Mercurial > hg
annotate mercurial/progress.py @ 26375:3686fa2b8eee
windows: insert file positioning call between reads and writes
fopen() and fdopen() have a unique-to-Windows requirement that
transitions between read and write operations in files opened
in modes r+, w+, and a+ perform a file positioning call
(fsetpos, fseek, or rewind) in between. While the MSDN docs don't
say what will happen if this is not done, observations reveal
that Python raises an IOError with errno 0. Furthermore, I
/think/ this behavior isn't deterministic. But I can reproduce
it reliably with subsequent patches applied that open revlogs
in a+ mode and perform both reads and writes.
This patch introduces a proxy class for file handles opened
in r+, w+, and a+ mode on Windows. The class intercepts calls
and audits whether a file positioning function has been called
between read and write operations. If not, a dummy, no-op seek
to the current file position is performed. This appears to be
sufficient to "trick" Windows into allowing transitions between
read and writes without raising errors.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 27 Sep 2015 18:46:53 -0700 |
parents | 1139d7cf9405 |
children | 72bccc1f26b1 |
rev | line source |
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1 # progress.py progress bars related code |
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2 # |
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3 # Copyright (C) 2010 Augie Fackler <durin42@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import sys |
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11 import threading |
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12 import time |
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13 |
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14 from .i18n import _ |
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15 from . import encoding |
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16 |
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17 def spacejoin(*args): |
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18 return ' '.join(s for s in args if s) |
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19 |
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20 def shouldprint(ui): |
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21 return not (ui.quiet or ui.plain()) and ( |
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22 ui._isatty(sys.stderr) or ui.configbool('progress', 'assume-tty')) |
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23 |
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24 def fmtremaining(seconds): |
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25 """format a number of remaining seconds in humain readable way |
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26 |
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27 This will properly display seconds, minutes, hours, days if needed""" |
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28 if seconds < 60: |
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29 # i18n: format XX seconds as "XXs" |
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30 return _("%02ds") % (seconds) |
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31 minutes = seconds // 60 |
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32 if minutes < 60: |
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33 seconds -= minutes * 60 |
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34 # i18n: format X minutes and YY seconds as "XmYYs" |
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35 return _("%dm%02ds") % (minutes, seconds) |
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36 # we're going to ignore seconds in this case |
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37 minutes += 1 |
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38 hours = minutes // 60 |
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39 minutes -= hours * 60 |
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40 if hours < 30: |
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41 # i18n: format X hours and YY minutes as "XhYYm" |
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42 return _("%dh%02dm") % (hours, minutes) |
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43 # we're going to ignore minutes in this case |
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44 hours += 1 |
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45 days = hours // 24 |
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46 hours -= days * 24 |
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47 if days < 15: |
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48 # i18n: format X days and YY hours as "XdYYh" |
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49 return _("%dd%02dh") % (days, hours) |
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50 # we're going to ignore hours in this case |
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51 days += 1 |
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52 weeks = days // 7 |
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53 days -= weeks * 7 |
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54 if weeks < 55: |
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55 # i18n: format X weeks and YY days as "XwYYd" |
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56 return _("%dw%02dd") % (weeks, days) |
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57 # we're going to ignore days and treat a year as 52 weeks |
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58 weeks += 1 |
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59 years = weeks // 52 |
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60 weeks -= years * 52 |
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61 # i18n: format X years and YY weeks as "XyYYw" |
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62 return _("%dy%02dw") % (years, weeks) |
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63 |
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64 class progbar(object): |
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65 def __init__(self, ui): |
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66 self.ui = ui |
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67 self._refreshlock = threading.Lock() |
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68 self.resetstate() |
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69 |
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70 def resetstate(self): |
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71 self.topics = [] |
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72 self.topicstates = {} |
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73 self.starttimes = {} |
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74 self.startvals = {} |
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75 self.printed = False |
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76 self.lastprint = time.time() + float(self.ui.config( |
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77 'progress', 'delay', default=3)) |
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78 self.curtopic = None |
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79 self.lasttopic = None |
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80 self.indetcount = 0 |
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81 self.refresh = float(self.ui.config( |
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82 'progress', 'refresh', default=0.1)) |
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83 self.changedelay = max(3 * self.refresh, |
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84 float(self.ui.config( |
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85 'progress', 'changedelay', default=1))) |
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86 self.order = self.ui.configlist( |
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87 'progress', 'format', |
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88 default=['topic', 'bar', 'number', 'estimate']) |
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89 |
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90 def show(self, now, topic, pos, item, unit, total): |
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91 if not shouldprint(self.ui): |
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92 return |
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93 termwidth = self.width() |
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94 self.printed = True |
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95 head = '' |
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96 needprogress = False |
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97 tail = '' |
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98 for indicator in self.order: |
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99 add = '' |
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100 if indicator == 'topic': |
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101 add = topic |
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102 elif indicator == 'number': |
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103 if total: |
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104 add = ('% ' + str(len(str(total))) + |
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105 's/%s') % (pos, total) |
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106 else: |
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107 add = str(pos) |
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108 elif indicator.startswith('item') and item: |
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109 slice = 'end' |
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110 if '-' in indicator: |
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111 wid = int(indicator.split('-')[1]) |
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112 elif '+' in indicator: |
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113 slice = 'beginning' |
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114 wid = int(indicator.split('+')[1]) |
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115 else: |
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116 wid = 20 |
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117 if slice == 'end': |
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118 add = encoding.trim(item, wid, leftside=True) |
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119 else: |
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120 add = encoding.trim(item, wid) |
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121 add += (wid - encoding.colwidth(add)) * ' ' |
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122 elif indicator == 'bar': |
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123 add = '' |
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124 needprogress = True |
