tools: Automatic code format tool added

Tool allows auto formatting of code according to Google coding standard
for easier control and fixing formatting issues.

code_format

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+code_formatter.sh

tools/codestyle/README

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+    [Tools] Added scripts for code style validation and auto fixing
+
+    These tools are based on:
+    https://review.tizen.org/gerrit/gitweb?p=platform/core/api/webapi-plugins.git;a=tree;f=tools/codestyle;h=8a8bd7adfcfe7ed144e8937fda00ae4e3793c33a;hb=refs/heads/tizen
+
+    [Features]
+      - tools/codestyle/code_formatter.sh - formatter for C/C++ (changes files)
+      - tools/codestyle/c++_clang_formatter.sh - for auto formating C++ files
+      - tools/codestyle/cpplint_tizen_160919.py and tools/codestyle/cpplint_tizen_dir.sh
+        scripts for C++ code style validation, provided by HQ
+      - code_format - link to script for easier access
+
+    [Help] You can check usage for code_format using '-h' option

tools/codestyle/c++_clang_formatter.sh

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+#!/bin/bash
+
+SOURCE="${BASH_SOURCE[0]}"
+while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
+  SOURCE="$(readlink "$SOURCE")"
+  [[ $SOURCE != /* ]] && SOURCE="$SCRIPT_DIR/$SOURCE"
+  # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
+
+# https://clangformat.com/
+if [ ! "$(command -v clang-format)" ]; then
+    echo >&2 "clang-format is required, but it's not installed";
+    echo "-------------------------------------------------------------------------------------";
+    echo "To install clang-format on Debian/Ubuntu, execute the following commands."
+    echo " sudo apt-get install clang-format-3.9"
+    echo " sudo ln -s /usr/bin/clang-format-3.9 /usr/bin/clang-format"
+    echo "-------------------------------------------------------------------------------------";
+    exit 1;
+fi
+
+config='{
+BasedOnStyle: Google,
+Language: Cpp,
+Standard: Cpp11,
+UseTab: Never,
+IndentWidth: 2,
+ColumnLimit: 100,
+PointerBindsToType: true,
+AllowShortFunctionsOnASingleLine: false,
+BreakBeforeBraces: GNU,
+}'
+
+formatC++() {
+  printf "."
+  find -- "$1" -type f \( -name '*.cc' -o -name '*.cpp' -o -name '*.h' -o -name '*.hpp' \) | \
+    grep -v 'src/google' | xargs -n1 --no-run-if-empty clang-format -i -style="$config"
+}
+
+checkUpdatedFiles() {
+  while IFS= read -r -d '' f; do
+  if [ "${f: -3}" == ".cc" ] || [ "${f: -4}" == ".cpp" ] || [ "${f: -2}" == ".h" ] || \
+    [ "${f: -4}" == ".hpp" ]; then
+    printf '.'
+    clang-format -i -style="$config" "$f";
+  fi
+  done < <(git diff-index -z --name-only --diff-filter=AM HEAD --)
+}
+
+printf "C/C++ reformatting: ";
+if [[ $# -eq 0 ]]; then
+  formatC++ "$SCRIPT_DIR/../../src/"
+elif [[ "$1" == "-u"  ]]; then
+  checkUpdatedFiles
+else
+  formatC++ "$1"
+fi
+printf " DONE C/C++ reformatting\n"

tools/codestyle/code_formatter.sh

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+#!/bin/bash
+
+SOURCE="${BASH_SOURCE[0]}"
+while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
+  SOURCE="$(readlink "$SOURCE")"
+  [[ $SOURCE != /* ]] && SOURCE="$SCRIPT_DIR/$SOURCE"
+  # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
+echo "$SCRIPT_DIR"
+
+dir2analyze="$SCRIPT_DIR/../../src"
+analyzeC="false";
+files_to_update="";
+
+printHelp() {
+  echo "Script for automatic fixing some coding style rules issues."
+  echo "In case of any issues of analysed code, the script would adjust it to follow"
+  echo "coding style. THIS COULD CHANGE YOUR FILES. Please commit your changes locally"
+  echo "if you want to have meaningful changes divided from style-only changes"
+  echo "Using it without specifying a path would analyse \"src\" from current directory."
+  printf -- "\nUsage: %s [directory] [options ...]\n" "$(basename "$0")"
+  printf -- "Options:\n"
+  printf -- "-u\t\tcheck all C/C++ files that has been modified since last commit and fix issues\n"
+  printf -- "-c\t\tcheck C/C++ files and fix issues\n"
+  printf -- "-a [--all]\tcheck all C/C++ files and fix issues\n"
+  printf -- "-h [--help]\tshow this help\n"
+  echo "When using any of 'u' options, all not commited files will be backed up."
+}
+
+formatC++() {
+  path="$(readlink -f "$1")"
+  if [[ "$analyzeC" == "true" ]]; then
+    echo "Reformatting C++ sources recursively for directory $path";
+    "$SCRIPT_DIR/c++_clang_formatter.sh" "$path";
+  else
+    echo "no C++ sources reformatting - please use '-c' option to enable it";
+  fi
+}
+
+backupUpdatedFiles() {
+  files_to_update="$(git diff-index -z --name-only --diff-filter=AM HEAD --)";
+  if [[ "$files_to_update" == "" ]]; then
+    echo "There are no updated files to format";
+    exit;
+  fi
+  time_stamp=$(date +%Y-%m-%d-%T);
+  dir_name="backup_${time_stamp}";
+  echo "Creating backup of not commited changes in directory: $dir_name";
+  mkdir -p "${dir_name}";
+  while IFS= read -r -d '' file; do
+    cp -- "$file" "$dir_name";
+  done <<< "$files_to_update"
+}
+
+formatUpdatedC++() {
+  if [[ "$files_to_update" == "" ]]; then
+    exit
+  fi
+  echo "Reformatting C++ sources from list:";
+  git diff-index --name-only --diff-filter=AM HEAD --;
+  "$SCRIPT_DIR/c++_clang_formatter.sh" -u;
+}
+
+for arg in "$@";
+do
+  if [[ "$arg" == "-u" ]]; then
+    backupUpdatedFiles
+    formatUpdatedC++
+    exit
+  elif [[ "$arg" == "-c" ]]; then
+    analyzeC="true";
+  elif [[ "$arg" == "--all" ]] || [[ "$arg" == "-a" ]]; then
+    analyzeC="true";
+  elif [[ "$arg" == "--help" ]] || [[ "$arg" == "-h" ]]; then
+    printHelp
+    exit
+  else
+    if [[ -d "$arg" ]]; then
+      dir2analyze="$arg";
+    else
+      (>&2 printf "ERROR: directory %s does not exist\n\n" "$arg")
+      printHelp
+      exit 1
+    fi
+  fi
+done
+
+formatC++ "$dir2analyze"

tools/codestyle/cpplint_tizen_dir.sh

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+#!/bin/bash
+
+SOURCE="${BASH_SOURCE[0]}"
+while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
+  SOURCE="$(readlink "$SOURCE")"
+  [[ $SOURCE != /* ]] && SOURCE="$SCRIPT_DIR/$SOURCE"
+  # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
+
+patch_cpp="$SCRIPT_DIR/cpplint_tizen_160919.py"
+
+# check rule to cpp
+find -- "$1" \( -name "*.cpp" -o name "*.cc" \) -exec python "$patch_cpp" {} \;
+find -- "$1" -name "*.h" -exec python "$patch_cpp" {} \;