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+#!/usr/bin/env python
+# encoding: utf-8
+# Thomas Nagy, 2005-2018 (ita)
+
+"""
+logging, colors, terminal width and pretty-print
+"""
+
+import os, re, traceback, sys
+from waflib import Utils, ansiterm
+
+if not os.environ.get('NOSYNC', False):
+ # synchronized output is nearly mandatory to prevent garbled output
+ if sys.stdout.isatty() and id(sys.stdout) == id(sys.__stdout__):
+ sys.stdout = ansiterm.AnsiTerm(sys.stdout)
+ if sys.stderr.isatty() and id(sys.stderr) == id(sys.__stderr__):
+ sys.stderr = ansiterm.AnsiTerm(sys.stderr)
+
+# import the logging module after since it holds a reference on sys.stderr
+# in case someone uses the root logger
+import logging
+
+LOG_FORMAT = os.environ.get('WAF_LOG_FORMAT', '%(asctime)s %(c1)s%(zone)s%(c2)s %(message)s')
+HOUR_FORMAT = os.environ.get('WAF_HOUR_FORMAT', '%H:%M:%S')
+
+zones = []
+"""
+See :py:class:`waflib.Logs.log_filter`
+"""
+
+verbose = 0
+"""
+Global verbosity level, see :py:func:`waflib.Logs.debug` and :py:func:`waflib.Logs.error`
+"""
+
+colors_lst = {
+'USE' : True,
+'BOLD' :'\x1b[01;1m',
+'RED' :'\x1b[01;31m',
+'GREEN' :'\x1b[32m',
+'YELLOW':'\x1b[33m',
+'PINK' :'\x1b[35m',
+'BLUE' :'\x1b[01;34m',
+'CYAN' :'\x1b[36m',
+'GREY' :'\x1b[37m',
+'NORMAL':'\x1b[0m',
+'cursor_on' :'\x1b[?25h',
+'cursor_off' :'\x1b[?25l',
+}
+
+indicator = '\r\x1b[K%s%s%s'
+
+try:
+ unicode
+except NameError:
+ unicode = None
+
+def enable_colors(use):
+ """
+ If *1* is given, then the system will perform a few verifications
+ before enabling colors, such as checking whether the interpreter
+ is running in a terminal. A value of zero will disable colors,
+ and a value above *1* will force colors.
+
+ :param use: whether to enable colors or not
+ :type use: integer
+ """
+ if use == 1:
+ if not (sys.stderr.isatty() or sys.stdout.isatty()):
+ use = 0
+ if Utils.is_win32 and os.name != 'java':
+ term = os.environ.get('TERM', '') # has ansiterm
+ else:
+ term = os.environ.get('TERM', 'dumb')
+
+ if term in ('dumb', 'emacs'):
+ use = 0
+
+ if use >= 1:
+ os.environ['TERM'] = 'vt100'
+
+ colors_lst['USE'] = use
+
+# If console packages are available, replace the dummy function with a real
+# implementation
+try:
+ get_term_cols = ansiterm.get_term_cols
+except AttributeError:
+ def get_term_cols():
+ return 80
+
+get_term_cols.__doc__ = """
+ Returns the console width in characters.
+
+ :return: the number of characters per line
+ :rtype: int
+ """
+
+def get_color(cl):
+ """
+ Returns the ansi sequence corresponding to the given color name.
+ An empty string is returned when coloring is globally disabled.
+
+ :param cl: color name in capital letters
+ :type cl: string
+ """
+ if colors_lst['USE']:
+ return colors_lst.get(cl, '')
+ return ''
+
+class color_dict(object):
+ """attribute-based color access, eg: colors.PINK"""
+ def __getattr__(self, a):
+ return get_color(a)
+ def __call__(self, a):
+ return get_color(a)
+
+colors = color_dict()
+
+re_log = re.compile(r'(\w+): (.*)', re.M)
+class log_filter(logging.Filter):
+ """
+ Waf logs are of the form 'name: message', and can be filtered by 'waf --zones=name'.
