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1 | 1 | # hook.py - hook support for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2007 Matt Mackall <mpm@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | from i18n import _ |
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9 | import os, sys | |
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9 | import os, sys, time, types | |
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10 | 10 | import extensions, util, demandimport |
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11 | 11 | |
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12 | 12 | def _pythonhook(ui, repo, name, hname, funcname, args, throw): |
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13 | 13 | '''call python hook. hook is callable object, looked up as |
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14 | 14 | name in python module. if callable returns "true", hook |
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15 | 15 | fails, else passes. if hook raises exception, treated as |
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16 | 16 | hook failure. exception propagates if throw is "true". |
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17 | 17 | |
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18 | 18 | reason for "true" meaning "hook failed" is so that |
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19 | 19 | unmodified commands (e.g. mercurial.commands.update) can |
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20 | 20 | be run as hooks without wrappers to convert return values.''' |
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21 | 21 | |
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22 | 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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23 | 25 | obj = funcname |
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24 | 26 | if not util.safehasattr(obj, '__call__'): |
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25 | 27 | d = funcname.rfind('.') |
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26 | 28 | if d == -1: |
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27 | 29 | raise util.Abort(_('%s hook is invalid ("%s" not in ' |
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28 | 30 | 'a module)') % (hname, funcname)) |
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29 | 31 | modname = funcname[:d] |
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30 | 32 | oldpaths = sys.path |
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31 | 33 | if util.mainfrozen(): |
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32 | 34 | # binary installs require sys.path manipulation |
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33 | 35 | modpath, modfile = os.path.split(modname) |
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34 | 36 | if modpath and modfile: |
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35 | 37 | sys.path = sys.path[:] + [modpath] |
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36 | 38 | modname = modfile |
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37 | 39 | try: |
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38 | 40 | demandimport.disable() |
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39 | 41 | obj = __import__(modname) |
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40 | 42 | demandimport.enable() |
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41 | 43 | except ImportError: |
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42 | 44 | e1 = sys.exc_type, sys.exc_value, sys.exc_traceback |
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43 | 45 | try: |
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44 | 46 | # extensions are loaded with hgext_ prefix |
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45 | 47 | obj = __import__("hgext_%s" % modname) |
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46 | 48 | demandimport.enable() |
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47 | 49 | except ImportError: |
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48 | 50 | demandimport.enable() |
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49 | 51 | e2 = sys.exc_type, sys.exc_value, sys.exc_traceback |
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50 | 52 | if ui.tracebackflag: |
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51 | 53 | ui.warn(_('exception from first failed import attempt:\n')) |
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52 | 54 | ui.traceback(e1) |
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53 | 55 | if ui.tracebackflag: |
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54 | 56 | ui.warn(_('exception from second failed import attempt:\n')) |
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55 | 57 | ui.traceback(e2) |
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56 | 58 | raise util.Abort(_('%s hook is invalid ' |
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57 | 59 | '(import of "%s" failed)') % |
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58 | 60 | (hname, modname)) |
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59 | 61 | sys.path = oldpaths |
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60 | 62 | try: |
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61 | 63 | for p in funcname.split('.')[1:]: |
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62 | 64 | obj = getattr(obj, p) |
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63 | 65 | except AttributeError: |
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64 | 66 | raise util.Abort(_('%s hook is invalid ' |
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65 | 67 | '("%s" is not defined)') % |
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66 | 68 | (hname, funcname)) |
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67 | 69 | if not util.safehasattr(obj, '__call__'): |
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68 | 70 | raise util.Abort(_('%s hook is invalid ' |
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69 | 71 | '("%s" is not callable)') % |
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70 | 72 | (hname, funcname)) |
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71 | 73 | try: |
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72 | 74 | try: |
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73 | 75 | # redirect IO descriptors to the ui descriptors so hooks |
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74 | 76 | # that write directly to these don't mess up the command |
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75 | 77 | # protocol when running through the command server |
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76 | 78 | old = sys.stdout, sys.stderr, sys.stdin |
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77 | 79 | sys.stdout, sys.stderr, sys.stdin = ui.fout, ui.ferr, ui.fin |
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78 | 80 | |
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79 | 81 | r = obj(ui=ui, repo=repo, hooktype=name, **args) |
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80 | 82 | except KeyboardInterrupt: |
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81 | 83 | raise |
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82 | 84 | except Exception, exc: |
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83 | 85 | if isinstance(exc, util.Abort): |
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84 | 86 | ui.warn(_('error: %s hook failed: %s\n') % |
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85 | 87 | (hname, exc.args[0])) |
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86 | 88 | else: |
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87 | 89 | ui.warn(_('error: %s hook raised an exception: ' |
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88 | 90 | '%s\n') % (hname, exc)) |
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89 | 91 | if throw: |
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90 | 92 | raise |
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91 | 93 | ui.traceback() |
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92 | 94 | return True |
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93 | 95 | finally: |
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94 | 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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95 | 103 | if r: |
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96 | 104 | if throw: |
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97 | 105 | raise util.Abort(_('%s hook failed') % hname) |
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98 | 106 | ui.warn(_('warning: %s hook failed\n') % hname) |
