Mercurial > hg-stable
annotate hgext/logtoprocess.py @ 51079:5b5cb6b833b0
debug-delta-chain: actually skip unrequested computation
Doing quick test on mozilla-unified show we can run up to 2× faster by skipping
some of these computation.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Tue, 19 Sep 2023 02:20:49 +0200 |
parents | 642e31cb55f0 |
children | f4733654f144 |
rev | line source |
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1 # logtoprocess.py - send ui.log() data to a subprocess |
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2 # |
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3 # Copyright 2016 Facebook, Inc. |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 """send ui.log() data to a subprocess (EXPERIMENTAL) |
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8 |
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9 This extension lets you specify a shell command per ui.log() event, |
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10 sending all remaining arguments to as environment variables to that command. |
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11 |
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12 Positional arguments construct a log message, which is passed in the `MSG1` |
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13 environment variables. Each keyword argument is set as a `OPT_UPPERCASE_KEY` |
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14 variable (so the key is uppercased, and prefixed with `OPT_`). The original |
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15 event name is passed in the `EVENT` environment variable, and the process ID |
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16 of mercurial is given in `HGPID`. |
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17 |
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18 So given a call `ui.log('foo', 'bar %s\n', 'baz', spam='eggs'), a script |
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19 configured for the `foo` event can expect an environment with `MSG1=bar baz`, |
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20 and `OPT_SPAM=eggs`. |
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21 |
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22 Scripts are configured in the `[logtoprocess]` section, each key an event name. |
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23 For example:: |
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24 |
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25 [logtoprocess] |
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26 commandexception = echo "$MSG1" > /var/log/mercurial_exceptions.log |
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27 |
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28 would log the warning message and traceback of any failed command dispatch. |
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29 |
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30 Scripts are run asynchronously as detached daemon processes; mercurial will |
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31 not ensure that they exit cleanly. |
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32 |
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33 """ |
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34 |
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35 |
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36 import os |
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37 |
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38 from mercurial.utils import procutil |
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39 |
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40 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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41 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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42 # be specifying the version(s) of Mercurial they are tested with, or |
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43 # leave the attribute unspecified. |
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44 testedwith = b'ships-with-hg-core' |
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45 |
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46 |
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47 class processlogger: |
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48 """Map log events to external commands |
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49 |
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50 Arguments are passed on as environment variables. |
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51 """ |
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52 |
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53 def __init__(self, ui): |
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54 self._scripts = dict(ui.configitems(b'logtoprocess')) |
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55 |
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56 def tracked(self, event): |
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57 return bool(self._scripts.get(event)) |
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58 |
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59 def log(self, ui, event, msg, opts): |
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60 script = self._scripts[event] |
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61 maxmsg = 100000 |
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62 if len(msg) > maxmsg: |
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63 # Each env var has a 128KiB limit on linux. msg can be long, in |
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64 # particular for command event, where it's the full command line. |
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65 # Prefer truncating the message than raising "Argument list too |
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66 # long" error. |
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67 msg = msg[:maxmsg] + b' (truncated)' |
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68 env = { |
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69 b'EVENT': event, |
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70 b'HGPID': os.getpid(), |
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71 b'MSG1': msg, |
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72 } |
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73 # keyword arguments get prefixed with OPT_ and uppercased |
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74 env.update( |
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75 (b'OPT_%s' % key.upper(), value) for key, value in opts.items() |
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76 ) |
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77 fullenv = procutil.shellenviron(env) |
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78 procutil.runbgcommand(script, fullenv, shell=True) |
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79 |
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80 |
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81 def uipopulate(ui): |
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82 ui.setlogger(b'logtoprocess', processlogger(ui)) |