Mercurial > hg
annotate tests/test-pathencode.py @ 26749:4a82cb5c1dc8
dirstate: show develwarn for write() invocation without transaction
This is used to detect 'dirstate.write()' invocation without the value
gotten by 'repo.currenttransaction()' (mainly focused on 3rd party
extensions).
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Sat, 17 Oct 2015 01:15:34 +0900 |
parents | ce26928cbe41 |
children | a6eb4e481134 |
rev | line source |
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1 # This is a randomized test that generates different pathnames every |
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2 # time it is invoked, and tests the encoding of those pathnames. |
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3 # |
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4 # It uses a simple probabilistic model to generate valid pathnames |
26098 | 5 # that have proven likely to expose bugs and divergent behavior in |
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6 # different encoding implementations. |
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7 |
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8 from mercurial import store |
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9 import binascii, itertools, math, os, random, sys, time |
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10 import collections |
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11 |
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12 if sys.version_info[:2] < (2, 6): |
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13 sys.exit(0) |
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14 |
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15 validchars = set(map(chr, range(0, 256))) |
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16 alphanum = range(ord('A'), ord('Z')) |
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17 |
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18 for c in '\0/': |
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19 validchars.remove(c) |
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20 |
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21 winreserved = ('aux con prn nul'.split() + |
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22 ['com%d' % i for i in xrange(1, 10)] + |
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23 ['lpt%d' % i for i in xrange(1, 10)]) |
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24 |
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25 def casecombinations(names): |
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26 '''Build all case-diddled combinations of names.''' |
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27 |
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28 combos = set() |
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29 |
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30 for r in names: |
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31 for i in xrange(len(r) + 1): |
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32 for c in itertools.combinations(xrange(len(r)), i): |
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33 d = r |
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34 for j in c: |
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35 d = ''.join((d[:j], d[j].upper(), d[j + 1:])) |
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36 combos.add(d) |
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37 return sorted(combos) |
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38 |
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39 def buildprobtable(fp, cmd='hg manifest tip'): |
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40 '''Construct and print a table of probabilities for path name |
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41 components. The numbers are percentages.''' |
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42 |
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43 counts = collections.defaultdict(lambda: 0) |
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44 for line in os.popen(cmd).read().splitlines(): |
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45 if line[-2:] in ('.i', '.d'): |
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46 line = line[:-2] |
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47 if line.startswith('data/'): |
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48 line = line[5:] |
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49 for c in line: |
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50 counts[c] += 1 |
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51 for c in '\r/\n': |
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52 counts.pop(c, None) |
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53 t = sum(counts.itervalues()) / 100.0 |
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54 fp.write('probtable = (') |
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55 for i, (k, v) in enumerate(sorted(counts.iteritems(), key=lambda x: x[1], |
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56 reverse=True)): |
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57 if (i % 5) == 0: |
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58 fp.write('\n ') |
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59 vt = v / t |
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60 if vt < 0.0005: |
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61 break |
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62 fp.write('(%r, %.03f), ' % (k, vt)) |
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63 fp.write('\n )\n') |
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64 |
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65 # A table of character frequencies (as percentages), gleaned by |
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66 # looking at filelog names from a real-world, very large repo. |
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67 |
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68 probtable = ( |
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69 ('t', 9.828), ('e', 9.042), ('s', 8.011), ('a', 6.801), ('i', 6.618), |
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70 ('g', 5.053), ('r', 5.030), ('o', 4.887), ('p', 4.363), ('n', 4.258), |
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71 ('l', 3.830), ('h', 3.693), ('_', 3.659), ('.', 3.377), ('m', 3.194), |
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72 ('u', 2.364), ('d', 2.296), ('c', 2.163), ('b', 1.739), ('f', 1.625), |
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73 ('6', 0.666), ('j', 0.610), ('y', 0.554), ('x', 0.487), ('w', 0.477), |
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74 ('k', 0.476), ('v', 0.473), ('3', 0.336), ('1', 0.335), ('2', 0.326), |
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75 ('4', 0.310), ('5', 0.305), ('9', 0.302), ('8', 0.300), ('7', 0.299), |
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76 ('q', 0.298), ('0', 0.250), ('z', 0.223), ('-', 0.118), ('C', 0.095), |
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77 ('T', 0.087), ('F', 0.085), ('B', 0.077), ('S', 0.076), ('P', 0.076), |
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78 ('L', 0.059), ('A', 0.058), ('N', 0.051), ('D', 0.049), ('M', 0.046), |
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79 ('E', 0.039), ('I', 0.035), ('R', 0.035), ('G', 0.028), ('U', 0.026), |
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80 ('W', 0.025), ('O', 0.017), ('V', 0.015), ('H', 0.013), ('Q', 0.011), |
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81 ('J', 0.007), ('K', 0.005), ('+', 0.004), ('X', 0.003), ('Y', 0.001), |
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82 ) |
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83 |
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84 for c, _ in probtable: |
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85 validchars.remove(c) |
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86 validchars = list(validchars) |
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87 |
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88 def pickfrom(rng, table): |
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89 c = 0 |
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90 r = rng.random() * sum(i[1] for i in table) |
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91 for i, p in table: |
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92 c += p |
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93 if c >= r: |
