Mercurial > hg
annotate mercurial/progress.py @ 33822:42ad7cc645a4
copies: add more details to the documentation of mergecopies()
This documentation is very helpful for any developer to understand what
copytracing is and what the function does. Since this is the main function of
doing copytracing, I have also included bits about copytracing in it.
This additions are picked from a doc by Stash@Fb. So thanks to him.
Differential Revision: https://phab.mercurial-scm.org/D409
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Wed, 16 Aug 2017 00:25:20 +0530 |
parents | 0407a51b9d8c |
children | f428c347d32b |
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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 errno |
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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('progress')) and ( |
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22 ui._isatty(ui.ferr) 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 human 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 # file_write() and file_flush() of Python 2 do not restart on EINTR if |
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65 # the file is attached to a "slow" device (e.g. a terminal) and raise |
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66 # IOError. We cannot know how many bytes would be written by file_write(), |
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67 # but a progress text is known to be short enough to be written by a |
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68 # single write() syscall, so we can just retry file_write() with the whole |
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69 # text. (issue5532) |
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70 # |
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71 # This should be a short-term workaround. We'll need to fix every occurrence |
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72 # of write() to a terminal or pipe. |
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73 def _eintrretry(func, *args): |
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74 while True: |
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75 try: |
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76 return func(*args) |
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77 except IOError as err: |
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78 if err.errno == errno.EINTR: |
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79 continue |
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80 raise |
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81 |
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82 class progbar(object): |
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83 def __init__(self, ui): |
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84 self.ui = ui |
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85 self._refreshlock = threading.Lock() |
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86 self.resetstate() |
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87 |
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88 def resetstate(self): |
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89 self.topics = [] |
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90 self.topicstates = {} |
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91 self.starttimes = {} |
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92 self.startvals = {} |
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93 self.printed = False |
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94 self.lastprint = time.time() + float(self.ui.config( |
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95 'progress', 'delay')) |
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96 self.curtopic = None |
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97 self.lasttopic = None |
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98 self.indetcount = 0 |
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99 self.refresh = float(self.ui.config( |
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100 'progress', 'refresh')) |
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101 self.changedelay = max(3 * self.refresh, |
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102 float(self.ui.config( |
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103 'progress', 'changedelay'))) |
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104 self.order = self.ui.configlist( |
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105 'progress', 'format', |
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106 default=['topic', 'bar', 'number', 'estimate']) |
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107 |
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108 def show(self, now, topic, pos, item, unit, total): |
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109 if not shouldprint(self.ui): |
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110 return |
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111 termwidth = self.width() |
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112 self.printed = True |
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113 head = '' |
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114 needprogress = False |
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115 tail = '' |
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116 for indicator in self.order: |
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117 add = '' |
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118 if indicator == 'topic': |
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119 add = topic |
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120 elif indicator == 'number': |
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121 if total: |
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122 add = ('% ' + str(len(str(total))) + |
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123 's/%s') % (pos, total) |
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124 else: |
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125 add = str(pos) |
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126 elif indicator.startswith('item') and item: |
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127 slice = 'end' |
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128 if '-' in indicator: |
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129 wid = int(indicator.split('-')[1]) |
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130 elif '+' in indicator: |
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131 slice = 'beginning' |
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132 wid = int(indicator.split('+')[1]) |
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133 else: |
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134 wid = 20 |
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135 if slice == 'end': |
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136 add = encoding.trim(item, wid, leftside=True) |
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137 else: |
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138 add = encoding.trim(item, wid) |
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139 add += (wid - encoding.colwidth(add)) * ' ' |
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140 elif indicator == 'bar': |
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141 add = '' |
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142 needprogress = True |
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143 elif indicator == 'unit' and unit: |
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144 add = unit |
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145 elif indicator == 'estimate': |
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146 add = self.estimate(topic, pos, total, now) |
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147 elif indicator == 'speed': |
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148 add = self.speed(topic, pos, unit, now) |
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149 if not needprogress: |
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150 head = spacejoin(head, add) |
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151 else: |
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152 tail = spacejoin(tail, add) |
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153 if needprogress: |
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154 used = 0 |
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155 if head: |
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156 used += encoding.colwidth(head) + 1 |
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157 if tail: |
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158 used += encoding.colwidth(tail) + 1 |
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159 progwidth = termwidth - used - 3 |
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160 if total and pos <= total: |
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161 amt = pos * progwidth // total |
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162 bar = '=' * (amt - 1) |
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163 if amt > 0: |
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164 bar += '>' |
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165 bar += ' ' * (progwidth - amt) |
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166 else: |
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167 progwidth -= 3 |
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168 self.indetcount += 1 |