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99 | 107 | return r |
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100 | 108 | |
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101 | 109 | def _exthook(ui, repo, name, cmd, args, throw): |
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102 | 110 | ui.note(_("running hook %s: %s\n") % (name, cmd)) |
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103 | 111 | |
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112 | starttime = time.time() | |
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104 | 113 | env = {} |
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105 | 114 | for k, v in args.iteritems(): |
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106 | 115 | if util.safehasattr(v, '__call__'): |
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107 | 116 | v = v() |
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108 | 117 | if isinstance(v, dict): |
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109 | 118 | # make the dictionary element order stable across Python |
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110 | 119 | # implementations |
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111 | 120 | v = ('{' + |
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112 | 121 | ', '.join('%r: %r' % i for i in sorted(v.iteritems())) + |
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113 | 122 | '}') |
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114 | 123 | env['HG_' + k.upper()] = v |
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115 | 124 | |
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116 | 125 | if repo: |
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117 | 126 | cwd = repo.root |
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118 | 127 | else: |
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119 | 128 | cwd = os.getcwd() |
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120 | 129 | if 'HG_URL' in env and env['HG_URL'].startswith('remote:http'): |
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121 | 130 | r = util.system(cmd, environ=env, cwd=cwd, out=ui) |
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122 | 131 | else: |
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123 | 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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124 | 137 | if r: |
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125 | 138 | desc, r = util.explainexit(r) |
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126 | 139 | if throw: |
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127 | 140 | raise util.Abort(_('%s hook %s') % (name, desc)) |
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128 | 141 | ui.warn(_('warning: %s hook %s\n') % (name, desc)) |
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129 | 142 | return r |
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130 | 143 | |
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131 | 144 | def _allhooks(ui): |
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132 | 145 | hooks = [] |
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133 | 146 | for name, cmd in ui.configitems('hooks'): |
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134 | 147 | if not name.startswith('priority'): |
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135 | 148 | priority = ui.configint('hooks', 'priority.%s' % name, 0) |
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136 | 149 | hooks.append((-priority, len(hooks), name, cmd)) |
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137 | 150 | return [(k, v) for p, o, k, v in sorted(hooks)] |
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138 | 151 | |
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139 | 152 | _redirect = False |
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140 | 153 | def redirect(state): |
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141 | 154 | global _redirect |
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142 | 155 | _redirect = state |
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143 | 156 | |
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144 | 157 | def hook(ui, repo, name, throw=False, **args): |
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145 | 158 | if not ui.callhooks: |
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146 | 159 | return False |
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147 | 160 | |
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148 | 161 | r = False |
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149 | 162 | oldstdout = -1 |
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150 | 163 | |
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151 | 164 | try: |
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152 | 165 | for hname, cmd in _allhooks(ui): |
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153 | 166 | if hname.split('.')[0] != name or not cmd: |
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154 | 167 | continue |
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155 | 168 | |
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156 | 169 | if oldstdout == -1 and _redirect: |
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157 | 170 | try: |
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158 | 171 | stdoutno = sys.__stdout__.fileno() |
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159 | 172 | stderrno = sys.__stderr__.fileno() |
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160 | 173 | # temporarily redirect stdout to stderr, if possible |
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161 | 174 | if stdoutno >= 0 and stderrno >= 0: |
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162 | 175 | sys.__stdout__.flush() |
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163 | 176 | oldstdout = os.dup(stdoutno) |
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164 | 177 | os.dup2(stderrno, stdoutno) |
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165 | 178 | except (OSError, AttributeError): |
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166 | 179 | # files seem to be bogus, give up on redirecting (WSGI, etc) |
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167 | 180 | pass |
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168 | 181 | |
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169 | 182 | if util.safehasattr(cmd, '__call__'): |
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170 | 183 | r = _pythonhook(ui, repo, name, hname, cmd, args, throw) or r |
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171 | 184 | elif cmd.startswith('python:'): |
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172 | 185 | if cmd.count(':') >= 2: |
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173 | 186 | path, cmd = cmd[7:].rsplit(':', 1) |
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174 | 187 | path = util.expandpath(path) |
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175 | 188 | if repo: |
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176 | 189 | path = os.path.join(repo.root, path) |
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177 | 190 | try: |
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178 | 191 | mod = extensions.loadpath(path, 'hghook.%s' % hname) |
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179 | 192 | except Exception: |
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180 | 193 | ui.write(_("loading %s hook failed:\n") % hname) |
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181 | 194 | raise |
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182 | 195 | hookfn = getattr(mod, cmd) |
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183 | 196 | else: |
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184 | 197 | hookfn = cmd[7:].strip() |
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185 | 198 | r = _pythonhook(ui, repo, name, hname, hookfn, args, throw) or r |
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186 | 199 | else: |
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187 | 200 | r = _exthook(ui, repo, hname, cmd, args, throw) or r |
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188 | 201 | finally: |
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189 | 202 | if _redirect and oldstdout >= 0: |
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190 | 203 | os.dup2(oldstdout, stdoutno) |
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191 | 204 | os.close(oldstdout) |
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192 | 205 | |
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193 | 206 | return r |
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