Mercurial > hg
annotate mercurial/windows.py @ 25018:93e015a3d1ea
commit: add ui.allowemptycommit config option
This adds a config flag that enables a user to make empty commits.
This is useful in a number of cases.
For instance, automation that creates release branches via
bookmarks may want to make empty commits to that release bookmark so that it
can't be fast-forwarded and so it can record information about the release
bookmark's creation. This is already possible with named branches, so making it
possible for bookmarks makes sense.
Another case we've wanted it is for mirroring repositories into Mercurial. We
have automation that syncs commits into hg by running things from the command
line. The ability to produce empty commits is useful for syncing unusual commits
from other VCS's.
In general, allowing the user to create the DAG as they see fit seems useful,
and when I mentioned this in IRC more than one person piped up and said they
were already hacking around this limitation by using mq, import, and
commit-dummy-change-then-amend-the-content-away style solutions.
author | Durham Goode <durham@fb.com> |
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date | Mon, 11 May 2015 16:18:28 -0700 |
parents | 30b910fea244 |
children | 8ce36dba70d1 |
rev | line source |
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1 # windows.py - Windows utility function implementations for Mercurial |
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2 # |
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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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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7 |
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8 from i18n import _ |
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9 import osutil, encoding |
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10 import errno, msvcrt, os, re, stat, sys, _winreg |
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11 |
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12 import win32 |
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13 executablepath = win32.executablepath |
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14 getuser = win32.getuser |
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15 hidewindow = win32.hidewindow |
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16 makedir = win32.makedir |
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17 nlinks = win32.nlinks |
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18 oslink = win32.oslink |
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19 samedevice = win32.samedevice |
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20 samefile = win32.samefile |
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21 setsignalhandler = win32.setsignalhandler |
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22 spawndetached = win32.spawndetached |
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23 split = os.path.split |
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24 termwidth = win32.termwidth |
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25 testpid = win32.testpid |
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26 unlink = win32.unlink |
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27 |
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28 umask = 0022 |
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29 _SEEK_END = 2 # os.SEEK_END was introduced in Python 2.5 |
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30 |
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31 def posixfile(name, mode='r', buffering=-1): |
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32 '''Open a file with even more POSIX-like semantics''' |
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33 try: |
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34 fp = osutil.posixfile(name, mode, buffering) # may raise WindowsError |
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35 |
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36 # The position when opening in append mode is implementation defined, so |
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37 # make it consistent with other platforms, which position at EOF. |
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38 if 'a' in mode: |
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39 fp.seek(0, _SEEK_END) |
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40 |
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41 return fp |
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42 except WindowsError, err: |
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43 # convert to a friendlier exception |
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44 raise IOError(err.errno, '%s: %s' % (name, err.strerror)) |
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45 |
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46 class winstdout(object): |
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47 '''stdout on windows misbehaves if sent through a pipe''' |
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48 |
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49 def __init__(self, fp): |
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50 self.fp = fp |
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51 |
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52 def __getattr__(self, key): |
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53 return getattr(self.fp, key) |
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54 |
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55 def close(self): |
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56 try: |
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57 self.fp.close() |
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58 except IOError: |
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59 pass |
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60 |
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61 def write(self, s): |
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62 try: |
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63 # This is workaround for "Not enough space" error on |
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64 # writing large size of data to console. |
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65 limit = 16000 |
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66 l = len(s) |
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67 start = 0 |
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68 self.softspace = 0 |
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69 while start < l: |
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70 end = start + limit |
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71 self.fp.write(s[start:end]) |
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72 start = end |
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73 except IOError, inst: |
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74 if inst.errno != 0: |
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75 raise |
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76 self.close() |
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77 raise IOError(errno.EPIPE, 'Broken pipe') |
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78 |
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79 def flush(self): |
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80 try: |
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81 return self.fp.flush() |
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82 except IOError, inst: |
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83 if inst.errno != errno.EINVAL: |
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84 raise |
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85 self.close() |
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86 raise IOError(errno.EPIPE, 'Broken pipe') |
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87 |
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88 sys.__stdout__ = sys.stdout = winstdout(sys.stdout) |
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89 |
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90 def _is_win_9x(): |
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91 '''return true if run on windows 95, 98 or me.''' |
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92 try: |
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93 return sys.getwindowsversion()[3] == 1 |
