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1 | 1 | # blackbox.py - log repository events to a file for post-mortem debugging |
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2 | 2 | # |
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3 | 3 | # Copyright 2010 Nicolas Dumazet |
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4 | 4 | # Copyright 2013 Facebook, Inc. |
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5 | 5 | # |
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6 | 6 | # This software may be used and distributed according to the terms of the |
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7 | 7 | # GNU General Public License version 2 or any later version. |
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8 | 8 | |
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9 | 9 | """log repository events to a blackbox for debugging |
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10 | 10 | |
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11 | 11 | Logs event information to .hg/blackbox.log to help debug and diagnose problems. |
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12 | 12 | The events that get logged can be configured via the blackbox.track config key. |
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13 | 13 | |
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14 | 14 | Examples:: |
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15 | 15 | |
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16 | 16 | [blackbox] |
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17 | 17 | track = * |
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18 | 18 | # dirty is *EXPENSIVE* (slow); |
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19 | 19 | # each log entry indicates `+` if the repository is dirty, like :hg:`id`. |
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20 | 20 | dirty = True |
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21 | 21 | # record the source of log messages |
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22 | 22 | logsource = True |
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23 | 23 | |
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24 | 24 | [blackbox] |
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25 | 25 | track = command, commandfinish, commandexception, exthook, pythonhook |
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26 | 26 | |
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27 | 27 | [blackbox] |
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28 | 28 | track = incoming |
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29 | 29 | |
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30 | 30 | [blackbox] |
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31 | 31 | # limit the size of a log file |
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32 | 32 | maxsize = 1.5 MB |
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33 | 33 | # rotate up to N log files when the current one gets too big |
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34 | 34 | maxfiles = 3 |
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35 | 35 | |
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36 | 36 | [blackbox] |
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37 | 37 | # Include nanoseconds in log entries with %f (see Python function |
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38 | 38 | # datetime.datetime.strftime) |
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39 | 39 | date-format = '%Y-%m-%d @ %H:%M:%S.%f' |
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40 | 40 | |
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41 | 41 | """ |
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42 | 42 | |
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43 | 43 | from __future__ import absolute_import |
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44 | 44 | |
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45 | 45 | import errno |
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46 | 46 | import re |
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47 | 47 | |
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48 | 48 | from mercurial.i18n import _ |
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49 | 49 | from mercurial.node import hex |
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50 | 50 | |
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51 | 51 | from mercurial import ( |
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52 | 52 | encoding, |
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53 | 53 | pycompat, |
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54 | 54 | registrar, |
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55 | 55 | ) |
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56 | 56 | from mercurial.utils import ( |
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57 | 57 | dateutil, |
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58 | 58 | procutil, |
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59 | 59 | ) |
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60 | 60 | |
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61 | 61 | # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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62 | 62 | # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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63 | 63 | # be specifying the version(s) of Mercurial they are tested with, or |
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64 | 64 | # leave the attribute unspecified. |
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65 | 65 | testedwith = 'ships-with-hg-core' |
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66 | 66 | |
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67 | 67 | cmdtable = {} |
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68 | 68 | command = registrar.command(cmdtable) |
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69 | 69 | |
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70 | 70 | configtable = {} |
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71 | 71 | configitem = registrar.configitem(configtable) |
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72 | 72 | |
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73 | 73 | configitem('blackbox', 'dirty', |
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74 | 74 | default=False, |
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75 | 75 | ) |
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76 | 76 | configitem('blackbox', 'maxsize', |
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77 | 77 | default='1 MB', |
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78 | 78 | ) |
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79 | 79 | configitem('blackbox', 'logsource', |
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80 | 80 | default=False, |
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81 | 81 | ) |
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82 | 82 | configitem('blackbox', 'maxfiles', |
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83 | 83 | default=7, |
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84 | 84 | ) |
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85 | 85 | configitem('blackbox', 'track', |
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86 | 86 | default=lambda: ['*'], |
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87 | 87 | ) |
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88 | 88 | configitem('blackbox', 'date-format', |
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89 | 89 | default='%Y/%m/%d %H:%M:%S', |
