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@@ -1,580 +1,581 b'' | |||
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1 | 1 | # encoding: utf-8 |
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2 | 2 | """ |
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3 | 3 | Utilities for path handling. |
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4 | 4 | """ |
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5 | 5 | |
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6 | 6 | # Copyright (c) IPython Development Team. |
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7 | 7 | # Distributed under the terms of the Modified BSD License. |
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8 | 8 | |
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9 | 9 | import os |
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10 | 10 | import sys |
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11 | 11 | import errno |
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12 | 12 | import shutil |
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13 | 13 | import random |
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14 | 14 | import tempfile |
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15 | 15 | import warnings |
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16 | 16 | from hashlib import md5 |
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17 | 17 | import glob |
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18 | 18 | |
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19 | 19 | import IPython |
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20 | 20 | from IPython.testing.skipdoctest import skip_doctest |
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21 | 21 | from IPython.utils.process import system |
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22 | 22 | from IPython.utils.importstring import import_item |
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23 | 23 | from IPython.utils import py3compat |
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24 | 24 | #----------------------------------------------------------------------------- |
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25 | 25 | # Code |
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26 | 26 | #----------------------------------------------------------------------------- |
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27 | 27 | |
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28 | 28 | fs_encoding = sys.getfilesystemencoding() |
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29 | 29 | |
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30 | 30 | def _get_long_path_name(path): |
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31 | 31 | """Dummy no-op.""" |
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32 | 32 | return path |
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33 | 33 | |
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34 | 34 | def _writable_dir(path): |
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35 | 35 | """Whether `path` is a directory, to which the user has write access.""" |
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36 | 36 | return os.path.isdir(path) and os.access(path, os.W_OK) |
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37 | 37 | |
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38 | 38 | if sys.platform == 'win32': |
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39 | 39 | @skip_doctest |
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40 | 40 | def _get_long_path_name(path): |
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41 | 41 | """Get a long path name (expand ~) on Windows using ctypes. |
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42 | 42 | |
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43 | 43 | Examples |
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44 | 44 | -------- |
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45 | 45 | |
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46 | 46 | >>> get_long_path_name('c:\\docume~1') |
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47 | 47 | u'c:\\\\Documents and Settings' |
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48 | 48 | |
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49 | 49 | """ |
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50 | 50 | try: |
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51 | 51 | import ctypes |
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52 | 52 | except ImportError: |
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53 | 53 | raise ImportError('you need to have ctypes installed for this to work') |
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54 | 54 | _GetLongPathName = ctypes.windll.kernel32.GetLongPathNameW |
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55 | 55 | _GetLongPathName.argtypes = [ctypes.c_wchar_p, ctypes.c_wchar_p, |
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56 | 56 | ctypes.c_uint ] |
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57 | 57 | |
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58 | 58 | buf = ctypes.create_unicode_buffer(260) |
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59 | 59 | rv = _GetLongPathName(path, buf, 260) |
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60 | 60 | if rv == 0 or rv > 260: |
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61 | 61 | return path |
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62 | 62 | else: |
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63 | 63 | return buf.value |
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64 | 64 | |
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65 | 65 | |
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66 | 66 | def get_long_path_name(path): |
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67 | 67 | """Expand a path into its long form. |
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68 | 68 | |
