Mercurial > hg
annotate mercurial/extensions.py @ 17817:b17be267b59c
scmutil: add function to validate new branch, tag, and bookmark names
For now the new function only checks to make sure the new label name
isn't a reserved name ('tip', '.', or 'null'). Eventually more of the
checks will be unified between the different types of labels.
The `tag` command is trivially updated to use it. Updating branches and
bookmarks to use it is slightly more invasive and thus reserved for
later patches.
author | Kevin Bullock <kbullock@ringworld.org> |
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date | Wed, 17 Oct 2012 16:34:46 -0500 |
parents | 1b2b727a885f |
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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'] |
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15 |
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16 def extensions(): |
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17 for name in _order: |
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18 module = _extensions[name] |
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19 if module: |
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20 yield name, module |
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21 |
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22 def find(name): |
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23 '''return module with given extension name''' |
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24 mod = None |
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25 try: |
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26 mod = _extensions[name] |
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27 except KeyError: |
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28 for k, v in _extensions.iteritems(): |
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29 if k.endswith('.' + name) or k.endswith('/' + name): |
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30 mod = v |
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31 break |
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32 if not mod: |
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33 raise KeyError(name) |
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34 return mod |
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35 |
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36 def loadpath(path, module_name): |
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37 module_name = module_name.replace('.', '_') |
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38 path = util.expandpath(path) |
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39 if os.path.isdir(path): |
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40 # module/__init__.py style |
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41 d, f = os.path.split(path.rstrip('/')) |
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42 fd, fpath, desc = imp.find_module(f, [d]) |
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43 return imp.load_module(module_name, fd, fpath, desc) |
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44 else: |
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45 try: |
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46 return imp.load_source(module_name, path) |
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47 except IOError, exc: |
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48 if not exc.filename: |
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49 exc.filename = path # python does not fill this |
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50 raise |
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51 |
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52 def load(ui, name, path): |
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53 # unused ui argument kept for backwards compatibility |
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54 if name.startswith('hgext.') or name.startswith('hgext/'): |
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55 shortname = name[6:] |
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56 else: |
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57 shortname = name |
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58 if shortname in _ignore: |
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59 return None |
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60 if shortname in _extensions: |
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61 return _extensions[shortname] |
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62 _extensions[shortname] = None |
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63 if path: |
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64 # the module will be loaded in sys.modules |
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65 # choose an unique name so that it doesn't |
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66 # conflicts with other modules |
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67 mod = loadpath(path, 'hgext.%s' % name) |
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68 else: |
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69 def importh(name): |
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70 mod = __import__(name) |
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71 components = name.split('.') |
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72 for comp in components[1:]: |
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73 mod = getattr(mod, comp) |
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74 return mod |
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75 try: |
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76 mod = importh("hgext.%s" % name) |
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77 except ImportError, err: |
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78 ui.debug('could not import hgext.%s (%s): trying %s\n' |
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79 % (name, err, name)) |
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80 mod = importh(name) |
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81 _extensions[shortname] = mod |
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82 _order.append(shortname) |
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83 return mod |
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84 |
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85 def loadall(ui): |
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86 result = ui.configitems("extensions") |
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87 newindex = len(_order) |
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88 for (name, path) in result: |
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89 if path: |
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90 if path[0] == '!': |
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91 continue |
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92 try: |
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93 load(ui, name, path) |
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94 except KeyboardInterrupt: |
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95 raise |
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96 except Exception, inst: |
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97 if path: |
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98 ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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99 % (name, path, inst)) |
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100 else: |
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101 ui.warn(_("*** failed to import extension %s: %s\n") |
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102 % (name, inst)) |
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103 if ui.traceback(): |
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104 return 1 |
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105 |
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106 for name in _order[newindex:]: |
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107 uisetup = getattr(_extensions[name], 'uisetup', None) |
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108 if uisetup: |
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109 uisetup(ui) |
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110 |
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111 for name in _order[newindex:]: |
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112 extsetup = getattr(_extensions[name], 'extsetup', None) |
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113 if extsetup: |
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114 try: |
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115 extsetup(ui) |
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116 except TypeError: |
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117 if extsetup.func_code.co_argcount != 0: |
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118 raise |
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119 extsetup() # old extsetup with no ui argument |
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120 |
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121 def wrapcommand(table, command, wrapper): |
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122 '''Wrap the command named `command' in table |
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123 |
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124 Replace command in the command table with wrapper. The wrapped command will |
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125 be inserted into the command table specified by the table argument. |
