Add clang-format config (moved from cpp_style repo)

Author: asherikov

.clang-format

@@ -0,0 +1,56 @@
+{
+    "AccessModifierOffset": -4,
+    "AlignAfterOpenBracket": "AlwaysBreak",
+    "AlignEscapedNewlinesLeft": false,
+    "AlignTrailingComments": true,
+    "AllowAllParametersOfDeclarationOnNextLine": false,
+    "AllowShortFunctionsOnASingleLine": "None",
+    "AllowShortIfStatementsOnASingleLine": false,
+    "AllowShortLoopsOnASingleLine": false,
+    "AlwaysBreakBeforeMultilineStrings": false,
+    "AlwaysBreakTemplateDeclarations": true,
+    "BasedOnStyle": "Google",
+    "BinPackArguments": false,
+    "BinPackParameters": false,
+    "BreakBeforeBinaryOperators": "NonAssignment",
+    "BreakBeforeBraces": "Allman",
+    "BreakBeforeTernaryOperators": false,
+    "BreakConstructorInitializersBeforeComma": true,
+    "BreakStringLiterals": false,
+    "ColumnLimit": 120,
+    "ConstructorInitializerAllOnOneLineOrOnePerLine": true,
+    "ConstructorInitializerIndentWidth": 2,
+    "ContinuationIndentWidth": 8,
+    "Cpp11BracedListStyle": false,
+    "DerivePointerAlignment": false,
+    "DerivePointerBinding": true,
+    "ExperimentalAutoDetectBinPacking": false,
+    "FixNamespaceComments": true,
+    "IndentCaseLabels": true,
+    "IndentFunctionDeclarationAfterType": false,
+    "IndentPPDirectives": "AfterHash",
+    "IndentWidth": 4,
+    "IndentWrappedFunctionNames": true,
+    "MaxEmptyLinesToKeep": 3,
+    "NamespaceIndentation": "All",
+    "ObjCSpaceBeforeProtocolList": true,
+    "PenaltyBreakBeforeFirstCallParameter": 19,
+    "PenaltyBreakComment": 60,
+    "PenaltyBreakFirstLessLess": 1000,
+    "PenaltyBreakString": 1,
+    "PenaltyExcessCharacter": 500,
+    "PenaltyReturnTypeOnItsOwnLine": 1000,
+    "PointerAlignment": "Right",
+    "PointerBindsToType": false,
+    "SortIncludes": false,
+    "SpaceAfterControlStatementKeyword": true,
+    "SpaceBeforeAssignmentOperators": true,
+    "SpaceInEmptyParentheses": false,
+    "SpacesBeforeTrailingComments": 2,
+    "SpacesInAngles": false,
+    "SpacesInCStyleCastParentheses": false,
+    "SpacesInParentheses": false,
+    "Standard": "c++17",
+    "TabWidth": 4,
+    "UseTab": "Never",
+}

pre-commit.clang-format

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# Allows us to read user input below, assigns stdin to keyboard
+exec < /dev/tty
+
+while true; 
+do
+    read -p "[pre-commit hook] Format the code? (Y/n) " yn
+    if [ "$yn" = "" ]; then
+        yn='Y'
+    fi
+    case $yn in
+        [Yy] )  cd `git rev-parse --show-toplevel`;
+                FILES=`git status -s | grep "^\(\( *M *\)\|\( *A *\)\).*\(\(cpp\)\|\(h\)$\)" | cut -f 3 -d ' '`
+                for FILE in ${FILES}
+                do
+                    echo "Formatting: ${FILE}"
+                    clang-format-4.0 -style=file -i ${FILE} 
+                    git add ${FILE}
+                done
+                break;;
+        [Nn] ) exit;;
+        * ) echo "Please answer y or n for yes or no.";;
+    esac
+done