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69 | 69 | On Windows this expands any ~ in the paths. On other platforms, it is |
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70 | 70 | a null operation. |
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71 | 71 | """ |
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72 | 72 | return _get_long_path_name(path) |
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73 | 73 | |
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74 | 74 | |
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75 | 75 | def unquote_filename(name, win32=(sys.platform=='win32')): |
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76 | 76 | """ On Windows, remove leading and trailing quotes from filenames. |
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77 | 77 | """ |
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78 | 78 | if win32: |
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79 | 79 | if name.startswith(("'", '"')) and name.endswith(("'", '"')): |
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80 | 80 | name = name[1:-1] |
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81 | 81 | return name |
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82 | 82 | |
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83 | 83 | def compress_user(path): |
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84 | 84 | """Reverse of :func:`os.path.expanduser` |
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85 | 85 | """ |
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86 | 86 | home = os.path.expanduser('~') |
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87 | 87 | if path.startswith(home): |
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88 | 88 | path = "~" + path[len(home):] |
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89 | 89 | return path |
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90 | 90 | |
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91 | 91 | def get_py_filename(name, force_win32=None): |
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92 | 92 | """Return a valid python filename in the current directory. |
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93 | 93 | |
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94 | 94 | If the given name is not a file, it adds '.py' and searches again. |
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95 | 95 | Raises IOError with an informative message if the file isn't found. |
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96 | 96 | |
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97 | 97 | On Windows, apply Windows semantics to the filename. In particular, remove |
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98 | 98 | any quoting that has been applied to it. This option can be forced for |
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99 | 99 | testing purposes. |
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100 | 100 | """ |
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101 | 101 | |
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102 | 102 | name = os.path.expanduser(name) |
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103 | 103 | if force_win32 is None: |
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104 | 104 | win32 = (sys.platform == 'win32') |
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105 | 105 | else: |
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106 | 106 | win32 = force_win32 |
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107 | 107 | name = unquote_filename(name, win32=win32) |
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108 | 108 | if not os.path.isfile(name) and not name.endswith('.py'): |
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109 | 109 | name += '.py' |
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110 | 110 | if os.path.isfile(name): |
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111 | 111 | return name |
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112 | 112 | else: |
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113 | 113 | raise IOError('File `%r` not found.' % name) |
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114 | 114 | |
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115 | 115 | |
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116 | 116 | def filefind(filename, path_dirs=None): |
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117 | 117 | """Find a file by looking through a sequence of paths. |
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118 | 118 | |
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119 | 119 | This iterates through a sequence of paths looking for a file and returns |
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120 | 120 | the full, absolute path of the first occurence of the file. If no set of |
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121 | 121 | path dirs is given, the filename is tested as is, after running through |
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122 | 122 | :func:`expandvars` and :func:`expanduser`. Thus a simple call:: |
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123 | 123 | |
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124 | 124 | filefind('myfile.txt') |
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125 | 125 | |
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126 | 126 | will find the file in the current working dir, but:: |
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127 | 127 | |
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128 | 128 | filefind('~/myfile.txt') |
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129 | 129 | |
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130 | 130 | Will find the file in the users home directory. This function does not |
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131 | 131 | automatically try any paths, such as the cwd or the user's home directory. |
