Add basic support for clang-format

Author: Michael Penick

cpp-driver/src/.clang-format .clang-formatcpp-driver/src/.clang-format renamed to .clang-format

@@ -24,4 +24,3 @@ Cpp11BracedListStyle: false
 AlwaysBreakTemplateDeclarations: true
 BreakBeforeInheritanceComma: true
 ...
-

CMakeLists.txt

@@ -17,6 +17,7 @@ list(APPEND CMAKE_MODULE_PATH ${CASS_ROOT_DIR}/cmake/modules
 )
 
 include(CppDriver)
+include(ClangFormat)
 
 CassInitProject(dse)
 CassRapidJson()

cpp-driver/.clang-format

@@ -0,0 +1,26 @@
+---
+BasedOnStyle: LLVM
+Language: Cpp
+AccessModifierOffset: -2
+IndentWidth: 2
+TabWidth: 8
+ColumnLimit: 100
+UseTab: Never
+IndentCaseLabels: true
+AlignAfterOpenBracket: true
+AlignEscapedNewlines: Left
+BreakConstructorInitializers: BeforeComma
+AllowShortBlocksOnASingleLine: false
+DerivePointerAlignment: false
+PointerAlignment: Left
+BinPackParameters: true
+BinPackArguments: true
+AllowShortIfStatementsOnASingleLine: true
+CompactNamespaces: true
+AlignOperands: true
+SpacesInContainerLiterals: true
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+Cpp11BracedListStyle: false
+AlwaysBreakTemplateDeclarations: true
+BreakBeforeInheritanceComma: true
+...

cpp-driver/cmake/modules/ClangFormat.cmake

@@ -0,0 +1,49 @@
+#
+# Format and verify formatting using clang-format
+#
+cmake_minimum_required(VERSION 2.6.4)
+
+include(FindPackageHandleStandardArgs)
+
+if(NOT CLANG_FORMAT_EXE_NAME)
+  set(CLANG_FORMAT_EXE_NAME clang-format)
+endif()
+
+if(CLANG_FORMAT_ROOT_DIR)
+  find_program(CLANG_FORMAT_EXE
+    NAMES ${CLANG_FORMAT_EXE_NAME}
+    PATHS ${CLANG_FORMAT_ROOT_DIR}
+    NO_DEFAULT_PATH)
+endif()
+
+find_program(CLANG_FORMAT_EXE NAMES ${CLANG_FORMAT_EXE_NAME})
+
+find_package_handle_standard_args(CLANG_FORMAT DEFAULT_MSG CLANG_FORMAT_EXE)
+
+mark_as_advanced(CLANG_FORMAT_EXE)
+
+if(CLANG_FORMAT_FOUND)
+  set(CLANG_FORMAT_FILE_EXTENSIONS ${CLANG_FORMAT_CXX_FILE_EXTENSIONS} *.cpp *.hpp *.c *.h)
+  file(GLOB_RECURSE CLANG_FORMAT_ALL_SOURCE_FILES ${CLANG_FORMAT_FILE_EXTENSIONS})
+
+  set(CLANG_FORMAT_EXCLUDE_PATTERNS ${CLANG_FORMAT_EXCLUDE_PATTERNS} "/CMakeFiles/" "cmake" "/build/" "/vendor/" "/third_party/" "cassandra.h" "dse.h")
+
+  foreach (SOURCE_FILE ${CLANG_FORMAT_ALL_SOURCE_FILES})
+    foreach (EXCLUDE_PATTERN ${CLANG_FORMAT_EXCLUDE_PATTERNS})
+      string(FIND ${SOURCE_FILE} ${EXCLUDE_PATTERN} EXCLUDE_FOUND)
+      if (NOT ${EXCLUDE_FOUND} EQUAL -1)
+        list(REMOVE_ITEM CLANG_FORMAT_ALL_SOURCE_FILES ${SOURCE_FILE})
+      endif ()
+    endforeach ()
+  endforeach ()
+
+  add_custom_target(format
+    COMMENT "Format source files using clang-format"
+    COMMAND ${CLANG_FORMAT_EXE} -i -fallback-style=none -style=file ${CLANG_FORMAT_ALL_SOURCE_FILES})
+
+  add_custom_target(format-check
+    COMMENT "Verify source files formatting using clang-format"
+    COMMAND ! ${CLANG_FORMAT_EXE} -output-replacements-xml -fallback-style=none -style=file ${CLANG_FORMAT_ALL_SOURCE_FILES} | tee replacements.xml | grep -q "replacement offset")
+else()
+  message(STATUS "Unable to find clang-format. Not creating format targets.")
+endif()