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# - Find clang-tidy executable
#
# Find the native clang-tidy executable
#
# This module defines
# CLANG_TIDY_EXECUTABLE, the ful lpath to clang-tidy executable
#
# CLANG_TIDY_VERSION, the full version of the clang-tidy in the
# major,minor.patch format
#
# CLANG_TIDY_VERSION_MAJOR,
# CLANG_TIDY_VERSION_MINOR,
# CLANG_TIDY_VERSION_PATCH, individual components of the clang-tidy version.
#
# CLANG_TIDY_FOUND, If false, do not try to use Eigen3.
#=============================================================================
# Copyright 2020 Blender Foundation.
#
# Distributed under the OSI-approved BSD 3-Clause License,
# see accompanying file BSD-3-Clause-license.txt for details.
#=============================================================================
# If CLANG_TIDY_ROOT_DIR was defined in the environment, use it.
if(NOT CLANG_TIDY_ROOT_DIR AND NOT $ENV{CLANG_TIDY_ROOT_DIR} STREQUAL "")
set(CLANG_TIDY_ROOT_DIR $ENV{CLANG_TIDY_ROOT_DIR})
endif()
set(_clang_tidy_SEARCH_DIRS
${CLANG_TIDY_ROOT_DIR}
/usr/local/bin
)
# TODO(sergey): Find more reliable way of finding the latest clang-tidy.
find_program(CLANG_TIDY_EXECUTABLE
NAMES
clang-tidy-10
clang-tidy-9
clang-tidy-8
clang-tidy-7
clang-tidy
HINTS
${_clang_tidy_SEARCH_DIRS}
)
if(CLANG_TIDY_EXECUTABLE AND NOT EXISTS ${CLANG_TIDY_EXECUTABLE})
message(WARNING "Cached or directly specified Clang-Tidy executable does not exist.")
set(CLANG_TIDY_FOUND FALSE)
elseif(CLANG_TIDY_EXECUTABLE)
# Mark clang-tidy as found.
set(CLANG_TIDY_FOUND TRUE)
# Setup fallback values.
set(CLANG_TIDY_VERSION_MAJOR 0)
set(CLANG_TIDY_VERSION_MINOR 0)
set(CLANG_TIDY_VERSION_PATCH 0)
# Get version from the output.
#
# NOTE: Don't use name of the executable file since that only includes a
# major version. Also, even the major version might be missing in the
# executable name.
execute_process(COMMAND ${CLANG_TIDY_EXECUTABLE} -version
OUTPUT_VARIABLE CLANG_TIDY_VERSION_RAW
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
# Parse parts.
if(CLANG_TIDY_VERSION_RAW MATCHES "LLVM version .*")
# Strip the LLVM prefix and get list of individual version components.
string(REGEX REPLACE
".*LLVM version ([.0-9]+).*" "\\1"
CLANG_SEMANTIC_VERSION "${CLANG_TIDY_VERSION_RAW}")
string(REPLACE "." ";" CLANG_VERSION_PARTS "${CLANG_SEMANTIC_VERSION}")
list(LENGTH CLANG_VERSION_PARTS NUM_CLANG_TIDY_VERSION_PARTS)
# Extract components into corresponding variables.
if(NUM_CLANG_TIDY_VERSION_PARTS GREATER 0)
list(GET CLANG_VERSION_PARTS 0 CLANG_TIDY_VERSION_MAJOR)
endif()
if(NUM_CLANG_TIDY_VERSION_PARTS GREATER 1)
list(GET CLANG_VERSION_PARTS 1 CLANG_TIDY_VERSION_MINOR)
endif()
if(NUM_CLANG_TIDY_VERSION_PARTS GREATER 2)
list(GET CLANG_VERSION_PARTS 2 CLANG_TIDY_VERSION_PATCH)
endif()
# Unset temp variables.
unset(NUM_CLANG_TIDY_VERSION_PARTS)
unset(CLANG_SEMANTIC_VERSION)
unset(CLANG_VERSION_PARTS)
endif()
# Construct full semantic version.
set(CLANG_TIDY_VERSION "${CLANG_TIDY_VERSION_MAJOR}.\
${CLANG_TIDY_VERSION_MINOR}.\
${CLANG_TIDY_VERSION_PATCH}")
unset(CLANG_TIDY_VERSION_RAW)
message(STATUS "Found clang-tidy ${CLANG_TIDY_EXECUTABLE} (${CLANG_TIDY_VERSION})")
else()
set(CLANG_TIDY_FOUND FALSE)
endif()
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