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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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6 # GNU General Public License version 2, incorporated herein by reference.
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7
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8 from i18n import _
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9 import osutil, error
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10 import errno, msvcrt, os, re, sys
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11
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12 nulldev = 'NUL:'
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13 umask = 002
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14
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15 # wrap osutil.posixfile to provide friendlier exceptions
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16 def posixfile(name, mode='r', buffering=-1):
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17 try:
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18 return osutil.posixfile(name, mode, buffering)
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19 except WindowsError, err:
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20 raise IOError(err.errno, err.strerror)
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21 posixfile.__doc__ = osutil.posixfile.__doc__
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22
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23 class winstdout(object):
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24 '''stdout on windows misbehaves if sent through a pipe'''
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25
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26 def __init__(self, fp):
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27 self.fp = fp
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28
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29 def __getattr__(self, key):
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30 return getattr(self.fp, key)
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31
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32 def close(self):
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33 try:
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34 self.fp.close()
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35 except: pass
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36
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37 def write(self, s):
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38 try:
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39 # This is workaround for "Not enough space" error on
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40 # writing large size of data to console.
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41 limit = 16000
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42 l = len(s)
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43 start = 0
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44 self.softspace = 0;
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45 while start < l:
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46 end = start + limit
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47 self.fp.write(s[start:end])
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48 start = end
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49 except IOError, inst:
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50 if inst.errno != 0: raise
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51 self.close()
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52 raise IOError(errno.EPIPE, 'Broken pipe')
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53
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54 def flush(self):
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55 try:
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56 return self.fp.flush()
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57 except IOError, inst:
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58 if inst.errno != errno.EINVAL: raise
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59 self.close()
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60 raise IOError(errno.EPIPE, 'Broken pipe')
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61
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62 sys.stdout = winstdout(sys.stdout)
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63
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64 def _is_win_9x():
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65 '''return true if run on windows 95, 98 or me.'''
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66 try:
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67 return sys.getwindowsversion()[3] == 1
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68 except AttributeError:
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69 return 'command' in os.environ.get('comspec', '')
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70
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71 def openhardlinks():
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72 return not _is_win_9x() and "win32api" in globals()
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73
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74 def system_rcpath():
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75 try:
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76 return system_rcpath_win32()
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77 except:
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78 return [r'c:\mercurial\mercurial.ini']
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79
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80 def user_rcpath():
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81 '''return os-specific hgrc search path to the user dir'''
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82 try:
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83 path = user_rcpath_win32()
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84 except:
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85 home = os.path.expanduser('~')
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86 path = [os.path.join(home, 'mercurial.ini'),
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87 os.path.join(home, '.hgrc')]
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88 userprofile = os.environ.get('USERPROFILE')
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89 if userprofile:
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90 path.append(os.path.join(userprofile, 'mercurial.ini'))
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91 path.append(os.path.join(userprofile, '.hgrc'))
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92 return path
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93
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94 def parse_patch_output(output_line):
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95 """parses the output produced by patch and returns the filename"""
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96 pf = output_line[14:]
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97 if pf[0] == '`':
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98 pf = pf[1:-1] # Remove the quotes
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99 return pf
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100
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101 def sshargs(sshcmd, host, user, port):
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102 '''Build argument list for ssh or Plink'''
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103 pflag = 'plink' in sshcmd.lower() and '-P' or '-p'
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104 args = user and ("%s@%s" % (user, host)) or host
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105 return port and ("%s %s %s" % (args, pflag, port)) or args
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106
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107 def testpid(pid):
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108 '''return False if pid dead, True if running or not known'''
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109 return True
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110
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111 def set_flags(f, l, x):
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112 pass
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113
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114 def set_binary(fd):
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115 # When run without console, pipes may expose invalid
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116 # fileno(), usually set to -1.
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117 if hasattr(fd, 'fileno') and fd.fileno() >= 0:
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118 msvcrt.setmode(fd.fileno(), os.O_BINARY)
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119
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120 def pconvert(path):
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121 return '/'.join(path.split(os.sep))
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122
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123 def localpath(path):
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124 return path.replace('/', '\\')
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125
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126 def normpath(path):
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127 return pconvert(os.path.normpath(path))
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128
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129 def samestat(s1, s2):
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130 return False
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131
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132 # A sequence of backslashes is special iff it precedes a double quote:
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133 # - if there's an even number of backslashes, the double quote is not
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134 # quoted (i.e. it ends the quoted region)
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135 # - if there's an odd number of backslashes, the double quote is quoted
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136 # - in both cases, every pair of backslashes is unquoted into a single
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137 # backslash
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138 # (See http://msdn2.microsoft.com/en-us/library/a1y7w461.aspx )
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139 # So, to quote a string, we must surround it in double quotes, double
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140 # the number of backslashes that preceed double quotes and add another
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141 # backslash before every double quote (being careful with the double
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142 # quote we've appended to the end)
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143 _quotere = None
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144 def shellquote(s):
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145 global _quotere
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146 if _quotere is None:
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147 _quotere = re.compile(r'(\\*)("|\\$)')
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148 return '"%s"' % _quotere.sub(r'\1\1\\\2', s)
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149
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150 def quotecommand(cmd):
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151 """Build a command string suitable for os.popen* calls."""
