Use bundled gtest (#4900)

* Suggest to use gtest bundled with dmlc

* Use dmlc bundled gtest in all CI scripts

* Make clang-tidy to use dmlc embedded gtest

tests/ci_build/build_via_cmake.sh

@@ -1,20 +1,10 @@
 #!/usr/bin/env bash
 set -e
 
-# Build gtest via cmake
-rm -rf gtest
-wget -nc https://github.com/google/googletest/archive/release-1.7.0.zip
-unzip -n release-1.7.0.zip
-mv googletest-release-1.7.0 gtest && cd gtest
-cmake . && make
-mkdir lib && mv libgtest.a lib
-cd ..
-rm -rf release-1.7.0.zip*
-
 rm -rf build
 mkdir build
 cd build
-cmake .. "$@" -DGOOGLE_TEST=ON -DGTEST_ROOT=$PWD/../gtest -DCMAKE_VERBOSE_MAKEFILE=ON
+cmake .. "$@" -DGOOGLE_TEST=ON -DUSE_DMLC_GTEST=ON -DCMAKE_VERBOSE_MAKEFILE=ON
 make clean
 make -j$(nproc)
 cd ..

tests/ci_build/clang_tidy.sh

@@ -1,18 +0,0 @@
-#!/bin/bash
-
-export GTEST_PKG_NAME=release-1.8.1
-export GTEST_DIR_NAME=googletest-${GTEST_PKG_NAME}  # uncompressed directory
-export GTEST_ZIP_FILE=${GTEST_PKG_NAME}.zip	    # downloaded zip ball name
-
-rm -rf gtest googletest-release*
-
-wget -nc https://github.com/google/googletest/archive/${GTEST_ZIP_FILE}
-unzip -n ${GTEST_ZIP_FILE}
-mv ${GTEST_DIR_NAME} gtest && cd gtest
-cmake . -DCMAKE_INSTALL_PREFIX=./ins && make
-make install
-
-cd ..
-rm ${GTEST_ZIP_FILE}
-
-python3 tests/ci_build/tidy.py --gtest-path=${PWD}/gtest/ins

tests/ci_build/tidy.py

@@ -29,15 +29,12 @@ class ClangTidy(object):
     '''
     clang tidy wrapper.
     Args:
-      gtest_path: Full path of Google Test library.
       cpp_lint: Run linter on C++ source code.
       cuda_lint: Run linter on CUDA source code.
     '''
-    def __init__(self, gtest_path, cpp_lint, cuda_lint):
-        self.gtest_path = gtest_path
+    def __init__(self, cpp_lint, cuda_lint):
         self.cpp_lint = cpp_lint
         self.cuda_lint = cuda_lint
-        print('Using Google Test from {}'.format(self.gtest_path))
         print('Run linter on CUDA: ', self.cuda_lint)
         print('Run linter on C++:', self.cpp_lint)
         if not self.cpp_lint and not self.cuda_lint:
@@ -61,8 +58,7 @@ class ClangTidy(object):
         os.mkdir(self.cdb_path)
         os.chdir(self.cdb_path)
         cmake_args = ['cmake', '..', '-DCMAKE_EXPORT_COMPILE_COMMANDS=ON',
-                      '-DGOOGLE_TEST=ON', '-DGTEST_ROOT={}'.format(
-                          self.gtest_path)]
+                      '-DGOOGLE_TEST=ON', '-DUSE_DMLC_GTEST=ON']
         if self.cuda_lint:
             cmake_args.extend(['-DUSE_CUDA=ON', '-DUSE_NCCL=ON'])
         subprocess.run(cmake_args)
@@ -108,6 +104,8 @@ class ClangTidy(object):
                         '--cuda-gpu-arch=sm_' + capability)
             elif components[i].find('--std=c++11') != -1:
                 converted_components.append('-std=c++11')
+            elif components[i].startswith('-isystem='):
+                converted_components.extend(components[i].split('='))
             else:
                 converted_components.append(components[i])
 
@@ -156,6 +154,7 @@ class ClangTidy(object):
                 return False
             isxgb = path.find('rabit') == -1
             isxgb = isxgb and path.find('dmlc-core') == -1
+            isxgb = isxgb and (not path.startswith(self.cdb_path))
             if isxgb:
                 return True
 
@@ -235,13 +234,11 @@ if __name__ == '__main__':
     parser = argparse.ArgumentParser(description='Run clang-tidy.')
     parser.add_argument('--cpp', type=int, default=1)
     parser.add_argument('--cuda', type=int, default=1)
-    parser.add_argument('--gtest-path', required=True,
-                        help='Full path of Google Test library directory')
     args = parser.parse_args()
 
     test_tidy()
 
-    with ClangTidy(args.gtest_path, args.cpp, args.cuda) as linter:
+    with ClangTidy(args.cpp, args.cuda) as linter:
         passed = linter.run()
     if not passed:
         sys.exit(1)

tests/cpp/common/test_enum_class_param.cc

@@ -31,7 +31,7 @@ TEST(EnumClassParam, Basic) {
     {"foo", "frog"}, {"bar", "10"}
   };
   // try initializing
-  param.Init(kwargs);
+  param.Init(kwargs); // NOLINT(clang-analyzer-core.UndefinedBinaryOperatorResult)
   ASSERT_EQ(param.foo, Foo::kFrog);
   ASSERT_EQ(param.bar, 10);
 

tests/travis/run_test.sh

@@ -33,20 +33,11 @@ fi
 
 if [ ${TASK} == "cmake_test" ]; then
     set -e
-    # Build gtest via cmake
-    wget -nc https://github.com/google/googletest/archive/release-1.7.0.zip
-    unzip -n release-1.7.0.zip
-    mv googletest-release-1.7.0 gtest && cd gtest
-    CC=gcc-7 CXX=g++-7 cmake . && make
-    mkdir lib && mv libgtest.a lib
-    cd ..
-    rm -rf release-1.7.0.zip
-
     # Build/test
     rm -rf build
     mkdir build && cd build
     PLUGINS="-DPLUGIN_LZ4=ON -DPLUGIN_DENSE_PARSER=ON"
-    CC=gcc-7 CXX=g++-7 cmake .. -DGOOGLE_TEST=ON -DGTEST_ROOT=$PWD/../gtest/ ${PLUGINS}
+    CC=gcc-7 CXX=g++-7 cmake .. -DGOOGLE_TEST=ON -DUSE_DMLC_GTEST=ON ${PLUGINS}
     make
     ./testxgboost
     cd ..