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1 | 1 | # extensions.py - extension handling for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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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 | from __future__ import absolute_import |
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9 | 9 | |
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10 | 10 | import imp |
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11 | 11 | import os |
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12 | 12 | |
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13 | 13 | from .i18n import ( |
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14 | 14 | _, |
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15 | 15 | gettext, |
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16 | 16 | ) |
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17 | 17 | |
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18 | 18 | from . import ( |
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19 | 19 | cmdutil, |
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20 | 20 | error, |
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21 | 21 | util, |
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22 | 22 | ) |
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23 | 23 | |
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24 | 24 | _extensions = {} |
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25 | 25 | _aftercallbacks = {} |
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26 | 26 | _order = [] |
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27 | 27 | _builtin = set(['hbisect', 'bookmarks', 'parentrevspec', 'progress', 'interhg', |
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28 | 28 | 'inotify', 'hgcia']) |
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29 | 29 | |
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30 | 30 | def extensions(ui=None): |
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31 | 31 | if ui: |
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32 | 32 | def enabled(name): |
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33 | 33 | for format in ['%s', 'hgext.%s']: |
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34 | 34 | conf = ui.config('extensions', format % name) |
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35 | 35 | if conf is not None and not conf.startswith('!'): |
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36 | 36 | return True |
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37 | 37 | else: |
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38 | 38 | enabled = lambda name: True |
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39 | 39 | for name in _order: |
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40 | 40 | module = _extensions[name] |
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41 | 41 | if module and enabled(name): |
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42 | 42 | yield name, module |
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43 | 43 | |
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44 | 44 | def find(name): |
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45 | 45 | '''return module with given extension name''' |
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46 | 46 | mod = None |
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47 | 47 | try: |
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48 | 48 | mod = _extensions[name] |
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49 | 49 | except KeyError: |
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50 | 50 | for k, v in _extensions.iteritems(): |
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51 | 51 | if k.endswith('.' + name) or k.endswith('/' + name): |
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52 | 52 | mod = v |
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53 | 53 | break |
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54 | 54 | if not mod: |
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55 | 55 | raise KeyError(name) |
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56 | 56 | return mod |
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57 | 57 | |
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58 | 58 | def loadpath(path, module_name): |
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59 | 59 | module_name = module_name.replace('.', '_') |
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60 | 60 | path = util.normpath(util.expandpath(path)) |
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61 | 61 | if os.path.isdir(path): |
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62 | 62 | # module/__init__.py style |
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63 | 63 | d, f = os.path.split(path) |
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64 | 64 | fd, fpath, desc = imp.find_module(f, [d]) |
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65 | 65 | return imp.load_module(module_name, fd, fpath, desc) |
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66 | 66 | else: |
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67 | 67 | try: |
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68 | 68 | return imp.load_source(module_name, path) |
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69 | 69 | except IOError as exc: |
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70 | 70 | if not exc.filename: |
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71 | 71 | exc.filename = path # python does not fill this |
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72 | 72 | raise |
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73 | 73 | |
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74 | 74 | def _importh(name): |
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75 | 75 | """import and return the <name> module""" |
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76 | 76 | mod = __import__(name) |
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77 | 77 | components = name.split('.') |
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78 | 78 | for comp in components[1:]: |
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79 | 79 | mod = getattr(mod, comp) |
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80 | 80 | return mod |
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81 | 81 | |
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82 | 82 | def _reportimporterror(ui, err, failed, next): |
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83 | 83 | ui.debug('could not import %s (%s): trying %s\n' |
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84 | 84 | % (failed, err, next)) |
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85 | 85 | if ui.debugflag: |
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86 | 86 | ui.traceback() |
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87 | 87 | |
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88 | 88 | def load(ui, name, path): |
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89 | 89 | if name.startswith('hgext.') or name.startswith('hgext/'): |
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90 | 90 | shortname = name[6:] |
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91 | 91 | else: |
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92 | 92 | shortname = name |
