Commit bbd01435 authored by Simon Glass's avatar Simon Glass

patman: Use ANSI colours only when outputting to a terminal

It is easy to detect whether or not the process is connected to a terminal,
or piped to a file. Disable ANSI colours automatically when output is
not to a terminal.
Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
parent c8142633
......@@ -24,6 +24,12 @@
This module handles terminal interaction including ANSI color codes.
"""
import os
import sys
# Selection of when we want our output to be colored
COLOR_IF_TERMINAL, COLOR_ALWAYS, COLOR_NEVER = range(3)
class Color(object):
"""Conditionally wraps text in ANSI color escape sequences."""
BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
......@@ -32,14 +38,15 @@ class Color(object):
BOLD_START = '\033[1m'
RESET = '\033[0m'
def __init__(self, enabled=True):
def __init__(self, colored=COLOR_IF_TERMINAL):
"""Create a new Color object, optionally disabling color output.
Args:
enabled: True if color output should be enabled. If False then this
class will not add color codes at all.
"""
self._enabled = enabled
self._enabled = (colored == COLOR_ALWAYS or
(colored == COLOR_IF_TERMINAL and os.isatty(sys.stdout.fileno())))
def Start(self, color):
"""Returns a start color code.
......
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