Mercurial > hg
annotate mercurial/extensions.py @ 23953:af73c05e735a stable
extensions: don't quit loading extensions in the middle if traceback is on
This was introduced way back in 2006 (rev 1f6d520557ec) as sys.exit(0) if
loading an extension failed when --traceback was on, then at some point morphed
into a 'return 1' in a function that otherwise returns nothing.
At this point, if ui.traceback is enabled and if loading an extension fails for
whatever reason, including one as innocent as it not being present, we leave
any extensions loaded so far in a bogus half-initialized state. That doesn't
really make any sense.
author | Siddharth Agarwal <sid0@fb.com> |
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date | Fri, 23 Jan 2015 20:30:49 -0800 |
parents | ecdbbb6e5d06 |
children | d8837ad682dd |
rev | line source |
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1 # extensions.py - extension handling for mercurial |
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2 # |
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import imp, os |
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9 import util, cmdutil, error |
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10 from i18n import _, gettext |
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11 |
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12 _extensions = {} |
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13 _order = [] |
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14 _ignore = ['hbisect', 'bookmarks', 'parentrevspec', 'interhg', 'inotify'] |
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15 |
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16 def extensions(ui=None): |
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17 if ui: |
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18 def enabled(name): |
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19 for format in ['%s', 'hgext.%s']: |
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20 conf = ui.config('extensions', format % name) |
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21 if conf is not None and not conf.startswith('!'): |
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22 return True |
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23 else: |
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24 enabled = lambda name: True |
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25 for name in _order: |
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26 module = _extensions[name] |
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27 if module and enabled(name): |
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28 yield name, module |
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29 |
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30 def find(name): |
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31 '''return module with given extension name''' |
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32 mod = None |
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33 try: |
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34 mod = _extensions[name] |
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35 except KeyError: |
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36 for k, v in _extensions.iteritems(): |
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37 if k.endswith('.' + name) or k.endswith('/' + name): |
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38 mod = v |
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39 break |
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40 if not mod: |
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41 raise KeyError(name) |
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42 return mod |
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43 |
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44 def loadpath(path, module_name): |
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45 module_name = module_name.replace('.', '_') |
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46 path = util.normpath(util.expandpath(path)) |
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47 if os.path.isdir(path): |
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48 # module/__init__.py style |
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49 d, f = os.path.split(path) |
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50 fd, fpath, desc = imp.find_module(f, [d]) |
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51 return imp.load_module(module_name, fd, fpath, desc) |
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52 else: |
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53 try: |
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54 return imp.load_source(module_name, path) |
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55 except IOError, exc: |
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56 if not exc.filename: |
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57 exc.filename = path # python does not fill this |
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58 raise |
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59 |
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60 def load(ui, name, path): |
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61 if name.startswith('hgext.') or name.startswith('hgext/'): |
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62 shortname = name[6:] |
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63 else: |
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64 shortname = name |
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65 if shortname in _ignore: |
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66 return None |
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67 if shortname in _extensions: |
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68 return _extensions[shortname] |
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69 _extensions[shortname] = None |
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70 if path: |
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71 # the module will be loaded in sys.modules |
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72 # choose an unique name so that it doesn't |
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73 # conflicts with other modules |
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74 mod = loadpath(path, 'hgext.%s' % name) |
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75 else: |
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76 def importh(name): |
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77 mod = __import__(name) |
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78 components = name.split('.') |
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79 for comp in components[1:]: |
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80 mod = getattr(mod, comp) |
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81 return mod |
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82 try: |
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83 mod = importh("hgext.%s" % name) |
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84 except ImportError, err: |
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85 ui.debug('could not import hgext.%s (%s): trying %s\n' |
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86 % (name, err, name)) |
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87 mod = importh(name) |
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88 _extensions[shortname] = mod |
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89 _order.append(shortname) |
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90 return mod |
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91 |
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92 def loadall(ui): |
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93 result = ui.configitems("extensions") |
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94 newindex = len(_order) |
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95 for (name, path) in result: |
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96 if path: |
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97 if path[0] == '!': |
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98 continue |
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99 try: |
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100 load(ui, name, path) |
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101 except KeyboardInterrupt: |
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102 raise |
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103 except Exception, inst: |
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104 if path: |
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105 ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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106 % (name, path, inst)) |
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107 else: |
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108 ui.warn(_("*** failed to import extension %s: %s\n") |
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109 % (name, inst)) |
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110 |
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111 for name in _order[newindex:]: |
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112 uisetup = getattr(_extensions[name], 'uisetup', None) |
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113 if uisetup: |
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114 uisetup(ui) |
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115 |
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116 for name in _order[newindex:]: |
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117 extsetup = getattr(_extensions[name], 'extsetup', None) |
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118 if extsetup: |
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119 try: |
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120 extsetup(ui) |
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121 except TypeError: |
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122 if extsetup.func_code.co_argcount != 0: |
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123 raise |
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124 extsetup() # old extsetup with no ui argument |
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125 |
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126 def wrapcommand(table, command, wrapper): |
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127 '''Wrap the command named `command' in table |
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128 |
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129 Replace command in the command table with wrapper. The wrapped command will |
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130 be inserted into the command table specified by the table argument. |
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131 |
