Mercurial > hg
annotate mercurial/hook.py @ 32129:f0ea0f642627
py3: make posix.getuser return a bytes
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Fri, 21 Apr 2017 00:53:38 +0530 |
parents | aff7b32b3c05 |
children | 4b426ae96ff2 |
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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 __future__ import absolute_import |
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9 |
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10 import os |
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11 import sys |
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12 |
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13 from .i18n import _ |
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14 from . import ( |
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15 demandimport, |
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16 error, |
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17 extensions, |
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18 pycompat, |
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19 util, |
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20 ) |
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21 |
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22 def _pythonhook(ui, repo, htype, hname, funcname, args, throw): |
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23 '''call python hook. hook is callable object, looked up as |
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24 name in python module. if callable returns "true", hook |
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25 fails, else passes. if hook raises exception, treated as |
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26 hook failure. exception propagates if throw is "true". |
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27 |
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28 reason for "true" meaning "hook failed" is so that |
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29 unmodified commands (e.g. mercurial.commands.update) can |
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30 be run as hooks without wrappers to convert return values.''' |
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31 |
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32 if callable(funcname): |
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33 obj = funcname |
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34 funcname = obj.__module__ + "." + obj.__name__ |
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35 else: |
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36 d = funcname.rfind('.') |
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37 if d == -1: |
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38 raise error.HookLoadError( |
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39 _('%s hook is invalid: "%s" not in a module') |
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40 % (hname, funcname)) |
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41 modname = funcname[:d] |
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42 oldpaths = sys.path |
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43 if util.mainfrozen(): |
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44 # binary installs require sys.path manipulation |
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45 modpath, modfile = os.path.split(modname) |
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46 if modpath and modfile: |
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47 sys.path = sys.path[:] + [modpath] |
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48 modname = modfile |
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49 with demandimport.deactivated(): |
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50 try: |
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51 obj = __import__(modname) |
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52 except (ImportError, SyntaxError): |
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53 e1 = sys.exc_info() |
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54 try: |
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55 # extensions are loaded with hgext_ prefix |
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56 obj = __import__("hgext_%s" % modname) |
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57 except (ImportError, SyntaxError): |
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58 e2 = sys.exc_info() |
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59 if ui.tracebackflag: |
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60 ui.warn(_('exception from first failed import ' |
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61 'attempt:\n')) |
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62 ui.traceback(e1) |
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63 if ui.tracebackflag: |
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64 ui.warn(_('exception from second failed import ' |
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65 'attempt:\n')) |
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66 ui.traceback(e2) |
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67 |
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68 if not ui.tracebackflag: |
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69 tracebackhint = _( |
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70 'run with --traceback for stack trace') |
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71 else: |
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72 tracebackhint = None |
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73 raise error.HookLoadError( |
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74 _('%s hook is invalid: import of "%s" failed') % |
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75 (hname, modname), hint=tracebackhint) |
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76 sys.path = oldpaths |
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77 try: |
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78 for p in funcname.split('.')[1:]: |
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79 obj = getattr(obj, p) |
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80 except AttributeError: |
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81 raise error.HookLoadError( |
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82 _('%s hook is invalid: "%s" is not defined') |
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83 % (hname, funcname)) |
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84 if not callable(obj): |
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85 raise error.HookLoadError( |
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86 _('%s hook is invalid: "%s" is not callable') |
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87 % (hname, funcname)) |
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88 |
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89 ui.note(_("calling hook %s: %s\n") % (hname, funcname)) |
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90 starttime = util.timer() |
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91 |
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92 try: |
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93 r = obj(ui=ui, repo=repo, hooktype=htype, **args) |
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94 except Exception as exc: |
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95 if isinstance(exc, error.Abort): |
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96 ui.warn(_('error: %s hook failed: %s\n') % |
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97 (hname, exc.args[0])) |
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98 else: |
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99 ui.warn(_('error: %s hook raised an exception: ' |
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100 '%s\n') % (hname, exc)) |
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101 if throw: |
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102 raise |
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103 if not ui.tracebackflag: |
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104 ui.warn(_('(run with --traceback for stack trace)\n')) |
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105 ui.traceback() |
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106 return True, True |
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107 finally: |
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108 duration = util.timer() - starttime |
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109 ui.log('pythonhook', 'pythonhook-%s: %s finished in %0.2f seconds\n', |
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110 htype, funcname, duration) |
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111 if r: |
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112 if throw: |
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113 raise error.HookAbort(_('%s hook failed') % hname) |
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114 ui.warn(_('warning: %s hook failed\n') % hname) |
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115 return r, False |
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116 |
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117 def _exthook(ui, repo, htype, name, cmd, args, throw): |
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118 ui.note(_("running hook %s: %s\n") % (name, cmd)) |
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119 |
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120 starttime = util.timer() |
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121 env = {} |
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122 |
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123 # make in-memory changes visible to external process |
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124 if repo is not None: |
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125 tr = repo.currenttransaction() |
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126 repo.dirstate.write(tr) |
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127 if tr and tr.writepending(): |
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128 env['HG_PENDING'] = repo.root |
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129 env['HG_HOOKTYPE'] = htype |
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130 env['HG_HOOKNAME'] = name |
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131 |
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132 for k, v in args.iteritems(): |
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133 if callable(v): |
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134 v = v() |
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135 if isinstance(v, dict): |
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136 # make the dictionary element order stable across Python |
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137 # implementations |
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138 v = ('{' + |