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90 | 90 | ) |
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91 | 91 | |
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92 | _lastlogger = None | |
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93 | ||
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94 | 92 | def _openlogfile(ui, vfs): |
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95 | 93 | def rotate(oldpath, newpath): |
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96 | 94 | try: |
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97 | 95 | vfs.unlink(newpath) |
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98 | 96 | except OSError as err: |
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99 | 97 | if err.errno != errno.ENOENT: |
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100 | 98 | ui.debug("warning: cannot remove '%s': %s\n" % |
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101 | 99 | (newpath, err.strerror)) |
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102 | 100 | try: |
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103 | 101 | if newpath: |
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104 | 102 | vfs.rename(oldpath, newpath) |
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105 | 103 | except OSError as err: |
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106 | 104 | if err.errno != errno.ENOENT: |
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107 | 105 | ui.debug("warning: cannot rename '%s' to '%s': %s\n" % |
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108 | 106 | (newpath, oldpath, err.strerror)) |
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109 | 107 | |
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110 | 108 | maxsize = ui.configbytes('blackbox', 'maxsize') |
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111 | 109 | name = 'blackbox.log' |
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112 | 110 | if maxsize > 0: |
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113 | 111 | try: |
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114 | 112 | st = vfs.stat(name) |
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115 | 113 | except OSError: |
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116 | 114 | pass |
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117 | 115 | else: |
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118 | 116 | if st.st_size >= maxsize: |
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119 | 117 | path = vfs.join(name) |
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120 | 118 | maxfiles = ui.configint('blackbox', 'maxfiles') |
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121 | 119 | for i in pycompat.xrange(maxfiles - 1, 1, -1): |
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122 | 120 | rotate(oldpath='%s.%d' % (path, i - 1), |
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123 | 121 | newpath='%s.%d' % (path, i)) |
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124 | 122 | rotate(oldpath=path, |
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125 | 123 | newpath=maxfiles > 0 and path + '.1') |
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126 | 124 | return vfs(name, 'a') |
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127 | 125 | |
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126 | class proxylogger(object): | |
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127 | """Forward log events to another logger to be set later""" | |
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128 | ||
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129 | def __init__(self): | |
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130 | self.logger = None | |
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131 | ||
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132 | def tracked(self, event): | |
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133 | return self.logger is not None and self.logger.tracked(event) | |
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134 | ||
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135 | def log(self, ui, event, msg, opts): | |
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136 | assert self.logger is not None | |
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137 | self.logger.log(ui, event, msg, opts) | |
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138 | ||
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139 | _lastlogger = proxylogger() | |
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140 | ||
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128 | 141 | class blackboxlogger(object): |
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129 | 142 | def __init__(self, ui): |
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130 | 143 | self._repo = None |
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131 | 144 | self._trackedevents = set(ui.configlist('blackbox', 'track')) |
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132 | 145 | |
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133 | 146 | @property |
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134 | 147 | def _bbvfs(self): |
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135 | 148 | vfs = None |
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136 | 149 | if self._repo: |
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137 | 150 | vfs = self._repo.vfs |
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138 | 151 | if not vfs.isdir('.'): |
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139 | 152 | vfs = None |
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140 | 153 | return vfs |
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141 | 154 | |
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142 | 155 | def tracked(self, event): |
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143 | 156 | return b'*' in self._trackedevents or event in self._trackedevents |
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144 | 157 | |
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145 | 158 | def log(self, ui, event, msg, opts): |
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146 | global _lastlogger | |
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147 | 159 | if self._bbvfs: |
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148 | _lastlogger = self | |
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149 | elif _lastlogger and _lastlogger._bbvfs: | |
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150 | # certain logger instances exist outside the context of | |
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151 | # a repo, so just default to the last blackbox logger that | |
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152 | # was seen. | |
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153 | pass | |
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160 | _lastlogger.logger = self | |
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154 | 161 | else: |
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155 | 162 | return |
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156 | _lastlogger._log(ui, event, msg, opts) | |
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157 | 163 | |
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158 | def _log(self, ui, event, msg, opts): | |
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159 | 164 | default = ui.configdate('devel', 'default-date') |
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160 | 165 | date = dateutil.datestr(default, ui.config('blackbox', 'date-format')) |
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161 | 166 | user = procutil.getuser() |