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93 | 93 | if shortname in _builtin: |
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94 | 94 | return None |
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95 | 95 | if shortname in _extensions: |
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96 | 96 | return _extensions[shortname] |
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97 | 97 | _extensions[shortname] = None |
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98 | 98 | if path: |
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99 | 99 | # the module will be loaded in sys.modules |
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100 | 100 | # choose an unique name so that it doesn't |
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101 | 101 | # conflicts with other modules |
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102 | 102 | mod = loadpath(path, 'hgext.%s' % name) |
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103 | 103 | else: |
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104 | 104 | try: |
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105 | 105 | mod = _importh("hgext.%s" % name) |
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106 | 106 | except ImportError as err: |
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107 | 107 | _reportimporterror(ui, err, "hgext.%s" % name, name) |
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108 | 108 | try: |
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109 | 109 | mod = _importh("hgext3rd.%s" % name) |
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110 | 110 | except ImportError as err: |
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111 | 111 | _reportimporterror(ui, err, "hgext3rd.%s" % name, name) |
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112 | 112 | mod = _importh(name) |
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113 | 113 | |
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114 | 114 | # Before we do anything with the extension, check against minimum stated |
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115 | 115 | # compatibility. This gives extension authors a mechanism to have their |
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116 | 116 | # extensions short circuit when loaded with a known incompatible version |
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117 | 117 | # of Mercurial. |
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118 | 118 | minver = getattr(mod, 'minimumhgversion', None) |
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119 | 119 | if minver and util.versiontuple(minver, 2) > util.versiontuple(n=2): |
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120 | 120 | ui.warn(_('(third party extension %s requires version %s or newer ' |
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121 | 121 | 'of Mercurial; disabling)\n') % (shortname, minver)) |
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122 | 122 | return |
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123 | 123 | |
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124 | 124 | _extensions[shortname] = mod |
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125 | 125 | _order.append(shortname) |
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126 | 126 | for fn in _aftercallbacks.get(shortname, []): |
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127 | 127 | fn(loaded=True) |
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128 | 128 | return mod |
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129 | 129 | |
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130 | def _runuisetup(name, ui): | |
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131 | uisetup = getattr(_extensions[name], 'uisetup', None) | |
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132 | if uisetup: | |
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133 | uisetup(ui) | |
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134 | ||
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135 | def _runextsetup(name, ui): | |
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136 | extsetup = getattr(_extensions[name], 'extsetup', None) | |
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137 | if extsetup: | |
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138 | try: | |
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139 | extsetup(ui) | |
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140 | except TypeError: | |
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141 | if extsetup.func_code.co_argcount != 0: | |
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142 | raise | |
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143 | extsetup() # old extsetup with no ui argument | |
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144 | ||
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130 | 145 | def loadall(ui): |
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131 | 146 | result = ui.configitems("extensions") |
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132 | 147 | newindex = len(_order) |
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133 | 148 | for (name, path) in result: |
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134 | 149 | if path: |
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135 | 150 | if path[0] == '!': |
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136 | 151 | continue |
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137 | 152 | try: |
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138 | 153 | load(ui, name, path) |
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139 | 154 | except KeyboardInterrupt: |
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140 | 155 | raise |
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141 | 156 | except Exception as inst: |
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142 | 157 | if path: |
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143 | 158 | ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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144 | 159 | % (name, path, inst)) |
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145 | 160 | else: |
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146 | 161 | ui.warn(_("*** failed to import extension %s: %s\n") |
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147 | 162 | % (name, inst)) |
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148 | 163 | ui.traceback() |
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149 | 164 | |
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150 | 165 | for name in _order[newindex:]: |
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151 | uisetup = getattr(_extensions[name], 'uisetup', None) | |
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152 | if uisetup: | |
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153 | uisetup(ui) | |
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166 | _runuisetup(name, ui) | |
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154 | 167 | |
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155 | 168 | for name in _order[newindex:]: |
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156 | extsetup = getattr(_extensions[name], 'extsetup', None) | |
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157 | if extsetup: | |
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158 | try: | |
