#
# Copyright (C) 2008 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


import sys
import os

REPO_TRACE = 'REPO_TRACE'

try:
    _TRACE = os.environ[REPO_TRACE] == '1'
except KeyError:
    _TRACE = False


def IsTrace():
    return _TRACE


def SetTrace():
    global _TRACE
    _TRACE = True


def Trace(fmt, *args):
    if IsTrace():
        print(fmt % args, file=sys.stderr)