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125 elif indicator == 'unit' and unit: |
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126 add = unit |
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127 elif indicator == 'estimate': |
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128 add = self.estimate(topic, pos, total, now) |
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129 elif indicator == 'speed': |
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130 add = self.speed(topic, pos, unit, now) |
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131 if not needprogress: |
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132 head = spacejoin(head, add) |
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133 else: |
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134 tail = spacejoin(tail, add) |
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135 if needprogress: |
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136 used = 0 |
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137 if head: |
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138 used += encoding.colwidth(head) + 1 |
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139 if tail: |
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140 used += encoding.colwidth(tail) + 1 |
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141 progwidth = termwidth - used - 3 |
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142 if total and pos <= total: |
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143 amt = pos * progwidth // total |
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144 bar = '=' * (amt - 1) |
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145 if amt > 0: |
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146 bar += '>' |
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147 bar += ' ' * (progwidth - amt) |
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148 else: |
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149 progwidth -= 3 |
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150 self.indetcount += 1 |
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151 # mod the count by twice the width so we can make the |
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152 # cursor bounce between the right and left sides |
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153 amt = self.indetcount % (2 * progwidth) |
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154 amt -= progwidth |
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155 bar = (' ' * int(progwidth - abs(amt)) + '<=>' + |
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156 ' ' * int(abs(amt))) |
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157 prog = ''.join(('[', bar , ']')) |
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158 out = spacejoin(head, prog, tail) |
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159 else: |
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160 out = spacejoin(head, tail) |
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161 sys.stderr.write('\r' + encoding.trim(out, termwidth)) |
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162 self.lasttopic = topic |
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163 sys.stderr.flush() |
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164 |
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165 def clear(self): |
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166 if not shouldprint(self.ui): |
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167 return |
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168 sys.stderr.write('\r%s\r' % (' ' * self.width())) |
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169 |
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170 def complete(self): |
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171 if not shouldprint(self.ui): |
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172 return |
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173 if self.ui.configbool('progress', 'clear-complete', default=True): |
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174 self.clear() |
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175 else: |
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176 sys.stderr.write('\n') |
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177 sys.stderr.flush() |
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178 |
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179 def width(self): |
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180 tw = self.ui.termwidth() |
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181 return min(int(self.ui.config('progress', 'width', default=tw)), tw) |
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182 |
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183 def estimate(self, topic, pos, total, now): |
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184 if total is None: |
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185 return '' |
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186 initialpos = self.startvals[topic] |
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187 target = total - initialpos |
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188 delta = pos - initialpos |
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189 if delta > 0: |
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190 elapsed = now - self.starttimes[topic] |
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191 # experimental config: progress.estimate |
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192 if elapsed > float( |
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193 self.ui.config('progress', 'estimate', default=2)): |
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194 seconds = (elapsed * (target - delta)) // delta + 1 |
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195 return fmtremaining(seconds) |
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196 return '' |
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197 |
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198 def speed(self, topic, pos, unit, now): |
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199 initialpos = self.startvals[topic] |
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200 delta = pos - initialpos |
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201 elapsed = now - self.starttimes[topic] |
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202 if elapsed > float( |
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203 self.ui.config('progress', 'estimate', default=2)): |
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204 return _('%d %s/sec') % (delta / elapsed, unit) |
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205 return '' |
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206 |
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207 def _oktoprint(self, now): |
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208 '''Check if conditions are met to print - e.g. changedelay elapsed''' |
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209 if (self.lasttopic is None # first time we printed |
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210 # not a topic change |
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211 or self.curtopic == self.lasttopic |
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212 # it's been long enough we should print anyway |
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213 or now - self.lastprint >= self.changedelay): |
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214 return True |
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215 else: |
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216 return False |
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217 |
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218 def progress(self, topic, pos, item='', unit='', total=None): |
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219 now = time.time() |
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220 self._refreshlock.acquire() |
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221 try: |
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222 if pos is None: |
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223 self.starttimes.pop(topic, None) |
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224 self.startvals.pop(topic, None) |
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225 self.topicstates.pop(topic, None) |
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226 # reset the progress bar if this is the outermost topic |
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227 if self.topics and self.topics[0] == topic and self.printed: |
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228 self.complete() |
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229 self.resetstate() |
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230 # truncate the list of topics assuming all topics within |
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231 # this one are also closed |
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232 if topic in self.topics: |
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233 self.topics = self.topics[:self.topics.index(topic)] |
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234 # reset the last topic to the one we just unwound to, |
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235 # so that higher-level topics will be stickier than |
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236 # lower-level topics |
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237 if self.topics: |
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238 self.lasttopic = self.topics[-1] |
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239 else: |
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240 self.lasttopic = None |
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241 else: |
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242 if topic not in self.topics: |
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243 self.starttimes[topic] = now |
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244 self.startvals[topic] = pos |
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245 self.topics.append(topic) |
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246 self.topicstates[topic] = pos, item, unit, total |
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247 self.curtopic = topic |
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248 if now - self.lastprint >= self.refresh and self.topics: |
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249 if self._oktoprint(now): |
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250 self.lastprint = now |
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251 self.show(now, topic, *self.topicstates[topic]) |
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252 finally: |
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253 self._refreshlock.release() |