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159 | extsetup(ui) | |
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160 | except TypeError: | |
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161 | if extsetup.func_code.co_argcount != 0: | |
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162 | raise | |
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163 | extsetup() # old extsetup with no ui argument | |
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169 | _runextsetup(name, ui) | |
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164 | 170 | |
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165 | 171 | # Call aftercallbacks that were never met. |
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166 | 172 | for shortname in _aftercallbacks: |
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167 | 173 | if shortname in _extensions: |
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168 | 174 | continue |
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169 | 175 | |
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170 | 176 | for fn in _aftercallbacks[shortname]: |
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171 | 177 | fn(loaded=False) |
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172 | 178 | |
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173 | 179 | # loadall() is called multiple times and lingering _aftercallbacks |
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174 | 180 | # entries could result in double execution. See issue4646. |
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175 | 181 | _aftercallbacks.clear() |
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176 | 182 | |
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177 | 183 | def afterloaded(extension, callback): |
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178 | 184 | '''Run the specified function after a named extension is loaded. |
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179 | 185 | |
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180 | 186 | If the named extension is already loaded, the callback will be called |
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181 | 187 | immediately. |
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182 | 188 | |
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183 | 189 | If the named extension never loads, the callback will be called after |
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184 | 190 | all extensions have been loaded. |
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185 | 191 | |
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186 | 192 | The callback receives the named argument ``loaded``, which is a boolean |
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187 | 193 | indicating whether the dependent extension actually loaded. |
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188 | 194 | ''' |
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189 | 195 | |
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190 | 196 | if extension in _extensions: |
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191 | 197 | callback(loaded=True) |
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192 | 198 | else: |
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193 | 199 | _aftercallbacks.setdefault(extension, []).append(callback) |
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194 | 200 | |
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195 | 201 | def bind(func, *args): |
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196 | 202 | '''Partial function application |
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197 | 203 | |
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198 | 204 | Returns a new function that is the partial application of args and kwargs |
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199 | 205 | to func. For example, |
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200 | 206 | |
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201 | 207 | f(1, 2, bar=3) === bind(f, 1)(2, bar=3)''' |
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202 | 208 | assert callable(func) |
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203 | 209 | def closure(*a, **kw): |
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204 | 210 | return func(*(args + a), **kw) |
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205 | 211 | return closure |
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206 | 212 | |
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207 | 213 | def _updatewrapper(wrap, origfn): |
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208 | 214 | '''Copy attributes to wrapper function''' |
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209 | 215 | wrap.__module__ = getattr(origfn, '__module__') |
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210 | 216 | wrap.__doc__ = getattr(origfn, '__doc__') |
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211 | 217 | wrap.__dict__.update(getattr(origfn, '__dict__', {})) |
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212 | 218 | |
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213 | 219 | def wrapcommand(table, command, wrapper, synopsis=None, docstring=None): |
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214 | 220 | '''Wrap the command named `command' in table |
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215 | 221 | |
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216 | 222 | Replace command in the command table with wrapper. The wrapped command will |
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217 | 223 | be inserted into the command table specified by the table argument. |
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218 | 224 | |
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219 | 225 | The wrapper will be called like |
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220 | 226 | |
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221 | 227 | wrapper(orig, *args, **kwargs) |
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222 | 228 | |
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223 | 229 | where orig is the original (wrapped) function, and *args, **kwargs |
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224 | 230 | are the arguments passed to it. |
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225 | 231 | |
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226 | 232 | Optionally append to the command synopsis and docstring, used for help. |
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227 | 233 | For example, if your extension wraps the ``bookmarks`` command to add the |
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228 | 234 | flags ``--remote`` and ``--all`` you might call this function like so: |
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229 | 235 | |
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230 | 236 | synopsis = ' [-a] [--remote]' |
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231 | 237 | docstring = """ |
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232 | 238 | |
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233 | 239 | The ``remotenames`` extension adds the ``--remote`` and ``--all`` (``-a``) |
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234 | 240 | flags to the bookmarks command. Either flag will show the remote bookmarks |