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132 | 132 | |
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133 | 133 | Parameters |
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134 | 134 | ---------- |
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135 | 135 | filename : str |
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136 | 136 | The filename to look for. |
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137 | 137 | path_dirs : str, None or sequence of str |
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138 | 138 | The sequence of paths to look for the file in. If None, the filename |
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139 | 139 | need to be absolute or be in the cwd. If a string, the string is |
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140 | 140 | put into a sequence and the searched. If a sequence, walk through |
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141 | 141 | each element and join with ``filename``, calling :func:`expandvars` |
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142 | 142 | and :func:`expanduser` before testing for existence. |
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143 | 143 | |
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144 | 144 | Returns |
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145 | 145 | ------- |
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146 | 146 | Raises :exc:`IOError` or returns absolute path to file. |
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147 | 147 | """ |
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148 | 148 | |
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149 | 149 | # If paths are quoted, abspath gets confused, strip them... |
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150 | 150 | filename = filename.strip('"').strip("'") |
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151 | 151 | # If the input is an absolute path, just check it exists |
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152 | 152 | if os.path.isabs(filename) and os.path.isfile(filename): |
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153 | 153 | return filename |
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154 | 154 | |
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155 | 155 | if path_dirs is None: |
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156 | 156 | path_dirs = ("",) |
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157 | 157 | elif isinstance(path_dirs, py3compat.string_types): |
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158 | 158 | path_dirs = (path_dirs,) |
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159 | 159 | |
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160 | 160 | for path in path_dirs: |
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161 | 161 | if path == '.': path = py3compat.getcwd() |
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162 | 162 | testname = expand_path(os.path.join(path, filename)) |
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163 | 163 | if os.path.isfile(testname): |
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164 | 164 | return os.path.abspath(testname) |
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165 | 165 | |
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166 | 166 | raise IOError("File %r does not exist in any of the search paths: %r" % |
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167 | 167 | (filename, path_dirs) ) |
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168 | 168 | |
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169 | 169 | |
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170 | 170 | class HomeDirError(Exception): |
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171 | 171 | pass |
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172 | 172 | |
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173 | 173 | |
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174 | 174 | def get_home_dir(require_writable=False): |
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175 | 175 | """Return the 'home' directory, as a unicode string. |
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176 | 176 | |
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177 | 177 | Uses os.path.expanduser('~'), and checks for writability. |
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178 | 178 | |
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179 | 179 | See stdlib docs for how this is determined. |
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180 | 180 | $HOME is first priority on *ALL* platforms. |
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181 | 181 | |
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182 | 182 | Parameters |
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183 | 183 | ---------- |
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184 | 184 | |
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185 | 185 | require_writable : bool [default: False] |
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186 | 186 | if True: |
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187 | 187 | guarantees the return value is a writable directory, otherwise |
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188 | 188 | raises HomeDirError |
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189 | 189 | if False: |
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190 | 190 | The path is resolved, but it is not guaranteed to exist or be writable. |
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191 | 191 | """ |
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192 | 192 | |
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193 | 193 | homedir = os.path.expanduser('~') |
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194 | 194 | # Next line will make things work even when /home/ is a symlink to |
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195 | 195 | # /usr/home as it is on FreeBSD, for example |
