author | David Soria Parra <davidsp@fb.com> |
Tue, 14 Oct 2014 20:35:17 -0700 | |
changeset 22977 | 29ae3b190ec5 |
parent 19230 | 6d6f148cada9 |
child 23877 | 7cc77030c557 |
permissions | -rw-r--r-- |
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# blackbox.py - log repository events to a file for post-mortem debugging |
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# |
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# Copyright 2010 Nicolas Dumazet |
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# Copyright 2013 Facebook, Inc. |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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"""log repository events to a blackbox for debugging |
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Logs event information to .hg/blackbox.log to help debug and diagnose problems. |
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The events that get logged can be configured via the blackbox.track config key. |
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Examples:: |
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[blackbox] |
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track = * |
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[blackbox] |
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track = command, commandfinish, commandexception, exthook, pythonhook |
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[blackbox] |
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track = incoming |
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[blackbox] |
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# limit the size of a log file |
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maxsize = 1.5 MB |
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# rotate up to N log files when the current one gets too big |
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maxfiles = 3 |
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""" |
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from mercurial import util, cmdutil |
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from mercurial.i18n import _ |
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import errno, os, re |
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cmdtable = {} |
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command = cmdutil.command(cmdtable) |
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testedwith = 'internal' |
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lastblackbox = None |
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def wrapui(ui): |
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class blackboxui(ui.__class__): |
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@util.propertycache |
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def track(self): |
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return self.configlist('blackbox', 'track', ['*']) |
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def _openlogfile(self): |
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def rotate(oldpath, newpath): |
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try: |
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os.unlink(newpath) |
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except OSError, err: |
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if err.errno != errno.ENOENT: |
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self.debug("warning: cannot remove '%s': %s\n" % |
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(newpath, err.strerror)) |
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try: |
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if newpath: |
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os.rename(oldpath, newpath) |
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except OSError, err: |
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if err.errno != errno.ENOENT: |
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self.debug("warning: cannot rename '%s' to '%s': %s\n" % |
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(newpath, oldpath, err.strerror)) |
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fp = self._bbopener('blackbox.log', 'a') |
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maxsize = self.configbytes('blackbox', 'maxsize', 1048576) |
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if maxsize > 0: |
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st = os.fstat(fp.fileno()) |
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if st.st_size >= maxsize: |
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path = fp.name |
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fp.close() |
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maxfiles = self.configint('blackbox', 'maxfiles', 7) |
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for i in xrange(maxfiles - 1, 1, -1): |
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rotate(oldpath='%s.%d' % (path, i - 1), |
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newpath='%s.%d' % (path, i)) |
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rotate(oldpath=path, |
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newpath=maxfiles > 0 and path + '.1') |
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fp = self._bbopener('blackbox.log', 'a') |
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return fp |
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def log(self, event, *msg, **opts): |
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global lastblackbox |
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super(blackboxui, self).log(event, *msg, **opts) |
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if not '*' in self.track and not event in self.track: |
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return |
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if util.safehasattr(self, '_blackbox'): |
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blackbox = self._blackbox |
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elif util.safehasattr(self, '_bbopener'): |
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try: |
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self._blackbox = self._openlogfile() |
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except (IOError, OSError), err: |
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self.debug('warning: cannot write to blackbox.log: %s\n' % |
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err.strerror) |
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del self._bbopener |
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self._blackbox = None |
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blackbox = self._blackbox |
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else: |
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# certain ui instances exist outside the context of |
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# a repo, so just default to the last blackbox that |
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# was seen. |
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blackbox = lastblackbox |
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if blackbox: |
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date = util.datestr(None, '%Y/%m/%d %H:%M:%S') |
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user = util.getuser() |
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formattedmsg = msg[0] % msg[1:] |
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try: |
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blackbox.write('%s %s> %s' % (date, user, formattedmsg)) |
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except IOError, err: |
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self.debug('warning: cannot write to blackbox.log: %s\n' % |
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err.strerror) |
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lastblackbox = blackbox |
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def setrepo(self, repo): |
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self._bbopener = repo.opener |
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ui.__class__ = blackboxui |
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def uisetup(ui): |
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wrapui(ui) |
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def reposetup(ui, repo): |
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# During 'hg pull' a httppeer repo is created to represent the remote repo. |
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# It doesn't have a .hg directory to put a blackbox in, so we don't do |
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# the blackbox setup for it. |
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if not repo.local(): |
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127 |
return |
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128 |
|
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if util.safehasattr(ui, 'setrepo'): |
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130 |
ui.setrepo(repo) |
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131 |
|
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132 |
@command('^blackbox', |
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133 |
[('l', 'limit', 10, _('the number of events to show')), |
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134 |
], |
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_('hg blackbox [OPTION]...')) |
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136 |
def blackbox(ui, repo, *revs, **opts): |
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137 |
'''view the recent repository events |
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''' |
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139 |
|
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if not os.path.exists(repo.join('blackbox.log')): |
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141 |
return |
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142 |
|
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143 |
limit = opts.get('limit') |
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blackbox = repo.opener('blackbox.log', 'r') |
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lines = blackbox.read().split('\n') |
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146 |
|
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147 |
count = 0 |
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148 |
output = [] |
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149 |
for line in reversed(lines): |
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150 |
if count >= limit: |
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151 |
break |
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152 |
|
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# count the commands by matching lines like: 2013/01/23 19:13:36 root> |
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if re.match('^\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2} .*> .*', line): |
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155 |
count += 1 |
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156 |
output.append(line) |
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157 |
|
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158 |
ui.status('\n'.join(reversed(output))) |