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# -*- coding:utf-8 -*-
#
# Copyright (C) 2009 The Android Open Source Project
#
# 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 os
import sys
from time import time
from repo_trace import IsTrace
_NOT_TTY = not os.isatty(2)
# This will erase all content in the current line (wherever the cursor is).
# It does not move the cursor, so this is usually followed by \r to move to
# column 0.
CSI_ERASE_LINE = '\x1b[2K'
class Progress(object):
def __init__(self, title, total=0, units='', print_newline=False,
always_print_percentage=False):
self._title = title
self._total = total
self._done = 0
self._lastp = -1
self._start = time()
self._show = False
self._units = units
self._print_newline = print_newline
self._always_print_percentage = always_print_percentage
def update(self, inc=1, msg=''):
self._done += inc
if _NOT_TTY or IsTrace():
return
if not self._show:
if 0.5 <= time() - self._start:
self._show = True
else:
return
if self._total <= 0:
sys.stderr.write('%s\r%s: %d,' % (
CSI_ERASE_LINE,
self._title,
self._done))
sys.stderr.flush()
else:
p = (100 * self._done) / self._total
if self._lastp != p or self._always_print_percentage:
self._lastp = p
sys.stderr.write('%s\r%s: %3d%% (%d%s/%d%s)%s%s%s' % (
CSI_ERASE_LINE,
self._title,
p,
self._done, self._units,
self._total, self._units,
' ' if msg else '', msg,
"\n" if self._print_newline else ""))
sys.stderr.flush()
def end(self):
if _NOT_TTY or IsTrace() or not self._show:
return
if self._total <= 0:
sys.stderr.write('%s\r%s: %d, done.\n' % (
CSI_ERASE_LINE,
self._title,
self._done))
sys.stderr.flush()
else:
p = (100 * self._done) / self._total
sys.stderr.write('%s\r%s: %3d%% (%d%s/%d%s), done.\n' % (
CSI_ERASE_LINE,
self._title,
p,
self._done, self._units,
self._total, self._units))
sys.stderr.flush()
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