+ For example, the following::
+
+ from waflib import Logs
+ Logs.debug('test: here is a message')
+
+ Will be displayed only when executing::
+
+ $ waf --zones=test
+ """
+ def __init__(self, name=''):
+ logging.Filter.__init__(self, name)
+
+ def filter(self, rec):
+ """
+ Filters log records by zone and by logging level
+
+ :param rec: log entry
+ """
+ rec.zone = rec.module
+ if rec.levelno >= logging.INFO:
+ return True
+
+ m = re_log.match(rec.msg)
+ if m:
+ rec.zone = m.group(1)
+ rec.msg = m.group(2)
+
+ if zones:
+ return getattr(rec, 'zone', '') in zones or '*' in zones
+ elif not verbose > 2:
+ return False
+ return True
+
+class log_handler(logging.StreamHandler):
+ """Dispatches messages to stderr/stdout depending on the severity level"""
+ def emit(self, record):
+ """
+ Delegates the functionality to :py:meth:`waflib.Log.log_handler.emit_override`
+ """
+ # default implementation
+ try:
+ try:
+ self.stream = record.stream
+ except AttributeError:
+ if record.levelno >= logging.WARNING:
+ record.stream = self.stream = sys.stderr
+ else:
+ record.stream = self.stream = sys.stdout
+ self.emit_override(record)
+ self.flush()
+ except (KeyboardInterrupt, SystemExit):
+ raise
+ except: # from the python library -_-
+ self.handleError(record)
+
+ def emit_override(self, record, **kw):
+ """
+ Writes the log record to the desired stream (stderr/stdout)
+ """
+ self.terminator = getattr(record, 'terminator', '\n')
+ stream = self.stream
+ if unicode:
+ # python2
+ msg = self.formatter.format(record)
+ fs = '%s' + self.terminator
+ try:
+ if (isinstance(msg, unicode) and getattr(stream, 'encoding', None)):
+ fs = fs.decode(stream.encoding)
+ try:
+ stream.write(fs % msg)
+ except UnicodeEncodeError:
+ stream.write((fs % msg).encode(stream.encoding))
+ else:
+ stream.write(fs % msg)
+ except UnicodeError:
+ stream.write((fs % msg).encode('utf-8'))
+ else:
+ logging.StreamHandler.emit(self, record)
+
+class formatter(logging.Formatter):
+ """Simple log formatter which handles colors"""
+ def __init__(self):
+ logging.Formatter.__init__(self, LOG_FORMAT, HOUR_FORMAT)
+
+ def format(self, rec):
+ """
+ Formats records and adds colors as needed. The records do not get
+ a leading hour format if the logging level is above *INFO*.
+ """
+ try:
+ msg = rec.msg.decode('utf-8')
+ except Exception:
+ msg = rec.msg
+
+ use = colors_lst['USE']
+ if (use == 1 and rec.stream.isatty()) or use == 2:
+
+ c1 = getattr(rec, 'c1', None)
+ if c1 is None:
+ c1 = ''
+ if rec.levelno >= logging.ERROR:
+ c1 = colors.RED
+ elif rec.levelno >= logging.WARNING:
+ c1 = colors.YELLOW
+ elif rec.levelno >= logging.INFO:
+ c1 = colors.GREEN
+ c2 = getattr(rec, 'c2', colors.NORMAL)
+ msg = '%s%s%s' % (c1, msg, c2)
+ else:
+ # remove single \r that make long lines in text files
+ # and other terminal commands
+ msg = re.sub(r'\r(?!\n)|\x1B\[(K|.*?(m|h|l))', '', msg)
+
+ if rec.levelno >= logging.INFO:
+ # the goal of this is to format without the leading "Logs, hour" prefix
+ if rec.args:
+ return msg % rec.args
+ return msg
+
+ rec.msg = msg
+ rec.c1 = colors.PINK
+ rec.c2 = colors.NORMAL
+ return logging.Formatter.format(self, rec)
+
+log = None
+"""global logger for Logs.debug, Logs.error, etc"""
+
+def debug(*k, **kw):
+ """
+ Wraps logging.debug and discards messages if the verbosity level :py:attr:`waflib.Logs.verbose` ≤ 0
