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+#!/usr/bin/env python
+# encoding: utf-8
+# Thomas Nagy, 2005-2018 (ita)
+
+"""
+Utilities and platform-specific fixes
+
+The portability fixes try to provide a consistent behavior of the Waf API
+through Python versions 2.5 to 3.X and across different platforms (win32, linux, etc)
+"""
+
+from __future__ import with_statement
+
+import atexit, os, sys, errno, inspect, re, datetime, platform, base64, signal, functools, time
+
+try:
+ import cPickle
+except ImportError:
+ import pickle as cPickle
+
+# leave this
+if os.name == 'posix' and sys.version_info[0] < 3:
+ try:
+ import subprocess32 as subprocess
+ except ImportError:
+ import subprocess
+else:
+ import subprocess
+
+try:
+ TimeoutExpired = subprocess.TimeoutExpired
+except AttributeError:
+ class TimeoutExpired(Exception):
+ pass
+
+from collections import deque, defaultdict
+
+try:
+ import _winreg as winreg
+except ImportError:
+ try:
+ import winreg
+ except ImportError:
+ winreg = None
+
+from waflib import Errors
+
+try:
+ from hashlib import md5
+except ImportError:
+ try:
+ from hashlib import sha1 as md5
+ except ImportError:
+ # never fail to enable potential fixes from another module
+ pass
+else:
+ try:
+ md5().digest()
+ except ValueError:
+ # Fips? #2213
+ from hashlib import sha1 as md5
+
+try:
+ import threading
+except ImportError:
+ if not 'JOBS' in os.environ:
+ # no threading :-(
+ os.environ['JOBS'] = '1'
+
+ class threading(object):
+ """
+ A fake threading class for platforms lacking the threading module.
+ Use ``waf -j1`` on those platforms
+ """
+ pass
+ class Lock(object):
+ """Fake Lock class"""
+ def acquire(self):
+ pass
+ def release(self):
+ pass
+ threading.Lock = threading.Thread = Lock
+
+SIG_NIL = 'SIG_NIL_SIG_NIL_'.encode()
+"""Arbitrary null value for hashes. Modify this value according to the hash function in use"""
+
+O644 = 420
+"""Constant representing the permissions for regular files (0644 raises a syntax error on python 3)"""
+
+O755 = 493
+"""Constant representing the permissions for executable files (0755 raises a syntax error on python 3)"""
+
+rot_chr = ['\\', '|', '/', '-']
+"List of characters to use when displaying the throbber (progress bar)"
+
+rot_idx = 0
+"Index of the current throbber character (progress bar)"
+
+class ordered_iter_dict(dict):
+ """Ordered dictionary that provides iteration from the most recently inserted keys first"""
+ def __init__(self, *k, **kw):
+ self.lst = deque()
+ dict.__init__(self, *k, **kw)
+ def clear(self):
+ dict.clear(self)
+ self.lst = deque()
+ def __setitem__(self, key, value):
+ if key in dict.keys(self):
+ self.lst.remove(key)
+ dict.__setitem__(self, key, value)
+ self.lst.append(key)
+ def __delitem__(self, key):
+ dict.__delitem__(self, key)
+ try:
+ self.lst.remove(key)
+ except ValueError:
+ pass
+ def __iter__(self):
+ return reversed(self.lst)
+ def keys(self):
+ return reversed(self.lst)
+
+class lru_node(object):
+ """
+ Used by :py:class:`waflib.Utils.lru_cache`
+ """
+ __slots__ = ('next', 'prev', 'key', 'val')
+ def __init__(self):
+ self.next = self
+ self.prev = self
+ self.key = None
+ self.val = None
+
+class lru_cache(object):
+ """
+ A simple least-recently used cache with lazy allocation
+ """