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196 | 196 | homedir = os.path.realpath(homedir) |
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197 | 197 | |
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198 | 198 | if not _writable_dir(homedir) and os.name == 'nt': |
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199 | 199 | # expanduser failed, use the registry to get the 'My Documents' folder. |
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200 | 200 | try: |
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201 | 201 | try: |
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202 | 202 | import winreg as wreg # Py 3 |
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203 | 203 | except ImportError: |
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204 | 204 | import _winreg as wreg # Py 2 |
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205 | 205 | key = wreg.OpenKey( |
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206 | 206 | wreg.HKEY_CURRENT_USER, |
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207 | 207 | "Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" |
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208 | 208 | ) |
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209 | 209 | homedir = wreg.QueryValueEx(key,'Personal')[0] |
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210 | 210 | key.Close() |
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211 | 211 | except: |
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212 | 212 | pass |
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213 | 213 | |
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214 | 214 | if (not require_writable) or _writable_dir(homedir): |
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215 | 215 | return py3compat.cast_unicode(homedir, fs_encoding) |
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216 | 216 | else: |
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217 | 217 | raise HomeDirError('%s is not a writable dir, ' |
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218 | 218 | 'set $HOME environment variable to override' % homedir) |
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219 | 219 | |
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220 | 220 | def get_xdg_dir(): |
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221 | 221 | """Return the XDG_CONFIG_HOME, if it is defined and exists, else None. |
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222 | 222 | |
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223 | 223 | This is only for non-OS X posix (Linux,Unix,etc.) systems. |
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224 | 224 | """ |
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225 | 225 | |
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226 | 226 | env = os.environ |
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227 | 227 | |
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228 | 228 | if os.name == 'posix' and sys.platform != 'darwin': |
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229 | 229 | # Linux, Unix, AIX, etc. |
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230 | 230 | # use ~/.config if empty OR not set |
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231 | 231 | xdg = env.get("XDG_CONFIG_HOME", None) or os.path.join(get_home_dir(), '.config') |
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232 | 232 | if xdg and _writable_dir(xdg): |
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233 | 233 | return py3compat.cast_unicode(xdg, fs_encoding) |
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234 | 234 | |
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235 | 235 | return None |
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236 | 236 | |
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237 | 237 | |
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238 | 238 | def get_xdg_cache_dir(): |
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239 | 239 | """Return the XDG_CACHE_HOME, if it is defined and exists, else None. |
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240 | 240 | |
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241 | 241 | This is only for non-OS X posix (Linux,Unix,etc.) systems. |
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242 | 242 | """ |
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243 | 243 | |
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244 | 244 | env = os.environ |
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245 | 245 | |
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246 | 246 | if os.name == 'posix' and sys.platform != 'darwin': |
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247 | 247 | # Linux, Unix, AIX, etc. |
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248 | 248 | # use ~/.cache if empty OR not set |
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249 | 249 | xdg = env.get("XDG_CACHE_HOME", None) or os.path.join(get_home_dir(), '.cache') |
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250 | 250 | if xdg and _writable_dir(xdg): |
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251 | 251 | return py3compat.cast_unicode(xdg, fs_encoding) |
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252 | 252 | |
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253 | 253 | return None |
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254 | 254 | |
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255 | 255 | |
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256 | 256 | def get_ipython_dir(): |
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257 | 257 | """Get the IPython directory for this platform and user. |
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258 | 258 | |
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259 | 259 | This uses the logic in `get_home_dir` to find the home directory |