+ """
+ if verbose:
+ k = list(k)
+ k[0] = k[0].replace('\n', ' ')
+ log.debug(*k, **kw)
+
+def error(*k, **kw):
+ """
+ Wrap logging.errors, adds the stack trace when the verbosity level :py:attr:`waflib.Logs.verbose` ≥ 2
+ """
+ log.error(*k, **kw)
+ if verbose > 2:
+ st = traceback.extract_stack()
+ if st:
+ st = st[:-1]
+ buf = []
+ for filename, lineno, name, line in st:
+ buf.append(' File %r, line %d, in %s' % (filename, lineno, name))
+ if line:
+ buf.append(' %s' % line.strip())
+ if buf:
+ log.error('\n'.join(buf))
+
+def warn(*k, **kw):
+ """
+ Wraps logging.warn
+ """
+ log.warn(*k, **kw)
+
+def info(*k, **kw):
+ """
+ Wraps logging.info
+ """
+ log.info(*k, **kw)
+
+def init_log():
+ """
+ Initializes the logger :py:attr:`waflib.Logs.log`
+ """
+ global log
+ log = logging.getLogger('waflib')
+ log.handlers = []
+ log.filters = []
+ hdlr = log_handler()
+ hdlr.setFormatter(formatter())
+ log.addHandler(hdlr)
+ log.addFilter(log_filter())
+ log.setLevel(logging.DEBUG)
+
+def make_logger(path, name):
+ """
+ Creates a simple logger, which is often used to redirect the context command output::
+
+ from waflib import Logs
+ bld.logger = Logs.make_logger('test.log', 'build')
+ bld.check(header_name='sadlib.h', features='cxx cprogram', mandatory=False)
+
+ # have the file closed immediately
+ Logs.free_logger(bld.logger)
+
+ # stop logging
+ bld.logger = None
+
+ The method finalize() of the command will try to free the logger, if any
+
+ :param path: file name to write the log output to
+ :type path: string
+ :param name: logger name (loggers are reused)
+ :type name: string
+ """
+ logger = logging.getLogger(name)
+ if sys.hexversion > 0x3000000:
+ encoding = sys.stdout.encoding
+ else:
+ encoding = None
+ hdlr = logging.FileHandler(path, 'w', encoding=encoding)
+ formatter = logging.Formatter('%(message)s')
+ hdlr.setFormatter(formatter)
+ logger.addHandler(hdlr)
+ logger.setLevel(logging.DEBUG)
+ return logger
+
+def make_mem_logger(name, to_log, size=8192):
+ """
+ Creates a memory logger to avoid writing concurrently to the main logger
+ """
+ from logging.handlers import MemoryHandler
+ logger = logging.getLogger(name)
+ hdlr = MemoryHandler(size, target=to_log)
+ formatter = logging.Formatter('%(message)s')
+ hdlr.setFormatter(formatter)
+ logger.addHandler(hdlr)
+ logger.memhandler = hdlr
+ logger.setLevel(logging.DEBUG)
+ return logger
+
+def free_logger(logger):
+ """
+ Frees the resources held by the loggers created through make_logger or make_mem_logger.
+ This is used for file cleanup and for handler removal (logger objects are re-used).
+ """
+ try:
+ for x in logger.handlers:
+ x.close()
+ logger.removeHandler(x)
+ except Exception:
+ pass
+
+def pprint(col, msg, label='', sep='\n'):
+ """
+ Prints messages in color immediately on stderr::
+
+ from waflib import Logs
+ Logs.pprint('RED', 'Something bad just happened')
+
+ :param col: color name to use in :py:const:`Logs.colors_lst`
+ :type col: string
+ :param msg: message to display
+ :type msg: string or a value that can be printed by %s
+ :param label: a message to add after the colored output
+ :type label: string
+ :param sep: a string to append at the end (line separator)
+ :type sep: string
+ """
+ info('%s%s%s %s', colors(col), msg, colors.NORMAL, label, extra={'terminator':sep})
+