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annotate mercurial/progress.py @ 34661:eb586ed5d8ce
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author | Denis Laxalde <denis.laxalde@logilab.fr> |
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date | Thu, 12 Oct 2017 09:39:50 +0200 |
parents | a57c938e7ac8 |
children | 54fa3db5becf |
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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 self.estimateinterval = self.ui.configwith( |
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108 float, 'progress', 'estimateinterval') |
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109 |
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110 def show(self, now, topic, pos, item, unit, total): |
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111 if not shouldprint(self.ui): |
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112 return |
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113 termwidth = self.width() |
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114 self.printed = True |
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115 head = '' |
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116 needprogress = False |
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117 tail = '' |
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118 for indicator in self.order: |
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119 add = '' |
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120 if indicator == 'topic': |
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121 add = topic |
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122 elif indicator == 'number': |
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123 if total: |
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124 add = ('% ' + str(len(str(total))) + |
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125 's/%s') % (pos, total) |
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126 else: |
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127 add = str(pos) |
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128 elif indicator.startswith('item') and item: |
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129 slice = 'end' |
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130 if '-' in indicator: |
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131 wid = int(indicator.split('-')[1]) |
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132 elif '+' in indicator: |
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133 slice = 'beginning' |
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134 wid = int(indicator.split('+')[1]) |
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135 else: |
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136 wid = 20 |
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137 if slice == 'end': |
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138 add = encoding.trim(item, wid, leftside=True) |
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139 else: |
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140 add = encoding.trim(item, wid) |
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141 add += (wid - encoding.colwidth(add)) * ' ' |
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142 elif indicator == 'bar': |
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143 add = '' |
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144 needprogress = True |
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145 elif indicator == 'unit' and unit: |
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146 add = unit |
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147 elif indicator == 'estimate': |
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148 add = self.estimate(topic, pos, total, now) |
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149 elif indicator == 'speed': |
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150 add = self.speed(topic, pos, unit, now) |
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151 if not needprogress: |
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152 head = spacejoin(head, add) |
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153 else: |
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154 tail = spacejoin(tail, add) |
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155 if needprogress: |
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156 used = 0 |
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157 if head: |
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158 used += encoding.colwidth(head) + 1 |
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159 if tail: |
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160 used += encoding.colwidth(tail) + 1 |
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161 progwidth = termwidth - used - 3 |
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162 if total and pos <= total: |
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163 amt = pos * progwidth // total |
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164 bar = '=' * (amt - 1) |
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165 if amt > 0: |
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166 bar += '>' |
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167 bar += ' ' * (progwidth - amt) |
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168 else: |
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169 progwidth -= 3 |
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170 self.indetcount += 1 |
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171 # mod the count by twice the width so we can make the |
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172 # cursor bounce between the right and left sides |
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173 amt = self.indetcount % (2 * progwidth) |
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174 amt -= progwidth |
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175 bar = (' ' * int(progwidth - abs(amt)) + '<=>' + |
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176 ' ' * int(abs(amt))) |
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177 prog = ''.join(('[', bar, ']')) |
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178 out = spacejoin(head, prog, tail) |
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179 else: |
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180 out = spacejoin(head, tail) |
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181 self._writeerr('\r' + encoding.trim(out, termwidth)) |
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182 self.lasttopic = topic |
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183 self._flusherr() |
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184 |
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185 def clear(self): |
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186 if not self.printed or not self.lastprint or not shouldprint(self.ui): |
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187 return |
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188 self._writeerr('\r%s\r' % (' ' * self.width())) |
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189 if self.printed: |
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190 # force immediate re-paint of progress bar |
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191 self.lastprint = 0 |
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192 |
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193 def complete(self): |
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194 if not shouldprint(self.ui): |
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195 return |
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196 if self.ui.configbool('progress', 'clear-complete'): |
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197 self.clear() |
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198 else: |
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199 self._writeerr('\n') |
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200 self._flusherr() |
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201 |
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202 def _flusherr(self): |
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203 _eintrretry(self.ui.ferr.flush) |
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204 |
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205 def _writeerr(self, msg): |
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206 _eintrretry(self.ui.ferr.write, msg) |
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207 |
