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LINT: add clang-tidy step (#6295)

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* Implement new travis clang-tidy build step

* This step enable some rules and enforce one rule as error
* This permits to have some C++ quality rules based on clang & clang contributor guidelines

* Fix clang-tidy reported problems on push_back -> emplace_back
This commit is contained in:
Loïc Blot 2018-04-01 23:57:55 +02:00 committed by GitHub
parent 93eb0794d6
commit d88c4e1822
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 319 additions and 8 deletions
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4
.clang-tidy Normal file
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@ -0,0 +1,4 @@
Checks: '-*,modernize-use-emplace,modernize-use-default-member-init,modernize-use-equals-delete,modernize-use-equals-default,modernize-return-braced-init-list,modernize-loop-convert,modernize-avoid-bind,misc-throw-by-value-catch-by-reference,misc-string-compare,misc-inefficient-algorithm,misc-inaccurate-erase,misc-incorrect-roundings,misc-unconventional-assign-operator,bugprone-suspicious-memset-usage,performance-*'
CheckOptions:
- key: modernize-use-default-member-init.UseAssignment
value: True

9
.travis.yml
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@ -96,6 +96,15 @@ matrix:
packages: ['clang-format-5.0']
sources: &sources
- llvm-toolchain-trusty-5.0
- env: CLANG_TIDY=1
compiler: clang
os: linux
script: ./util/travis/clangtidy.sh
addons:
apt:
packages: ['clang-tidy-5.0']
sources: &sources
- llvm-toolchain-trusty-5.0

2
src/gui/guiEditBoxWithScrollbar.cpp
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@ -743,7 +743,7 @@ void GUIEditBoxWithScrollBar::draw()
if (m_passwordbox) {
if (m_broken_text.size() != 1) {
m_broken_text.clear();
m_broken_text.push_back(core::stringw());
m_broken_text.emplace_back();
}
if (m_broken_text[0].size() != Text.size()){
m_broken_text[0] = Text;

8
src/script/cpp_api/s_env.cpp
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@ -116,12 +116,12 @@ void ScriptApiEnv::initializeEnvironment(ServerEnvironment *env)
while (lua_next(L, table)) {
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
trigger_contents.push_back(lua_tostring(L, -1));
trigger_contents.emplace_back(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if (lua_isstring(L, -1)) {
trigger_contents.push_back(lua_tostring(L, -1));
trigger_contents.emplace_back(lua_tostring(L, -1));
}
lua_pop(L, 1);
@ -133,12 +133,12 @@ void ScriptApiEnv::initializeEnvironment(ServerEnvironment *env)
while (lua_next(L, table)) {
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
required_neighbors.push_back(lua_tostring(L, -1));
required_neighbors.emplace_back(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if (lua_isstring(L, -1)) {
required_neighbors.push_back(lua_tostring(L, -1));
required_neighbors.emplace_back(lua_tostring(L, -1));
}
lua_pop(L, 1);

4
util/travis/before_install.sh
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@ -10,8 +10,8 @@ fi
needs_compile || exit 0
if [[ $PLATFORM == "Unix" ]]; then
if [[ $TRAVIS_OS_NAME == "linux" ]]; then
if [[ $PLATFORM == "Unix" ]] || [[ $CLANG_TIDY == "1" ]]; then
if [[ $TRAVIS_OS_NAME == "linux" ]] || [[ $CLANG_TIDY == "1" ]]; then
install_linux_deps
else
install_macosx_deps

27
util/travis/clangtidy.sh Executable file
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@ -0,0 +1,27 @@
if hash clang-tidy-5.0 2>/dev/null; then
CLANG_TIDY=clang-tidy-5.0
else
CLANG_TIDY=clang-tidy
fi
files_to_analyze="$(find src/ -name '*.cpp' -or -name '*.h')"
mkdir -p cmakebuild && cd cmakebuild
cmake -DCMAKE_BUILD_TYPE=Debug \
-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
-DRUN_IN_PLACE=TRUE \
-DENABLE_GETTEXT=TRUE \
-DENABLE_SOUND=FALSE \
-DBUILD_SERVER=TRUE ..
make GenerateVersion
cd ..
echo "Performing clang-tidy checks..."
./util/travis/run-clang-tidy.py -clang-tidy-binary=${CLANG_TIDY} -p cmakebuild \
-checks='-*,modernize-use-emplace,modernize-avoid-bind,performance-*' \
-warningsaserrors='-*,modernize-use-emplace' \
-no-command-on-stdout -quiet \
files 'src/.*'
RET=$?
echo "Clang tidy returned $RET"
exit $RET

