#!/usr/bin/env bash # For code formatting we have clang-format. # # But it's not sane to apply clang-format for whole code base, # because it sometimes makes worse for properly formatted files. # # It's only reasonable to blindly apply clang-format only in cases # when the code is likely to be out of style. # # For this purpose we have a script that will use very primitive heuristics # (simple regexps) to check if the code is likely to have basic style violations. # and then to run formatter only for the specified files. LC_ALL="en_US.UTF-8" ROOT_PATH="." EXCLUDE_DIRS='build/|integration/|widechar_width/|glibc-compatibility/|poco/|memcpy/|consistent-hashing|benchmark|tests/.*.cpp|utils/keeper-bench/example.yaml' # From [1]: # But since array_to_string_internal() in array.c still loops over array # elements and concatenates them into a string, it's probably not more # efficient than the looping solutions proposed, but it's more readable. # # [1]: https://stackoverflow.com/a/15394738/328260 function in_array() { local IFS="|" local value=$1 && shift [[ "${IFS}${*}${IFS}" =~ "${IFS}${value}${IFS}" ]] } find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' 2>/dev/null | grep -vP $EXCLUDE_DIRS | xargs grep $@ -P '((class|struct|namespace|enum|if|for|while|else|throw|switch).*|\)(\s*const)?(\s*override)?\s*)\{$|\s$|^ {1,3}[^\* ]\S|\t|^\s*(if|else if|if constexpr|else if constexpr|for|while|catch|switch)\(|\( [^\s\\]|\S \)' | # a curly brace not in a new line, but not for the case of C++11 init or agg. initialization | trailing whitespace | number of ws not a multiple of 4, but not in the case of comment continuation | missing whitespace after for/if/while... before opening brace | whitespaces inside braces grep -v -P '(//|:\s+\*|\$\(\()| \)"' # single-line comment | continuation of a multiline comment | a typical piece of embedded shell code | something like ending of raw string literal # Tabs find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' 2>/dev/null | grep -vP $EXCLUDE_DIRS | xargs grep $@ -F $'\t' # // namespace comments are unneeded find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' 2>/dev/null | grep -vP $EXCLUDE_DIRS | xargs grep $@ -P '}\s*//+\s*namespace\s*' # Broken symlinks find -L $ROOT_PATH -type l 2>/dev/null | grep -v contrib && echo "^ Broken symlinks found" # Duplicated or incorrect setting declarations SETTINGS_FILE=$(mktemp) cat $ROOT_PATH/src/Core/Settings.cpp $ROOT_PATH/src/Core/FormatFactorySettingsDeclaration.h | grep "M(" | awk '{print substr($2, 0, length($2) - 1) " " substr($1, 3, length($1) - 3) " SettingsDeclaration" }' > ${SETTINGS_FILE} find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | xargs grep "extern const Settings" -T | awk '{print substr($5, 0, length($5) -1) " " substr($4, 9) " " substr($1, 0, length($1) - 1)}' >> ${SETTINGS_FILE} # Duplicate extern declarations for settings awk '{if (seen[$0]++) print $3 " -> " $1 ;}' ${SETTINGS_FILE} | while read line; do echo "Found duplicated setting declaration in: $line" done # Incorrect declarations for settings for setting in $(awk '{print $1 " " $2}' ${SETTINGS_FILE} | sort | uniq | awk '{ print $1 }' | sort | uniq -d); do expected=$(grep "^$setting " ${SETTINGS_FILE} | grep SettingsDeclaration | awk '{ print $2 }') grep "^$setting " ${SETTINGS_FILE} | grep -v " $expected" | awk '{ print $3 " found setting " $1 " with type " $2 }' | while read line; do echo "In $line but it should be $expected" done done rm ${SETTINGS_FILE} # Unused/Undefined/Duplicates ErrorCodes/ProfileEvents/CurrentMetrics declare -A EXTERN_TYPES EXTERN_TYPES[ErrorCodes]=int EXTERN_TYPES[ProfileEvents]=Event EXTERN_TYPES[CurrentMetrics]=Metric EXTERN_TYPES_EXCLUDES=( ProfileEvents::global_counters ProfileEvents::Event ProfileEvents::Count ProfileEvents::Counters ProfileEvents::end ProfileEvents::increment ProfileEvents::incrementForLogMessage ProfileEvents::getName ProfileEvents::Timer ProfileEvents::Type ProfileEvents::TypeEnum ProfileEvents::dumpToMapColumn ProfileEvents::getProfileEvents ProfileEvents::ThreadIdToCountersSnapshot ProfileEvents::LOCAL_NAME ProfileEvents::keeper_profile_events