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260 | 260 | and then adds .ipython to the end of the path. |
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261 | 261 | """ |
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262 | 262 | |
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263 | 263 | env = os.environ |
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264 | 264 | pjoin = os.path.join |
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265 | 265 | |
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266 | 266 | |
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267 | 267 | ipdir_def = '.ipython' |
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268 | 268 | |
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269 | 269 | home_dir = get_home_dir() |
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270 | 270 | xdg_dir = get_xdg_dir() |
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271 | 271 | |
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272 | 272 | # import pdb; pdb.set_trace() # dbg |
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273 | 273 | if 'IPYTHON_DIR' in env: |
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274 | 274 | warnings.warn('The environment variable IPYTHON_DIR is deprecated. ' |
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275 | 275 | 'Please use IPYTHONDIR instead.') |
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276 | 276 | ipdir = env.get('IPYTHONDIR', env.get('IPYTHON_DIR', None)) |
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277 | 277 | if ipdir is None: |
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278 | 278 | # not set explicitly, use ~/.ipython |
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279 | 279 | ipdir = pjoin(home_dir, ipdir_def) |
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280 | 280 | if xdg_dir: |
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281 | 281 | # Several IPython versions (up to 1.x) defaulted to .config/ipython |
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282 | 282 | # on Linux. We have decided to go back to using .ipython everywhere |
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283 | 283 | xdg_ipdir = pjoin(xdg_dir, 'ipython') |
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284 | 284 | |
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285 | 285 | if _writable_dir(xdg_ipdir): |
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286 | 286 | cu = compress_user |
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287 | 287 | if os.path.exists(ipdir): |
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288 | 288 | warnings.warn(('Ignoring {0} in favour of {1}. Remove {0} ' |
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289 | 289 | 'to get rid of this message').format(cu(xdg_ipdir), cu(ipdir))) |
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290 | 290 | else: |
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291 | 291 | warnings.warn('Moving {0} to {1}'.format(cu(xdg_ipdir), cu(ipdir))) |
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292 | 292 | os.rename(xdg_ipdir, ipdir) |
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293 | 293 | |
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294 | 294 | ipdir = os.path.normpath(os.path.expanduser(ipdir)) |
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295 | 295 | |
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296 | 296 | if os.path.exists(ipdir) and not _writable_dir(ipdir): |
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297 | 297 | # ipdir exists, but is not writable |
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298 | 298 | warnings.warn("IPython dir '%s' is not a writable location," |
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299 | 299 | " using a temp directory."%ipdir) |
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300 | 300 | ipdir = tempfile.mkdtemp() |
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301 | 301 | elif not os.path.exists(ipdir): |
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302 | 302 | parent = os.path.dirname(ipdir) |
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303 | 303 | if not _writable_dir(parent): |
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304 | 304 | # ipdir does not exist and parent isn't writable |
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305 | 305 | warnings.warn("IPython parent '%s' is not a writable location," |
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306 | 306 | " using a temp directory."%parent) |
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307 | 307 | ipdir = tempfile.mkdtemp() |
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308 | 308 | |
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309 | 309 | return py3compat.cast_unicode(ipdir, fs_encoding) |
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310 | 310 | |
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311 | 311 | |
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312 | 312 | def get_ipython_cache_dir(): |
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313 | 313 | """Get the cache directory it is created if it does not exist.""" |
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314 | 314 | xdgdir = get_xdg_cache_dir() |
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315 | 315 | if xdgdir is None: |
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316 | 316 | return get_ipython_dir() |
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317 | 317 | ipdir = os.path.join(xdgdir, "ipython") |
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318 | 318 | if not os.path.exists(ipdir) and _writable_dir(xdgdir): |
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319 | 319 | ensure_dir_exists(ipdir) |
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320 | 320 | elif not _writable_dir(xdgdir): |
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321 | 321 | return get_ipython_dir() |