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94 return i |
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95 |
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96 reservedcombos = casecombinations(winreserved) |
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97 |
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98 # The first component of a name following a slash. |
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99 |
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100 firsttable = ( |
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101 (lambda rng: pickfrom(rng, probtable), 90), |
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102 (lambda rng: rng.choice(validchars), 5), |
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103 (lambda rng: rng.choice(reservedcombos), 5), |
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104 ) |
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105 |
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106 # Components of a name following the first. |
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107 |
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108 resttable = firsttable[:-1] |
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109 |
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110 # Special suffixes. |
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111 |
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112 internalsuffixcombos = casecombinations('.hg .i .d'.split()) |
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113 |
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114 # The last component of a path, before a slash or at the end of a name. |
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115 |
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116 lasttable = resttable + ( |
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117 (lambda rng: '', 95), |
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118 (lambda rng: rng.choice(internalsuffixcombos), 5), |
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119 ) |
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120 |
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121 def makepart(rng, k): |
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122 '''Construct a part of a pathname, without slashes.''' |
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123 |
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124 p = pickfrom(rng, firsttable)(rng) |
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125 l = len(p) |
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126 ps = [p] |
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127 maxl = rng.randint(1, k) |
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128 while l < maxl: |
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129 p = pickfrom(rng, resttable)(rng) |
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130 l += len(p) |
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131 ps.append(p) |
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132 ps.append(pickfrom(rng, lasttable)(rng)) |
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133 return ''.join(ps) |
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134 |
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135 def makepath(rng, j, k): |
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136 '''Construct a complete pathname.''' |
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137 |
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138 return ('data/' + '/'.join(makepart(rng, k) for _ in xrange(j)) + |
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139 rng.choice(['.d', '.i'])) |
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140 |
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141 def genpath(rng, count): |
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142 '''Generate random pathnames with gradually increasing lengths.''' |
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143 |
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144 mink, maxk = 1, 4096 |
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145 def steps(): |
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146 for i in xrange(count): |
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147 yield mink + int(round(math.sqrt((maxk - mink) * float(i) / count))) |
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148 for k in steps(): |
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149 x = rng.randint(1, k) |
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150 y = rng.randint(1, k) |
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151 yield makepath(rng, x, y) |
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152 |
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153 def runtests(rng, seed, count): |
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154 nerrs = 0 |
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155 for p in genpath(rng, count): |
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156 h = store._pathencode(p) # uses C implementation, if available |
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157 r = store._hybridencode(p, True) # reference implementation in Python |
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158 if h != r: |
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159 if nerrs == 0: |
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160 print >> sys.stderr, 'seed:', hex(seed)[:-1] |
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161 print >> sys.stderr, "\np: '%s'" % p.encode("string_escape") |
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162 print >> sys.stderr, "h: '%s'" % h.encode("string_escape") |
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163 print >> sys.stderr, "r: '%s'" % r.encode("string_escape") |
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164 nerrs += 1 |
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165 return nerrs |
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166 |
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167 def main(): |
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168 import getopt |
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169 |
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170 # Empirically observed to take about a second to run |
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171 count = 100 |
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172 seed = None |
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173 opts, args = getopt.getopt(sys.argv[1:], 'c:s:', |
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174 ['build', 'count=', 'seed=']) |
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175 for o, a in opts: |
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176 if o in ('-c', '--count'): |
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177 count = int(a) |
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178 elif o in ('-s', '--seed'): |
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179 seed = long(a, base=0) # accepts base 10 or 16 strings |
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180 elif o == '--build': |
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181 buildprobtable(sys.stdout, |
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182 'find .hg/store/data -type f && ' |
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183 'cat .hg/store/fncache 2>/dev/null') |
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184 sys.exit(0) |
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185 |
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186 if seed is None: |
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187 try: |
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188 seed = long(binascii.hexlify(os.urandom(16)), 16) |
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189 except AttributeError: |
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190 seed = long(time.time() * 1000) |
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191 |
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192 rng = random.Random(seed) |
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193 if runtests(rng, seed, count): |
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194 sys.exit(1) |
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195 |
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196 if __name__ == '__main__': |
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197 main() |