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#!/usr/bin/env python
# vim:fileencoding=utf-8
# License: Apache 2.0 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
from __future__ import (absolute_import, division, print_function, unicode_literals)
import argparse
import errno
import glob
import os
import re
import shlex
import shutil
import subprocess
import sys
import sysconfig
from collections import namedtuple
from copy import deepcopy
from itertools import chain
self_path = os.path.abspath(__file__)
base = os.path.dirname(self_path)
build_dir = os.path.join(base, 'build', 'custom')
freeze_dir = os.path.join(base, 'build', 'html5_parser')
_plat = sys.platform.lower()
isosx = 'darwin' in _plat
iswindows = hasattr(sys, 'getwindowsversion')
is_travis = os.environ.get('TRAVIS') == 'true'
Env = namedtuple('Env', 'cc cflags ldflags linker debug cc_name cc_ver')
PKGCONFIG = os.environ.get('PKGCONFIG_EXE', 'pkg-config')
with open(os.path.join(base, 'src/python-wrapper.c'), 'rb') as f:
raw = f.read().decode('utf-8')
version = tuple(
map(
int, (
re.search(r'^#define MAJOR (\d+)', raw, flags=re.MULTILINE).group(1), re.search(
r'^#define MINOR (\d+)', raw, flags=re.MULTILINE).group(1), re.search(
r'^#define PATCH (\d+)', raw, flags=re.MULTILINE).group(1), )))
def safe_makedirs(path):
try:
os.makedirs(path)
except EnvironmentError as err:
if err.errno != errno.EEXIST:
raise
def add_python_flags(env, return_libs=False):
env.cflags.extend('-I' + sysconfig.get_path(x) for x in 'include platinclude'.split())
libs = []
libs += sysconfig.get_config_var('LIBS').split()
libs += sysconfig.get_config_var('SYSLIBS').split()
fw = sysconfig.get_config_var('PYTHONFRAMEWORK')
if fw:
for var in 'data include stdlib'.split():
val = sysconfig.get_path(var)
if val and '/{}.framework'.format(fw) in val:
fdir = val[:val.index('/{}.framework'.format(fw))]
if os.path.isdir(os.path.join(fdir, '{}.framework'.format(fw))):
framework_dir = fdir
break
else:
raise SystemExit('Failed to find Python framework')
libs.append(os.path.join(framework_dir, sysconfig.get_config_var('LDLIBRARY')))
else:
libs += ['-L' + sysconfig.get_config_var('LIBDIR')]
libs += ['-lpython' + sysconfig.get_config_var('VERSION') + getattr(sys, 'abiflags', '')]
libs += sysconfig.get_config_var('LINKFORSHARED').split()
env.ldflags.extend(libs)
return libs if return_libs else env
def pkg_config(pkg, *args):
val = subprocess.check_output([PKGCONFIG, pkg] + list(args)).decode('utf-8')
return list(filter(None, map(str, shlex.split(val))))
def env_var(which, default='', split=os.pathsep):
val = str(os.environ.get(which, default))
if not split:
return val
return list(filter(None, val.split(split)))
def include_dirs():
if 'LIBXML_INCLUDE_DIRS' in os.environ:
return env_var('LIBXML_INCLUDE_DIRS')
return [x[2:] for x in pkg_config('libxml-2.0', '--cflags-only-I')]
def libraries():
if iswindows:
return env_var('LIBXML_LIBS', 'libxml2')
if 'LIBXML_LIBS' in os.environ:
return env_var('LIBXML_LIBS')
return [x[2:] for x in pkg_config('libxml-2.0', '--libs-only-l')]
def library_dirs():
if 'LIBXML_LIB_DIRS' in os.environ:
return env_var('LIBXML_LIB_DIRS')
return [x[2:] for x in pkg_config('libxml-2.0', '--libs-only-L')]