ProfileEvents::CountersIncrement CurrentMetrics::add CurrentMetrics::sub CurrentMetrics::get CurrentMetrics::set CurrentMetrics::end CurrentMetrics::Increment CurrentMetrics::Metric CurrentMetrics::values CurrentMetrics::Value CurrentMetrics::keeper_metrics ErrorCodes::ErrorCode ErrorCodes::getName ErrorCodes::increment ErrorCodes::end ErrorCodes::values ErrorCodes::values[i] ErrorCodes::getErrorCodeByName ErrorCodes::Value ) for extern_type in ${!EXTERN_TYPES[@]}; do type_of_extern=${EXTERN_TYPES[$extern_type]} allowed_chars='[_A-Za-z]+' # Unused # NOTE: to fix automatically, replace echo with: # sed -i "/extern const $type_of_extern $val/d" $file find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | { # NOTE: the check is pretty dumb and distinguish only by the type_of_extern, # and this matches with zkutil::CreateMode grep -v -e 'src/Common/ZooKeeper/Types.h' -e 'src/Coordination/KeeperConstants.cpp' } | { grep -vP $EXCLUDE_DIRS | xargs grep -l -P "extern const $type_of_extern $allowed_chars" } | while read file; do grep -P "extern const $type_of_extern $allowed_chars;" $file | sed -r -e "s/^.*?extern const $type_of_extern ($allowed_chars);.*?$/\1/" | while read val; do if ! grep -q "$extern_type::$val" $file; then # Excludes for SOFTWARE_EVENT/HARDWARE_EVENT/CACHE_EVENT in ThreadProfileEvents.cpp if [[ ! $extern_type::$val =~ ProfileEvents::Perf.* ]]; then echo "$extern_type::$val is defined but not used in file $file" fi fi done done # Undefined # NOTE: to fix automatically, replace echo with: # ( grep -q -F 'namespace $extern_type' $file && \ # sed -i -r "0,/(\s*)extern const $type_of_extern [$allowed_chars]+/s//\1extern const $type_of_extern $val;\n&/" $file || \ # awk '{ print; if (ns == 1) { ns = 2 }; if (ns == 2) { ns = 0; print "namespace $extern_type\n{\n extern const $type_of_extern '$val';\n}" } }; /namespace DB/ { ns = 1; };' < $file > ${file}.tmp && mv ${file}.tmp $file ) find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | { grep -vP $EXCLUDE_DIRS | xargs grep -l -P "$extern_type::$allowed_chars" } | while read file; do grep -P "$extern_type::$allowed_chars" $file | grep -P -v '^\s*//' | sed -r -e "s/^.*?$extern_type::($allowed_chars).*?$/\1/" | while read val; do if ! grep -q "extern const $type_of_extern $val" $file; then if ! in_array "$extern_type::$val" "${EXTERN_TYPES_EXCLUDES[@]}"; then echo "$extern_type::$val is used in file $file but not defined" fi fi done done # Duplicates find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | { grep -vP $EXCLUDE_DIRS | xargs grep -l -P "$extern_type::$allowed_chars" } | while read file; do grep -P "extern const $type_of_extern $allowed_chars;" $file | sort | uniq -c | grep -v -P ' +1 ' && echo "Duplicate $extern_type in file $file" done done # Three or more consecutive empty lines find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | while read file; do awk '/^$/ { ++i; if (i > 2) { print "More than two consecutive empty lines in file '$file'" } } /./ { i = 0 }' $file; done # Check that every header file has #pragma once in first line find $ROOT_PATH/{src,programs,utils} -name '*.h' | grep -vP $EXCLUDE_DIRS | while read file; do [[ $(head -n1 $file) != '#pragma once' ]] && echo "File $file must have '#pragma once' in first line"; done # Too many exclamation marks find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -F '!!!' | grep -P '.' && echo "Too many exclamation marks (looks dirty, unconfident)." # Exclamation mark in a message find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -F '!",' | grep -P '.' && echo "No need for an exclamation mark (looks dirty, unconfident)." # Trailing whitespaces find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -n -P ' $' | grep -n -P '.' && echo "^ Trailing whitespaces." # Forbid stringstream because it's easy to use them incorrectly and hard to debug possible issues find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -P 'std::[io]?stringstream' | grep -v "STYLE_CHECK_ALLOW_STD_STRING_STREAM" && echo "Use WriteBufferFromOwnString or ReadBufferFromString instead of std::stringstream" # Forbid std::cerr/std::cout in src (fine