+ __slots__ = ('maxlen', 'table', 'head')
+ def __init__(self, maxlen=100):
+ self.maxlen = maxlen
+ """
+ Maximum amount of elements in the cache
+ """
+ self.table = {}
+ """
+ Mapping key-value
+ """
+ self.head = lru_node()
+ self.head.next = self.head
+ self.head.prev = self.head
+
+ def __getitem__(self, key):
+ node = self.table[key]
+ # assert(key==node.key)
+ if node is self.head:
+ return node.val
+
+ # detach the node found
+ node.prev.next = node.next
+ node.next.prev = node.prev
+
+ # replace the head
+ node.next = self.head.next
+ node.prev = self.head
+ self.head = node.next.prev = node.prev.next = node
+
+ return node.val
+
+ def __setitem__(self, key, val):
+ if key in self.table:
+ # update the value for an existing key
+ node = self.table[key]
+ node.val = val
+ self.__getitem__(key)
+ else:
+ if len(self.table) < self.maxlen:
+ # the very first item is unused until the maximum is reached
+ node = lru_node()
+ node.prev = self.head
+ node.next = self.head.next
+ node.prev.next = node.next.prev = node
+ else:
+ node = self.head = self.head.next
+ try:
+ # that's another key
+ del self.table[node.key]
+ except KeyError:
+ pass
+
+ node.key = key
+ node.val = val
+ self.table[key] = node
+
+class lazy_generator(object):
+ def __init__(self, fun, params):
+ self.fun = fun
+ self.params = params
+
+ def __iter__(self):
+ return self
+
+ def __next__(self):
+ try:
+ it = self.it
+ except AttributeError:
+ it = self.it = self.fun(*self.params)
+ return next(it)
+
+ next = __next__
+
+is_win32 = os.sep == '\\' or sys.platform == 'win32' or os.name == 'nt' # msys2
+"""
+Whether this system is a Windows series
+"""
+
+def readf(fname, m='r', encoding='latin-1'):
+ """
+ Reads an entire file into a string. See also :py:meth:`waflib.Node.Node.readf`::
+
+ def build(ctx):
+ from waflib import Utils
+ txt = Utils.readf(self.path.find_node('wscript').abspath())
+ txt = ctx.path.find_node('wscript').read()
+
+ :type fname: string
+ :param fname: Path to file
+ :type m: string
+ :param m: Open mode
+ :type encoding: string
+ :param encoding: encoding value, only used for python 3
+ :rtype: string
+ :return: Content of the file
+ """
+
+ if sys.hexversion > 0x3000000 and not 'b' in m:
+ m += 'b'
+ with open(fname, m) as f:
+ txt = f.read()
+ if encoding:
+ txt = txt.decode(encoding)
+ else:
+ txt = txt.decode()
+ else:
+ with open(fname, m) as f:
+ txt = f.read()
+ return txt
+
+def writef(fname, data, m='w', encoding='latin-1'):
+ """
+ Writes an entire file from a string.
+ See also :py:meth:`waflib.Node.Node.writef`::
+
+ def build(ctx):
+ from waflib import Utils
+ txt = Utils.writef(self.path.make_node('i_like_kittens').abspath(), 'some data')
+ self.path.make_node('i_like_kittens').write('some data')
+
+ :type fname: string
+ :param fname: Path to file
+ :type data: string
+ :param data: The contents to write to the file
+ :type m: string
+ :param m: Open mode
+ :type encoding: string
+ :param encoding: encoding value, only used for python 3
+ """
+ if sys.hexversion > 0x3000000 and not 'b' in m:
+ data = data.encode(encoding)
+ m += 'b'
+ with open(fname, m) as f:
+ f.write(data)
+
+def h_file(fname):
+ """
+ Computes a hash value for a file by using md5. Use the md5_tstamp
+ extension to get faster build hashes if necessary.
