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#!/usr/bin/env python
# -*- Mode: Python -*-
# GObject-Introspection - a framework for introspecting GObject libraries
# Copyright (C) 2010 Red Hat, Inc.
# Copyright (C) 2010 Johan Dahlin
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#
import os
import sys
from . import utils
(WARNING,
ERROR,
FATAL) = range(3)
class Position(object):
"""Represents a position in the source file which we
want to inform about.
"""
__slots__ = ('filename', 'line', 'column')
def __init__(self, filename=None, line=None, column=None):
self.filename = filename
self.line = line
self.column = column
def __cmp__(self, other):
return cmp((self.filename, self.line, self.column),
(other.filename, other.line, other.column))
def __repr__(self):
return '<Position %s:%d:%d>' % (
os.path.basename(self.filename),
self.line or -1,
self.column or -1)
def format(self, cwd):
filename = os.path.realpath(self.filename)
cwd = os.path.realpath(cwd)
common_prefix = os.path.commonprefix((filename, cwd))
if common_prefix:
filename = os.path.relpath(filename, common_prefix)
if self.column is not None:
return '%s:%d:%d' % (filename, self.line, self.column)
elif self.line is not None:
return '%s:%d' % (filename, self.line, )
else:
return '%s:' % (filename, )
def offset(self, offset):
return Position(self.filename, self.line + offset, self.column)
class MessageLogger(object):
_instance = None
def __init__(self, namespace, output=None):
if output is None:
output = sys.stderr
self._cwd = os.getcwd()
self._output = output
self._namespace = namespace
self._enable_warnings = False
self._warning_count = 0
@classmethod
def get(cls, *args, **kwargs):
if cls._instance is None:
cls._instance = cls(*args, **kwargs)
return cls._instance
def enable_warnings(self, enable):
self._enable_warnings = enable
def get_warning_count(self):
return self._warning_count
def log(self, log_type, text, positions=None, prefix=None):
"""Log a warning, using optional file positioning information.
If the warning is related to a ast.Node type, see log_node()."""
utils.break_on_debug_flag('warning')
self._warning_count += 1
if not self._enable_warnings and log_type != FATAL:
return
# Always drop through on fatal
if type(positions) == set:
positions = list(positions)
if isinstance(positions, Position):
positions = [positions]
if not positions:
positions = [Position('<unknown>')]
for position in positions[:-1]:
self._output.write("%s:\n" % (position.format(cwd=self._cwd), ))
last_position = positions[-1].format(cwd=self._cwd)
if log_type == WARNING:
error_type = "Warning"
elif log_type == ERROR:
error_type = "Error"
elif log_type == FATAL:
error_type = "Fatal"
if prefix:
text = ('%s: %s: %s: %s: %s\n' % (last_position, error_type,
self._namespace.name, prefix, text))
else:
if self._namespace:
text = ('%s: %s: %s: %s\n' % (last_position, error_type,
self._namespace.name, text))
else:
text = ('%s: %s: %s\n' % (last_position, error_type, text))
self._output.write(text)
if log_type == FATAL:
utils.break_on_debug_flag('fatal')
raise SystemExit(text)
def log_node(self, log_type, node, text, context=None, positions=None):
"""Log a warning, using information about file positions from
the given node. The optional context argument, if given, should be
another ast.Node type which will also be displayed. If no file position
information is available from the node, the position data from the
context will be used."""
if positions:
pass
elif getattr(node, 'file_positions', None):
positions = node.file_positions
elif context and context.file_positions:
positions = context.file_positions
else:
positions = []
if not context:
text = "context=%r %s" % (node, text)
if context:
text = "%s: %s" % (getattr(context, 'symbol', context.name), text)
elif not positions and hasattr(node, 'name'):
text = "(%s)%s: %s" % (node.__class__.__name__, node.name, text)
self.log(log_type, text, positions)
def log_symbol(self, log_type, symbol, text):
"""Log a warning in the context of the given symbol."""
self.log(log_type, text, symbol.position,
prefix="symbol=%r" % (symbol.ident, ))
def log_node(log_type, node, text, context=None, positions=None):
ml = MessageLogger.get()
ml.log_node(log_type, node, text, context=context, positions=positions)
def warn(text, positions=None, prefix=None):
ml = MessageLogger.get()
ml.log(WARNING, text, positions, prefix)
def warn_node(node, text, context=None, positions=None):
log_node(WARNING, node, text, context=context, positions=positions)
def warn_symbol(symbol, text):
ml = MessageLogger.get()
ml.log_symbol(WARNING, symbol, text)
def fatal(text, positions=None, prefix=None):
ml = MessageLogger.get()
ml.log(FATAL, text, positions, prefix)
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