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126 |
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127 The wrapper will be called like |
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128 |
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129 wrapper(orig, *args, **kwargs) |
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130 |
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131 where orig is the original (wrapped) function, and *args, **kwargs |
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132 are the arguments passed to it. |
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133 ''' |
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134 assert util.safehasattr(wrapper, '__call__') |
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135 aliases, entry = cmdutil.findcmd(command, table) |
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136 for alias, e in table.iteritems(): |
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137 if e is entry: |
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138 key = alias |
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139 break |
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140 |
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141 origfn = entry[0] |
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142 def wrap(*args, **kwargs): |
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143 return util.checksignature(wrapper)( |
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144 util.checksignature(origfn), *args, **kwargs) |
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145 |
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146 wrap.__doc__ = getattr(origfn, '__doc__') |
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147 wrap.__module__ = getattr(origfn, '__module__') |
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148 |
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149 newentry = list(entry) |
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150 newentry[0] = wrap |
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151 table[key] = tuple(newentry) |
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152 return entry |
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153 |
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154 def wrapfunction(container, funcname, wrapper): |
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155 '''Wrap the function named funcname in container |
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156 |
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157 Replace the funcname member in the given container with the specified |
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158 wrapper. The container is typically a module, class, or instance. |
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159 |
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160 The wrapper will be called like |
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161 |
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162 wrapper(orig, *args, **kwargs) |
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163 |
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164 where orig is the original (wrapped) function, and *args, **kwargs |
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165 are the arguments passed to it. |
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166 |
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167 Wrapping methods of the repository object is not recommended since |
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168 it conflicts with extensions that extend the repository by |
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169 subclassing. All extensions that need to extend methods of |
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170 localrepository should use this subclassing trick: namely, |
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171 reposetup() should look like |
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172 |
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173 def reposetup(ui, repo): |
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174 class myrepo(repo.__class__): |
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175 def whatever(self, *args, **kwargs): |
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176 [...extension stuff...] |
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177 super(myrepo, self).whatever(*args, **kwargs) |
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178 [...extension stuff...] |
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179 |
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180 repo.__class__ = myrepo |
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181 |
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182 In general, combining wrapfunction() with subclassing does not |
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183 work. Since you cannot control what other extensions are loaded by |
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184 your end users, you should play nicely with others by using the |
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185 subclass trick. |
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186 ''' |
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187 assert util.safehasattr(wrapper, '__call__') |
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188 def wrap(*args, **kwargs): |
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189 return wrapper(origfn, *args, **kwargs) |
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190 |
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191 origfn = getattr(container, funcname) |
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192 assert util.safehasattr(origfn, '__call__') |
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193 setattr(container, funcname, wrap) |
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194 return origfn |
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195 |
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196 def _disabledpaths(strip_init=False): |
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197 '''find paths of disabled extensions. returns a dict of {name: path} |
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198 removes /__init__.py from packages if strip_init is True''' |
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199 import hgext |
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200 extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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201 try: # might not be a filesystem path |
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202 files = os.listdir(extpath) |
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203 except OSError: |
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204 return {} |
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205 |
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206 exts = {} |
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207 for e in files: |
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208 if e.endswith('.py'): |
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209 name = e.rsplit('.', 1)[0] |
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210 path = os.path.join(extpath, e) |
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211 else: |
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212 name = e |
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213 path = os.path.join(extpath, e, '__init__.py') |
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214 if not os.path.exists(path): |
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215 continue |
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216 if strip_init: |
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217 path = os.path.dirname(path) |
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218 if name in exts or name in _order or name == '__init__': |
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219 continue |
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220 exts[name] = path |
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221 return exts |
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222 |
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223 def _moduledoc(file): |
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224 '''return the top-level python documentation for the given file |
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225 |
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226 Loosely inspired by pydoc.source_synopsis(), but rewritten to |
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227 handle triple quotes and to return the whole text instead of just |
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228 the synopsis''' |
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229 result = [] |
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230 |
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231 line = file.readline() |
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232 while line[:1] == '#' or not line.strip(): |
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233 line = file.readline() |
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234 if not line: |
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235 break |
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236 |
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237 start = line[:3] |
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238 if start == '"""' or start == "'''": |
