add clang format

.clang-format

@@ -0,0 +1,119 @@
+Language:        Cpp
+AccessModifierOffset: -2
+AlignAfterOpenBracket: BlockIndent
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Left
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: No
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterCaseLabel:  true
+  AfterClass:      true
+  AfterControlStatement: true
+  AfterEnum:       true
+  AfterExternBlock: true
+  AfterFunction:   true
+  AfterNamespace:  true
+  AfterObjCDeclaration: false
+  AfterStruct:     true
+  AfterUnion:      true
+  BeforeCatch:     true
+  BeforeElse:      true
+  IndentBraces:    false
+  SplitEmptyFunction: false
+  SplitEmptyRecord: false
+  SplitEmptyNamespace: false
+BreakBeforeBinaryOperators: All
+BreakBeforeBraces: Custom
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeComma
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: true
+ColumnLimit: 0
+CommentPragmas:  '^ IWYU pragma:'
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 2
+ContinuationIndentWidth: 2
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+IncludeCategories:
+  - Regex:           '^<Q.*'
+    Priority:        300
+  - Regex:           '^<qgs.*'
+    Priority:        200
+  - Regex:           '<.*'
+    Priority:        400
+  - Regex:           '^".*'
+    Priority:        100
+  - Regex:           '.*'
+    Priority:        1
+IncludeIsMainRegex: false
+IncludeBlocks: Regroup
+IndentAccessModifiers: true
+IndentCaseLabels: true
+IndentWidth: 2
+IndentWrappedFunctionNames: true
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+# Do not add QT_BEGIN_NAMESPACE/QT_END_NAMESPACE as this will indent lines in between.
+MacroBlockBegin: ""
+MacroBlockEnd:   ""
+MaxEmptyLinesToKeep: 2
+NamespaceIndentation: All
+ObjCBlockIndentWidth: 4
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakAssignment: 150
+PenaltyBreakBeforeFirstCallParameter: 5000
+PenaltyBreakComment: 500
+PenaltyBreakFirstLessLess: 400
+PenaltyBreakString: 600
+PenaltyExcessCharacter: 10
+PenaltyReturnTypeOnItsOwnLine: 5000
+PointerAlignment: Right
+ReflowComments:  false
+SortIncludes:    false
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: true
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: true
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInContainerLiterals: false
+SpacesInCStyleCastParentheses: true
+SpacesInParentheses: true
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        2
+UseTab:       Never
+
+---
+
+Language:        ObjC
+
+ObjCBlockIndentWidth: 4

scripts/spell_check/.agignore

@@ -23,6 +23,7 @@ tests/testdata/newsfeed/
 .agignore
 
 #Specific files
+.clang-format
 ChangeLog
 doc/NEWS.html
 debian/qgis.desktop