in programs/utils) std_cerr_cout_excludes=( /examples/ /tests/ _fuzzer # OK src/Common/ProgressIndication.cpp # only under #ifdef DBMS_HASH_MAP_DEBUG_RESIZES, that is used only in tests src/Common/HashTable/HashTable.h # SensitiveDataMasker::printStats() src/Common/SensitiveDataMasker.cpp # StreamStatistics::print() src/Compression/LZ4_decompress_faster.cpp # ContextSharedPart with subsequent std::terminate() src/Interpreters/Context.cpp # IProcessor::dump() src/Processors/IProcessor.cpp src/Client/ClientApplicationBase.cpp src/Client/ClientBase.cpp src/Client/LineReader.cpp src/Client/QueryFuzzer.cpp src/Client/Suggest.cpp src/Client/ClientBase.h src/Client/LineReader.h src/Client/ReplxxLineReader.h src/Bridge/IBridge.cpp src/Daemon/BaseDaemon.cpp src/Loggers/Loggers.cpp src/Common/GWPAsan.cpp src/Common/ProgressIndication.h ) sources_with_std_cerr_cout=( $( find $ROOT_PATH/{src,base} -name '*.h' -or -name '*.cpp' | \ grep -vP $EXCLUDE_DIRS | \ grep -F -v $(printf -- "-e %s " "${std_cerr_cout_excludes[@]}") | \ xargs grep -F --with-filename -e std::cerr -e std::cout | cut -d: -f1 | sort -u ) ) # Exclude comments for src in "${sources_with_std_cerr_cout[@]}"; do # suppress stderr, since it may contain warning for #pargma once in headers if gcc -fpreprocessed -dD -E "$src" 2>/dev/null | grep -F -q -e std::cerr -e std::cout; then echo "$src: uses std::cerr/std::cout" fi done expect_tests=( $(find $ROOT_PATH/tests/queries -name '*.expect') ) for test_case in "${expect_tests[@]}"; do pattern="^exp_internal -f \$CLICKHOUSE_TMP/\$basename.debuglog 0$" grep -q "$pattern" "$test_case" || echo "Missing '$pattern' in '$test_case'" if grep -q "^spawn.*CLICKHOUSE_CLIENT_BINARY$" "$test_case"; then pattern="^spawn.*CLICKHOUSE_CLIENT_BINARY.*--history_file$" grep -q "$pattern" "$test_case" || echo "Missing '$pattern' in '$test_case'" fi # Otherwise expect_after/expect_before will not bail without stdin attached # (and actually this is a hack anyway, correct way is to use $any_spawn_id) pattern="-i \$any_spawn_id timeout" grep -q -- "$pattern" "$test_case" || echo "Missing '$pattern' in '$test_case'" pattern="-i \$any_spawn_id eof" grep -q -- "$pattern" "$test_case" || echo "Missing '$pattern' in '$test_case'" done # Forbid non-unique error codes if [[ "$(grep -Po "M\([0-9]*," $ROOT_PATH/src/Common/ErrorCodes.cpp | wc -l)" != "$(grep -Po "M\([0-9]*," $ROOT_PATH/src/Common/ErrorCodes.cpp | sort | uniq | wc -l)" ]] then echo "ErrorCodes.cpp contains non-unique error codes" fi # Check that there is no system-wide libraries/headers in use. # # NOTE: it is better to override find_path/find_library in cmake, but right now # it is not possible, see [1] for the reference. # # [1]: git grep --recurse-submodules -e find_library -e find_path contrib if git grep -e find_path -e find_library -- :**CMakeLists.txt; then echo "There is find_path/find_library usage. ClickHouse should use everything bundled. Consider adding one more contrib module." fi # Forbid std::filesystem::is_symlink and std::filesystem::read_symlink, because it's easy to use them incorrectly find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -P '::(is|read)_symlink' | grep -v "STYLE_CHECK_ALLOW_STD_FS_SYMLINK" && echo "Use DB::FS::isSymlink and DB::FS::readSymlink instead" # Forbid __builtin_unreachable(), because it's hard to debug when it becomes reachable find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -P '__builtin_unreachable' && echo "Use UNREACHABLE() from defines.h instead" # Forbid mt19937() and random_device() which are outdated and slow find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -P '(std::mt19937|std::mersenne_twister_engine|std::random_device)' && echo "Use pcg64_fast (from pcg_random.h) and randomSeed (from Common/randomSeed.h) instead" # Require checking return value of close(), # since it can hide fd misuse and break other places. find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -e ' close(.