtest/gtest.h"
 #include "opencensus/trace/attribute_value_ref.h"
 
 namespace opencensus {

opencensus/trace/internal/running_span_store_test.cc

@@ -19,8 +19,8 @@
 #include <unordered_map>
 #include <vector>
 
-#include "gtest/gtest.h"
 #include "absl/memory/memory.h"
+#include "gtest/gtest.h"
 #include "opencensus/trace/exporter/attribute_value.h"
 #include "opencensus/trace/exporter/span_data.h"
 #include "opencensus/trace/exporter/status.h"

opencensus/trace/internal/span_exporter_test.cc

@@ -14,9 +14,9 @@
 
 #include "opencensus/trace/exporter/span_exporter.h"
 
-#include "gtest/gtest.h"
 #include "absl/memory/memory.h"
 #include "absl/synchronization/mutex.h"
+#include "gtest/gtest.h"
 #include "opencensus/trace/exporter/span_data.h"
 #include "opencensus/trace/sampler.h"
 #include "opencensus/trace/span.h"

opencensus/trace/internal/span_options_test.cc

@@ -14,9 +14,9 @@
 
 #include <memory>
 
-#include "gtest/gtest.h"
 #include "absl/strings/string_view.h"
 #include "absl/synchronization/mutex.h"
+#include "gtest/gtest.h"
 #include "opencensus/trace/exporter/message_event.h"
 #include "opencensus/trace/exporter/status.h"
 #include "opencensus/trace/internal/span_impl.h"

opencensus/trace/internal/trace_config.cc

@@ -12,8 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "opencensus/trace/internal/trace_config_impl.h"
 #include "opencensus/trace/trace_config.h"
+
+#include "opencensus/trace/internal/trace_config_impl.h"
 #include "opencensus/trace/trace_params.h"
 
 namespace opencensus {