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169 # mod the count by twice the width so we can make the |
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170 # cursor bounce between the right and left sides |
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171 amt = self.indetcount % (2 * progwidth) |
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172 amt -= progwidth |
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173 bar = (' ' * int(progwidth - abs(amt)) + '<=>' + |
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174 ' ' * int(abs(amt))) |
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175 prog = ''.join(('[', bar , ']')) |
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176 out = spacejoin(head, prog, tail) |
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177 else: |
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178 out = spacejoin(head, tail) |
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179 self._writeerr('\r' + encoding.trim(out, termwidth)) |
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180 self.lasttopic = topic |
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181 self._flusherr() |
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182 |
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183 def clear(self): |
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184 if not self.printed or not self.lastprint or not shouldprint(self.ui): |
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185 return |
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186 self._writeerr('\r%s\r' % (' ' * self.width())) |
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187 if self.printed: |
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188 # force immediate re-paint of progress bar |
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189 self.lastprint = 0 |
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190 |
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191 def complete(self): |
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192 if not shouldprint(self.ui): |
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193 return |
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194 if self.ui.configbool('progress', 'clear-complete'): |
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195 self.clear() |
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196 else: |
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197 self._writeerr('\n') |
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198 self._flusherr() |
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199 |
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200 def _flusherr(self): |
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201 _eintrretry(self.ui.ferr.flush) |
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202 |
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203 def _writeerr(self, msg): |
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204 _eintrretry(self.ui.ferr.write, msg) |
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205 |
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206 def width(self): |
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207 tw = self.ui.termwidth() |
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208 return min(int(self.ui.config('progress', 'width', default=tw)), tw) |
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209 |
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210 def estimate(self, topic, pos, total, now): |
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211 if total is None: |
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212 return '' |
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213 initialpos = self.startvals[topic] |
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214 target = total - initialpos |
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215 delta = pos - initialpos |
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216 if delta > 0: |
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217 elapsed = now - self.starttimes[topic] |
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218 # experimental config: progress.estimate |
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219 if elapsed > float( |
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220 self.ui.config('progress', 'estimate')): |
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221 seconds = (elapsed * (target - delta)) // delta + 1 |
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222 return fmtremaining(seconds) |
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223 return '' |
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224 |
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225 def speed(self, topic, pos, unit, now): |
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226 initialpos = self.startvals[topic] |
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227 delta = pos - initialpos |
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228 elapsed = now - self.starttimes[topic] |
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229 if elapsed > float( |
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230 self.ui.config('progress', 'estimate')): |
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231 return _('%d %s/sec') % (delta / elapsed, unit) |
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232 return '' |
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233 |
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234 def _oktoprint(self, now): |
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235 '''Check if conditions are met to print - e.g. changedelay elapsed''' |
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236 if (self.lasttopic is None # first time we printed |
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237 # not a topic change |
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238 or self.curtopic == self.lasttopic |
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239 # it's been long enough we should print anyway |
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240 or now - self.lastprint >= self.changedelay): |
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241 return True |
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242 else: |
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243 return False |
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244 |
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245 def progress(self, topic, pos, item='', unit='', total=None): |
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246 now = time.time() |
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247 self._refreshlock.acquire() |
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248 try: |
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249 if pos is None: |
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250 self.starttimes.pop(topic, None) |
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251 self.startvals.pop(topic, None) |
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252 self.topicstates.pop(topic, None) |
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253 # reset the progress bar if this is the outermost topic |
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254 if self.topics and self.topics[0] == topic and self.printed: |
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255 self.complete() |
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256 self.resetstate() |
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257 # truncate the list of topics assuming all topics within |
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258 # this one are also closed |
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259 if topic in self.topics: |
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260 self.topics = self.topics[:self.topics.index(topic)] |
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261 # reset the last topic to the one we just unwound to, |
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262 # so that higher-level topics will be stickier than |
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263 # lower-level topics |
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264 if self.topics: |
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265 self.lasttopic = self.topics[-1] |
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266 else: |
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267 self.lasttopic = None |
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268 else: |
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269 if topic not in self.topics: |
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270 self.starttimes[topic] = now |
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271 self.startvals[topic] = pos |
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272 self.topics.append(topic) |
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273 self.topicstates[topic] = pos, item, unit, total |
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274 self.curtopic = topic |
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275 if now - self.lastprint >= self.refresh and self.topics: |
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276 if self._oktoprint(now): |
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277 self.lastprint = now |
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278 self.show(now, topic, *self.topicstates[topic]) |
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279 finally: |
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280 self._refreshlock.release() |