+
+ :type fname: string
+ :param fname: path to the file to hash
+ :return: hash of the file contents
+ :rtype: string or bytes
+ """
+ m = md5()
+ with open(fname, 'rb') as f:
+ while fname:
+ fname = f.read(200000)
+ m.update(fname)
+ return m.digest()
+
+def readf_win32(f, m='r', encoding='latin-1'):
+ flags = os.O_NOINHERIT | os.O_RDONLY
+ if 'b' in m:
+ flags |= os.O_BINARY
+ if '+' in m:
+ flags |= os.O_RDWR
+ try:
+ fd = os.open(f, flags)
+ except OSError:
+ raise IOError('Cannot read from %r' % f)
+
+ if sys.hexversion > 0x3000000 and not 'b' in m:
+ m += 'b'
+ with os.fdopen(fd, m) as f:
+ txt = f.read()
+ if encoding:
+ txt = txt.decode(encoding)
+ else:
+ txt = txt.decode()
+ else:
+ with os.fdopen(fd, m) as f:
+ txt = f.read()
+ return txt
+
+def writef_win32(f, data, m='w', encoding='latin-1'):
+ if sys.hexversion > 0x3000000 and not 'b' in m:
+ data = data.encode(encoding)
+ m += 'b'
+ flags = os.O_CREAT | os.O_TRUNC | os.O_WRONLY | os.O_NOINHERIT
+ if 'b' in m:
+ flags |= os.O_BINARY
+ if '+' in m:
+ flags |= os.O_RDWR
+ try:
+ fd = os.open(f, flags)
+ except OSError:
+ raise OSError('Cannot write to %r' % f)
+ with os.fdopen(fd, m) as f:
+ f.write(data)
+
+def h_file_win32(fname):
+ try:
+ fd = os.open(fname, os.O_BINARY | os.O_RDONLY | os.O_NOINHERIT)
+ except OSError:
+ raise OSError('Cannot read from %r' % fname)
+ m = md5()
+ with os.fdopen(fd, 'rb') as f:
+ while fname:
+ fname = f.read(200000)
+ m.update(fname)
+ return m.digest()
+
+# always save these
+readf_unix = readf
+writef_unix = writef
+h_file_unix = h_file
+if hasattr(os, 'O_NOINHERIT') and sys.hexversion < 0x3040000:
+ # replace the default functions
+ readf = readf_win32
+ writef = writef_win32
+ h_file = h_file_win32
+
+try:
+ x = ''.encode('hex')
+except LookupError:
+ import binascii
+ def to_hex(s):
+ ret = binascii.hexlify(s)
+ if not isinstance(ret, str):
+ ret = ret.decode('utf-8')
+ return ret
+else:
+ def to_hex(s):
+ return s.encode('hex')
+
+to_hex.__doc__ = """
+Return the hexadecimal representation of a string
+
+:param s: string to convert
+:type s: string
+"""
+
+def listdir_win32(s):
+ """
+ Lists the contents of a folder in a portable manner.
+ On Win32, returns the list of drive letters: ['C:', 'X:', 'Z:'] when an empty string is given.
+
+ :type s: string
+ :param s: a string, which can be empty on Windows
+ """
+ if not s:
+ try:
+ import ctypes
+ except ImportError:
+ # there is nothing much we can do
+ return [x + ':\\' for x in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ']
+ else:
+ dlen = 4 # length of "?:\\x00"
+ maxdrives = 26
+ buf = ctypes.create_string_buffer(maxdrives * dlen)
+ ndrives = ctypes.windll.kernel32.GetLogicalDriveStringsA(maxdrives*dlen, ctypes.byref(buf))
+ return [ str(buf.raw[4*i:4*i+2].decode('ascii')) for i in range(int(ndrives/dlen)) ]
+
+ if len(s) == 2 and s[1] == ":":
+ s += os.sep
+
+ if not os.path.isdir(s):
+ e = OSError('%s is not a directory' % s)
+ e.errno = errno.ENOENT
+ raise e
+ return os.listdir(s)
+
+listdir = os.listdir
+if is_win32:
+ listdir = listdir_win32
+
+def num2ver(ver):
+ """
+ Converts a string, tuple or version number into an integer. The number is supposed to have at most 4 digits::
+
+ from waflib.Utils import num2ver
+ num2ver('1.3.2') == num2ver((1,3,2)) == num2ver((1,3,2,0))
+
+ :type ver: string or tuple of numbers
+ :param ver: a version number
+ """
+ if isinstance(ver, str):
+ ver = tuple(ver.split('.'))
+ if isinstance(ver, tuple):
+ ret = 0
+ for i in range(4):
+ if i < len(ver):
+ ret += 256**(3 - i) * int(ver[i])
+ return ret
+ return ver
+
+def to_list(val):
+ """
+ Converts a string argument to a list by splitting it by spaces.