*fd' -e ' ::close(' | grep -v = && echo "Return value of close() should be checked" # A small typo can lead to debug code in release builds, see https://github.com/ClickHouse/ClickHouse/pull/47647 find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | xargs grep -l -F '#ifdef NDEBUG' | xargs -I@FILE awk '/#ifdef NDEBUG/ { inside = 1; dirty = 1 } /#endif/ { if (inside && dirty) { print "File @FILE has suspicious #ifdef NDEBUG, possibly confused with #ifndef NDEBUG" }; inside = 0 } /#else/ { dirty = 0 }' @FILE # If a user is doing dynamic or typeid cast with a pointer, and immediately dereferencing it, it is unsafe. find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | xargs grep --line-number -P '(dynamic|typeid)_cast<[^>]+\*>\([^\(\)]+\)->' | grep -P '.' && echo "It's suspicious when you are doing a dynamic_cast or typeid_cast with a pointer and immediately dereferencing it. Use references instead of pointers or check a pointer to nullptr." # Check for bad punctuation: whitespace before comma. find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | xargs grep -P --line-number '\w ,' | grep -v 'bad punctuation is ok here' && echo "^ There is bad punctuation: whitespace before comma. You should write it like this: 'Hello, world!'" # Check usage of std::regex which is too bloated and slow. find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | xargs grep -P --line-number 'std::regex' | grep -P '.' && echo "^ Please use re2 instead of std::regex" # Cyrillic characters hiding inside Latin. find $ROOT_PATH/{src,programs,utils} -name '*.h' -or -name '*.cpp' | grep -v StorageSystemContributors.generated.cpp | xargs grep -P --line-number '[a-zA-Z][а-яА-ЯёЁ]|[а-яА-ЯёЁ][a-zA-Z]' && echo "^ Cyrillic characters found in unexpected place." # Orphaned header files. join -v1 <(find $ROOT_PATH/{src,programs,utils} -name '*.h' -printf '%f\n' | sort | uniq) <(find $ROOT_PATH/{src,programs,utils} -name '*.cpp' -or -name '*.c' -or -name '*.h' -or -name '*.S' | xargs grep --no-filename -o -P '[\w-]+\.h' | sort | uniq) | grep . && echo '^ Found orphan header files.' # Don't allow dynamic compiler check with CMake, because we are using hermetic, reproducible, cross-compiled, static (TLDR, good) builds. ls -1d $ROOT_PATH/contrib/*-cmake | xargs -I@ find @ -name 'CMakeLists.txt' -or -name '*.cmake' | xargs grep --with-filename -i -P 'check_c_compiler_flag|check_cxx_compiler_flag|check_c_source_compiles|check_cxx_source_compiles|check_include_file|check_symbol_exists|cmake_push_check_state|cmake_pop_check_state|find_package|CMAKE_REQUIRED_FLAGS|CheckIncludeFile|CheckCCompilerFlag|CheckCXXCompilerFlag|CheckCSourceCompiles|CheckCXXSourceCompiles|CheckCSymbolExists|CheckCXXSymbolExists' | grep -v Rust && echo "^ It's not allowed to have dynamic compiler checks with CMake." # Wrong spelling of abbreviations, e.g. SQL is right, Sql is wrong. XMLHttpRequest is very wrong. find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -P 'Sql|Html|Xml|Cpu|Tcp|Udp|Http|Db|Json|Yaml' | grep -v -P 'RabbitMQ|Azure|Aws|aws|Avro|IO/S3' && echo "Abbreviations such as SQL, XML, HTTP, should be in all caps. For example, SQL is right, Sql is wrong. XMLHttpRequest is very wrong." find $ROOT_PATH/{src,base,programs,utils} -name '*.h' -or -name '*.cpp' | grep -vP $EXCLUDE_DIRS | xargs grep -F -i 'ErrorCodes::LOGICAL_ERROR, "Logical error:' && echo "If an exception has LOGICAL_ERROR code, there is no need to include the text 'Logical error' in the exception message, because then the phrase 'Logical error' will be printed twice." # There shouldn't be any code snippets under GPL or LGPL find $ROOT_PATH/{src,base,programs} -name '*.h' -or -name '*.cpp' 2>/dev/null | xargs grep -i -F 'General Public License' && echo "There shouldn't be any code snippets under GPL or LGPL" PATTERN="allow_"; DIFF=$(comm -3 <(grep -o "\b$PATTERN\w*\b" $ROOT_PATH/src/Core/Settings.cpp | sort -u) <(grep -o -h "\b$PATTERN\w*\b" $ROOT_PATH/src/Databases/enableAllExperimentalSettings.cpp $ROOT_PATH/utils/check-style/experimental_settings_ignore.txt | sort -u)); [ -n "$DIFF" ] && echo "$DIFF" && echo "^^ Detected 'allow_*' settings that might need to be included in src/Databases/enableAllExperimentalSettings.cpp" && echo "Alternatively, consider adding an exception to utils/check-style/experimental_settings_ignore.txt"