Mercurial > public > mercurial-scm > hg-stable

annotate tests/artifacts/scripts/generate-churning-bundle.py @ 41805:5f198b690301

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merge with stable
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 25 Feb 2019 18:51:08 -0800
parents 56a0de3d581c b59676077654
children 2372284d9457
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python
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2 #
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3 # generate-branchy-bundle - generate a branch for a "large" branchy repository
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4 #
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5 # Copyright 2018 Octobus, contact@octobus.net
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6 #
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7 # This software may be used and distributed according to the terms of the
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8 # GNU General Public License version 2 or any later version.
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9 #
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10 # This script generates a repository suitable for testing delta computation
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11 # strategies.
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12 #
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13 # The repository update a single "large" file with many updates. One fixed part
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14 # of the files always get updated while the rest of the lines get updated over
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15 # time. This update happens over many topological branches, some getting merged
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16 # back.
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17 #
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18 # Running with `chg` in your path and `CHGHG` set is recommended for speed.
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19
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20 from __future__ import absolute_import, print_function
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21
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22 import hashlib
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23 import os
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24 import shutil
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25 import subprocess
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26 import sys
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27 import tempfile
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28
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29 BUNDLE_NAME = 'big-file-churn.hg'
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30
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31 # constants for generating the repository
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32 NB_CHANGESET = 5000
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33 PERIOD_MERGING = 8
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34 PERIOD_BRANCHING = 7
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35 MOVE_BACK_MIN = 3
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36 MOVE_BACK_RANGE = 5
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37
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38 # constants for generating the large file we keep updating
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39 #
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40 # At each revision, the beginning on the file change,
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41 # and set of other lines changes too.
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42 FILENAME='SPARSE-REVLOG-TEST-FILE'
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43 NB_LINES = 10500
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44 ALWAYS_CHANGE_LINES = 500
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45 OTHER_CHANGES = 300
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46
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47 def nextcontent(previous_content):
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48 """utility to produce a new file content from the previous one"""
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49 return hashlib.md5(previous_content).hexdigest()
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50
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51 def filecontent(iteridx, oldcontent):
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52 """generate a new file content
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53
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54 The content is generated according the iteration index and previous
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55 content"""
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56
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57 # initial call
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58 if iteridx is None:
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59 current = ''
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60 else:
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61 current = str(iteridx)
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62
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63 for idx in xrange(NB_LINES):
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64 do_change_line = True
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65 if oldcontent is not None and ALWAYS_CHANGE_LINES < idx:
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66 do_change_line = not ((idx - iteridx) % OTHER_CHANGES)
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67
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68 if do_change_line:
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69 to_write = current + '\n'
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70 current = nextcontent(current)
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71 else:
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72 to_write = oldcontent[idx]
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73 yield to_write
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74
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75 def updatefile(filename, idx):
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76 """update <filename> to be at appropriate content for iteration <idx>"""
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77 existing = None
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78 if idx is not None:
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79 with open(filename, 'rb') as old:
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80 existing = old.readlines()
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81 with open(filename, 'wb') as target:
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82 for line in filecontent(idx, existing):
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83 target.write(line)
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84
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85 def hg(command, *args):
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86 """call a mercurial command with appropriate config and argument"""
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87 env = os.environ.copy()
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88 if 'CHGHG' in env:
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89 full_cmd = ['chg']
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90 else:
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91 full_cmd = ['hg']
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92 full_cmd.append('--quiet')
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93 full_cmd.append(command)
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94 if command == 'commit':
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95 # reproducible commit metadata
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96 full_cmd.extend(['--date', '0 0', '--user', 'test'])
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97 elif command == 'merge':
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98 # avoid conflicts by picking the local variant
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99 full_cmd.extend(['--tool', ':merge-local'])
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100 full_cmd.extend(args)
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101 env['HGRCPATH'] = ''
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102 return subprocess.check_call(full_cmd, env=env)
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103
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104 def run(target):
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105 tmpdir = tempfile.mkdtemp(prefix='tmp-hg-test-big-file-bundle-')
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106 try:
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107 os.chdir(tmpdir)
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108 hg('init')
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109 updatefile(FILENAME, None)
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110 hg('commit', '--addremove', '--message', 'initial commit')
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111 for idx in xrange(1, NB_CHANGESET + 1):
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112 if sys.stdout.isatty():
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113 print("generating commit #%d/%d" % (idx, NB_CHANGESET))
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114 if (idx % PERIOD_BRANCHING) == 0:
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115 move_back = MOVE_BACK_MIN + (idx % MOVE_BACK_RANGE)
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116 hg('update', ".~%d" % move_back)
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117 if (idx % PERIOD_MERGING) == 0:
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118 hg('merge', 'min(head())')
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119 updatefile(FILENAME, idx)
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120 hg('commit', '--message', 'commit #%d' % idx)
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121 hg('bundle', '--all', target, '--config', 'devel.bundle.delta=p1')
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122 with open(target, 'rb') as bundle:
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123 data = bundle.read()
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124 digest = hashlib.md5(data).hexdigest()
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125 with open(target + '.md5', 'wb') as md5file:
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126 md5file.write(digest + '\n')
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127 if sys.stdout.isatty():
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128 print('bundle generated at "%s" md5: %s' % (target, digest))
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129
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130 finally:
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131 shutil.rmtree(tmpdir)
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132 return 0
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133
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134 if __name__ == '__main__':
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135 orig = os.path.realpath(os.path.dirname(sys.argv[0]))
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136 target = os.path.join(orig, os.pardir, 'cache', BUNDLE_NAME)
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137 sys.exit(run(target))
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138