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94 except AttributeError: |
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95 return 'command' in os.environ.get('comspec', '') |
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96 |
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97 def openhardlinks(): |
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98 return not _is_win_9x() |
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99 |
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100 def parsepatchoutput(output_line): |
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101 """parses the output produced by patch and returns the filename""" |
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102 pf = output_line[14:] |
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103 if pf[0] == '`': |
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104 pf = pf[1:-1] # Remove the quotes |
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105 return pf |
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106 |
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107 def sshargs(sshcmd, host, user, port): |
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108 '''Build argument list for ssh or Plink''' |
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109 pflag = 'plink' in sshcmd.lower() and '-P' or '-p' |
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110 args = user and ("%s@%s" % (user, host)) or host |
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111 return port and ("%s %s %s" % (args, pflag, port)) or args |
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112 |
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113 def setflags(f, l, x): |
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114 pass |
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115 |
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116 def copymode(src, dst, mode=None): |
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117 pass |
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118 |
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119 def checkexec(path): |
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120 return False |
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121 |
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122 def checklink(path): |
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123 return False |
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124 |
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125 def setbinary(fd): |
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126 # When run without console, pipes may expose invalid |
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127 # fileno(), usually set to -1. |
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128 fno = getattr(fd, 'fileno', None) |
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129 if fno is not None and fno() >= 0: |
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130 msvcrt.setmode(fno(), os.O_BINARY) |
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131 |
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132 def pconvert(path): |
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133 return path.replace(os.sep, '/') |
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134 |
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135 def localpath(path): |
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136 return path.replace('/', '\\') |
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137 |
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138 def normpath(path): |
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139 return pconvert(os.path.normpath(path)) |
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140 |
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141 def normcase(path): |
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142 return encoding.upper(path) |
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143 |
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144 # see posix.py for definitions |
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145 normcasespec = encoding.normcasespecs.upper |
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146 normcasefallback = encoding.upperfallback |
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147 |
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148 def samestat(s1, s2): |
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149 return False |
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150 |
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151 # A sequence of backslashes is special iff it precedes a double quote: |
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152 # - if there's an even number of backslashes, the double quote is not |
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153 # quoted (i.e. it ends the quoted region) |
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154 # - if there's an odd number of backslashes, the double quote is quoted |
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155 # - in both cases, every pair of backslashes is unquoted into a single |
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156 # backslash |
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157 # (See http://msdn2.microsoft.com/en-us/library/a1y7w461.aspx ) |
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158 # So, to quote a string, we must surround it in double quotes, double |
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160 # backslash before every double quote (being careful with the double |
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161 # quote we've appended to the end) |
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162 _quotere = None |
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163 _needsshellquote = None |
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164 def shellquote(s): |
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165 r""" |
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166 >>> shellquote(r'C:\Users\xyz') |
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167 '"C:\\Users\\xyz"' |
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168 >>> shellquote(r'C:\Users\xyz/mixed') |
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169 '"C:\\Users\\xyz/mixed"' |
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170 >>> # Would be safe not to quote too, since it is all double backslashes |
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171 >>> shellquote(r'C:\\Users\\xyz') |
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172 '"C:\\\\Users\\\\xyz"' |
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173 >>> # But this must be quoted |
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174 >>> shellquote(r'C:\\Users\\xyz/abc') |
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175 '"C:\\\\Users\\\\xyz/abc"' |
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176 """ |
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177 global _quotere |
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178 if _quotere is None: |
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179 _quotere = re.compile(r'(\\*)("|\\$)') |
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180 global _needsshellquote |
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181 if _needsshellquote is None: |
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182 # ":" is also treated as "safe character", because it is used as a part |
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183 # of path name on Windows. "\" is also part of a path name, but isn't |
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184 # safe because shlex.split() (kind of) treats it as an escape char and |
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185 # drops it. It will leave the next character, even if it is another |
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186 # "\". |
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187 _needsshellquote = re.compile(r'[^a-zA-Z0-9._:/-]').search |
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188 if s and not _needsshellquote(s) and not _quotere.search(s): |
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189 # "s" shouldn't have to be quoted |
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190 return s |
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191 return '"%s"' % _quotere.sub(r'\1\1\\\2', s) |