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152 # The extra quotes are needed because popen* runs the command
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153 # through the current COMSPEC. cmd.exe suppress enclosing quotes.
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154 return '"' + cmd + '"'
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155
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156 def popen(command, mode='r'):
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157 # Work around "popen spawned process may not write to stdout
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158 # under windows"
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159 # http://bugs.python.org/issue1366
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160 command += " 2> %s" % nulldev
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161 return os.popen(quotecommand(command), mode)
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162
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163 def explain_exit(code):
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164 return _("exited with status %d") % code, code
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165
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166 # if you change this stub into a real check, please try to implement the
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167 # username and groupname functions above, too.
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168 def isowner(st):
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169 return True
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170
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171 def find_exe(command):
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172 '''Find executable for command searching like cmd.exe does.
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173 If command is a basename then PATH is searched for command.
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174 PATH isn't searched if command is an absolute or relative path.
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175 An extension from PATHEXT is found and added if not present.
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176 If command isn't found None is returned.'''
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177 pathext = os.environ.get('PATHEXT', '.COM;.EXE;.BAT;.CMD')
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178 pathexts = [ext for ext in pathext.lower().split(os.pathsep)]
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179 if os.path.splitext(command)[1].lower() in pathexts:
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180 pathexts = ['']
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181
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182 def findexisting(pathcommand):
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183 'Will append extension (if needed) and return existing file'
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184 for ext in pathexts:
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185 executable = pathcommand + ext
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186 if os.path.exists(executable):
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187 return executable
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188 return None
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189
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190 if os.sep in command:
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191 return findexisting(command)
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192
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193 for path in os.environ.get('PATH', '').split(os.pathsep):
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194 executable = findexisting(os.path.join(path, command))
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195 if executable is not None:
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196 return executable
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197 return None
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198
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199 def set_signal_handler():
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200 try:
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201 set_signal_handler_win32()
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202 except NameError:
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203 pass
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204
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205 def statfiles(files):
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206 '''Stat each file in files and yield stat or None if file does not exist.
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207 Cluster and cache stat per directory to minimize number of OS stat calls.'''
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208 ncase = os.path.normcase
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209 sep = os.sep
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210 dircache = {} # dirname -> filename -> status | None if file does not exist
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211 for nf in files:
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212 nf = ncase(nf)
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213 dir, base = os.path.split(nf)
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214 if not dir:
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215 dir = '.'
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216 cache = dircache.get(dir, None)
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217 if cache is None:
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218 try:
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219 dmap = dict([(ncase(n), s)
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220 for n, k, s in osutil.listdir(dir, True)])
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221 except OSError, err:
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222 # handle directory not found in Python version prior to 2.5
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223 # Python <= 2.4 returns native Windows code 3 in errno
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224 # Python >= 2.5 returns ENOENT and adds winerror field
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225 # EINVAL is raised if dir is not a directory.
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226 if err.errno not in (3, errno.ENOENT, errno.EINVAL,
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227 errno.ENOTDIR):
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228 raise
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229 dmap = {}
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230 cache = dircache.setdefault(dir, dmap)
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231 yield cache.get(base, None)
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232
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233 def getuser():
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234 '''return name of current user'''
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235 raise error.Abort(_('user name not available - set USERNAME '
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236 'environment variable'))
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237
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238 def username(uid=None):
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239 """Return the name of the user with the given uid.
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240
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241 If uid is None, return the name of the current user."""
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242 return None
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243
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244 def groupname(gid=None):
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245 """Return the name of the group with the given gid.
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246
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247 If gid is None, return the name of the current group."""
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248 return None
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249
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250 def _removedirs(name):
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251 """special version of os.removedirs that does not remove symlinked
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252 directories or junction points if they actually contain files"""
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253 if osutil.listdir(name):
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254 return
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255 os.rmdir(name)
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256 head, tail = os.path.split(name)
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257 if not tail:
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258 head, tail = os.path.split(head)
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259 while head and tail:
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260 try:
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261 if osutil.listdir(name):
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262 return
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263 os.rmdir(head)
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264 except:
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265 break
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266 head, tail = os.path.split(head)
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267
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268 def unlink(f):
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269 """unlink and remove the directory if it is empty"""
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270 os.unlink(f)
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271 # try removing directories that might now be empty
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272 try:
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273 _removedirs(os.path.dirname(f))
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274 except OSError:
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275 pass
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276
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277 try:
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278 # override functions with win32 versions if possible
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279 from win32 import *
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280 except ImportError:
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281 pass
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282
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283 expandglobs = True
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