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# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
#
# 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
from nemo.constants import NEMO_ENV_VARNAME_ENABLE_COLORING
from nemo.utils.env_var_parsing import get_envbool
__all__ = ["check_color_support", "to_unicode"]
def check_color_support():
# Colors can be forced with an env variable
if not sys.platform.lower().startswith("win") and get_envbool(NEMO_ENV_VARNAME_ENABLE_COLORING, False):
return True
def to_unicode(value):
"""
Converts a string argument to a unicode string.
If the argument is already a unicode string or None, it is returned
unchanged. Otherwise it must be a byte string and is decoded as utf8.
"""
try:
if isinstance(value, (str, type(None))):
return value
if not isinstance(value, bytes):
raise TypeError("Expected bytes, unicode, or None; got %r" % type(value))
return value.decode("utf-8")
except UnicodeDecodeError:
return repr(value)