| # Copyright 2020 The Fuchsia Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| """A minimal ANSI escape code library.""" |
| |
| import sys |
| |
| # Reset terminal colour. |
| _RESET = "\033[0;0m" |
| |
| |
| # Wrap the string "s" with the given code and a reset prefix. |
| # |
| # Returns the string unmodified if stdout is not attached to a terminal. |
| def wrap(code: str, s: str) -> str: |
| if not sys.stdout.isatty(): |
| # Being piped. |
| return s |
| return "%s%s%s" % (code, s, _RESET) |
| |
| |
| # Emit a Select Graphic Rendition (SGR) ANSI code. |
| def sgr(*codes: int) -> str: |
| return "\033[%sm" % (";".join(str(c) for c in codes)) |
| |
| |
| # Wrap the string with a color. |
| def red(s: str) -> str: |
| return wrap(sgr(31), s) |
| |
| |
| def green(s: str) -> str: |
| return wrap(sgr(32), s) |
| |
| |
| def yellow(s: str) -> str: |
| return wrap(sgr(33), s) |
| |
| |
| def gray(s: str) -> str: |
| return wrap(sgr(90), s) |
| |
| |
| def bright_green(s: str) -> str: |
| return wrap(sgr(1, 32), s) |
