Clang-tidy integrated into CMakeLists.txt

Can be called from the source directory with:
utils/health/clang-tidy-run.sh

CMakeLists.txt

@@ -77,6 +77,20 @@ if (${CMAKE_VERSION} VERSION_GREATER "3.0.0")
   endif ()
 endif ()
   
+option (USE_CLANG_TIDY_C   "Lint the code with clang-tidy - variant C"   OFF)
+option (USE_CLANG_TIDY_CXX "Lint the code with clang-tidy - variant C++" OFF)
+if (USE_CLANG_TIDY_C AND USE_CLANG_TIDY_CXX)
+	message(FATAL_ERROR "Enabling both USE_CLANG_TIDY_C and USE_CLANG_TIDY_CXX simultaneously crashes clang-tidy.")
+endif()
+if (USE_CLANG_TIDY_C OR USE_CLANG_TIDY_CXX)
+	include(SetClangTidy)
+endif()
+if (USE_CLANG_TIDY_C)
+	monero_clang_tidy("C")
+elseif (USE_CLANG_TIDY_CXX)
+	monero_clang_tidy("CXX")
+endif()
+
 enable_language(C ASM)
 
 function (die msg)

cmake/SetClangTidy.cmake

@@ -0,0 +1,72 @@
+# Copyright (c) 2014-2020, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_CLANG_TIDY.html
+# This module sets the following variables:
+# CMAKE_C_CLANG_TIDY
+# CMAKE_CXX_CLANG_TIDY
+# when clang-tidy is found in PATH. Afterwards, the code is being linted by the tool.
+# The checks to be enabled can be manipulated with the variable MONERO_CLANG_TIDY_CHECKS
+
+macro (monero_clang_tidy LANGUAGE)
+	set(TOOL_NAME "clang-tidy")
+	set(MONERO_CLANG_TIDY_MIN_VERSION "3.6")
+	if(${CMAKE_VERSION} VERSION_LESS "${MONERO_CLANG_TIDY_MIN_VERSION}")
+		message(FATAL_ERROR "Sorry, ${TOOL_NAME} is available for CMake from version ${MONERO_CLANG_TIDY_MIN_VERSION}")
+	else()
+		message(STATUS "Trying to enable ${TOOL_NAME}")
+		find_program(MONERO_CLANG_BIN ${TOOL_NAME})
+		if(NOT MONERO_CLANG_BIN)
+			message(FATAL_ERROR "${TOOL_NAME} not found! Try running: sudo apt install ${TOOL_NAME}")
+		else()
+			message(STATUS "Found ${MONERO_CLANG_BIN}")
+			set(MONERO_CLANG_TIDY_CHECKS
+			    -header-filter=.; 	# By default the headers are excluded. This line enables them.
+			    -checks=*; 		# Currently enabling all checks
+			    # An example of selectively enabling checks:
+			    #-checks=bugprone-*,cppcoreguidelines-avoid-goto # Have to be in one line :(
+			)
+			# Current list of checks is avaibale under:
+			# https://clang.llvm.org/extra/clang-tidy/
+			if (${LANGUAGE} STREQUAL "C")
+				set(CMAKE_C_CLANG_TIDY
+					${MONERO_CLANG_BIN}; # Mind the semicolon
+					${MONERO_CLANG_TIDY_CHECKS}
+				)
+			elseif (${LANGUAGE} STREQUAL "CXX")
+				set(CMAKE_CXX_CLANG_TIDY
+					${MONERO_CLANG_BIN}; # Mind the semicolon
+					${MONERO_CLANG_TIDY_CHECKS}
+				)
+			else()
+				message(FATAL_ERROR "${TOOL_NAME}: Unsupported language: ${LANGUAGE}")
+			endif()
+		endif()
+	endif()
+endmacro()
+

utils/health/clang-tidy-run.sh

@@ -0,0 +1,65 @@
+#!/bin/bash -e
+
+# Copyright (c) 2014-2020, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# clang-tidy runs lint checks on C & C++ sources and headers.
+# Run this script from the source directory.
+
+DIR_BUILD_BASE="build/clang-tidy"
+RESULT_BASE="clang-tidy-result"
+
+function tidy_for_language() {
+	LANG="${1}"
+	DIR_BUILD="${DIR_BUILD_BASE}-${LANG}"
+	RESULT="${RESULT_BASE}-${LANG}.txt"
+
+	mkdir -p "$DIR_BUILD" && pushd "$DIR_BUILD"
+
+	cmake ../.. \
+	-DCMAKE_C_COMPILER=clang \
+	-DCMAKE_CXX_COMPILER=clang++ \
+	-DUSE_CCACHE=ON \
+	-DUSE_CLANG_TIDY_${LANG}=ON \
+	-DBUILD_SHARED_LIBS=ON \
+	-DBUILD_TESTS=ON
+
+	make clean 					# Clean up, so that the result can be regenerated from scratch
+	time make -k 2>&1 | tee "$RESULT"		# Build and store the result. -k means: ignore errors
+	#time make -k easylogging 2>&1 | tee "$RESULT"	# Quick testing: build a single target
+	gzip -f "$RESULT" # Zip the result, because it's huge. -f overwrites the previously generated result
+
+	echo ""
+	echo "Readable result stored in: $DIR_BUILD/$RESULT.gz"
+
+	popd
+}
+
+tidy_for_language "C"
+tidy_for_language "CXX"
+