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192 |
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193 def quotecommand(cmd): |
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194 """Build a command string suitable for os.popen* calls.""" |
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195 if sys.version_info < (2, 7, 1): |
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196 # Python versions since 2.7.1 do this extra quoting themselves |
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197 return '"' + cmd + '"' |
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198 return cmd |
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199 |
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200 def popen(command, mode='r'): |
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201 # Work around "popen spawned process may not write to stdout |
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202 # under windows" |
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203 # http://bugs.python.org/issue1366 |
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204 command += " 2> %s" % os.devnull |
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205 return os.popen(quotecommand(command), mode) |
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206 |
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207 def explainexit(code): |
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208 return _("exited with status %d") % code, code |
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209 |
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210 # if you change this stub into a real check, please try to implement the |
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211 # username and groupname functions above, too. |
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212 def isowner(st): |
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213 return True |
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214 |
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215 def findexe(command): |
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216 '''Find executable for command searching like cmd.exe does. |
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217 If command is a basename then PATH is searched for command. |
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218 PATH isn't searched if command is an absolute or relative path. |
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219 An extension from PATHEXT is found and added if not present. |
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220 If command isn't found None is returned.''' |
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221 pathext = os.environ.get('PATHEXT', '.COM;.EXE;.BAT;.CMD') |
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222 pathexts = [ext for ext in pathext.lower().split(os.pathsep)] |
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223 if os.path.splitext(command)[1].lower() in pathexts: |
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224 pathexts = [''] |
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225 |
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226 def findexisting(pathcommand): |
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227 'Will append extension (if needed) and return existing file' |
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228 for ext in pathexts: |
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229 executable = pathcommand + ext |
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230 if os.path.exists(executable): |
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231 return executable |
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232 return None |
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233 |
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234 if os.sep in command: |
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235 return findexisting(command) |
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236 |
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237 for path in os.environ.get('PATH', '').split(os.pathsep): |
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238 executable = findexisting(os.path.join(path, command)) |
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239 if executable is not None: |
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240 return executable |
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241 return findexisting(os.path.expanduser(os.path.expandvars(command))) |
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242 |
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243 _wantedkinds = set([stat.S_IFREG, stat.S_IFLNK]) |
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244 |
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245 def statfiles(files): |
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246 '''Stat each file in files. Yield each stat, or None if a file |
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247 does not exist or has a type we don't care about. |
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248 |
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249 Cluster and cache stat per directory to minimize number of OS stat calls.''' |
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250 dircache = {} # dirname -> filename -> status | None if file does not exist |
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251 getkind = stat.S_IFMT |
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252 for nf in files: |
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253 nf = normcase(nf) |
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254 dir, base = os.path.split(nf) |
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255 if not dir: |
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256 dir = '.' |
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257 cache = dircache.get(dir, None) |
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258 if cache is None: |
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259 try: |
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260 dmap = dict([(normcase(n), s) |
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261 for n, k, s in osutil.listdir(dir, True) |
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262 if getkind(s.st_mode) in _wantedkinds]) |
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263 except OSError, err: |
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264 # handle directory not found in Python version prior to 2.5 |
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265 # Python <= 2.4 returns native Windows code 3 in errno |
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266 # Python >= 2.5 returns ENOENT and adds winerror field |
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267 # EINVAL is raised if dir is not a directory. |
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268 if err.errno not in (3, errno.ENOENT, errno.EINVAL, |
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269 errno.ENOTDIR): |
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270 raise |
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271 dmap = {} |
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272 cache = dircache.setdefault(dir, dmap) |
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273 yield cache.get(base, None) |
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274 |
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275 def username(uid=None): |
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276 """Return the name of the user with the given uid. |
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277 |
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278 If uid is None, return the name of the current user.""" |
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279 return None |
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280 |
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281 def groupname(gid=None): |
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282 """Return the name of the group with the given gid. |
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283 |
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284 If gid is None, return the name of the current group.""" |
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285 return None |
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286 |
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287 def removedirs(name): |