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239 line = line[3:] |
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240 while line: |
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241 if line.rstrip().endswith(start): |
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242 line = line.split(start)[0] |
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243 if line: |
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244 result.append(line) |
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245 break |
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246 elif not line: |
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247 return None # unmatched delimiter |
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248 result.append(line) |
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249 line = file.readline() |
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250 else: |
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251 return None |
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252 |
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253 return ''.join(result) |
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254 |
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255 def _disabledhelp(path): |
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256 '''retrieve help synopsis of a disabled extension (without importing)''' |
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257 try: |
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258 file = open(path) |
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259 except IOError: |
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260 return |
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261 else: |
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262 doc = _moduledoc(file) |
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263 file.close() |
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264 |
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265 if doc: # extracting localized synopsis |
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266 return gettext(doc).splitlines()[0] |
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267 else: |
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268 return _('(no help text available)') |
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269 |
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270 def disabled(): |
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271 '''find disabled extensions from hgext. returns a dict of {name: desc}''' |
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272 try: |
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273 from hgext import __index__ |
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274 return dict((name, gettext(desc)) |
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275 for name, desc in __index__.docs.iteritems() |
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276 if name not in _order) |
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277 except ImportError: |
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278 pass |
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279 |
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280 paths = _disabledpaths() |
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281 if not paths: |
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282 return {} |
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283 |
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284 exts = {} |
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285 for name, path in paths.iteritems(): |
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286 doc = _disabledhelp(path) |
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287 if doc: |
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288 exts[name] = doc |
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289 |
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290 return exts |
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291 |
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292 def disabledext(name): |
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293 '''find a specific disabled extension from hgext. returns desc''' |
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294 try: |
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295 from hgext import __index__ |
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296 if name in _order: # enabled |
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297 return |
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298 else: |
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299 return gettext(__index__.docs.get(name)) |
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300 except ImportError: |
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301 pass |
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302 |
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303 paths = _disabledpaths() |
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304 if name in paths: |
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305 return _disabledhelp(paths[name]) |
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306 |
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307 def disabledcmd(ui, cmd, strict=False): |
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308 '''import disabled extensions until cmd is found. |
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309 returns (cmdname, extname, module)''' |
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310 |
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311 paths = _disabledpaths(strip_init=True) |
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312 if not paths: |
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313 raise error.UnknownCommand(cmd) |
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314 |
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315 def findcmd(cmd, name, path): |
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316 try: |
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317 mod = loadpath(path, 'hgext.%s' % name) |
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318 except Exception: |
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319 return |
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320 try: |
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321 aliases, entry = cmdutil.findcmd(cmd, |
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322 getattr(mod, 'cmdtable', {}), strict) |
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323 except (error.AmbiguousCommand, error.UnknownCommand): |
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324 return |
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325 except Exception: |
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326 ui.warn(_('warning: error finding commands in %s\n') % path) |
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327 ui.traceback() |
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328 return |
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329 for c in aliases: |
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330 if c.startswith(cmd): |
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331 cmd = c |
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332 break |
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333 else: |
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334 cmd = aliases[0] |
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335 return (cmd, name, mod) |
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336 |
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337 ext = None |
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338 # first, search for an extension with the same name as the command |
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339 path = paths.pop(cmd, None) |
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340 if path: |
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341 ext = findcmd(cmd, cmd, path) |
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342 if not ext: |
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343 # otherwise, interrogate each extension until there's a match |
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344 for name, path in paths.iteritems(): |
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345 ext = findcmd(cmd, name, path) |
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346 if ext: |
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347 break |
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348 if ext and 'DEPRECATED' not in ext.__doc__: |
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349 return ext |
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350 |
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351 raise error.UnknownCommand(cmd) |
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352 |
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353 def enabled(): |
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354 '''return a dict of {name: desc} of extensions''' |
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355 exts = {} |
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356 for ename, ext in extensions(): |
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357 doc = (gettext(ext.__doc__) or _('(no help text available)')) |
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358 ename = ename.split('.')[-1] |
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359 exts[ename] = doc.splitlines()[0].strip() |
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360 |
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361 return exts |