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235 | 241 | known to the repository; ``--remote`` will also suppress the output of the |
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236 | 242 | local bookmarks. |
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237 | 243 | """ |
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238 | 244 | |
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239 | 245 | extensions.wrapcommand(commands.table, 'bookmarks', exbookmarks, |
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240 | 246 | synopsis, docstring) |
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241 | 247 | ''' |
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242 | 248 | assert callable(wrapper) |
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243 | 249 | aliases, entry = cmdutil.findcmd(command, table) |
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244 | 250 | for alias, e in table.iteritems(): |
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245 | 251 | if e is entry: |
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246 | 252 | key = alias |
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247 | 253 | break |
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248 | 254 | |
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249 | 255 | origfn = entry[0] |
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250 | 256 | wrap = bind(util.checksignature(wrapper), util.checksignature(origfn)) |
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251 | 257 | _updatewrapper(wrap, origfn) |
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252 | 258 | if docstring is not None: |
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253 | 259 | wrap.__doc__ += docstring |
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254 | 260 | |
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255 | 261 | newentry = list(entry) |
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256 | 262 | newentry[0] = wrap |
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257 | 263 | if synopsis is not None: |
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258 | 264 | newentry[2] += synopsis |
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259 | 265 | table[key] = tuple(newentry) |
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260 | 266 | return entry |
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261 | 267 | |
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262 | 268 | def wrapfunction(container, funcname, wrapper): |
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263 | 269 | '''Wrap the function named funcname in container |
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264 | 270 | |
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265 | 271 | Replace the funcname member in the given container with the specified |
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266 | 272 | wrapper. The container is typically a module, class, or instance. |
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267 | 273 | |
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268 | 274 | The wrapper will be called like |
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269 | 275 | |
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270 | 276 | wrapper(orig, *args, **kwargs) |
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271 | 277 | |
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272 | 278 | where orig is the original (wrapped) function, and *args, **kwargs |
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273 | 279 | are the arguments passed to it. |
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274 | 280 | |
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275 | 281 | Wrapping methods of the repository object is not recommended since |
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276 | 282 | it conflicts with extensions that extend the repository by |
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277 | 283 | subclassing. All extensions that need to extend methods of |
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278 | 284 | localrepository should use this subclassing trick: namely, |
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279 | 285 | reposetup() should look like |
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280 | 286 | |
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281 | 287 | def reposetup(ui, repo): |
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282 | 288 | class myrepo(repo.__class__): |
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283 | 289 | def whatever(self, *args, **kwargs): |
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284 | 290 | [...extension stuff...] |
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285 | 291 | super(myrepo, self).whatever(*args, **kwargs) |
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286 | 292 | [...extension stuff...] |
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287 | 293 | |
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288 | 294 | repo.__class__ = myrepo |
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289 | 295 | |
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290 | 296 | In general, combining wrapfunction() with subclassing does not |
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291 | 297 | work. Since you cannot control what other extensions are loaded by |
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292 | 298 | your end users, you should play nicely with others by using the |
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293 | 299 | subclass trick. |
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294 | 300 | ''' |
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295 | 301 | assert callable(wrapper) |
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296 | 302 | |
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297 | 303 | origfn = getattr(container, funcname) |
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298 | 304 | assert callable(origfn) |
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299 | 305 | wrap = bind(wrapper, origfn) |
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300 | 306 | _updatewrapper(wrap, origfn) |
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301 | 307 | setattr(container, funcname, wrap) |
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302 | 308 | return origfn |
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303 | 309 | |
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304 | 310 | def _disabledpaths(strip_init=False): |
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305 | 311 | '''find paths of disabled extensions. returns a dict of {name: path} |
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306 | 312 | removes /__init__.py from packages if strip_init is True''' |
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307 | 313 | import hgext |
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308 | 314 | extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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309 | 315 | try: # might not be a filesystem path |
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310 | 316 | files = os.listdir(extpath) |
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311 | 317 | except OSError: |
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312 | 318 | return {} |
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313 | 319 | |
