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1 | 1 | # win32.py - utility functions that use win32 API |
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2 | 2 | # |
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3 | 3 | # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | """Utility functions that use win32 API. |
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9 | 9 | |
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10 | 10 | Mark Hammond's win32all package allows better functionality on |
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11 | 11 | Windows. This module overrides definitions in util.py. If not |
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12 | 12 | available, import of this module will fail, and generic code will be |
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13 | 13 | used. |
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14 | 14 | """ |
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15 | 15 | |
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16 | 16 | import win32api |
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17 | 17 | |
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18 | 18 | import errno, os, sys, pywintypes, win32con, win32file, win32process |
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19 | 19 | import winerror, win32gui, win32console |
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20 | 20 | import osutil, encoding |
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21 | 21 | from win32com.shell import shell, shellcon |
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22 | 22 | |
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23 | 23 | def os_link(src, dst): |
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24 | 24 | try: |
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25 | 25 | win32file.CreateHardLink(dst, src) |
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26 | # CreateHardLink sometimes succeeds on mapped drives but | |
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27 | # following nlinks() returns 1. Check it now and bail out. | |
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28 | if nlinks(src) < 2: | |
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29 | try: | |
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30 | win32file.DeleteFile(dst) | |
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31 | except: | |
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32 | pass | |
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33 | # Fake hardlinking error | |
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34 | raise OSError(errno.EINVAL, 'Hardlinking not supported') | |
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35 | 26 | except pywintypes.error: |
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36 | 27 | raise OSError(errno.EINVAL, 'target implements hardlinks improperly') |
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37 | 28 | except NotImplementedError: # Another fake error win Win98 |
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38 | 29 | raise OSError(errno.EINVAL, 'Hardlinking not supported') |
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39 | 30 | |
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40 | 31 | def _getfileinfo(pathname): |
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41 | 32 | """Return number of hardlinks for the given file.""" |
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42 | 33 | try: |
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43 | 34 | fh = win32file.CreateFile(pathname, |
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44 | 35 | win32file.GENERIC_READ, win32file.FILE_SHARE_READ, |
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45 | 36 | None, win32file.OPEN_EXISTING, 0, None) |
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46 | 37 | try: |
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47 | 38 | return win32file.GetFileInformationByHandle(fh) |
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48 | 39 | finally: |
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49 | 40 | fh.Close() |
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50 | 41 | except pywintypes.error: |
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51 | 42 | return None |
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52 | 43 | |
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53 | 44 | def nlinks(pathname): |
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54 | 45 | """Return number of hardlinks for the given file.""" |
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55 | 46 | res = _getfileinfo(pathname) |
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56 | 47 | if res is not None: |
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57 |
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48 | links = res[7] | |
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58 | 49 | else: |
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59 |
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50 | links = os.lstat(pathname).st_nlink | |
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51 | if links < 2: | |
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52 | # Known to be wrong for most network drives | |
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53 | dirname = os.path.dirname(pathname) | |
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54 | if not dirname: | |
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55 | dirname = '.' | |
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56 | dt = win32file.GetDriveType(dirname + '\\') | |
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57 | if dt == 4 or dt == 1: | |
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58 | # Fake hardlink to force COW for network drives | |
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59 | links = 2 | |
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60 | return links | |
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60 | 61 | |
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61 | 62 | def samefile(fpath1, fpath2): |
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62 | 63 | """Returns whether fpath1 and fpath2 refer to the same file. This is only |
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63 | 64 | guaranteed to work for files, not directories.""" |
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64 | 65 | res1 = _getfileinfo(fpath1) |
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65 | 66 | res2 = _getfileinfo(fpath2) |
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66 | 67 | if res1 is not None and res2 is not None: |
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67 | 68 | # Index 4 is the volume serial number, and 8 and 9 contain the file ID |
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68 | 69 | return res1[4] == res2[4] and res1[8] == res2[8] and res1[9] == res2[9] |
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69 | 70 | else: |
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70 | 71 | return False |
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71 | 72 | |
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72 | 73 | def samedevice(fpath1, fpath2): |
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73 | 74 | """Returns whether fpath1 and fpath2 are on the same device. This is only |
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74 | 75 | guaranteed to work for files, not directories.""" |
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75 | 76 | res1 = _getfileinfo(fpath1) |
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76 | 77 | res2 = _getfileinfo(fpath2) |
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77 | 78 | if res1 is not None and res2 is not None: |
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78 | 79 | return res1[4] == res2[4] |
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79 | 80 | else: |
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80 | 81 | return False |
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81 | 82 | |
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82 | 83 | def testpid(pid): |
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83 | 84 | '''return True if pid is still running or unable to |
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84 | 85 | determine, False otherwise''' |
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85 | 86 | try: |
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86 | 87 | handle = win32api.OpenProcess( |
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87 | 88 | win32con.PROCESS_QUERY_INFORMATION, False, pid) |
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88 | 89 | if handle: |
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89 | 90 | status = win32process.GetExitCodeProcess(handle) |
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90 | 91 | return status == win32con.STILL_ACTIVE |
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91 | 92 | except pywintypes.error, details: |
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92 | 93 | return details[0] != winerror.ERROR_INVALID_PARAMETER |
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93 | 94 | return True |
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94 | 95 | |
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95 | 96 | def lookup_reg(key, valname=None, scope=None): |
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96 | 97 | ''' Look up a key/value name in the Windows registry. |
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97 | 98 | |
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98 | 99 | valname: value name. If unspecified, the default value for the key |
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99 | 100 | is used. |
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100 | 101 | scope: optionally specify scope for registry lookup, this can be |
