Mercurial > hg
annotate mercurial/extensions.py @ 13872:e6bd5b403de0
localrepo: tighten except clause when looking rev
author | Idan Kamara <idankk86@gmail.com> |
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date | Mon, 04 Apr 2011 18:05:14 +0300 |
parents | d4ab9486e514 |
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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, help, 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'] |
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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 try: |
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25 return _extensions[name] |
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26 except KeyError: |
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27 for k, v in _extensions.iteritems(): |
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28 if k.endswith('.' + name) or k.endswith('/' + name): |
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29 return v |
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30 raise KeyError(name) |
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31 |
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32 def loadpath(path, module_name): |
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33 module_name = module_name.replace('.', '_') |
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34 path = util.expandpath(path) |
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35 if os.path.isdir(path): |
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36 # module/__init__.py style |
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37 d, f = os.path.split(path.rstrip('/')) |
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38 fd, fpath, desc = imp.find_module(f, [d]) |
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39 return imp.load_module(module_name, fd, fpath, desc) |
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40 else: |
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41 return imp.load_source(module_name, path) |
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42 |
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43 def load(ui, name, path): |
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44 # unused ui argument kept for backwards compatibility |
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45 if name.startswith('hgext.') or name.startswith('hgext/'): |
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46 shortname = name[6:] |
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47 else: |
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48 shortname = name |
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49 if shortname in _ignore: |
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50 return None |
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51 if shortname in _extensions: |
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52 return _extensions[shortname] |
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53 _extensions[shortname] = None |
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54 if path: |
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55 # the module will be loaded in sys.modules |
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56 # choose an unique name so that it doesn't |
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57 # conflicts with other modules |
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58 mod = loadpath(path, 'hgext.%s' % name) |
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59 else: |
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60 def importh(name): |
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61 mod = __import__(name) |
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62 components = name.split('.') |
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63 for comp in components[1:]: |
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64 mod = getattr(mod, comp) |
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65 return mod |
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66 try: |
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67 mod = importh("hgext.%s" % name) |
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68 except ImportError: |
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69 mod = importh(name) |
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70 _extensions[shortname] = mod |
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71 _order.append(shortname) |
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72 return mod |
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73 |
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74 def loadall(ui): |
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75 result = ui.configitems("extensions") |
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76 newindex = len(_order) |
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77 for (name, path) in result: |
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78 if path: |
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79 if path[0] == '!': |
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80 continue |
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81 try: |
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82 load(ui, name, path) |
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83 except KeyboardInterrupt: |
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84 raise |
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85 except Exception, inst: |
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86 if path: |
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87 ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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88 % (name, path, inst)) |
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89 else: |
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90 ui.warn(_("*** failed to import extension %s: %s\n") |
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91 % (name, inst)) |
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92 if ui.traceback(): |
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93 return 1 |
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94 |
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95 for name in _order[newindex:]: |
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96 uisetup = getattr(_extensions[name], 'uisetup', None) |
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97 if uisetup: |
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98 uisetup(ui) |
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99 |
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100 for name in _order[newindex:]: |
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101 extsetup = getattr(_extensions[name], 'extsetup', None) |
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102 if extsetup: |
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103 try: |
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104 extsetup(ui) |
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105 except TypeError: |
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106 if extsetup.func_code.co_argcount != 0: |
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107 raise |
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108 extsetup() # old extsetup with no ui argument |
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109 |
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110 def wrapcommand(table, command, wrapper): |
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111 '''Wrap the command named `command' in table |
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112 |
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113 Replace command in the command table with wrapper. The wrapped command will |
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114 be inserted into the command table specified by the table argument. |
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115 |
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116 The wrapper will be called like |
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117 |
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118 wrapper(orig, *args, **kwargs) |
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119 |
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120 where orig is the original (wrapped) function, and *args, **kwargs |
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121 are the arguments passed to it. |
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122 ''' |
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123 assert hasattr(wrapper, '__call__') |
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124 aliases, entry = cmdutil.findcmd(command, table) |
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125 for alias, e in table.iteritems(): |
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126 if e is entry: |
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127 key = alias |
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128 break |
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129 |
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130 origfn = entry[0] |
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131 def wrap(*args, **kwargs): |
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132 return util.checksignature(wrapper)( |
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133 util.checksignature(origfn), *args, **kwargs) |
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134 |
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135 wrap.__doc__ = getattr(origfn, '__doc__') |
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136 wrap.__module__ = getattr(origfn, '__module__') |
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137 |
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138 newentry = list(entry) |
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139 newentry[0] = wrap |
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140 table[key] = tuple(newentry) |
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141 return entry |
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142 |
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143 def wrapfunction(container, funcname, wrapper): |
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144 '''Wrap the function named funcname in container |
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145 |
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146 Replace the funcname member in the given container with the specified |
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147 wrapper. The container is typically a module, class, or instance. |
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148 |
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149 The wrapper will be called like |
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150 |
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151 wrapper(orig, *args, **kwargs) |
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152 |
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153 where orig is the original (wrapped) function, and *args, **kwargs |
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154 are the arguments passed to it. |
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155 |
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156 Wrapping methods of the repository object is not recommended since |
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157 it conflicts with extensions that extend the repository by |
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158 subclassing. All extensions that need to extend methods of |
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159 localrepository should use this subclassing trick: namely, |
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160 reposetup() should look like |
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161 |
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162 def reposetup(ui, repo): |
