File: Utils.py

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#! /usr/bin/env python
# encoding: utf-8
# WARNING! All changes made to this file will be lost!

import os,sys,errno,traceback,inspect,re,shutil,datetime,gc
try:
	import subprocess
except:
	try:
		import waflib.extras.subprocess as subprocess
	except:
		print("The subprocess module is missing (python2.3?):\n try calling 'waf update --files=subprocess'\n or add a copy of subprocess.py to the python libraries")
try:
	from collections import deque
except ImportError:
	class deque(list):
		def popleft(self):
			return self.pop(0)
try:
	import _winreg as winreg
except:
	try:
		import winreg
	except:
		winreg=None
from waflib import Errors
try:
	from collections import UserDict
except:
	from UserDict import UserDict
try:
	from hashlib import md5
except:
	try:
		from md5 import md5
	except:
		pass
try:
	import threading
except:
	class threading(object):
		pass
	class Lock(object):
		def acquire(self):
			pass
		def release(self):
			pass
	threading.Lock=threading.Thread=Lock
else:
	run_old=threading.Thread.run
	def run(*args,**kwargs):
		try:
			run_old(*args,**kwargs)
		except(KeyboardInterrupt,SystemExit):
			raise
		except:
			sys.excepthook(*sys.exc_info())
	threading.Thread.run=run
SIG_NIL='iluvcuteoverload'
O644=420
O755=493
rot_chr=['\\','|','/','-']
rot_idx=0
try:
	from collections import defaultdict
except ImportError:
	class defaultdict(dict):
		def __init__(self,default_factory):
			super(defaultdict,self).__init__()
			self.default_factory=default_factory
		def __getitem__(self,key):
			try:
				return super(defaultdict,self).__getitem__(key)
			except KeyError:
				value=self.default_factory()
				self[key]=value
				return value
is_win32=sys.platform=='win32'
indicator='\x1b[K%s%s%s\r'
if is_win32 and'NOCOLOR'in os.environ:
	indicator='%s%s%s\r'
def readf(fname,m='r'):
	f=open(fname,m)
	try:
		txt=f.read()
	finally:
		f.close()
	return txt
def h_file(filename):
	f=open(filename,'rb')
	m=md5()
	while(filename):
		filename=f.read(100000)
		m.update(filename)
	f.close()
	return m.digest()
try:
	x=''.encode('hex')
except:
	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
"""
listdir=os.listdir
if is_win32:
	from ctypes import windll,byref,create_string_buffer
	def listdir_win32(s):
		if not s:
			dlen=4
			maxdrives=26
			buf=create_string_buffer(maxdrives*dlen)
			ndrives=windll.kernel32.GetLogicalDriveStringsA(maxdrives,byref(buf))
			return[buf.raw[4*i:4*i+3].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()
			e.errno=errno.ENOENT
			raise e
		return os.listdir(s)
	listdir=listdir_win32
def num2ver(ver):
	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 ex_stack():
	exc_type,exc_value,tb=sys.exc_info()
	exc_lines=traceback.format_exception(exc_type,exc_value,tb)
	return''.join(exc_lines)
def to_list(sth):
	if isinstance(sth,str):
		return sth.split()
	else:
		return sth
re_nl=re.compile('\r*\n',re.M)
def str_to_dict(txt):
	tbl={}
	lines=re_nl.split(txt)
	for x in lines:
		x=x.strip()
		if not x or x.startswith('#')or x.find('=')<0:
			continue
		tmp=x.split('=')
		tbl[tmp[0].strip()]='='.join(tmp[1:]).strip()
	return tbl
def split_path(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.split(re_sp,path)[2:]
		ret[0]='\\'+ret[0]
		return ret
	return re.split(re_sp,path)
if sys.platform=='cygwin':
	split_path=split_path_cygwin
elif is_win32:
	split_path=split_path_win32
split_path.__doc__="""
Split a path by / or \\. This function is not like os.path.split

:type  path: string
:param path: path to split
:return:     list of strings
"""
def check_dir(path):
	if not os.path.isdir(path):
		try:
			os.makedirs(path)
		except OSError ,e:
			if not os.path.isdir(path):
				raise Errors.WafError('Cannot create the folder %r'%path,ex=e)
def def_attrs(cls,**kw):
	for k,v in kw.items():
		if not hasattr(cls,k):
			setattr(cls,k,v)
def quote_define_name(s):
	fu=re.compile("[^a-zA-Z0-9]").sub("_",s)
	fu=fu.upper()
	return fu
def h_list(lst):
	m=md5()
	m.update(str(lst))
	return m.digest()
def h_fun(fun):
	try:
		return fun.code
	except AttributeError:
		try:
			h=inspect.getsource(fun)
		except IOError:
			h="nocode"
		try:
			fun.code=h
		except AttributeError:
			pass
		return h
reg_subst=re.compile(r"(\\\\)|(\$\$)|\$\{([^}]+)\}")
def subst_vars(expr,params):
	def repl_var(m):
		if m.group(1):
			return'\\'
		if m.group(2):
			return'$'
		try:
			return params.get_flat(m.group(3))
		except AttributeError:
			return params[m.group(3)]
	return reg_subst.sub(repl_var,expr)
def destos_to_binfmt(key):
	if key=='darwin':
		return'mac-o'
	elif key in('win32','cygwin','uwin','msys'):
		return'pe'
	return'elf'
def unversioned_sys_platform():
	s=sys.platform
	if s=='java':
		from java.lang import System
		s=System.getProperty('os.name')
		if s=='Mac OS X':
			return'darwin'
		elif s.startswith('Windows '):
			return'win32'
		elif s=='OS/2':
			return'os2'
		elif s=='HP-UX':
			return'hpux'
		elif s in('SunOS','Solaris'):
			return'sunos'
		else:s=s.lower()
	if s=='win32'or s.endswith('os2')and s!='sunos2':return s
	return re.split('\d+$',s)[0]
def nada(*k,**kw):
	pass
class Timer(object):
	def __init__(self):
		self.start_time=datetime.datetime.utcnow()
	def __str__(self):
		delta=datetime.datetime.utcnow()-self.start_time
		days=int(delta.days)
		hours=delta.seconds//3600
		minutes=(delta.seconds-hours*3600)//60
		seconds=delta.seconds-hours*3600-minutes*60+float(delta.microseconds)/1000/1000
		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)
if is_win32:
	old=shutil.copy2
	def copy2(src,dst):
		old(src,dst)
		shutil.copystat(src,src)
	setattr(shutil,'copy2',copy2)
if os.name=='java':
	try:
		gc.disable()
		gc.enable()
	except NotImplementedError:
		gc.disable=gc.enable
def read_la_file(path):
	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 nogc(fun):
	def f(*k,**kw):
		try:
			gc.disable()
			ret=fun(*k,**kw)
		finally:
			gc.enable()
		return ret
	f.__doc__=fun.__doc__
	return f
def run_once(fun):
	cache={}
	def wrap(k):
		try:
			return cache[k]
		except KeyError:
			ret=fun(k)
			cache[k]=ret
			return ret
	wrap.__cache__=cache
	return wrap
def get_registry_app_path(key,filename):
	if not winreg:
		return None
	try:
		result=winreg.QueryValue(key,"Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\%s.exe"%filename[0])
	except WindowsError:
		pass
	else:
		if os.path.isfile(result):
			return result