+ Returns the object if not a string::
+
+ from waflib.Utils import to_list
+ lst = to_list('a b c d')
+
+ :param val: list of string or space-separated string
+ :rtype: list
+ :return: Argument converted to list
+ """
+ if isinstance(val, str):
+ return val.split()
+ else:
+ return val
+
+def console_encoding():
+ try:
+ import ctypes
+ except ImportError:
+ pass
+ else:
+ try:
+ codepage = ctypes.windll.kernel32.GetConsoleCP()
+ except AttributeError:
+ pass
+ else:
+ if codepage:
+ return 'cp%d' % codepage
+ return sys.stdout.encoding or ('cp1252' if is_win32 else 'latin-1')
+
+def split_path_unix(path):
+ return path.split('/')
+
+def split_path_cygwin(path):
+ if path.startswith('//'):
+ ret = path.split('/')[2:]
+ ret[0] = '/' + ret[0]
+ return ret
+ return path.split('/')
+
+re_sp = re.compile('[/\\\\]+')
+def split_path_win32(path):
+ if path.startswith('\\\\'):
+ ret = re_sp.split(path)[1:]
+ ret[0] = '\\\\' + ret[0]
+ if ret[0] == '\\\\?':
+ return ret[1:]
+ return ret
+ return re_sp.split(path)
+
+msysroot = None
+def split_path_msys(path):
+ if path.startswith(('/', '\\')) and not path.startswith(('//', '\\\\')):
+ # msys paths can be in the form /usr/bin
+ global msysroot
+ if not msysroot:
+ # msys has python 2.7 or 3, so we can use this
+ msysroot = subprocess.check_output(['cygpath', '-w', '/']).decode(sys.stdout.encoding or 'latin-1')
+ msysroot = msysroot.strip()
+ path = os.path.normpath(msysroot + os.sep + path)
+ return split_path_win32(path)
+
+if sys.platform == 'cygwin':
+ split_path = split_path_cygwin
+elif is_win32:
+ # Consider this an MSYSTEM environment if $MSYSTEM is set and python
+ # reports is executable from a unix like path on a windows host.
+ if os.environ.get('MSYSTEM') and sys.executable.startswith('/'):
+ split_path = split_path_msys
+ else:
+ split_path = split_path_win32
+else:
+ split_path = split_path_unix
+
+split_path.__doc__ = """
+Splits a path by / or \\; do not confuse this function with with ``os.path.split``
+
+:type path: string
+:param path: path to split
+:return: list of string
+"""
+
+def check_dir(path):
+ """
+ Ensures that a directory exists (similar to ``mkdir -p``).
+
+ :type path: string
+ :param path: Path to directory
+ :raises: :py:class:`waflib.Errors.WafError` if the folder cannot be added.
+ """
+ if not os.path.isdir(path):
+ try:
+ os.makedirs(path)
+ except OSError as e:
+ if not os.path.isdir(path):
+ raise Errors.WafError('Cannot create the folder %r' % path, ex=e)
+
+def check_exe(name, env=None):
+ """
+ Ensures that a program exists
+
+ :type name: string
+ :param name: path to the program
+ :param env: configuration object
+ :type env: :py:class:`waflib.ConfigSet.ConfigSet`
+ :return: path of the program or None
+ :raises: :py:class:`waflib.Errors.WafError` if the folder cannot be added.
+ """
+ if not name:
+ raise ValueError('Cannot execute an empty string!')
+ def is_exe(fpath):
+ return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+ fpath, fname = os.path.split(name)
+ if fpath and is_exe(name):
+ return os.path.abspath(name)
+ else:
+ env = env or os.environ
+ for path in env['PATH'].split(os.pathsep):
+ path = path.strip('"')
+ exe_file = os.path.join(path, name)
+ if is_exe(exe_file):
+ return os.path.abspath(exe_file)
+ return None
+
+def def_attrs(cls, **kw):
+ """
+ Sets default attributes on a class instance
+
+ :type cls: class
+ :param cls: the class to update the given attributes in.
+ :type kw: dict
+ :param kw: dictionary of attributes names and values.
+ """
+ for k, v in kw.items():
+ if not hasattr(cls, k):
+ setattr(cls, k, v)
+
+def quote_define_name(s):
+ """
+ Converts a string into an identifier suitable for C defines.
+
+ :type s: string
+ :param s: String to convert
+ :rtype: string
+ :return: Identifier suitable for C defines
+ """
+ fu = re.sub('[^a-zA-Z0-9]', '_', s)
+ fu = re.sub('_+', '_', fu)
+ fu = fu.upper()
+ return fu
+
+re_sh = re.compile('\\s|\'|"')
+"""
+Regexp used for shell_escape below
+"""
+
+def shell_escape(cmd):
+ """
+ Escapes a command:
+ ['ls', '-l', 'arg space'] -> ls -l 'arg space'
+ """
+ if isinstance(cmd, str):
+ return cmd
+ return ' '.join(repr(x) if re_sh.search(x) else x for x in cmd)
+
+def h_list(lst):
+ """
+ Hashes lists of ordered data.