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139 ', '.join('%r: %r' % i for i in sorted(v.iteritems())) + |
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140 '}') |
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141 env['HG_' + k.upper()] = v |
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142 |
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143 if repo: |
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144 cwd = repo.root |
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145 else: |
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146 cwd = pycompat.getcwd() |
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147 r = ui.system(cmd, environ=env, cwd=cwd, blockedtag='exthook-%s' % (name,)) |
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148 |
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149 duration = util.timer() - starttime |
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150 ui.log('exthook', 'exthook-%s: %s finished in %0.2f seconds\n', |
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151 name, cmd, duration) |
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152 if r: |
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153 desc, r = util.explainexit(r) |
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154 if throw: |
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155 raise error.HookAbort(_('%s hook %s') % (name, desc)) |
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156 ui.warn(_('warning: %s hook %s\n') % (name, desc)) |
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157 return r |
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158 |
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159 # represent an untrusted hook command |
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160 _fromuntrusted = object() |
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161 |
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162 def _allhooks(ui): |
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163 """return a list of (hook-id, cmd) pairs sorted by priority""" |
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164 hooks = _hookitems(ui) |
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165 # Be careful in this section, propagating the real commands from untrusted |
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166 # sources would create a security vulnerability, make sure anything altered |
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167 # in that section uses "_fromuntrusted" as its command. |
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168 untrustedhooks = _hookitems(ui, _untrusted=True) |
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169 for name, value in untrustedhooks.items(): |
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170 trustedvalue = hooks.get(name, (None, None, name, _fromuntrusted)) |
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171 if value != trustedvalue: |
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172 (lp, lo, lk, lv) = trustedvalue |
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173 hooks[name] = (lp, lo, lk, _fromuntrusted) |
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174 # (end of the security sensitive section) |
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175 return [(k, v) for p, o, k, v in sorted(hooks.values())] |
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176 |
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177 def _hookitems(ui, _untrusted=False): |
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178 """return all hooks items ready to be sorted""" |
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179 hooks = {} |
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180 for name, cmd in ui.configitems('hooks', untrusted=_untrusted): |
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181 if not name.startswith('priority'): |
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182 priority = ui.configint('hooks', 'priority.%s' % name, 0) |
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183 hooks[name] = (-priority, len(hooks), name, cmd) |
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184 return hooks |
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185 |
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186 _redirect = False |
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187 def redirect(state): |
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188 global _redirect |
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189 _redirect = state |
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190 |
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191 def hook(ui, repo, htype, throw=False, **args): |
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192 if not ui.callhooks: |
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193 return False |
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194 |
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195 hooks = [] |
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196 for hname, cmd in _allhooks(ui): |
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197 if hname.split('.')[0] == htype and cmd: |
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198 hooks.append((hname, cmd)) |
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199 |
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200 res = runhooks(ui, repo, htype, hooks, throw=throw, **args) |
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201 r = False |
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202 for hname, cmd in hooks: |
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203 r = res[hname][0] or r |
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204 return r |
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205 |
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206 def runhooks(ui, repo, htype, hooks, throw=False, **args): |
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207 res = {} |
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208 oldstdout = -1 |
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209 |
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210 try: |
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211 for hname, cmd in hooks: |
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212 if oldstdout == -1 and _redirect: |
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213 try: |
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214 stdoutno = util.stdout.fileno() |
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215 stderrno = util.stderr.fileno() |
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216 # temporarily redirect stdout to stderr, if possible |
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217 if stdoutno >= 0 and stderrno >= 0: |
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218 util.stdout.flush() |
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219 oldstdout = os.dup(stdoutno) |
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220 os.dup2(stderrno, stdoutno) |
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221 except (OSError, AttributeError): |
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222 # files seem to be bogus, give up on redirecting (WSGI, etc) |
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223 pass |
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224 |
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225 if cmd is _fromuntrusted: |
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226 if throw: |
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227 raise error.HookAbort( |
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228 _('untrusted hook %s not executed') % hname, |
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229 hint = _("see 'hg help config.trusted'")) |
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230 ui.warn(_('warning: untrusted hook %s not executed\n') % hname) |
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231 r = 1 |
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232 raised = False |
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233 elif callable(cmd): |
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234 r, raised = _pythonhook(ui, repo, htype, hname, cmd, args, |
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235 throw) |
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236 elif cmd.startswith('python:'): |
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237 if cmd.count(':') >= 2: |
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238 path, cmd = cmd[7:].rsplit(':', 1) |
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239 path = util.expandpath(path) |
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240 if repo: |
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241 path = os.path.join(repo.root, path) |
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242 try: |
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243 mod = extensions.loadpath(path, 'hghook.%s' % hname) |
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244 except Exception: |
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245 ui.write(_("loading %s hook failed:\n") % hname) |
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246 raise |
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247 hookfn = getattr(mod, cmd) |
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248 else: |
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249 hookfn = cmd[7:].strip() |
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250 r, raised = _pythonhook(ui, repo, htype, hname, hookfn, args, |
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251 throw) |
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252 else: |
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253 r = _exthook(ui, repo, htype, hname, cmd, args, throw) |
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254 raised = False |
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255 |
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256 res[hname] = r, raised |
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257 |
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258 # The stderr is fully buffered on Windows when connected to a pipe. |
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259 # A forcible flush is required to make small stderr data in the |
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260 # remote side available to the client immediately. |
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261 util.stderr.flush() |
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262 finally: |
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263 if _redirect and oldstdout >= 0: |
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264 util.stdout.flush() # write hook output to stderr fd |
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265 os.dup2(oldstdout, stdoutno) |
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266 os.close(oldstdout) |
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267 |
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268 return res |