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322 | 322 | |
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323 | 323 | return py3compat.cast_unicode(ipdir, fs_encoding) |
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324 | 324 | |
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325 | 325 | |
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326 | 326 | def get_ipython_package_dir(): |
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327 | 327 | """Get the base directory where IPython itself is installed.""" |
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328 | 328 | ipdir = os.path.dirname(IPython.__file__) |
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329 | 329 | return py3compat.cast_unicode(ipdir, fs_encoding) |
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330 | 330 | |
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331 | 331 | |
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332 | 332 | def get_ipython_module_path(module_str): |
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333 | 333 | """Find the path to an IPython module in this version of IPython. |
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334 | 334 | |
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335 | 335 | This will always find the version of the module that is in this importable |
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336 | 336 | IPython package. This will always return the path to the ``.py`` |
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337 | 337 | version of the module. |
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338 | 338 | """ |
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339 | 339 | if module_str == 'IPython': |
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340 | 340 | return os.path.join(get_ipython_package_dir(), '__init__.py') |
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341 | 341 | mod = import_item(module_str) |
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342 | 342 | the_path = mod.__file__.replace('.pyc', '.py') |
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343 | 343 | the_path = the_path.replace('.pyo', '.py') |
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344 | 344 | return py3compat.cast_unicode(the_path, fs_encoding) |
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345 | 345 | |
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346 | 346 | def locate_profile(profile='default'): |
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347 | 347 | """Find the path to the folder associated with a given profile. |
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348 | 348 | |
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349 | 349 | I.e. find $IPYTHONDIR/profile_whatever. |
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350 | 350 | """ |
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351 | 351 | from IPython.core.profiledir import ProfileDir, ProfileDirError |
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352 | 352 | try: |
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353 | 353 | pd = ProfileDir.find_profile_dir_by_name(get_ipython_dir(), profile) |
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354 | 354 | except ProfileDirError: |
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355 | 355 | # IOError makes more sense when people are expecting a path |
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356 | 356 | raise IOError("Couldn't find profile %r" % profile) |
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357 | 357 | return pd.location |
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358 | 358 | |
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359 | 359 | def expand_path(s): |
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360 | 360 | """Expand $VARS and ~names in a string, like a shell |
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361 | 361 | |
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362 | 362 | :Examples: |
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363 | 363 | |
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364 | 364 | In [2]: os.environ['FOO']='test' |
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365 | 365 | |
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366 | 366 | In [3]: expand_path('variable FOO is $FOO') |
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367 | 367 | Out[3]: 'variable FOO is test' |
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368 | 368 | """ |
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369 | 369 | # This is a pretty subtle hack. When expand user is given a UNC path |
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370 | 370 | # on Windows (\\server\share$\%username%), os.path.expandvars, removes |
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371 | 371 | # the $ to get (\\server\share\%username%). I think it considered $ |
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372 | 372 | # alone an empty var. But, we need the $ to remains there (it indicates |
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373 | 373 | # a hidden share). |
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374 | 374 | if os.name=='nt': |
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375 | 375 | s = s.replace('$\\', 'IPYTHON_TEMP') |
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376 | 376 | s = os.path.expandvars(os.path.expanduser(s)) |
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377 | 377 | if os.name=='nt': |
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378 | 378 | s = s.replace('IPYTHON_TEMP', '$\\') |
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379 | 379 | return s |
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380 | 380 | |
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381 | 381 | |
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382 | 382 | def unescape_glob(string): |
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383 | 383 | """Unescape glob pattern in `string`.""" |