+
+ Using hash(tup) for tuples would be much more efficient,
+ but Python now enforces hash randomization
+
+ :param lst: list to hash
+ :type lst: list of strings
+ :return: hash of the list
+ """
+ return md5(repr(lst).encode()).digest()
+
+def h_fun(fun):
+ """
+ Hash functions
+
+ :param fun: function to hash
+ :type fun: function
+ :return: hash of the function
+ :rtype: string or bytes
+ """
+ try:
+ return fun.code
+ except AttributeError:
+ if isinstance(fun, functools.partial):
+ code = list(fun.args)
+ # The method items() provides a sequence of tuples where the first element
+ # represents an optional argument of the partial function application
+ #
+ # The sorting result outcome will be consistent because:
+ # 1. tuples are compared in order of their elements
+ # 2. optional argument namess are unique
+ code.extend(sorted(fun.keywords.items()))
+ code.append(h_fun(fun.func))
+ fun.code = h_list(code)
+ return fun.code
+ try:
+ h = inspect.getsource(fun)
+ except EnvironmentError:
+ h = 'nocode'
+ try:
+ fun.code = h
+ except AttributeError:
+ pass
+ return h
+
+def h_cmd(ins):
+ """
+ Hashes objects recursively
+
+ :param ins: input object
+ :type ins: string or list or tuple or function
+ :rtype: string or bytes
+ """
+ # this function is not meant to be particularly fast
+ if isinstance(ins, str):
+ # a command is either a string
+ ret = ins
+ elif isinstance(ins, list) or isinstance(ins, tuple):
+ # or a list of functions/strings
+ ret = str([h_cmd(x) for x in ins])
+ else:
+ # or just a python function
+ ret = str(h_fun(ins))
+ if sys.hexversion > 0x3000000:
+ ret = ret.encode('latin-1', 'xmlcharrefreplace')
+ return ret
+
+reg_subst = re.compile(r"(\\\\)|(\$\$)|\$\{([^}]+)\}")
+def subst_vars(expr, params):
+ """
+ Replaces ${VAR} with the value of VAR taken from a dict or a config set::
+
+ from waflib import Utils
+ s = Utils.subst_vars('${PREFIX}/bin', env)
+
+ :type expr: string
+ :param expr: String to perform substitution on
+ :param params: Dictionary or config set to look up variable values.
+ """
+ def repl_var(m):
+ if m.group(1):
+ return '\\'
+ if m.group(2):
+ return '$'
+ try:
+ # ConfigSet instances may contain lists
+ return params.get_flat(m.group(3))
+ except AttributeError:
+ return params[m.group(3)]
+ # if you get a TypeError, it means that 'expr' is not a string...
+ # Utils.subst_vars(None, env) will not work
+ return reg_subst.sub(repl_var, expr)
+
+def destos_to_binfmt(key):
+ """
+ Returns the binary format based on the unversioned platform name,
+ and defaults to ``elf`` if nothing is found.
+
+ :param key: platform name
+ :type key: string
+ :return: string representing the binary format
+ """
+ if key == 'darwin':
+ return 'mac-o'
+ elif key in ('win32', 'cygwin', 'uwin', 'msys'):
+ return 'pe'
+ return 'elf'
+
+def unversioned_sys_platform():
+ """
+ Returns the unversioned platform name.
+ Some Python platform names contain versions, that depend on
+ the build environment, e.g. linux2, freebsd6, etc.
+ This returns the name without the version number. Exceptions are
+ os2 and win32, which are returned verbatim.
+
+ :rtype: string
+ :return: Unversioned platform name
+ """
+ s = sys.platform
+ if s.startswith('java'):
+ # The real OS is hidden under the JVM.
+ from java.lang import System
+ s = System.getProperty('os.name')
+ # see http://lopica.sourceforge.net/os.html for a list of possible values
+ if s == 'Mac OS X':
+ return 'darwin'
+ elif s.startswith('Windows '):
+ return 'win32'
+ elif s == 'OS/2':
+ return 'os2'
+ elif s == 'HP-UX':
+ return 'hp-ux'
+ elif s in ('SunOS', 'Solaris'):
+ return 'sunos'
+ else: s = s.lower()
+
+ # powerpc == darwin for our purposes
+ if s == 'powerpc':
+ return 'darwin'
+ if s == 'win32' or s == 'os2':
+ return s
+ if s == 'cli' and os.name == 'nt':
+ # ironpython is only on windows as far as we know
+ return 'win32'
+ return re.split(r'\d+$', s)[0]
+
+def nada(*k, **kw):
+ """
+ Does nothing
+
+ :return: None
+ """
+ pass
+
+class Timer(object):
+ """
+ Simple object for timing the execution of commands.