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314 | 320 | exts = {} |
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315 | 321 | for e in files: |
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316 | 322 | if e.endswith('.py'): |
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317 | 323 | name = e.rsplit('.', 1)[0] |
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318 | 324 | path = os.path.join(extpath, e) |
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319 | 325 | else: |
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320 | 326 | name = e |
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321 | 327 | path = os.path.join(extpath, e, '__init__.py') |
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322 | 328 | if not os.path.exists(path): |
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323 | 329 | continue |
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324 | 330 | if strip_init: |
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325 | 331 | path = os.path.dirname(path) |
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326 | 332 | if name in exts or name in _order or name == '__init__': |
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327 | 333 | continue |
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328 | 334 | exts[name] = path |
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329 | 335 | return exts |
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330 | 336 | |
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331 | 337 | def _moduledoc(file): |
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332 | 338 | '''return the top-level python documentation for the given file |
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333 | 339 | |
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334 | 340 | Loosely inspired by pydoc.source_synopsis(), but rewritten to |
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335 | 341 | handle triple quotes and to return the whole text instead of just |
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336 | 342 | the synopsis''' |
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337 | 343 | result = [] |
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338 | 344 | |
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339 | 345 | line = file.readline() |
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340 | 346 | while line[:1] == '#' or not line.strip(): |
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341 | 347 | line = file.readline() |
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342 | 348 | if not line: |
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343 | 349 | break |
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344 | 350 | |
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345 | 351 | start = line[:3] |
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346 | 352 | if start == '"""' or start == "'''": |
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347 | 353 | line = line[3:] |
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348 | 354 | while line: |
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349 | 355 | if line.rstrip().endswith(start): |
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350 | 356 | line = line.split(start)[0] |
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351 | 357 | if line: |
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352 | 358 | result.append(line) |
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353 | 359 | break |
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354 | 360 | elif not line: |
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355 | 361 | return None # unmatched delimiter |
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356 | 362 | result.append(line) |
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357 | 363 | line = file.readline() |
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358 | 364 | else: |
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359 | 365 | return None |
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360 | 366 | |
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361 | 367 | return ''.join(result) |
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362 | 368 | |
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363 | 369 | def _disabledhelp(path): |
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364 | 370 | '''retrieve help synopsis of a disabled extension (without importing)''' |
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365 | 371 | try: |
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366 | 372 | file = open(path) |
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367 | 373 | except IOError: |
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368 | 374 | return |
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369 | 375 | else: |
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370 | 376 | doc = _moduledoc(file) |
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371 | 377 | file.close() |
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372 | 378 | |
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373 | 379 | if doc: # extracting localized synopsis |
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374 | 380 | return gettext(doc).splitlines()[0] |
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375 | 381 | else: |
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376 | 382 | return _('(no help text available)') |
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377 | 383 | |
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378 | 384 | def disabled(): |
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379 | 385 | '''find disabled extensions from hgext. returns a dict of {name: desc}''' |
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380 | 386 | try: |
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381 | 387 | from hgext import __index__ |
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382 | 388 | return dict((name, gettext(desc)) |
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383 | 389 | for name, desc in __index__.docs.iteritems() |
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384 | 390 | if name not in _order) |
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385 | 391 | except (ImportError, AttributeError): |
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386 | 392 | pass |
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387 | 393 | |
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388 | 394 | paths = _disabledpaths() |
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389 | 395 | if not paths: |
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390 | 396 | return {} |
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391 | 397 | |
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392 | 398 | exts = {} |
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393 | 399 | for name, path in paths.iteritems(): |
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394 | 400 | doc = _disabledhelp(path) |
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395 | 401 | if doc: |
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396 | 402 | exts[name] = doc |
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397 | 403 | |
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398 | 404 | return exts |
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399 | 405 | |