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132 The wrapper will be called like |
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133 |
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134 wrapper(orig, *args, **kwargs) |
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135 |
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136 where orig is the original (wrapped) function, and *args, **kwargs |
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137 are the arguments passed to it. |
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138 ''' |
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139 assert callable(wrapper) |
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140 aliases, entry = cmdutil.findcmd(command, table) |
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141 for alias, e in table.iteritems(): |
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142 if e is entry: |
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143 key = alias |
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144 break |
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145 |
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146 origfn = entry[0] |
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147 def wrap(*args, **kwargs): |
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148 return util.checksignature(wrapper)( |
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149 util.checksignature(origfn), *args, **kwargs) |
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150 |
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151 wrap.__doc__ = getattr(origfn, '__doc__') |
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152 wrap.__module__ = getattr(origfn, '__module__') |
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153 |
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154 newentry = list(entry) |
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155 newentry[0] = wrap |
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156 table[key] = tuple(newentry) |
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157 return entry |
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158 |
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159 def wrapfunction(container, funcname, wrapper): |
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160 '''Wrap the function named funcname in container |
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161 |
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162 Replace the funcname member in the given container with the specified |
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163 wrapper. The container is typically a module, class, or instance. |
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164 |
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165 The wrapper will be called like |
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166 |
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167 wrapper(orig, *args, **kwargs) |
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168 |
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169 where orig is the original (wrapped) function, and *args, **kwargs |
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170 are the arguments passed to it. |
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171 |
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172 Wrapping methods of the repository object is not recommended since |
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173 it conflicts with extensions that extend the repository by |
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174 subclassing. All extensions that need to extend methods of |
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175 localrepository should use this subclassing trick: namely, |
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176 reposetup() should look like |
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177 |
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178 def reposetup(ui, repo): |
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179 class myrepo(repo.__class__): |
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180 def whatever(self, *args, **kwargs): |
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181 [...extension stuff...] |
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182 super(myrepo, self).whatever(*args, **kwargs) |
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183 [...extension stuff...] |
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184 |
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185 repo.__class__ = myrepo |
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186 |
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187 In general, combining wrapfunction() with subclassing does not |
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188 work. Since you cannot control what other extensions are loaded by |
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189 your end users, you should play nicely with others by using the |
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190 subclass trick. |
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191 ''' |
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192 assert callable(wrapper) |
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193 def wrap(*args, **kwargs): |
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194 return wrapper(origfn, *args, **kwargs) |
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195 |
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196 origfn = getattr(container, funcname) |
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197 assert callable(origfn) |
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198 setattr(container, funcname, wrap) |
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199 return origfn |
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200 |
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201 def _disabledpaths(strip_init=False): |
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202 '''find paths of disabled extensions. returns a dict of {name: path} |
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203 removes /__init__.py from packages if strip_init is True''' |
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204 import hgext |
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205 extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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206 try: # might not be a filesystem path |
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207 files = os.listdir(extpath) |
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208 except OSError: |
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209 return {} |
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210 |
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211 exts = {} |
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212 for e in files: |
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213 if e.endswith('.py'): |
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214 name = e.rsplit('.', 1)[0] |
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215 path = os.path.join(extpath, e) |
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216 else: |
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217 name = e |
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218 path = os.path.join(extpath, e, '__init__.py') |
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219 if not os.path.exists(path): |
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220 continue |
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221 if strip_init: |
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222 path = os.path.dirname(path) |
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223 if name in exts or name in _order or name == '__init__': |
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224 continue |
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225 exts[name] = path |
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226 return exts |
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227 |
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228 def _moduledoc(file): |
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229 '''return the top-level python documentation for the given file |
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230 |
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231 Loosely inspired by pydoc.source_synopsis(), but rewritten to |
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232 handle triple quotes and to return the whole text instead of just |
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233 the synopsis''' |
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234 result = [] |
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235 |
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236 line = file.readline() |
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237 while line[:1] == '#' or not line.strip(): |
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238 line = file.readline() |
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239 if not line: |
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240 break |
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241 |
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242 start = line[:3] |
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243 if start == '"""' or start == "'''": |
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244 line = line[3:] |
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245 while line: |
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246 if line.rstrip().endswith(start): |
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247 line = line.split(start)[0] |
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248 if line: |
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249 result.append(line) |
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250 break |
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251 elif not line: |
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252 return None # unmatched delimiter |
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253 result.append(line) |
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254 line = file.readline() |
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255 else: |
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256 return None |
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257 |
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258 return ''.join(result) |
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259 |
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260 def _disabledhelp(path): |
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261 '''retrieve help synopsis of a disabled extension (without importing)''' |
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262 try: |
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263 file = open(path) |
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264 except IOError: |
