Mercurial > hg
annotate mercurial/hook.py @ 12957:9f2ac318b92e
util: clarify purpose of MBTextWrapper class
It's easy to get confused and scared of an Unicode monster when
skimming through this code: document that this is really just
about column-counting.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
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date | Tue, 09 Nov 2010 13:43:35 +0900 |
parents | c37f35d7f2f5 |
children | 789e0fa2fcea |
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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 |
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10 import extensions, util |
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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 obj = funcname |
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24 if not hasattr(obj, '__call__'): |
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25 d = funcname.rfind('.') |
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26 if d == -1: |
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27 raise util.Abort(_('%s hook is invalid ("%s" not in ' |
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28 'a module)') % (hname, funcname)) |
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29 modname = funcname[:d] |
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30 oldpaths = sys.path |
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31 if hasattr(sys, "frozen"): |
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32 # binary installs require sys.path manipulation |
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33 modpath, modfile = os.path.split(modname) |
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34 if modpath and modfile: |
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35 sys.path = sys.path[:] + [modpath] |
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36 modname = modfile |
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37 try: |
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38 obj = __import__(modname) |
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39 except ImportError: |
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40 e1 = sys.exc_type, sys.exc_value, sys.exc_traceback |
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41 try: |
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42 # extensions are loaded with hgext_ prefix |
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43 obj = __import__("hgext_%s" % modname) |
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44 except ImportError: |
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45 e2 = sys.exc_type, sys.exc_value, sys.exc_traceback |
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46 if ui.tracebackflag: |
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47 ui.warn(_('exception from first failed import attempt:\n')) |
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48 ui.traceback(e1) |
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49 if ui.tracebackflag: |
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50 ui.warn(_('exception from second failed import attempt:\n')) |
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51 ui.traceback(e2) |
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52 raise util.Abort(_('%s hook is invalid ' |
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53 '(import of "%s" failed)') % |
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54 (hname, modname)) |
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55 sys.path = oldpaths |
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56 try: |
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57 for p in funcname.split('.')[1:]: |
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58 obj = getattr(obj, p) |
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59 except AttributeError: |
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60 raise util.Abort(_('%s hook is invalid ' |
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61 '("%s" is not defined)') % |
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62 (hname, funcname)) |
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63 if not hasattr(obj, '__call__'): |
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64 raise util.Abort(_('%s hook is invalid ' |
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65 '("%s" is not callable)') % |
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66 (hname, funcname)) |
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67 try: |
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68 r = obj(ui=ui, repo=repo, hooktype=name, **args) |
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69 except KeyboardInterrupt: |
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70 raise |
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71 except Exception, exc: |
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72 if isinstance(exc, util.Abort): |
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73 ui.warn(_('error: %s hook failed: %s\n') % |
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74 (hname, exc.args[0])) |
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75 else: |
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76 ui.warn(_('error: %s hook raised an exception: ' |
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77 '%s\n') % (hname, exc)) |
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78 if throw: |
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79 raise |
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80 ui.traceback() |
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81 return True |
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82 if r: |
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83 if throw: |
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84 raise util.Abort(_('%s hook failed') % hname) |
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85 ui.warn(_('warning: %s hook failed\n') % hname) |
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86 return r |
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87 |
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88 def _exthook(ui, repo, name, cmd, args, throw): |
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89 ui.note(_("running hook %s: %s\n") % (name, cmd)) |
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90 |
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91 env = {} |
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92 for k, v in args.iteritems(): |
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93 if hasattr(v, '__call__'): |
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94 v = v() |
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95 env['HG_' + k.upper()] = v |
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96 |
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97 if repo: |
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98 cwd = repo.root |
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99 else: |
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100 cwd = os.getcwd() |
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101 if 'HG_URL' in env and env['HG_URL'].startswith('remote:http'): |
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102 r = util.system(cmd, environ=env, cwd=cwd, out=ui) |
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103 else: |
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104 r = util.system(cmd, environ=env, cwd=cwd) |
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105 if r: |
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106 desc, r = util.explain_exit(r) |
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107 if throw: |
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108 raise util.Abort(_('%s hook %s') % (name, desc)) |
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109 ui.warn(_('warning: %s hook %s\n') % (name, desc)) |
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110 return r |
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111 |
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112 _redirect = False |
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113 def redirect(state): |
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114 global _redirect |
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115 _redirect = state |
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116 |
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117 def hook(ui, repo, name, throw=False, **args): |
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118 r = False |
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119 |
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120 oldstdout = -1 |
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121 if _redirect: |
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122 stdoutno = sys.__stdout__.fileno() |
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123 stderrno = sys.__stderr__.fileno() |
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124 # temporarily redirect stdout to stderr, if possible |
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125 if stdoutno >= 0 and stderrno >= 0: |
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126 oldstdout = os.dup(stdoutno) |
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127 os.dup2(stderrno, stdoutno) |
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128 |
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129 try: |
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130 for hname, cmd in ui.configitems('hooks'): |
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131 if hname.split('.')[0] != name or not cmd: |
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132 continue |
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133 if hasattr(cmd, '__call__'): |
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134 r = _pythonhook(ui, repo, name, hname, cmd, args, throw) or r |
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135 elif cmd.startswith('python:'): |
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136 if cmd.count(':') >= 2: |
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137 path, cmd = cmd[7:].rsplit(':', 1) |
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138 mod = extensions.loadpath(path, 'hghook.%s' % hname) |
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139 hookfn = getattr(mod, cmd) |
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140 else: |
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141 hookfn = cmd[7:].strip() |
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142 r = _pythonhook(ui, repo, name, hname, hookfn, args, throw) or r |
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143 else: |
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144 r = _exthook(ui, repo, hname, cmd, args, throw) or r |
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145 finally: |
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146 if _redirect and oldstdout >= 0: |
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147 os.dup2(oldstdout, stdoutno) |
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148 os.close(oldstdout) |
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149 |
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150 return r |