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400 | 406 | def disabledext(name): |
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401 | 407 | '''find a specific disabled extension from hgext. returns desc''' |
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402 | 408 | try: |
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403 | 409 | from hgext import __index__ |
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404 | 410 | if name in _order: # enabled |
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405 | 411 | return |
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406 | 412 | else: |
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407 | 413 | return gettext(__index__.docs.get(name)) |
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408 | 414 | except (ImportError, AttributeError): |
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409 | 415 | pass |
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410 | 416 | |
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411 | 417 | paths = _disabledpaths() |
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412 | 418 | if name in paths: |
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413 | 419 | return _disabledhelp(paths[name]) |
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414 | 420 | |
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415 | 421 | def disabledcmd(ui, cmd, strict=False): |
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416 | 422 | '''import disabled extensions until cmd is found. |
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417 | 423 | returns (cmdname, extname, module)''' |
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418 | 424 | |
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419 | 425 | paths = _disabledpaths(strip_init=True) |
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420 | 426 | if not paths: |
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421 | 427 | raise error.UnknownCommand(cmd) |
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422 | 428 | |
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423 | 429 | def findcmd(cmd, name, path): |
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424 | 430 | try: |
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425 | 431 | mod = loadpath(path, 'hgext.%s' % name) |
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426 | 432 | except Exception: |
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427 | 433 | return |
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428 | 434 | try: |
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429 | 435 | aliases, entry = cmdutil.findcmd(cmd, |
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430 | 436 | getattr(mod, 'cmdtable', {}), strict) |
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431 | 437 | except (error.AmbiguousCommand, error.UnknownCommand): |
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432 | 438 | return |
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433 | 439 | except Exception: |
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434 | 440 | ui.warn(_('warning: error finding commands in %s\n') % path) |
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435 | 441 | ui.traceback() |
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436 | 442 | return |
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437 | 443 | for c in aliases: |
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438 | 444 | if c.startswith(cmd): |
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439 | 445 | cmd = c |
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440 | 446 | break |
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441 | 447 | else: |
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442 | 448 | cmd = aliases[0] |
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443 | 449 | return (cmd, name, mod) |
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444 | 450 | |
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445 | 451 | ext = None |
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446 | 452 | # first, search for an extension with the same name as the command |
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447 | 453 | path = paths.pop(cmd, None) |
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448 | 454 | if path: |
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449 | 455 | ext = findcmd(cmd, cmd, path) |
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450 | 456 | if not ext: |
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451 | 457 | # otherwise, interrogate each extension until there's a match |
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452 | 458 | for name, path in paths.iteritems(): |
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453 | 459 | ext = findcmd(cmd, name, path) |
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454 | 460 | if ext: |
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455 | 461 | break |
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456 | 462 | if ext and 'DEPRECATED' not in ext.__doc__: |
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457 | 463 | return ext |
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458 | 464 | |
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459 | 465 | raise error.UnknownCommand(cmd) |
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460 | 466 | |
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461 | 467 | def enabled(shortname=True): |
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462 | 468 | '''return a dict of {name: desc} of extensions''' |
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463 | 469 | exts = {} |
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464 | 470 | for ename, ext in extensions(): |
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465 | 471 | doc = (gettext(ext.__doc__) or _('(no help text available)')) |
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466 | 472 | if shortname: |
|
467 | 473 | ename = ename.split('.')[-1] |
|
468 | 474 | exts[ename] = doc.splitlines()[0].strip() |
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469 | 475 | |
|
470 | 476 | return exts |
|
471 | 477 | |
|
472 | 478 | def notloaded(): |
|
473 | 479 | '''return short names of extensions that failed to load''' |
|
474 | 480 | return [name for name, mod in _extensions.iteritems() if mod is None] |
|
475 | 481 | |
|
476 | 482 | def moduleversion(module): |
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477 | 483 | '''return version information from given module as a string''' |
|
478 | 484 | if (util.safehasattr(module, 'getversion') |
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479 | 485 | and callable(module.getversion)): |
|
480 | 486 | version = module.getversion() |
|
481 | 487 | elif util.safehasattr(module, '__version__'): |
|
482 | 488 | version = module.__version__ |
|
483 | 489 | else: |
|
484 | 490 | version = '' |
|
485 | 491 | if isinstance(version, (list, tuple)): |
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486 | 492 | version = '.'.join(str(o) for o in version) |
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487 | 493 | return version |
|
488 | 494 | |
|
489 | 495 | def ismoduleinternal(module): |
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490 | 496 | exttestedwith = getattr(module, 'testedwith', None) |
|
491 | 497 | return exttestedwith == "internal" |
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