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384 | 384 | def unescape(s): |
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385 | 385 | for pattern in '*[]!?': |
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386 | 386 | s = s.replace(r'\{0}'.format(pattern), pattern) |
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387 | 387 | return s |
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388 | 388 | return '\\'.join(map(unescape, string.split('\\\\'))) |
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389 | 389 | |
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390 | 390 | |
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391 | 391 | def shellglob(args): |
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392 | 392 | """ |
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393 | 393 | Do glob expansion for each element in `args` and return a flattened list. |
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394 | 394 | |
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395 | 395 | Unmatched glob pattern will remain as-is in the returned list. |
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396 | 396 | |
|
397 | 397 | """ |
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398 | 398 | expanded = [] |
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399 | 399 | # Do not unescape backslash in Windows as it is interpreted as |
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400 | 400 | # path separator: |
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401 | 401 | unescape = unescape_glob if sys.platform != 'win32' else lambda x: x |
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402 | 402 | for a in args: |
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403 | 403 | expanded.extend(glob.glob(a) or [unescape(a)]) |
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404 | 404 | return expanded |
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405 | 405 | |
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406 | 406 | |
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407 | 407 | def target_outdated(target,deps): |
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408 | 408 | """Determine whether a target is out of date. |
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409 | 409 | |
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410 | 410 | target_outdated(target,deps) -> 1/0 |
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411 | 411 | |
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412 | 412 | deps: list of filenames which MUST exist. |
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413 | 413 | target: single filename which may or may not exist. |
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414 | 414 | |
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415 | 415 | If target doesn't exist or is older than any file listed in deps, return |
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416 | 416 | true, otherwise return false. |
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417 | 417 | """ |
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418 | 418 | try: |
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419 | 419 | target_time = os.path.getmtime(target) |
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420 | 420 | except os.error: |
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421 | 421 | return 1 |
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422 | 422 | for dep in deps: |
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423 | 423 | dep_time = os.path.getmtime(dep) |
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424 | 424 | if dep_time > target_time: |
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425 | 425 | #print "For target",target,"Dep failed:",dep # dbg |
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426 | 426 | #print "times (dep,tar):",dep_time,target_time # dbg |
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427 | 427 | return 1 |
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428 | 428 | return 0 |
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429 | 429 | |
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430 | 430 | |
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431 | 431 | def target_update(target,deps,cmd): |
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432 | 432 | """Update a target with a given command given a list of dependencies. |
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433 | 433 | |
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434 | 434 | target_update(target,deps,cmd) -> runs cmd if target is outdated. |
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435 | 435 | |
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436 | 436 | This is just a wrapper around target_outdated() which calls the given |
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437 | 437 | command if target is outdated.""" |
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438 | 438 | |
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439 | 439 | if target_outdated(target,deps): |
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440 | 440 | system(cmd) |
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441 | 441 | |
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442 | 442 | def filehash(path): |
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443 | 443 | """Make an MD5 hash of a file, ignoring any differences in line |
|
444 | 444 | ending characters.""" |
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445 | 445 | with open(path, "rU") as f: |
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446 | 446 | return md5(py3compat.str_to_bytes(f.read())).hexdigest() |
|
447 | 447 | |
|
448 | 448 | # If the config is unmodified from the default, we'll just delete it. |
|
449 | 449 | # These are consistent for 0.10.x, thankfully. We're not going to worry about |
|
450 | 450 | # older versions. |