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208 def width(self): |
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209 tw = self.ui.termwidth() |
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210 return min(int(self.ui.config('progress', 'width', default=tw)), tw) |
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211 |
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212 def estimate(self, topic, pos, total, now): |
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213 if total is None: |
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214 return '' |
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215 initialpos = self.startvals[topic] |
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216 target = total - initialpos |
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217 delta = pos - initialpos |
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218 if delta > 0: |
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219 elapsed = now - self.starttimes[topic] |
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220 seconds = (elapsed * (target - delta)) // delta + 1 |
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221 return fmtremaining(seconds) |
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222 return '' |
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223 |
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224 def speed(self, topic, pos, unit, now): |
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225 initialpos = self.startvals[topic] |
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226 delta = pos - initialpos |
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227 elapsed = now - self.starttimes[topic] |
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228 if elapsed > 0: |
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229 return _('%d %s/sec') % (delta / elapsed, unit) |
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230 return '' |
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231 |
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232 def _oktoprint(self, now): |
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233 '''Check if conditions are met to print - e.g. changedelay elapsed''' |
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234 if (self.lasttopic is None # first time we printed |
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235 # not a topic change |
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236 or self.curtopic == self.lasttopic |
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237 # it's been long enough we should print anyway |
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238 or now - self.lastprint >= self.changedelay): |
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239 return True |
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240 else: |
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241 return False |
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242 |
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243 def _calibrateestimate(self, topic, now, pos): |
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244 '''Adjust starttimes and startvals for topic so ETA works better |
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245 |
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246 If progress is non-linear (ex. get much slower in the last minute), |
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247 it's more friendly to only use a recent time span for ETA and speed |
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248 calculation. |
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249 |
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250 [======================================> ] |
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251 ^^^^^^^ |
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252 estimateinterval, only use this for estimation |
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253 ''' |
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254 interval = self.estimateinterval |
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255 if interval <= 0: |
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256 return |
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257 elapsed = now - self.starttimes[topic] |
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258 if elapsed > interval: |
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259 delta = pos - self.startvals[topic] |
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260 newdelta = delta * interval / elapsed |
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261 # If a stall happens temporarily, ETA could change dramatically |
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262 # frequently. This is to avoid such dramatical change and make ETA |
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263 # smoother. |
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264 if newdelta < 0.1: |
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265 return |
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266 self.startvals[topic] = pos - newdelta |
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267 self.starttimes[topic] = now - interval |
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268 |
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269 def progress(self, topic, pos, item='', unit='', total=None): |
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270 now = time.time() |
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271 self._refreshlock.acquire() |
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272 try: |
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273 if pos is None: |
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274 self.starttimes.pop(topic, None) |
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275 self.startvals.pop(topic, None) |
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276 self.topicstates.pop(topic, None) |
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277 # reset the progress bar if this is the outermost topic |
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278 if self.topics and self.topics[0] == topic and self.printed: |
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279 self.complete() |
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280 self.resetstate() |
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281 # truncate the list of topics assuming all topics within |
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282 # this one are also closed |
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283 if topic in self.topics: |
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284 self.topics = self.topics[:self.topics.index(topic)] |
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285 # reset the last topic to the one we just unwound to, |
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286 # so that higher-level topics will be stickier than |
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287 # lower-level topics |
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288 if self.topics: |
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289 self.lasttopic = self.topics[-1] |
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290 else: |
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291 self.lasttopic = None |
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292 else: |
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293 if topic not in self.topics: |
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294 self.starttimes[topic] = now |
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295 self.startvals[topic] = pos |
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296 self.topics.append(topic) |
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297 self.topicstates[topic] = pos, item, unit, total |
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298 self.curtopic = topic |
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299 self._calibrateestimate(topic, now, pos) |
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300 if now - self.lastprint >= self.refresh and self.topics: |
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301 if self._oktoprint(now): |
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302 self.lastprint = now |
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303 self.show(now, topic, *self.topicstates[topic]) |
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304 finally: |
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305 self._refreshlock.release() |