Mercurial > hg
annotate mercurial/hook.py @ 19093:6f27efc7db23 stable
hgweb: fix empty navigation detection
For some obscure reason, changelog.node(0) returns nullid if changelog is empty.
this break empty navigation detection. We fix this code by using the length of
the changelog.
Using the length have some issue with revision filtering but this is a small
step in the right direction. Proper fix comes in later changeset.
author | Pierre-Yves David <pierre-yves.david@logilab.fr> |
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date | Tue, 30 Apr 2013 15:11:12 +0200 |
parents | 4f485bd68f1d |
children | aac87f70f38e |
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1 # hook.py - hook support for mercurial |
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2 # |
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3 # Copyright 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 from i18n import _ |
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9 import os, sys, time, types |
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10 import extensions, util, demandimport |
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11 |
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12 def _pythonhook(ui, repo, name, hname, funcname, args, throw): |
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13 '''call python hook. hook is callable object, looked up as |
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14 name in python module. if callable returns "true", hook |
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15 fails, else passes. if hook raises exception, treated as |
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16 hook failure. exception propagates if throw is "true". |
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17 |
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18 reason for "true" meaning "hook failed" is so that |
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19 unmodified commands (e.g. mercurial.commands.update) can |
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20 be run as hooks without wrappers to convert return values.''' |
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21 |
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22 ui.note(_("calling hook %s: %s\n") % (hname, funcname)) |
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23 starttime = time.time() |
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24 |
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25 obj = funcname |
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26 if not util.safehasattr(obj, '__call__'): |
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27 d = funcname.rfind('.') |
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28 if d == -1: |
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29 raise util.Abort(_('%s hook is invalid ("%s" not in ' |
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30 'a module)') % (hname, funcname)) |
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31 modname = funcname[:d] |
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32 oldpaths = sys.path |
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33 if util.mainfrozen(): |
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34 # binary installs require sys.path manipulation |
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35 modpath, modfile = os.path.split(modname) |
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36 if modpath and modfile: |
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37 sys.path = sys.path[:] + [modpath] |
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38 modname = modfile |
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39 try: |
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40 demandimport.disable() |
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41 obj = __import__(modname) |
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42 demandimport.enable() |
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43 except ImportError: |
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44 e1 = sys.exc_type, sys.exc_value, sys.exc_traceback |
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45 try: |
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46 # extensions are loaded with hgext_ prefix |
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47 obj = __import__("hgext_%s" % modname) |
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48 demandimport.enable() |
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49 except ImportError: |
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50 demandimport.enable() |
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51 e2 = sys.exc_type, sys.exc_value, sys.exc_traceback |
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52 if ui.tracebackflag: |
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53 ui.warn(_('exception from first failed import attempt:\n')) |
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54 ui.traceback(e1) |
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55 if ui.tracebackflag: |
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56 ui.warn(_('exception from second failed import attempt:\n')) |
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57 ui.traceback(e2) |
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58 raise util.Abort(_('%s hook is invalid ' |
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59 '(import of "%s" failed)') % |
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60 (hname, modname)) |
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61 sys.path = oldpaths |
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62 try: |
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63 for p in funcname.split('.')[1:]: |
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64 obj = getattr(obj, p) |
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65 except AttributeError: |
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66 raise util.Abort(_('%s hook is invalid ' |
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67 '("%s" is not defined)') % |
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68 (hname, funcname)) |
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69 if not util.safehasattr(obj, '__call__'): |
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70 raise util.Abort(_('%s hook is invalid ' |
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71 '("%s" is not callable)') % |
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72 (hname, funcname)) |
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73 try: |
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74 try: |
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75 # redirect IO descriptors to the ui descriptors so hooks |
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76 # that write directly to these don't mess up the command |
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77 # protocol when running through the command server |
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78 old = sys.stdout, sys.stderr, sys.stdin |
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79 sys.stdout, sys.stderr, sys.stdin = ui.fout, ui.ferr, ui.fin |
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80 |
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81 r = obj(ui=ui, repo=repo, hooktype=name, **args) |
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82 except KeyboardInterrupt: |
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83 raise |
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84 except Exception, exc: |
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85 if isinstance(exc, util.Abort): |
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86 ui.warn(_('error: %s hook failed: %s\n') % |
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87 (hname, exc.args[0])) |
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88 else: |
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89 ui.warn(_('error: %s hook raised an exception: ' |
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90 '%s\n') % (hname, exc)) |
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91 if throw: |
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92 raise |
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93 ui.traceback() |
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94 return True |
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95 finally: |
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96 sys.stdout, sys.stderr, sys.stdin = old |
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97 duration = time.time() - starttime |
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98 readablefunc = funcname |
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99 if isinstance(funcname, types.FunctionType): |
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100 readablefunc = funcname.__module__ + "." + funcname.__name__ |