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162 | 167 | pid = '%d' % procutil.getpid() |
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163 | 168 | rev = '(unknown)' |
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164 | 169 | changed = '' |
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165 | 170 | ctx = self._repo[None] |
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166 | 171 | parents = ctx.parents() |
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167 | 172 | rev = ('+'.join([hex(p.node()) for p in parents])) |
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168 | 173 | if (ui.configbool('blackbox', 'dirty') and |
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169 | 174 | ctx.dirty(missing=True, merge=False, branch=False)): |
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170 | 175 | changed = '+' |
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171 | 176 | if ui.configbool('blackbox', 'logsource'): |
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172 | 177 | src = ' [%s]' % event |
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173 | 178 | else: |
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174 | 179 | src = '' |
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175 | 180 | try: |
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176 | 181 | fmt = '%s %s @%s%s (%s)%s> %s' |
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177 | 182 | args = (date, user, rev, changed, pid, src, msg) |
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178 | 183 | with _openlogfile(ui, self._bbvfs) as fp: |
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179 | 184 | fp.write(fmt % args) |
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180 | 185 | except (IOError, OSError) as err: |
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181 | 186 | # deactivate this to avoid failed logging again |
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182 | 187 | self._repo = None |
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183 | 188 | ui.debug('warning: cannot write to blackbox.log: %s\n' % |
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184 | 189 | encoding.strtolocal(err.strerror)) |
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185 | 190 | |
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186 | 191 | def setrepo(self, repo): |
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187 | 192 | self._repo = repo |
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188 | 193 | |
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189 | 194 | def uipopulate(ui): |
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190 |
ui.setlogger(b'blackbox', |
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195 | ui.setlogger(b'blackbox', _lastlogger) | |
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191 | 196 | |
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192 | 197 | def reposetup(ui, repo): |
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193 | 198 | # During 'hg pull' a httppeer repo is created to represent the remote repo. |
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194 | 199 | # It doesn't have a .hg directory to put a blackbox in, so we don't do |
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195 | 200 | # the blackbox setup for it. |
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196 | 201 | if not repo.local(): |
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197 | 202 | return |
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198 | 203 | |
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199 | 204 | # Since blackbox.log is stored in the repo directory, the logger should be |
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200 | 205 | # instantiated per repository. |
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201 | 206 | logger = blackboxlogger(ui) |
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202 | 207 | ui.setlogger(b'blackbox', logger) |
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203 | if logger: | |
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204 | 208 |
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205 | 209 | |
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206 | 210 |
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207 |
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208 | global _lastlogger | |
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209 |
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210 | _lastlogger = logger | |
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211 | # fallback place to log | |
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212 | if _lastlogger.logger is None: | |
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213 | _lastlogger.logger = logger | |
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211 | 214 | |
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212 | 215 | repo._wlockfreeprefix.add('blackbox.log') |
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213 | 216 | |
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214 | 217 | @command('blackbox', |
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215 | 218 | [('l', 'limit', 10, _('the number of events to show')), |
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216 | 219 | ], |
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217 | 220 | _('hg blackbox [OPTION]...'), |
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218 | 221 | helpcategory=command.CATEGORY_MAINTENANCE, |
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219 | 222 | helpbasic=True) |
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220 | 223 | def blackbox(ui, repo, *revs, **opts): |
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221 | 224 | '''view the recent repository events |
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222 | 225 | ''' |
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223 | 226 | |
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224 | 227 | if not repo.vfs.exists('blackbox.log'): |
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225 | 228 | return |
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226 | 229 | |
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227 | 230 | limit = opts.get(r'limit') |
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228 | 231 | fp = repo.vfs('blackbox.log', 'r') |
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229 | 232 | lines = fp.read().split('\n') |
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230 | 233 | |
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231 | 234 | count = 0 |
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232 | 235 | output = [] |
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233 | 236 | for line in reversed(lines): |
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234 | 237 | if count >= limit: |
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235 | 238 | break |
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236 | 239 | |
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237 | 240 | # count the commands by matching lines like: 2013/01/23 19:13:36 root> |
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238 | 241 | if re.match('^\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2} .*> .*', line): |
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239 | 242 | count += 1 |
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240 | 243 | output.append(line) |
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241 | 244 | |
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242 | 245 | ui.status('\n'.join(reversed(output))) |
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