Mercurial > hgsubversion
annotate hgsubversion/compathacks.py @ 1490:bc73b80baf98
SqliteRevMap: wait indefinitely for database lock
Python sqlite has 5 seconds timeout by default, which means if a writer holds
the lock, and the second writer will error out after 5 seconds.
In our use-case, it makes sense to just wait. However, sqlite does not support
waiting forever (see sqlite3_busy_timeout). Therefore use a while loop to
workaround.
author | Jun Wu <quark@fb.com> |
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date | Tue, 19 Jul 2016 20:34:11 +0100 |
parents | c5b7fb8911c0 |
children | 8410a978c650 |
rev | line source |
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1 """Functions to work around API changes.""" |
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2 |
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3 import errno |
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4 import sys |
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5 |
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6 from mercurial import util |
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7 |
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8 def branchset(repo): |
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9 """Return the set of branches present in a repo. |
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10 |
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11 Works around branchtags() vanishing between 2.8 and 2.9. |
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12 """ |
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13 try: |
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14 return set(repo.branchmap()) |
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15 except AttributeError: |
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16 return set(repo.branchtags()) |
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17 |
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18 def pickle_load(f): |
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19 import cPickle as pickle |
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20 f.seek(0) |
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21 return pickle.load(f) |
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22 |
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23 def makememfilectx(repo, path, data, islink, isexec, copied): |
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24 """Return a memfilectx |
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25 |
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26 Works around memfilectx() adding a repo argument between 3.0 and 3.1. |
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27 """ |
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28 from mercurial import context |
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29 try: |
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30 return context.memfilectx(repo, path, data, islink, isexec, copied) |
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31 except TypeError: |
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32 return context.memfilectx(path, data, islink, isexec, copied) |
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33 |
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34 def filectxfn_deleted(memctx, path): |
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35 """ |
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36 Return None or raise an IOError as necessary if path is deleted. |
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37 |
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38 Call as: |
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39 |
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40 if path_missing: |
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41 return compathacks.filectxfn_deleted(memctx, path) |
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42 |
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43 Works around filectxfn's contract changing between 3.1 and 3.2: 3.2 onwards, |
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44 for deleted files, filectxfn should return None rather than returning |
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45 IOError. |
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46 """ |
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47 if getattr(memctx, '_returnnoneformissingfiles', False): |
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48 return None |
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49 raise IOError(errno.ENOENT, '%s is deleted' % path) |
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50 |
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51 def filectxfn_deleted_reraise(memctx): |
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52 """ |
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53 Return None or reraise exc as necessary. |
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54 |
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55 Call as: |
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56 |
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57 try: |
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58 # code that raises IOError if the path is missing |
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59 except IOError: |
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60 return compathacks.filectxfn_deleted_reraise(memctx) |
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61 |
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62 Works around filectxfn's contract changing between 3.1 and 3.2: 3.2 onwards, |
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63 for deleted files, filectxfn should return None rather than returning |
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64 IOError. |
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65 """ |
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66 exc_info = sys.exc_info() |
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67 if (exc_info[1].errno == errno.ENOENT and |
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68 getattr(memctx, '_returnnoneformissingfiles', False)): |
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69 return None |
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70 # preserve traceback info |
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71 raise exc_info[0], exc_info[1], exc_info[2] |
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72 |
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73 # copied from hg 3.8 |
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74 class _funcregistrarbase(object): |
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75 """Base of decorator to register a fuction for specific purpose |
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76 |
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77 This decorator stores decorated functions into own dict 'table'. |
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78 |
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79 The least derived class can be defined by overriding 'formatdoc', |
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80 for example:: |
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81 |
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82 class keyword(_funcregistrarbase): |
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83 _docformat = ":%s: %s" |
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84 |
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85 This should be used as below: |
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86 |
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87 keyword = registrar.keyword() |
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88 |
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89 @keyword('bar') |
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90 def barfunc(*args, **kwargs): |
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91 '''Explanation of bar keyword .... |
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92 ''' |
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93 pass |
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94 |
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95 In this case: |
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96 |
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97 - 'barfunc' is stored as 'bar' in '_table' of an instance 'keyword' above |
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98 - 'barfunc.__doc__' becomes ":bar: Explanation of bar keyword" |
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99 """ |
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100 def __init__(self, table=None): |
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101 if table is None: |
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102 self._table = {} |
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103 else: |
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104 self._table = table |
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105 |
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106 def __call__(self, decl, *args, **kwargs): |
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107 return lambda func: self._doregister(func, decl, *args, **kwargs) |
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108 |
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109 def _doregister(self, func, decl, *args, **kwargs): |
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110 name = self._getname(decl) |
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111 |
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112 if func.__doc__ and not util.safehasattr(func, '_origdoc'): |
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113 doc = func.__doc__.strip() |
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114 func._origdoc = doc |
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115 func.__doc__ = self._formatdoc(decl, doc) |
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116 |
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117 self._table[name] = func |
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118 self._extrasetup(name, func, *args, **kwargs) |
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119 |
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120 return func |
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121 |
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122 def _parsefuncdecl(self, decl): |
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123 """Parse function declaration and return the name of function in it |
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124 """ |
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125 i = decl.find('(') |
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126 if i >= 0: |
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127 return decl[:i] |
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128 else: |
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129 return decl |
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130 |
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131 def _getname(self, decl): |
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132 """Return the name of the registered function from decl |
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133 |
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134 Derived class should override this, if it allows more |
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135 descriptive 'decl' string than just a name. |
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136 """ |
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137 return decl |
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138 |
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139 _docformat = None |
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140 |
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141 def _formatdoc(self, decl, doc): |
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142 """Return formatted document of the registered function for help |
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143 |
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144 'doc' is '__doc__.strip()' of the registered function. |
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145 """ |
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146 return self._docformat % (decl, doc) |
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147 |
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148 def _extrasetup(self, name, func): |
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149 """Execute exra setup for registered function, if needed |
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150 """ |
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151 pass |