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101 ui.log('pythonhook', 'pythonhook-%s: %s finished in %0.2f seconds\n', |
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102 name, readablefunc, duration) |
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103 if r: |
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104 if throw: |
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105 raise util.Abort(_('%s hook failed') % hname) |
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106 ui.warn(_('warning: %s hook failed\n') % hname) |
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107 return r |
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108 |
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109 def _exthook(ui, repo, name, cmd, args, throw): |
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110 ui.note(_("running hook %s: %s\n") % (name, cmd)) |
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111 |
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112 starttime = time.time() |
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113 env = {} |
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114 for k, v in args.iteritems(): |
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115 if util.safehasattr(v, '__call__'): |
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116 v = v() |
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117 if isinstance(v, dict): |
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118 # make the dictionary element order stable across Python |
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119 # implementations |
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120 v = ('{' + |
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121 ', '.join('%r: %r' % i for i in sorted(v.iteritems())) + |
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122 '}') |
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123 env['HG_' + k.upper()] = v |
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124 |
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125 if repo: |
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126 cwd = repo.root |
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127 else: |
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128 cwd = os.getcwd() |
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129 if 'HG_URL' in env and env['HG_URL'].startswith('remote:http'): |
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130 r = util.system(cmd, environ=env, cwd=cwd, out=ui) |
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131 else: |
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132 r = util.system(cmd, environ=env, cwd=cwd, out=ui.fout) |
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133 |
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134 duration = time.time() - starttime |
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135 ui.log('exthook', 'exthook-%s: %s finished in %0.2f seconds\n', |
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136 name, cmd, duration) |
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137 if r: |
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138 desc, r = util.explainexit(r) |
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139 if throw: |
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140 raise util.Abort(_('%s hook %s') % (name, desc)) |
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141 ui.warn(_('warning: %s hook %s\n') % (name, desc)) |
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142 return r |
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143 |
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144 def _allhooks(ui): |
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145 hooks = [] |
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146 for name, cmd in ui.configitems('hooks'): |
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147 if not name.startswith('priority'): |
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148 priority = ui.configint('hooks', 'priority.%s' % name, 0) |
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149 hooks.append((-priority, len(hooks), name, cmd)) |
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150 return [(k, v) for p, o, k, v in sorted(hooks)] |
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151 |
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152 _redirect = False |
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153 def redirect(state): |
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154 global _redirect |
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155 _redirect = state |
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156 |
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157 def hook(ui, repo, name, throw=False, **args): |
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158 if not ui.callhooks: |
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159 return False |
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160 |
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161 r = False |
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162 oldstdout = -1 |
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163 |
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164 try: |
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165 for hname, cmd in _allhooks(ui): |
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166 if hname.split('.')[0] != name or not cmd: |
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167 continue |
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168 |
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169 if oldstdout == -1 and _redirect: |
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170 try: |
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171 stdoutno = sys.__stdout__.fileno() |
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172 stderrno = sys.__stderr__.fileno() |
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173 # temporarily redirect stdout to stderr, if possible |
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174 if stdoutno >= 0 and stderrno >= 0: |
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175 sys.__stdout__.flush() |
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176 oldstdout = os.dup(stdoutno) |
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177 os.dup2(stderrno, stdoutno) |
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178 except (OSError, AttributeError): |
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179 # files seem to be bogus, give up on redirecting (WSGI, etc) |
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180 pass |
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181 |
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182 if util.safehasattr(cmd, '__call__'): |
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183 r = _pythonhook(ui, repo, name, hname, cmd, args, throw) or r |
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184 elif cmd.startswith('python:'): |
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185 if cmd.count(':') >= 2: |
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186 path, cmd = cmd[7:].rsplit(':', 1) |
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187 path = util.expandpath(path) |
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188 if repo: |
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189 path = os.path.join(repo.root, path) |
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190 try: |
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191 mod = extensions.loadpath(path, 'hghook.%s' % hname) |
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192 except Exception: |
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193 ui.write(_("loading %s hook failed:\n") % hname) |
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194 raise |
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195 hookfn = getattr(mod, cmd) |
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196 else: |
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197 hookfn = cmd[7:].strip() |
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198 r = _pythonhook(ui, repo, name, hname, hookfn, args, throw) or r |
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199 else: |
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200 r = _exthook(ui, repo, hname, cmd, args, throw) or r |
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201 finally: |
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202 if _redirect and oldstdout >= 0: |
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203 os.dup2(oldstdout, stdoutno) |
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204 os.close(oldstdout) |
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205 |
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206 return r |