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265 return |
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266 else: |
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267 doc = _moduledoc(file) |
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268 file.close() |
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269 |
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270 if doc: # extracting localized synopsis |
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271 return gettext(doc).splitlines()[0] |
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272 else: |
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273 return _('(no help text available)') |
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274 |
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275 def disabled(): |
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276 '''find disabled extensions from hgext. returns a dict of {name: desc}''' |
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277 try: |
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278 from hgext import __index__ |
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279 return dict((name, gettext(desc)) |
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280 for name, desc in __index__.docs.iteritems() |
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281 if name not in _order) |
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282 except (ImportError, AttributeError): |
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283 pass |
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284 |
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285 paths = _disabledpaths() |
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286 if not paths: |
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287 return {} |
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288 |
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289 exts = {} |
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290 for name, path in paths.iteritems(): |
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291 doc = _disabledhelp(path) |
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292 if doc: |
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293 exts[name] = doc |
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294 |
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295 return exts |
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296 |
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297 def disabledext(name): |
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298 '''find a specific disabled extension from hgext. returns desc''' |
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299 try: |
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300 from hgext import __index__ |
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301 if name in _order: # enabled |
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302 return |
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303 else: |
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304 return gettext(__index__.docs.get(name)) |
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305 except (ImportError, AttributeError): |
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306 pass |
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307 |
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308 paths = _disabledpaths() |
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309 if name in paths: |
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310 return _disabledhelp(paths[name]) |
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311 |
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312 def disabledcmd(ui, cmd, strict=False): |
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313 '''import disabled extensions until cmd is found. |
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314 returns (cmdname, extname, module)''' |
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315 |
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316 paths = _disabledpaths(strip_init=True) |
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317 if not paths: |
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318 raise error.UnknownCommand(cmd) |
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319 |
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320 def findcmd(cmd, name, path): |
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321 try: |
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322 mod = loadpath(path, 'hgext.%s' % name) |
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323 except Exception: |
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324 return |
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325 try: |
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326 aliases, entry = cmdutil.findcmd(cmd, |
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327 getattr(mod, 'cmdtable', {}), strict) |
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328 except (error.AmbiguousCommand, error.UnknownCommand): |
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329 return |
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330 except Exception: |
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331 ui.warn(_('warning: error finding commands in %s\n') % path) |
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332 ui.traceback() |
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333 return |
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334 for c in aliases: |
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335 if c.startswith(cmd): |
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336 cmd = c |
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337 break |
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338 else: |
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339 cmd = aliases[0] |
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340 return (cmd, name, mod) |
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341 |
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342 ext = None |
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343 # first, search for an extension with the same name as the command |
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344 path = paths.pop(cmd, None) |
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345 if path: |
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346 ext = findcmd(cmd, cmd, path) |
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347 if not ext: |
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348 # otherwise, interrogate each extension until there's a match |
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349 for name, path in paths.iteritems(): |
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350 ext = findcmd(cmd, name, path) |
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351 if ext: |
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352 break |
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353 if ext and 'DEPRECATED' not in ext.__doc__: |
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354 return ext |
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355 |
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356 raise error.UnknownCommand(cmd) |
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357 |
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358 def enabled(shortname=True): |
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359 '''return a dict of {name: desc} of extensions''' |
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360 exts = {} |
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extensions: move extensions listing functions from mercurial.help
Cédric Duval <cedricduval@free.fr>
parents:
8225
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361 for ename, ext in extensions(): |
20a25042fadc
extensions: move extensions listing functions from mercurial.help
Cédric Duval <cedricduval@free.fr>
parents:
8225
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362 doc = (gettext(ext.__doc__) or _('(no help text available)')) |
19769
83d79a00cc24
help: use full name of extensions to look up them for keyword search
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
18692
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363 if shortname: |
83d79a00cc24
help: use full name of extensions to look up them for keyword search
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
18692
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364 ename = ename.split('.')[-1] |
9136
31177742f54a
for calls expecting bool args, pass bool instead of int
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
9020
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365 exts[ename] = doc.splitlines()[0].strip() |
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20a25042fadc
extensions: move extensions listing functions from mercurial.help
Cédric Duval <cedricduval@free.fr>
parents:
8225
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366 |
14316
d5b525697ddb
extensions: drop maxlength from enabled and disabled
Matt Mackall <mpm@selenic.com>
parents:
14079
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367 return exts |
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ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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368 |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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369 def moduleversion(module): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
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370 '''return version information from given module as a string''' |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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371 if (util.safehasattr(module, 'getversion') |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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372 and callable(module.getversion)): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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373 version = module.getversion() |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
diff
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374 elif util.safehasattr(module, '__version__'): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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375 version = module.__version__ |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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376 else: |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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377 version = '' |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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378 if isinstance(version, (list, tuple)): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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379 version = '.'.join(str(o) for o in version) |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
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380 return version |