Add the clang-tidy is a clang-based C++ “linter” tool.

Author: Vitalii Arteev

tests/clang_tidy/read.me

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+# clang-tidy is a clang-based C++ “linter” tool.
+
+# source code: https://llvm.org/docs/GettingStarted.html#checkout
+# docs: http://clang.llvm.org/extra/clang-tidy/
+# install clang-tidy, clang-tools using apt-get:
+  $ sudo apt install clang-tidy clang-tools
+
+# How to use
+ Create a build folder and jump into it:
+  $ mkdir build && cd "$_"
+ Run the script:
+  $ facelift/tests/clang_tidy/test_clang_tidy.sh
+ Results of analysis will be available in the folder
+  $ clang_tidy/report_yy-mm-dd-hhmmss/report

tests/clang_tidy/test_clang_tidy.sh

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+#!/bin/bash
+set -eu
+# for info see 'read.me'
+
+DIR_BUILD=$PWD
+DIR_SRC=$(cd $(dirname "$0")/../..; pwd -P)
+DIR_REPORT="$DIR_BUILD/clang-tidy/report_$(date +"%y-%m-%d-%H%M%S")"
+REPORT_ANALYZER="$DIR_REPORT/report"
+# Use -checks=* to see all available checks. See more settings: https://clang.llvm.org/extra/clang-tidy/
+CLANG_TIDY_FLAGS="clang-tidy;-extra-arg=-std=c++14;-header-filter=. -p=${DIR_BUILD};-checks=*;-enable-check-profile"
+
+# Build facelift with flags
+mkdir -p $DIR_REPORT
+cmake -DCMAKE_CXX_CLANG_TIDY=${CLANG_TIDY_FLAGS} -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DFACELIFT_BUILD_TESTS=ON ${DIR_SRC} && cmake --build ${DIR_BUILD} 2>$REPORT_ANALYZER
+# Show reports
+echo "clang-tidy report generated: "$REPORT_ANALYZER