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101 | 102 | a sequence of scopes to look up in order. Default (CURRENT_USER, |
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102 | 103 | LOCAL_MACHINE). |
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103 | 104 | ''' |
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104 | 105 | try: |
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105 | 106 | from _winreg import HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, \ |
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106 | 107 | QueryValueEx, OpenKey |
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107 | 108 | except ImportError: |
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108 | 109 | return None |
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109 | 110 | |
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110 | 111 | if scope is None: |
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111 | 112 | scope = (HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE) |
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112 | 113 | elif not isinstance(scope, (list, tuple)): |
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113 | 114 | scope = (scope,) |
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114 | 115 | for s in scope: |
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115 | 116 | try: |
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116 | 117 | val = QueryValueEx(OpenKey(s, key), valname)[0] |
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117 | 118 | # never let a Unicode string escape into the wild |
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118 | 119 | return encoding.tolocal(val.encode('UTF-8')) |
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119 | 120 | except EnvironmentError: |
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120 | 121 | pass |
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121 | 122 | |
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122 | 123 | def system_rcpath_win32(): |
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123 | 124 | '''return default os-specific hgrc search path''' |
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124 | 125 | proc = win32api.GetCurrentProcess() |
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125 | 126 | try: |
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126 | 127 | # This will fail on windows < NT |
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127 | 128 | filename = win32process.GetModuleFileNameEx(proc, 0) |
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128 | 129 | except: |
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129 | 130 | filename = win32api.GetModuleFileName(0) |
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130 | 131 | # Use mercurial.ini found in directory with hg.exe |
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131 | 132 | progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini') |
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132 | 133 | if os.path.isfile(progrc): |
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133 | 134 | return [progrc] |
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134 | 135 | # Use hgrc.d found in directory with hg.exe |
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135 | 136 | progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d') |
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136 | 137 | if os.path.isdir(progrcd): |
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137 | 138 | rcpath = [] |
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138 | 139 | for f, kind in osutil.listdir(progrcd): |
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139 | 140 | if f.endswith('.rc'): |
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140 | 141 | rcpath.append(os.path.join(progrcd, f)) |
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141 | 142 | return rcpath |
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142 | 143 | # else look for a system rcpath in the registry |
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143 | 144 | try: |
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144 | 145 | value = win32api.RegQueryValue( |
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145 | 146 | win32con.HKEY_LOCAL_MACHINE, 'SOFTWARE\\Mercurial') |
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146 | 147 | rcpath = [] |
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147 | 148 | for p in value.split(os.pathsep): |
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148 | 149 | if p.lower().endswith('mercurial.ini'): |
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149 | 150 | rcpath.append(p) |
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150 | 151 | elif os.path.isdir(p): |
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151 | 152 | for f, kind in osutil.listdir(p): |
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152 | 153 | if f.endswith('.rc'): |
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153 | 154 | rcpath.append(os.path.join(p, f)) |
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154 | 155 | return rcpath |
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155 | 156 | except pywintypes.error: |
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156 | 157 | return [] |
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157 | 158 | |
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158 | 159 | def user_rcpath_win32(): |
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159 | 160 | '''return os-specific hgrc search path to the user dir''' |
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160 | 161 | userdir = os.path.expanduser('~') |
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161 | 162 | if sys.getwindowsversion()[3] != 2 and userdir == '~': |
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162 | 163 | # We are on win < nt: fetch the APPDATA directory location and use |
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163 | 164 | # the parent directory as the user home dir. |
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164 | 165 | appdir = shell.SHGetPathFromIDList( |
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165 | 166 | shell.SHGetSpecialFolderLocation(0, shellcon.CSIDL_APPDATA)) |
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166 | 167 | userdir = os.path.dirname(appdir) |
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167 | 168 | return [os.path.join(userdir, 'mercurial.ini'), |
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168 | 169 | os.path.join(userdir, '.hgrc')] |
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169 | 170 | |
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170 | 171 | def getuser(): |
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171 | 172 | '''return name of current user''' |
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172 | 173 | return win32api.GetUserName() |
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173 | 174 | |
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174 | 175 | def set_signal_handler_win32(): |
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175 | 176 | """Register a termination handler for console events including |
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176 | 177 | CTRL+C. python signal handlers do not work well with socket |
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177 | 178 | operations. |
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178 | 179 | """ |
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179 | 180 | def handler(event): |
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180 | 181 | win32process.ExitProcess(1) |
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181 | 182 | win32api.SetConsoleCtrlHandler(handler) |
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182 | 183 | |
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183 | 184 | def hidewindow(): |
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184 | 185 | def callback(*args, **kwargs): |
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185 | 186 | hwnd, pid = args |
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186 | 187 | wpid = win32process.GetWindowThreadProcessId(hwnd)[1] |
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187 | 188 | if pid == wpid: |
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188 | 189 | win32gui.ShowWindow(hwnd, win32con.SW_HIDE) |
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189 | 190 | |
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190 | 191 | pid = win32process.GetCurrentProcessId() |
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191 | 192 | win32gui.EnumWindows(callback, pid) |
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192 | 193 | |
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193 | 194 | def termwidth_(): |
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194 | 195 | try: |
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195 | 196 | # Query stderr to avoid problems with redirections |
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196 | 197 | screenbuf = win32console.GetStdHandle(win32console.STD_ERROR_HANDLE) |
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197 | 198 | try: |
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198 | 199 | window = screenbuf.GetConsoleScreenBufferInfo()['Window'] |
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199 | 200 | width = window.Right - window.Left |
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200 | 201 | return width |
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201 | 202 | finally: |
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202 | 203 | screenbuf.Detach() |
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203 | 204 | except pywintypes.error: |
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204 | 205 | return 79 |
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