|
451 | 451 | old_config_md5 = {'ipy_user_conf.py': 'fc108bedff4b9a00f91fa0a5999140d3', |
|
452 | 452 | 'ipythonrc': '12a68954f3403eea2eec09dc8fe5a9b5'} |
|
453 | 453 | |
|
454 | 454 | def check_for_old_config(ipython_dir=None): |
|
455 | 455 | """Check for old config files, and present a warning if they exist. |
|
456 | 456 | |
|
457 | 457 | A link to the docs of the new config is included in the message. |
|
458 | 458 | |
|
459 | 459 | This should mitigate confusion with the transition to the new |
|
460 | 460 | config system in 0.11. |
|
461 | 461 | """ |
|
462 | 462 | if ipython_dir is None: |
|
463 | 463 | ipython_dir = get_ipython_dir() |
|
464 | 464 | |
|
465 | 465 | old_configs = ['ipy_user_conf.py', 'ipythonrc', 'ipython_config.py'] |
|
466 | 466 | warned = False |
|
467 | 467 | for cfg in old_configs: |
|
468 | 468 | f = os.path.join(ipython_dir, cfg) |
|
469 | 469 | if os.path.exists(f): |
|
470 | 470 | if filehash(f) == old_config_md5.get(cfg, ''): |
|
471 | 471 | os.unlink(f) |
|
472 | 472 | else: |
|
473 | 473 | warnings.warn("Found old IPython config file %r (modified by user)"%f) |
|
474 | 474 | warned = True |
|
475 | 475 | |
|
476 | 476 | if warned: |
|
477 | 477 | warnings.warn(""" |
|
478 | 478 | The IPython configuration system has changed as of 0.11, and these files will |
|
479 | 479 | be ignored. See http://ipython.github.com/ipython-doc/dev/config for details |
|
480 | 480 | of the new config system. |
|
481 | 481 | To start configuring IPython, do `ipython profile create`, and edit |
|
482 | 482 | `ipython_config.py` in <ipython_dir>/profile_default. |
|
483 | 483 | If you need to leave the old config files in place for an older version of |
|
484 | 484 | IPython and want to suppress this warning message, set |
|
485 | 485 | `c.InteractiveShellApp.ignore_old_config=True` in the new config.""") |
|
486 | 486 | |
|
487 | 487 | def get_security_file(filename, profile='default'): |
|
488 | 488 | """Return the absolute path of a security file given by filename and profile |
|
489 | 489 | |
|
490 | 490 | This allows users and developers to find security files without |
|
491 | 491 | knowledge of the IPython directory structure. The search path |
|
492 | 492 | will be ['.', profile.security_dir] |
|
493 | 493 | |
|
494 | 494 | Parameters |
|
495 | 495 | ---------- |
|
496 | 496 | |
|
497 | 497 | filename : str |
|
498 | 498 | The file to be found. If it is passed as an absolute path, it will |
|
499 | 499 | simply be returned. |
|
500 | 500 | profile : str [default: 'default'] |
|
501 | 501 | The name of the profile to search. Leaving this unspecified |
|
502 | 502 | The file to be found. If it is passed as an absolute path, fname will |
|
503 | 503 | simply be returned. |
|
504 | 504 | |
|
505 | 505 | Returns |
|
506 | 506 | ------- |
|
507 | 507 | Raises :exc:`IOError` if file not found or returns absolute path to file. |
|
508 | 508 | """ |
|
509 | 509 | # import here, because profiledir also imports from utils.path |
|
510 | 510 | from IPython.core.profiledir import ProfileDir |
|
511 | 511 | try: |
|
512 | 512 | pd = ProfileDir.find_profile_dir_by_name(get_ipython_dir(), profile) |
|
513 | 513 | except Exception: |
|
514 | 514 | # will raise ProfileDirError if no such profile |
|
515 | 515 | raise IOError("Profile %r not found") |
|
516 | 516 | return filefind(filename, ['.', pd.security_dir]) |
|
517 | 517 | |
|
518 | 518 | |
|
519 | 519 | ENOLINK = 1998 |
|
520 | 520 | |
|
521 | 521 | def link(src, dst): |
|
522 | 522 | """Hard links ``src`` to ``dst``, returning 0 or errno. |
|
523 | 523 | |
|
524 | 524 | Note that the special errno ``ENOLINK`` will be returned if ``os.link`` isn't |
|
525 | 525 | supported by the operating system. |
|
526 | 526 | """ |
|
527 | 527 | |
|
528 | 528 | if not hasattr(os, "link"): |
|
529 | 529 | return ENOLINK |
|
530 | 530 | link_errno = 0 |
|
531 | 531 | try: |
|
532 | 532 | os.link(src, dst) |
|
533 | 533 | except OSError as e: |
|
534 | 534 | link_errno = e.errno |
|
535 | 535 | return link_errno |
|
536 | 536 | |
|
537 | 537 | |
|
538 | 538 | def link_or_copy(src, dst): |
|
539 | 539 | """Attempts to hardlink ``src`` to ``dst``, copying if the link fails. |
|
540 | 540 | |
|
541 | 541 | Attempts to maintain the semantics of ``shutil.copy``. |
|
542 | 542 | |
|
543 | 543 | Because ``os.link`` does not overwrite files, a unique temporary file |
|
544 | 544 | will be used if the target already exists, then that file will be moved |
|
545 | 545 | into place. |
|
546 | 546 | """ |
|
547 | 547 | |
|
548 | 548 | if os.path.isdir(dst): |
|
549 | 549 | dst = os.path.join(dst, os.path.basename(src)) |
|
550 | 550 | |
|
551 | 551 | link_errno = link(src, dst) |
|
552 | 552 | if link_errno == errno.EEXIST: |
|
553 | 553 | new_dst = dst + "-temp-%04X" %(random.randint(1, 16**4), ) |
|
554 | 554 | try: |
|
555 | 555 | link_or_copy(src, new_dst) |
|
556 | 556 | except: |
|
557 | 557 | try: |
|
558 | 558 | os.remove(new_dst) |
|
559 | 559 | except OSError: |
|
560 | 560 | pass |
|
561 | 561 | raise |
|
562 | 562 | os.rename(new_dst, dst) |
|
563 | 563 | elif link_errno != 0: |
|
564 | 564 | # Either link isn't supported, or the filesystem doesn't support |
|
565 | 565 | # linking, or 'src' and 'dst' are on different filesystems. |
|
566 | 566 | shutil.copy(src, dst) |
|
567 | 567 | |
|
568 | 568 | def ensure_dir_exists(path, mode=0o777): |
|
569 | 569 | """ensure that a directory exists |
|
570 | 570 | |
|
571 | 571 | If it doesn't exist, try to create it and protect against a race condition |
|
572 | 572 | if another process is doing the same. |
|
573 | 573 | """ |
|
574 | 574 | if not os.path.exists(path): |
|
575 | 575 | try: |
|
576 | 576 | os.makedirs(path, mode=mode) |
|
577 | 577 | except OSError as e: |
|
578 | 578 | if e.errno != errno.EEXIST: |
|
579 | 579 | raise |
|
580 | No newline at end of file | |
|
580 | elif not os.path.isdir(path): | |
|
581 | raise IOError("%r exists but is not a directory" % path) |
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