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163 class myrepo(repo.__class__): |
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164 def whatever(self, *args, **kwargs): |
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165 [...extension stuff...] |
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166 super(myrepo, self).whatever(*args, **kwargs) |
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167 [...extension stuff...] |
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168 |
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169 repo.__class__ = myrepo |
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170 |
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171 In general, combining wrapfunction() with subclassing does not |
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172 work. Since you cannot control what other extensions are loaded by |
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173 your end users, you should play nicely with others by using the |
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174 subclass trick. |
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175 ''' |
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176 assert hasattr(wrapper, '__call__') |
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177 def wrap(*args, **kwargs): |
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178 return wrapper(origfn, *args, **kwargs) |
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179 |
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180 origfn = getattr(container, funcname) |
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181 assert hasattr(origfn, '__call__') |
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182 setattr(container, funcname, wrap) |
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183 return origfn |
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184 |
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185 def _disabledpaths(strip_init=False): |
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186 '''find paths of disabled extensions. returns a dict of {name: path} |
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187 removes /__init__.py from packages if strip_init is True''' |
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188 import hgext |
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189 extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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190 try: # might not be a filesystem path |
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191 files = os.listdir(extpath) |
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192 except OSError: |
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193 return {} |
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194 |
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195 exts = {} |
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196 for e in files: |
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197 if e.endswith('.py'): |
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198 name = e.rsplit('.', 1)[0] |
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199 path = os.path.join(extpath, e) |
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200 else: |
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201 name = e |
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202 path = os.path.join(extpath, e, '__init__.py') |
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203 if not os.path.exists(path): |
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204 continue |
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205 if strip_init: |
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206 path = os.path.dirname(path) |
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207 if name in exts or name in _order or name == '__init__': |
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208 continue |
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209 exts[name] = path |
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210 return exts |
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211 |
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212 def _disabledhelp(path): |
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213 '''retrieve help synopsis of a disabled extension (without importing)''' |
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214 try: |
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215 file = open(path) |
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216 except IOError: |
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217 return |
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218 else: |
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219 doc = help.moduledoc(file) |
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220 file.close() |
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221 |
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222 if doc: # extracting localized synopsis |
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223 return gettext(doc).splitlines()[0] |
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224 else: |
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225 return _('(no help text available)') |
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226 |
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227 def disabled(): |
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228 '''find disabled extensions from hgext |
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229 returns a dict of {name: desc}, and the max name length''' |
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230 |
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231 paths = _disabledpaths() |
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232 if not paths: |
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233 return None, 0 |
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234 |
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235 exts = {} |
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236 maxlength = 0 |
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237 for name, path in paths.iteritems(): |
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238 doc = _disabledhelp(path) |
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239 if not doc: |
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240 continue |
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241 |
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242 exts[name] = doc |
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243 if len(name) > maxlength: |
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244 maxlength = len(name) |
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245 |
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246 return exts, maxlength |
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247 |
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248 def disabledext(name): |
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249 '''find a specific disabled extension from hgext. returns desc''' |
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250 paths = _disabledpaths() |
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251 if name in paths: |
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252 return _disabledhelp(paths[name]) |
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253 |
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254 def disabledcmd(ui, cmd, strict=False): |
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255 '''import disabled extensions until cmd is found. |
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256 returns (cmdname, extname, doc)''' |
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257 |
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258 paths = _disabledpaths(strip_init=True) |
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259 if not paths: |
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260 raise error.UnknownCommand(cmd) |
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261 |
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262 def findcmd(cmd, name, path): |
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263 try: |
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264 mod = loadpath(path, 'hgext.%s' % name) |
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265 except Exception: |
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266 return |
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267 try: |
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268 aliases, entry = cmdutil.findcmd(cmd, |
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269 getattr(mod, 'cmdtable', {}), strict) |
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270 except (error.AmbiguousCommand, error.UnknownCommand): |
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271 return |
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272 except Exception: |
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273 ui.warn(_('warning: error finding commands in %s\n') % path) |
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274 ui.traceback() |
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275 return |
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276 for c in aliases: |
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277 if c.startswith(cmd): |
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278 cmd = c |
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279 break |
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280 else: |
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281 cmd = aliases[0] |
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282 return (cmd, name, mod) |
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283 |
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284 # first, search for an extension with the same name as the command |
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285 path = paths.pop(cmd, None) |
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286 if path: |
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287 ext = findcmd(cmd, cmd, path) |
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288 if ext: |
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289 return ext |
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290 |
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291 # otherwise, interrogate each extension until there's a match |
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292 for name, path in paths.iteritems(): |
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293 ext = findcmd(cmd, name, path) |
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294 if ext: |
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295 return ext |
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296 |
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297 raise error.UnknownCommand(cmd) |
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298 |
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299 def enabled(): |
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300 '''return a dict of {name: desc} of extensions, and the max name length''' |
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301 exts = {} |
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302 maxlength = 0 |
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303 for ename, ext in extensions(): |
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304 doc = (gettext(ext.__doc__) or _('(no help text available)')) |
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305 ename = ename.split('.')[-1] |
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306 maxlength = max(len(ename), maxlength) |
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307 exts[ename] = doc.splitlines()[0].strip() |
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308 |
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309 return exts, maxlength |