271
util/travis/run-clang-tidy.py Executable file
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@ -0,0 +1,271 @@
#!/usr/bin/env python2
#
# ===- run-clang-tidy.py - Parallel clang-tidy runner ---------*- python -*--===#
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
# ===------------------------------------------------------------------------===#
# FIXME: Integrate with clang-tidy-diff.py
"""
Parallel clang-tidy runner
==========================
Runs clang-tidy over all files in a compilation database. Requires clang-tidy
and clang-apply-replacements in $PATH.
Example invocations.
- Run clang-tidy on all files in the current working directory with a default
set of checks and show warnings in the cpp files and all project headers.
run-clang-tidy.py $PWD
- Fix all header guards.
run-clang-tidy.py -fix -checks=-*,llvm-header-guard
- Fix all header guards included from clang-tidy and header guards
for clang-tidy headers.
run-clang-tidy.py -fix -checks=-*,llvm-header-guard extra/clang-tidy \
-header-filter=extra/clang-tidy
Compilation database setup:
http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
"""
from __future__ import print_function
import argparse
import json
import multiprocessing
import os
import Queue
import re
import shutil
import subprocess
import sys
import tempfile
import threading
import traceback
class TidyQueue(Queue.Queue):
def __init__(self, max_task):
Queue.Queue.__init__(self, max_task)
self.has_error = False
def find_compilation_database(path):
"""Adjusts the directory until a compilation database is found."""
result = './'
while not os.path.isfile(os.path.join(result, path)):
if os.path.realpath(result) == '/':
print('Error: could not find compilation database.')
sys.exit(1)
result += '../'
return os.path.realpath(result)
def get_tidy_invocation(f, clang_tidy_binary, checks, warningsaserrors,
tmpdir, build_path,
header_filter, extra_arg, extra_arg_before, quiet):
"""Gets a command line for clang-tidy."""
start = [clang_tidy_binary]
if header_filter is not None:
start.append('-header-filter=' + header_filter)
else:
# Show warnings in all in-project headers by default.
start.append('-header-filter=^' + build_path + '/.*')
if checks:
start.append('-checks=' + checks)
if warningsaserrors:
start.append('-warnings-as-errors=' + warningsaserrors)
if tmpdir is not None:
start.append('-export-fixes')
# Get a temporary file. We immediately close the handle so clang-tidy can
# overwrite it.
(handle, name) = tempfile.mkstemp(suffix='.yaml', dir=tmpdir)
os.close(handle)
start.append(name)
for arg in extra_arg:
start.append('-extra-arg=%s' % arg)
for arg in extra_arg_before:
start.append('-extra-arg-before=%s' % arg)
start.append('-p=' + build_path)
if quiet:
start.append('-quiet')
start.append(f)
return start
def check_clang_apply_replacements_binary(args):
"""Checks if invoking supplied clang-apply-replacements binary works."""
try:
subprocess.check_call([args.clang_apply_replacements_binary, '--version'])
except:
print('Unable to run clang-apply-replacements. Is clang-apply-replacements '
'binary correctly specified?', file=sys.stderr)
traceback.print_exc()
sys.exit(1)
def apply_fixes(args, tmpdir):
"""Calls clang-apply-fixes on a given directory. Deletes the dir when done."""
invocation = [args.clang_apply_replacements_binary]
if args.format:
invocation.append('-format')
if args.style:
invocation.append('-style=' + args.style)
invocation.append(tmpdir)
subprocess.call(invocation)
def run_tidy(args, tmpdir, build_path, queue):
"""Takes filenames out of queue and runs clang-tidy on them."""
while True:
name = queue.get()
invocation = get_tidy_invocation(name, args.clang_tidy_binary, args.checks,
args.warningsaserrors, tmpdir, build_path,
args.header_filter, args.extra_arg,
args.extra_arg_before, args.quiet)
if not args.no_command_on_stdout:
sys.stdout.write(' '.join(invocation) + '\n')
try:
subprocess.check_call(invocation)
except subprocess.CalledProcessError:
queue.has_error = True
queue.task_done()
def main():
parser = argparse.ArgumentParser(description='Runs clang-tidy over all files '
'in a compilation database. Requires '
