Added GitHub Action to test for clang-format.

.github/workflows/bazel_tests.yml

@@ -1,4 +1,4 @@
-name: Bazel Tests
+name: Check ClangFormat
 
 on:
   push:
@@ -10,27 +10,11 @@ on:
   workflow_dispatch:
 
 jobs:
-
-  ubuntu:
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      fail-fast: false   # Don't cancel all jobs if one fails.
-      matrix:
-        include:
-          - { CC: clang, os: ubuntu-20.04, flags: "" }
-          - { CC: clang, os: ubuntu-20.04, flags: "-c opt" }  # Some warnings only fire with -c opt
-          - { CC: gcc, os: ubuntu-20.04, flags: "-c opt" }
-          - { CC: clang, os: ubuntu-20.04, flags: "--//:fasttable_enabled=true -- -cmake:test_generated_files" }
-          - { CC: clang, os: ubuntu-20.04, flags: "--config=asan -- -benchmarks:benchmark -python/..." }
-          - { CC: clang, os: macos-11, flags: "" }
-
+  check_clang_format:
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
-      - name: Setup Python venv
-        run: rm -rf /tmp/venv && python3 -m venv /tmp/venv
-      - name: Install dependencies
-        run: sudo apt install -y ${{ matrix.install }}
-        if: matrix.install != ''
-      - name: Run tests
-        run: cd ${{ github.workspace }} && PATH=/tmp/venv/bin:$PATH CC=${{ matrix.CC }} bazel test --test_output=errors ... ${{ matrix.flags }}
+      - name: Run ClangFormat
+        run: find . | grep -E '\.(c|h|cc)$' | grep -E -v '^./(third_party|cmake)' | xargs clang-format -i
+      - name: Check for differences
+        run: git diff --exit-code

tests/test_cpp.cc

@@ -35,11 +35,11 @@
 #include <set>
 #include <sstream>
 
+#include "google/protobuf/timestamp.upb.h"
+#include "google/protobuf/timestamp.upbdefs.h"
 #include "gtest/gtest.h"
 #include "tests/test_cpp.upb.h"
 #include "tests/test_cpp.upbdefs.h"
-#include "google/protobuf/timestamp.upb.h"
-#include "google/protobuf/timestamp.upbdefs.h"
 #include "upb/def.h"
 #include "upb/def.hpp"
 #include "upb/json_decode.h"
@@ -155,26 +155,30 @@ TEST(Cpp, TimestampEncoder) {
   upb::SymbolTable symtab;
   upb::Arena arena;
   upb::MessageDefPtr md(google_protobuf_Timestamp_getmsgdef(symtab.ptr()));
-  google_protobuf_Timestamp* timestamp_upb = google_protobuf_Timestamp_new(arena.ptr());
-  google_protobuf_Timestamp* timestamp_upb_decoded = google_protobuf_Timestamp_new(arena.ptr());
-
+  google_protobuf_Timestamp* timestamp_upb =
+      google_protobuf_Timestamp_new(arena.ptr());
+  google_protobuf_Timestamp* timestamp_upb_decoded =
+      google_protobuf_Timestamp_new(arena.ptr());
 
   long timestamps[] = {
-    253402300799,	// 9999-12-31T23:59:59Z
-    1641006000,		// 2022-01-01T03:00:00Z
-    0,			// 1970-01-01T00:00:00Z
-    -31525200,		// 1969-01-01T03:00:00Z
-    -2208988800,	// 1900-01-01T00:00:00Z
-    -62135596800,	// 0000-01-01T00:00:00Z
+      253402300799,  // 9999-12-31T23:59:59Z
+      1641006000,    // 2022-01-01T03:00:00Z
+      0,             // 1970-01-01T00:00:00Z
+      -31525200,     // 1969-01-01T03:00:00Z
+      -2208988800,   // 1900-01-01T00:00:00Z
+      -62135596800,  // 0000-01-01T00:00:00Z
   };
 