def cc_version():
cc = os.environ.get('CC', 'gcc')
raw = subprocess.check_output([cc, '-dM', '-E', '-'], stdin=open(os.devnull, 'rb'))
m = re.search(br'^#define __clang__ 1', raw, flags=re.M)
cc_name = 'gcc' if m is None else 'clang'
ver = int(re.search(br'#define __GNUC__ (\d+)', raw, flags=re.M).group(1)), int(
re.search(br'#define __GNUC_MINOR__ (\d+)', raw, flags=re.M).group(1))
return cc, ver, cc_name
def get_sanitize_args(cc, ccver):
sanitize_args = set()
if cc == 'gcc' and ccver < (4, 8):
return sanitize_args
sanitize_args.add('-fno-omit-frame-pointer')
sanitize_args.add('-fsanitize=address')
if (cc == 'gcc' and ccver >= (5, 0)) or (cc == 'clang' and not isosx):
# clang on macOS does not support -fsanitize=undefined
sanitize_args.add('-fsanitize=undefined')
# if cc == 'gcc' or (cc == 'clang' and ccver >= (4, 2)):
# sanitize_args.add('-fno-sanitize-recover=all')
return sanitize_args
def init_env(debug=False, sanitize=False, native_optimizations=False, add_python=True):
native_optimizations = (native_optimizations and not sanitize and not debug)
cc, ccver, cc_name = cc_version()
stack_protector = '-fstack-protector'
if ccver >= (4, 9) and cc_name == 'gcc':
stack_protector += '-strong'
missing_braces = ''
if ccver < (5, 2) and cc_name == 'gcc':
missing_braces = '-Wno-missing-braces'
optimize = '-ggdb' if debug or sanitize else '-O3'
sanitize_args = get_sanitize_args(cc_name, ccver) if sanitize else set()
cflags = os.environ.get(
'OVERRIDE_CFLAGS', (
'-Wextra -Wno-missing-field-initializers -Wall -std=c99 -fvisibility=hidden'
' -pedantic-errors -Werror {} {} -D{}DEBUG -fwrapv {} {} -pipe {}').format(
optimize, ' '.join(sanitize_args), ('' if debug else 'N'), stack_protector,
missing_braces, '-march=native' if native_optimizations else ''))
libxml_cflags = pkg_config('libxml-2.0', '--cflags')
cflags = shlex.split(cflags) + libxml_cflags + shlex.split(sysconfig.get_config_var('CCSHARED'))
ldflags = os.environ.get(
'OVERRIDE_LDFLAGS', '-Wall -shared ' + ' '.join(sanitize_args) + ('' if debug else ' -O3'))
libxml_ldflags = pkg_config('libxml-2.0', '--libs')
ldflags = shlex.split(ldflags) + libxml_ldflags
cflags += shlex.split(os.environ.get('CFLAGS', ''))
ldflags += shlex.split(os.environ.get('LDFLAGS', ''))
cflags.append('-pthread')
ans = Env(cc, cflags, ldflags, cc, debug, cc_name, ccver)
return add_python_flags(ans) if add_python else ans
def run_tool(cmd):
if hasattr(cmd, 'lower'):
cmd = shlex.split(cmd)
print(' '.join(cmd))
p = subprocess.Popen(cmd)
ret = p.wait()
if ret != 0:
raise SystemExit(ret)
def newer(dest, *sources):
try:
dtime = os.path.getmtime(dest)
except EnvironmentError:
return True
for s in chain(sources, (self_path, )):
if os.path.getmtime(s) >= dtime:
return True
return False
def find_c_files(src_dir):
ans, headers = [], []
for x in os.listdir(src_dir):
ext = os.path.splitext(x)[1]
if ext == '.c' and not x.endswith('-check.c'):
ans.append(os.path.join(src_dir, x))
elif ext == '.h':
headers.append(os.path.join(src_dir, x))
ans.sort(key=os.path.getmtime, reverse=True)
return tuple(ans), tuple(headers)
def build_obj(src, env, headers):
suffix = '-debug' if env.debug else ''
