u-boot/tools/patman/terminal.py
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

161 lines
4.4 KiB
Python

# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2011 The Chromium OS Authors.
#
"""Terminal utilities
This module handles terminal interaction including ANSI color codes.
"""
from __future__ import print_function
import os
import sys
# Selection of when we want our output to be colored
COLOR_IF_TERMINAL, COLOR_ALWAYS, COLOR_NEVER = range(3)
# Initially, we are set up to print to the terminal
print_test_mode = False
print_test_list = []
class PrintLine:
"""A line of text output
Members:
text: Text line that was printed
newline: True to output a newline after the text
colour: Text colour to use
"""
def __init__(self, text, newline, colour):
self.text = text
self.newline = newline
self.colour = colour
def __str__(self):
return 'newline=%s, colour=%s, text=%s' % (self.newline, self.colour,
self.text)
def Print(text='', newline=True, colour=None):
"""Handle a line of output to the terminal.
In test mode this is recorded in a list. Otherwise it is output to the
terminal.
Args:
text: Text to print
newline: True to add a new line at the end of the text
colour: Colour to use for the text
"""
if print_test_mode:
print_test_list.append(PrintLine(text, newline, colour))
else:
if colour:
col = Color()
text = col.Color(colour, text)
print(text, end='')
if newline:
print()
else:
sys.stdout.flush()
def SetPrintTestMode():
"""Go into test mode, where all printing is recorded"""
global print_test_mode
print_test_mode = True
def GetPrintTestLines():
"""Get a list of all lines output through Print()
Returns:
A list of PrintLine objects
"""
global print_test_list
ret = print_test_list
print_test_list = []
return ret
def EchoPrintTestLines():
"""Print out the text lines collected"""
for line in print_test_list:
if line.colour:
col = Color()
print(col.Color(line.colour, line.text), end='')
else:
print(line.text, end='')
if line.newline:
print()
class Color(object):
"""Conditionally wraps text in ANSI color escape sequences."""
BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
BOLD = -1
BRIGHT_START = '\033[1;%dm'
NORMAL_START = '\033[22;%dm'
BOLD_START = '\033[1m'
RESET = '\033[0m'
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.
"""
try:
self._enabled = (colored == COLOR_ALWAYS or
(colored == COLOR_IF_TERMINAL and
os.isatty(sys.stdout.fileno())))
except:
self._enabled = False
def Start(self, color, bright=True):
"""Returns a start color code.
Args:
color: Color to use, .e.g BLACK, RED, etc.
Returns:
If color is enabled, returns an ANSI sequence to start the given
color, otherwise returns empty string
"""
if self._enabled:
base = self.BRIGHT_START if bright else self.NORMAL_START
return base % (color + 30)
return ''
def Stop(self):
"""Retruns a stop color code.
Returns:
If color is enabled, returns an ANSI color reset sequence,
otherwise returns empty string
"""
if self._enabled:
return self.RESET
return ''
def Color(self, color, text, bright=True):
"""Returns text with conditionally added color escape sequences.
Keyword arguments:
color: Text color -- one of the color constants defined in this
class.
text: The text to color.
Returns:
If self._enabled is False, returns the original text. If it's True,
returns text with color escape sequences based on the value of
color.
"""
if not self._enabled:
return text
if color == self.BOLD:
start = self.BOLD_START
else:
base = self.BRIGHT_START if bright else self.NORMAL_START
start = base % (color + 30)
return start + text + self.RESET