Introduce code from Rust monorepo. This is a mess

tts/nemo/utils/formatters/utils.py

@@ -0,0 +1,46 @@
+# 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)