'clang-tidy and clang-apply-replacements in '
'$PATH.')
parser.add_argument('-clang-tidy-binary', metavar='PATH',
default='clang-tidy',
help='path to clang-tidy binary')
parser.add_argument('-clang-apply-replacements-binary', metavar='PATH',
default='clang-apply-replacements',
help='path to clang-apply-replacements binary')
parser.add_argument('-checks', default=None,
help='checks filter, when not specified, use clang-tidy '
'default')
parser.add_argument('-warningsaserrors', default=None,
help='warnings-as-errors filter, when not specified, '
'use clang-tidy default')
parser.add_argument('-header-filter', default=None,
help='regular expression matching the names of the '
'headers to output diagnostics from. Diagnostics from '
'the main file of each translation unit are always '
'displayed.')
parser.add_argument('-j', type=int, default=0,
help='number of tidy instances to be run in parallel.')
parser.add_argument('files', nargs='*', default=['.*'],
help='files to be processed (regex on path)')
parser.add_argument('-fix', action='store_true', help='apply fix-its')
parser.add_argument('-format', action='store_true', help='Reformat code '
'after applying fixes')
parser.add_argument('-style', default='file', help='The style of reformat '
'code after applying fixes')
parser.add_argument('-p', dest='build_path',
help='Path used to read a compile command database.')
parser.add_argument('-extra-arg', dest='extra_arg',
action='append', default=[],
help='Additional argument to append to the compiler '
'command line.')
parser.add_argument('-extra-arg-before', dest='extra_arg_before',
action='append', default=[],
help='Additional argument to prepend to the compiler '
'command line.')
parser.add_argument('-quiet', action='store_true',
help='Run clang-tidy in quiet mode')
parser.add_argument('-no-command-on-stdout', action='store_true',
help='Run clang-tidy without printing invocation on '
'stdout')
args = parser.parse_args()
db_path = 'compile_commands.json'
if args.build_path is not None:
build_path = args.build_path
else:
# Find our database
build_path = find_compilation_database(db_path)
try:
invocation = [args.clang_tidy_binary, '-list-checks', '-p=' + build_path]
if args.checks:
invocation.append('-checks=' + args.checks)
if args.warningsaserrors:
invocation.append('-warnings-as-errors=' + args.warningsaserrors)
invocation.append('-')
print(subprocess.check_output(invocation))
except:
print("Unable to run clang-tidy.", file=sys.stderr)
sys.exit(1)
# Load the database and extract all files.
database = json.load(open(os.path.join(build_path, db_path)))
files = [entry['file'] for entry in database]
max_task = args.j
if max_task == 0:
max_task = multiprocessing.cpu_count()
tmpdir = None
if args.fix:
check_clang_apply_replacements_binary(args)
tmpdir = tempfile.mkdtemp()
# Build up a big regexy filter from all command line arguments.
file_name_re = re.compile('|'.join(args.files))
try:
# Spin up a bunch of tidy-launching threads.
queue = TidyQueue(max_task)
for _ in range(max_task):
t = threading.Thread(target=run_tidy,
args=(args, tmpdir, build_path, queue))
t.daemon = True
t.start()
# Fill the queue with files.
for name in files:
if file_name_re.search(name):
queue.put(name)
# Wait for all threads to be done.
queue.join()
# If one clang-tidy process found and error, exit with non-zero
# status
if queue.has_error:
sys.exit(2)
except KeyboardInterrupt:
# This is a sad hack. Unfortunately subprocess goes
# bonkers with ctrl-c and we start forking merrily.
print('\nCtrl-C detected, goodbye.')
if args.fix:
shutil.rmtree(tmpdir)
os.kill(0, 9)
if args.fix:
print('Applying fixes ...')
successfully_applied = False
try:
apply_fixes(args, tmpdir)
successfully_applied = True
except:
print('Error applying fixes.\n', file=sys.stderr)
traceback.print_exc()
shutil.rmtree(tmpdir)
if not successfully_applied:
sys.exit(1)
if __name__ == '__main__':
main()

2
util/travis/script.sh
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@ -5,7 +5,7 @@
needs_compile || exit 0
if [[ "$LINT" == "1" ]]; then
# Lint with exit CI
# Lint and exit CI
perform_lint
exit 0
fi