Add cmake targets for code formatting using clang-format

.clang-format

@@ -0,0 +1,96 @@
+---
+BasedOnStyle: LLVM
+IndentWidth: 2
+UseTab: Never
+...
+
+# ---
+# Language:        Cpp
+# BasedOnStyle:  LLVM
+# AccessModifierOffset: -2
+# AlignAfterOpenBracket: Align
+# AlignConsecutiveAssignments: false
+# AlignConsecutiveDeclarations: false
+# AlignEscapedNewlinesLeft: false
+# AlignOperands:   true
+# AlignTrailingComments: true
+# AllowAllParametersOfDeclarationOnNextLine: true
+# AllowShortBlocksOnASingleLine: false
+# AllowShortCaseLabelsOnASingleLine: false
+# AllowShortFunctionsOnASingleLine: All
+# AllowShortIfStatementsOnASingleLine: false
+# AllowShortLoopsOnASingleLine: false
+# AlwaysBreakAfterDefinitionReturnType: None
+# AlwaysBreakAfterReturnType: None
+# AlwaysBreakBeforeMultilineStrings: false
+# AlwaysBreakTemplateDeclarations: false
+# BinPackArguments: true
+# BinPackParameters: true
+# BraceWrapping:
+#   AfterClass:      false
+#   AfterControlStatement: false
+#   AfterEnum:       false
+#   AfterFunction:   false
+#   AfterNamespace:  false
+#   AfterObjCDeclaration: false
+#   AfterStruct:     false
+#   AfterUnion:      false
+#   BeforeCatch:     false
+#   BeforeElse:      false
+#   IndentBraces:    false
+# BreakBeforeBinaryOperators: None
+# BreakBeforeBraces: Attach
+# BreakBeforeTernaryOperators: true
+# BreakConstructorInitializersBeforeComma: false
+# ColumnLimit:     80
+# CommentPragmas:  '^ IWYU pragma:'
+# ConstructorInitializerAllOnOneLineOrOnePerLine: false
+# ConstructorInitializerIndentWidth: 4
+# ContinuationIndentWidth: 4
+# Cpp11BracedListStyle: true
+# DerivePointerAlignment: false
+# DisableFormat:   false
+# ExperimentalAutoDetectBinPacking: false
+# ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+# IncludeCategories:
+#   - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
+#     Priority:        2
+#   - Regex:           '^(<|"(gtest|isl|json)/)'
+#     Priority:        3
+#   - Regex:           '.*'
+#     Priority:        1
+# IndentCaseLabels: false
+# IndentWidth:     2
+# IndentWrappedFunctionNames: false
+# KeepEmptyLinesAtTheStartOfBlocks: true
+# MacroBlockBegin: ''
+# MacroBlockEnd:   ''
+# MaxEmptyLinesToKeep: 1
+# NamespaceIndentation: None
+# ObjCBlockIndentWidth: 2
+# ObjCSpaceAfterProperty: false
+# ObjCSpaceBeforeProtocolList: true
+# PenaltyBreakBeforeFirstCallParameter: 19
+# PenaltyBreakComment: 300
+# PenaltyBreakFirstLessLess: 120
+# PenaltyBreakString: 1000
+# PenaltyExcessCharacter: 1000000
+# PenaltyReturnTypeOnItsOwnLine: 60
+# PointerAlignment: Right
+# ReflowComments:  true
+# SortIncludes:    true
+# SpaceAfterCStyleCast: false
+# SpaceBeforeAssignmentOperators: true
+# SpaceBeforeParens: ControlStatements
+# SpaceInEmptyParentheses: false
+# SpacesBeforeTrailingComments: 1
+# SpacesInAngles:  false
+# SpacesInContainerLiterals: true
+# SpacesInCStyleCastParentheses: false
+# SpacesInParentheses: false
+# SpacesInSquareBrackets: false
+# Standard:        Cpp11
+# TabWidth:        8
+# UseTab:          Never
+# ...
+

CMakeLists.txt

@@ -333,6 +333,42 @@ install(EXPORT DARTTargets DESTINATION share/dart)
 configure_file("${PROJECT_SOURCE_DIR}/cmake/uninstall_target.cmake.in" "${PROJECT_BINARY_DIR}/uninstall_target.cmake" IMMEDIATE @ONLY)
 add_custom_target(uninstall "${CMAKE_COMMAND}" -P "${PROJECT_BINARY_DIR}/uninstall_target.cmake")
 
+#===============================================================================
+# Code Formatting
+#===============================================================================
+message(STATUS "")
+message(STATUS "[ Code Formatting ]")
+
+find_program(CLANG_FORMAT_EXECUTABLE NAMES clang-format clang-format-3.6)
+
+if (CLANG_FORMAT_EXECUTABLE)
+
+  message(STATUS "Looking for clang-format - found")
+
+  file(GLOB_RECURSE FORMAT_FILES
+       ${CMAKE_SOURCE_DIR}/dart/common/*.hpp
+       ${CMAKE_SOURCE_DIR}/dart/common/*.cpp)
+
+  add_custom_target(format
+                    COMMAND ${CMAKE_COMMAND} -E echo "Formatting code... "
+                    COMMAND ${CLANG_FORMAT_EXECUTABLE} -style=file -i ${FORMAT_FILES}
+                    COMMAND ${CMAKE_COMMAND} -E echo "Done."
+                    DEPENDS ${CLANG_FORMAT_EXECUTABLE}
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/dart)
+
+  add_custom_target(check-format
+                    COMMAND ${CMAKE_COMMAND} -E echo "Checking code format... "
+                    COMMAND ${CMAKE_SOURCE_DIR}/tools/check_format.sh ${CLANG_FORMAT_EXECUTABLE} ${FORMAT_FILES}
+                    COMMAND ${CMAKE_COMMAND} -E echo "Done."
+                    DEPENDS ${CLANG_FORMAT_EXECUTABLE}
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/dart)
+
+else()
+
+  message(STATUS "Looking for clang-format - NOT found, please install clang-format to enable automatic code formatting")
+
+endif()
+
 #===============================================================================
 # API Document using Doxygen
 # References:

tools/check_format.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+num_changes=`$1 -style=file -output-replacements-xml "${@:2}" | grep -c "<replacement "`
+
+if [ "$num_changes" = "0" ]; then
+  echo "Every file seems to comply with our code convention."
+  exit 0
+else
+  echo "Found" $num_changes "necessary changes."
+  exit 1
+fi