+ Its string representation is the duration::
+
+ from waflib.Utils import Timer
+ timer = Timer()
+ a_few_operations()
+ s = str(timer)
+ """
+ def __init__(self):
+ self.start_time = self.now()
+
+ def __str__(self):
+ delta = self.now() - self.start_time
+ if not isinstance(delta, datetime.timedelta):
+ delta = datetime.timedelta(seconds=delta)
+ days = delta.days
+ hours, rem = divmod(delta.seconds, 3600)
+ minutes, seconds = divmod(rem, 60)
+ seconds += delta.microseconds * 1e-6
+ result = ''
+ if days:
+ result += '%dd' % days
+ if days or hours:
+ result += '%dh' % hours
+ if days or hours or minutes:
+ result += '%dm' % minutes
+ return '%s%.3fs' % (result, seconds)
+
+ def now(self):
+ return datetime.datetime.utcnow()
+
+ if hasattr(time, 'perf_counter'):
+ def now(self):
+ return time.perf_counter()
+
+def read_la_file(path):
+ """
+ Reads property files, used by msvc.py
+
+ :param path: file to read
+ :type path: string
+ """
+ sp = re.compile(r'^([^=]+)=\'(.*)\'$')
+ dc = {}
+ for line in readf(path).splitlines():
+ try:
+ _, left, right, _ = sp.split(line.strip())
+ dc[left] = right
+ except ValueError:
+ pass
+ return dc
+
+def run_once(fun):
+ """
+ Decorator: let a function cache its results, use like this::
+
+ @run_once
+ def foo(k):
+ return 345*2343
+
+ .. note:: in practice this can cause memory leaks, prefer a :py:class:`waflib.Utils.lru_cache`
+
+ :param fun: function to execute
+ :type fun: function
+ :return: the return value of the function executed
+ """
+ cache = {}
+ def wrap(*k):
+ try:
+ return cache[k]
+ except KeyError:
+ ret = fun(*k)
+ cache[k] = ret
+ return ret
+ wrap.__cache__ = cache
+ wrap.__name__ = fun.__name__
+ return wrap
+
+def get_registry_app_path(key, filename):
+ """
+ Returns the value of a registry key for an executable
+
+ :type key: string
+ :type filename: list of string
+ """
+ if not winreg:
+ return None
+ try:
+ result = winreg.QueryValue(key, "Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\%s.exe" % filename[0])
+ except OSError:
+ pass
+ else:
+ if os.path.isfile(result):
+ return result
+
+def lib64():
+ """
+ Guess the default ``/usr/lib`` extension for 64-bit applications
+
+ :return: '64' or ''
+ :rtype: string
+ """
+ # default settings for /usr/lib
+ if os.sep == '/':
+ if platform.architecture()[0] == '64bit':
+ if os.path.exists('/usr/lib64') and not os.path.exists('/usr/lib32'):
+ return '64'
+ return ''
+
+def sane_path(p):
+ # private function for the time being!
+ return os.path.abspath(os.path.expanduser(p))
+
+process_pool = []
+"""
+List of processes started to execute sub-process commands
+"""
+
+def get_process():
+ """
+ Returns a process object that can execute commands as sub-processes
+
+ :rtype: subprocess.Popen
+ """
+ try:
+ return process_pool.pop()
+ except IndexError:
+ filepath = os.path.dirname(os.path.abspath(__file__)) + os.sep + 'processor.py'
+ cmd = [sys.executable, '-c', readf(filepath)]
+ return subprocess.Popen(cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE, bufsize=0)
+
+def run_prefork_process(cmd, kwargs, cargs):
+ """
+ Delegates process execution to a pre-forked process instance.