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288 """special version of os.removedirs that does not remove symlinked |
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289 directories or junction points if they actually contain files""" |
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290 if osutil.listdir(name): |
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291 return |
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292 os.rmdir(name) |
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293 head, tail = os.path.split(name) |
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294 if not tail: |
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295 head, tail = os.path.split(head) |
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296 while head and tail: |
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297 try: |
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298 if osutil.listdir(head): |
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299 return |
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300 os.rmdir(head) |
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eliminate various naked except clauses
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301 except (ValueError, OSError): |
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302 break |
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303 head, tail = os.path.split(head) |
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304 |
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305 def unlinkpath(f, ignoremissing=False): |
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306 """unlink and remove the directory if it is empty""" |
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307 try: |
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308 unlink(f) |
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309 except OSError, e: |
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310 if not (ignoremissing and e.errno == errno.ENOENT): |
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311 raise |
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312 # try removing directories that might now be empty |
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313 try: |
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314 removedirs(os.path.dirname(f)) |
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315 except OSError: |
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316 pass |
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317 |
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318 def rename(src, dst): |
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319 '''atomically rename file src to dst, replacing dst if it exists''' |
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320 try: |
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321 os.rename(src, dst) |
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322 except OSError, e: |
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323 if e.errno != errno.EEXIST: |
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324 raise |
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325 unlink(dst) |
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326 os.rename(src, dst) |
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327 |
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8e4be44a676f
Find right hg command for detached process
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328 def gethgcmd(): |
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329 return [sys.executable] + sys.argv[:1] |
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330 |
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99eee847beaa
acl: grp module is not available on windows
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331 def groupmembers(name): |
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332 # Don't support groups on Windows for now |
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333 raise KeyError |
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334 |
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335 def isexec(f): |
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336 return False |
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337 |
14927
2aa3e07b2f07
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338 class cachestat(object): |
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339 def __init__(self, path): |
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340 pass |
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341 |
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342 def cacheable(self): |
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343 return False |
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344 |
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345 def lookupreg(key, valname=None, scope=None): |
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346 ''' Look up a key/value name in the Windows registry. |
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347 |
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348 valname: value name. If unspecified, the default value for the key |
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349 is used. |
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350 scope: optionally specify scope for registry lookup, this can be |
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351 a sequence of scopes to look up in order. Default (CURRENT_USER, |
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352 LOCAL_MACHINE). |
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353 ''' |
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354 if scope is None: |
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355 scope = (_winreg.HKEY_CURRENT_USER, _winreg.HKEY_LOCAL_MACHINE) |
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356 elif not isinstance(scope, (list, tuple)): |
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357 scope = (scope,) |
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358 for s in scope: |
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359 try: |
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360 val = _winreg.QueryValueEx(_winreg.OpenKey(s, key), valname)[0] |
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361 # never let a Unicode string escape into the wild |
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362 return encoding.tolocal(val.encode('UTF-8')) |
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363 except EnvironmentError: |
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364 pass |
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365 |
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366 expandglobs = True |
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367 |
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368 def statislink(st): |
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369 '''check whether a stat result is a symlink''' |
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370 return False |
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371 |
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372 def statisexec(st): |
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373 '''check whether a stat result is an executable file''' |
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374 return False |
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375 |
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376 def readpipe(pipe): |
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377 """Read all available data from a pipe.""" |
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378 chunks = [] |
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379 while True: |
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380 size = win32.peekpipe(pipe) |
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381 if not size: |
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382 break |
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383 |
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384 s = pipe.read(size) |
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385 if not s: |
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386 break |
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387 chunks.append(s) |
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388 |
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389 return ''.join(chunks) |