-  for(long timestamp: timestamps) {
+  for (long timestamp : timestamps) {
     google_protobuf_Timestamp_set_seconds(timestamp_upb, timestamp);
 
     char json[128];
-    size_t size = upb_JsonEncode(timestamp_upb, md.ptr(), NULL, 0, json, sizeof(json), NULL);
-    bool result = upb_JsonDecode(json, size, timestamp_upb_decoded, md.ptr(), NULL, 0, arena.ptr(), NULL);
-    const long timestamp_decoded = google_protobuf_Timestamp_seconds(timestamp_upb_decoded); 
+    size_t size = upb_JsonEncode(timestamp_upb, md.ptr(), NULL, 0, json,
+                                 sizeof(json), NULL);
+    bool result = upb_JsonDecode(json, size, timestamp_upb_decoded, md.ptr(),
+                                 NULL, 0, arena.ptr(), NULL);
+    const long timestamp_decoded =
+        google_protobuf_Timestamp_seconds(timestamp_upb_decoded);
 
     ASSERT_TRUE(result);
     EXPECT_EQ(timestamp, timestamp_decoded);

tests/test_generated_code.cc

@@ -296,12 +296,14 @@ static void check_int32_map_one_entry(
   EXPECT_EQ(
       1, protobuf_test_messages_proto3_TestAllTypesProto3_map_int32_int32_size(
              msg));
-  EXPECT_TRUE(protobuf_test_messages_proto3_TestAllTypesProto3_map_int32_int32_get(
-      msg, test_int32, &val));
+  EXPECT_TRUE(
+      protobuf_test_messages_proto3_TestAllTypesProto3_map_int32_int32_get(
+          msg, test_int32, &val));
   EXPECT_EQ(val, test_int32_2);
 
-  EXPECT_FALSE(protobuf_test_messages_proto3_TestAllTypesProto3_map_int32_int32_get(
-      msg, test_int32_3, &val));
+  EXPECT_FALSE(
+      protobuf_test_messages_proto3_TestAllTypesProto3_map_int32_int32_get(
+          msg, test_int32_3, &val));
 
   /* Test that iteration reveals a single k/v pair in the map. */
   iter = kUpb_Map_Begin;

tests/test_table.cc

@@ -460,7 +460,7 @@ TEST_P(IntTableTest, TestIntTable) {
   uint32_t largest_key = 0;
   std::map<uint32_t, uint32_t> m;
   std::unordered_map<uint32_t, uint32_t> hm;
-  for (const auto& key: keys_) {
+  for (const auto& key : keys_) {
     largest_key = UPB_MAX((int32_t)largest_key, key);
     table.Insert(key, key * 2);
     m[key] = key * 2;

upb/json_encode.c

@@ -162,7 +162,7 @@ static void jsonenc_timestamp(jsonenc* e, const upb_Message* msg,
    * Fliegel, H. F., and Van Flandern, T. C., "A Machine Algorithm for
    *   Processing Calendar Dates," Communications of the Association of
    *   Computing Machines, vol. 11 (1968), p. 657.  */
-  seconds += 62135596800; // Ensure seconds is positive. 
+  seconds += 62135596800;  // Ensure seconds is positive.
   L = (int)(seconds / 86400) - 719162 + 68569 + 2440588;
   N = 4 * L / 146097;
   L = L - (146097 * N + 3) / 4;

upb/upb.c

@@ -341,7 +341,6 @@ static void upb_FixLocale(char* p) {
   }
 }
 
-
 void _upb_EncodeRoundTripDouble(double val, char* buf, size_t size) {
   assert(size >= kUpb_RoundTripBufferSize);
   snprintf(buf, size, "%.*g", DBL_DIG, val);

upb/upb_internal.h

@@ -61,9 +61,7 @@ struct upb_Arena {
 // the beginning.
 //
 // The given buffer size must be at least kUpb_RoundTripBufferSize.
-enum {
-  kUpb_RoundTripBufferSize = 32
-};
+enum { kUpb_RoundTripBufferSize = 32 };
 void _upb_EncodeRoundTripDouble(double val, char* buf, size_t size);
 void _upb_EncodeRoundTripFloat(float val, char* buf, size_t size);