+ """
+ if not 'env' in kwargs:
+ kwargs['env'] = dict(os.environ)
+ try:
+ obj = base64.b64encode(cPickle.dumps([cmd, kwargs, cargs]))
+ except (TypeError, AttributeError):
+ return run_regular_process(cmd, kwargs, cargs)
+
+ proc = get_process()
+ if not proc:
+ return run_regular_process(cmd, kwargs, cargs)
+
+ proc.stdin.write(obj)
+ proc.stdin.write('\n'.encode())
+ proc.stdin.flush()
+ obj = proc.stdout.readline()
+ if not obj:
+ raise OSError('Preforked sub-process %r died' % proc.pid)
+
+ process_pool.append(proc)
+ lst = cPickle.loads(base64.b64decode(obj))
+ # Jython wrapper failures (bash/execvp)
+ assert len(lst) == 5
+ ret, out, err, ex, trace = lst
+ if ex:
+ if ex == 'OSError':
+ raise OSError(trace)
+ elif ex == 'ValueError':
+ raise ValueError(trace)
+ elif ex == 'TimeoutExpired':
+ exc = TimeoutExpired(cmd, timeout=cargs['timeout'], output=out)
+ exc.stderr = err
+ raise exc
+ else:
+ raise Exception(trace)
+ return ret, out, err
+
+def lchown(path, user=-1, group=-1):
+ """
+ Change the owner/group of a path, raises an OSError if the
+ ownership change fails.
+
+ :param user: user to change
+ :type user: int or str
+ :param group: group to change
+ :type group: int or str
+ """
+ if isinstance(user, str):
+ import pwd
+ entry = pwd.getpwnam(user)
+ if not entry:
+ raise OSError('Unknown user %r' % user)
+ user = entry[2]
+ if isinstance(group, str):
+ import grp
+ entry = grp.getgrnam(group)
+ if not entry:
+ raise OSError('Unknown group %r' % group)
+ group = entry[2]
+ return os.lchown(path, user, group)
+
+def run_regular_process(cmd, kwargs, cargs={}):
+ """
+ Executes a subprocess command by using subprocess.Popen
+ """
+ proc = subprocess.Popen(cmd, **kwargs)
+ if kwargs.get('stdout') or kwargs.get('stderr'):
+ try:
+ out, err = proc.communicate(**cargs)
+ except TimeoutExpired:
+ if kwargs.get('start_new_session') and hasattr(os, 'killpg'):
+ os.killpg(proc.pid, signal.SIGKILL)
+ else:
+ proc.kill()
+ out, err = proc.communicate()
+ exc = TimeoutExpired(proc.args, timeout=cargs['timeout'], output=out)
+ exc.stderr = err
+ raise exc
+ status = proc.returncode
+ else:
+ out, err = (None, None)
+ try:
+ status = proc.wait(**cargs)
+ except TimeoutExpired as e:
+ if kwargs.get('start_new_session') and hasattr(os, 'killpg'):
+ os.killpg(proc.pid, signal.SIGKILL)
+ else:
+ proc.kill()
+ proc.wait()
+ raise e
+ return status, out, err
+
+def run_process(cmd, kwargs, cargs={}):
+ """
+ Executes a subprocess by using a pre-forked process when possible
+ or falling back to subprocess.Popen. See :py:func:`waflib.Utils.run_prefork_process`
+ and :py:func:`waflib.Utils.run_regular_process`
+ """
+ if kwargs.get('stdout') and kwargs.get('stderr'):
+ return run_prefork_process(cmd, kwargs, cargs)
+ else:
+ return run_regular_process(cmd, kwargs, cargs)
+
+def alloc_process_pool(n, force=False):
+ """
+ Allocates an amount of processes to the default pool so its size is at least *n*.
+ It is useful to call this function early so that the pre-forked
+ processes use as little memory as possible.
+
+ :param n: pool size
+ :type n: integer
+ :param force: if True then *n* more processes are added to the existing pool
+ :type force: bool
+ """
+ # mandatory on python2, unnecessary on python >= 3.2
+ global run_process, get_process, alloc_process_pool
+ if not force:
+ n = max(n - len(process_pool), 0)
+ try:
+ lst = [get_process() for x in range(n)]
+ except OSError:
+ run_process = run_regular_process
+ get_process = alloc_process_pool = nada
+ else:
+ for x in lst:
+ process_pool.append(x)
+
+def atexit_pool():
+ for k in process_pool:
+ try:
+ os.kill(k.pid, 9)
+ except OSError:
+ pass
+ else:
+ k.wait()
+# see #1889
+if (sys.hexversion<0x207000f and not is_win32) or sys.hexversion>=0x306000f:
+ atexit.register(atexit_pool)
+
+if os.environ.get('WAF_NO_PREFORK') or sys.platform == 'cli' or not sys.executable:
+ run_process = run_regular_process
+ get_process = alloc_process_pool = nada
+