#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# Utilities for printing and coloring output.
#
# Copyright (C) 2022, Google LLC.
# Author: Daniel Latypov <dlatypov@google.com>
import datetime
import sys
import typing
_RESET = '\033[0;0m'
class Printer:
"" "Wraps a file object, providing utilities for coloring output, etc." ""
def __init__(self, print: bool=True , output: typing.IO[str]=sys.stdout):
self._output = output
self._print = print
if print:
self._use_color = output.isatty()
else :
self._use_color = False
def print(self, message: str) -> None :
if self._print:
print(message, file=self._output)
def print_with_timestamp(self, message: str) -> None :
ts = datetime.datetime.now().strftime('%H:%M:%S' )
self.print(f'[{ts}] {message}' )
def _color(self, code: str, text: str) -> str:
if not self._use_color:
return text
return code + text + _RESET
def red(self, text: str) -> str:
return self._color('\033[1;31m' , text)
def yellow(self, text: str) -> str:
return self._color('\033[1;33m' , text)
def green(self, text: str) -> str:
return self._color('\033[1;32m' , text)
def color_len(self) -> int:
"" "Returns the length of the color escape codes." ""
return len(self.red('' ))
# Provides a default instance that prints to stdout
stdout = Printer()
null_printer = Printer(print=False )
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