obj = os.path.join(build_dir, os.path.basename(src).rpartition('.')[0] + suffix + '.o')
if newer(obj, src, *headers):
cflags = list(env.cflags)
if src.endswith('char_ref.c'):
cflags.append('-Wno-unused-const-variable')
cmd = [env.cc] + cflags + ['-c', src] + ['-o', obj]
run_tool(cmd)
return obj
TEST_EXE = os.path.join(build_dir, 'test')
MEMLEAK_EXE = os.path.join(build_dir, 'mem-leak-check')
if is_travis:
TEST_EXE = os.path.join(os.path.dirname(os.path.abspath(sys.executable)), 'test-html5-parser')
SRC_DIRS = 'src gumbo'.split()
MOD_EXT = '.so'
def link(objects, env):
dest = os.path.join(build_dir, 'html_parser' + MOD_EXT)
o = ['-o', dest]
cmd = [env.linker] + objects + o + env.ldflags
if newer(dest, *objects):
run_tool(cmd)
return dest
def build(args, build_leak_check=False):
debug_objects = []
debug_env = init_env(debug=True, sanitize=True)
for sdir in SRC_DIRS:
sources, headers = find_c_files(sdir)
if sdir == 'src':
headers += ('gumbo/gumbo.h', )
debug_objects.extend(build_obj(c, debug_env, headers) for c in sources)
link(debug_objects, debug_env)
ldflags = add_python_flags(deepcopy(debug_env), return_libs=True)
if newer(TEST_EXE, *debug_objects):
cmd = ([debug_env.cc] + debug_env.cflags + ['test.c'] + ['-o', TEST_EXE] + ldflags)
run_tool(cmd)
if build_leak_check and newer(MEMLEAK_EXE, 'mem-leak-check.c', *debug_objects):
cmd = ([debug_env.cc] + debug_env.cflags + ['mem-leak-check.c'] + [
'-o', MEMLEAK_EXE] + debug_objects + debug_env.ldflags)
cmd = [x for x in cmd if x not in {'-fPIC', '-pthread', '-shared'}]
run_tool(cmd)
for mod in glob.glob(os.path.join(build_dir, '*' + MOD_EXT)):
shutil.copy2(mod, freeze_dir)
for mod in glob.glob(os.path.join('src', 'html5_parser', '*.py')):
shutil.copy2(mod, freeze_dir)
TEST_COMMAND = ['run_tests.py']
def add_python_path(env, path):
pp = env.get('PYTHONPATH', '')
to_join = filter(None, [os.path.abspath(path), pp])
env['PYTHONPATH'] = os.pathsep.join(to_join)
return env
def option_parser():
p = argparse.ArgumentParser()
p.add_argument(
'action',
nargs='?',
default='test',
choices='build test try leak'.split(),
help='Action to perform (default is build)')
p.add_argument('rest', nargs='*')
return p
def main():
args = option_parser().parse_args()
os.chdir(base)
safe_makedirs(build_dir), safe_makedirs(freeze_dir)
if args.action == 'build':
build(args)
elif args.action == 'test':
build(args)
os.environ['ASAN_OPTIONS'] = 'leak_check_at_exit=0'
add_python_path(os.environ, os.path.dirname(freeze_dir))
print('\nrunning tests...')
os.execlp(TEST_EXE, TEST_EXE, 'run_tests.py', *args.rest)
elif args.action == 'try':
build(args)
os.environ['ASAN_OPTIONS'] = 'leak_check_at_exit=0'
add_python_path(os.environ, os.path.dirname(freeze_dir))
os.execlp(
TEST_EXE, TEST_EXE, '-c', 'from html5_parser import *; ' + args.rest[0], *args.rest[1:])
elif args.action == 'leak':
build(args, build_leak_check=True)
os.environ['MEMLEAK_EXE'] = os.path.abspath(MEMLEAK_EXE)
os.environ['ASAN_OPTIONS'] = 'leak_check_at_exit=0'
add_python_path(os.environ, os.path.dirname(freeze_dir))
os.execlp(TEST_EXE, TEST_EXE, 'run_tests.py')
if __name__ == '__main__':
main()
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