author | Martin von Zweigbergk <martinvonz@google.com> |
Thu, 31 Mar 2022 22:02:46 -0700 | |
changeset 49061 | 81d293eb5264 |
parent 48875 | 6000f5b25c9b |
child 51863 | f4733654f144 |
permissions | -rw-r--r-- |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
1 |
# Support code for event tracing in Mercurial. Lives in demandimport |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
2 |
# so it can also be used in demandimport. |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
3 |
# |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
4 |
# Copyright 2018 Google LLC. |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
5 |
# |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
6 |
# This software may be used and distributed according to the terms of the |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
7 |
# GNU General Public License version 2 or any later version. |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
8 |
|
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
9 |
import contextlib |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
10 |
import os |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
11 |
|
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
12 |
_pipe = None |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
13 |
_checked = False |
42709
978c9a0c5974
demandimport: explicitly declare `_session` at the module level
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
42477
diff
changeset
|
14 |
_session = 'none' |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
15 |
|
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
42709
diff
changeset
|
16 |
|
42476
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
17 |
def _isactive(): |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
18 |
global _pipe, _session, _checked |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
19 |
if _pipe is None: |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
20 |
if _checked: |
42476
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
21 |
return False |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
22 |
_checked = True |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
23 |
if 'HGCATAPULTSERVERPIPE' not in os.environ: |
42476
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
24 |
return False |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
25 |
_pipe = open(os.environ['HGCATAPULTSERVERPIPE'], 'w', 1) |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
26 |
_session = os.environ.get('HGCATAPULTSESSION', 'none') |
42476
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
27 |
return True |
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
28 |
|
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
42709
diff
changeset
|
29 |
|
42476
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
30 |
@contextlib.contextmanager |
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
31 |
def log(whencefmt, *whenceargs): |
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
32 |
if not _isactive(): |
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
33 |
yield |
d0b8a3cfd732
tracing: extract tracing-active logic to separate function
Augie Fackler <augie@google.com>
parents:
39397
diff
changeset
|
34 |
return |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
35 |
whence = whencefmt % whenceargs |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
36 |
try: |
39397
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
37 |
# Both writes to the pipe are wrapped in try/except to ignore |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
38 |
# errors, as we can see mysterious errors in here if the pager |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
39 |
# is active. Presumably other conditions could trigger |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
40 |
# problems too. |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
41 |
try: |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
42 |
_pipe.write('START %s %s\n' % (_session, whence)) |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
43 |
except IOError: |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
44 |
pass |
39254
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
45 |
yield |
284440041141
tracing: new module to make tracing events in hg easier
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
46 |
finally: |
39397
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
47 |
try: |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
48 |
_pipe.write('END %s %s\n' % (_session, whence)) |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
49 |
except IOError: |
452790284a15
tracing: ignore any IOErrors when writing to pipe
Augie Fackler <augie@google.com>
parents:
39254
diff
changeset
|
50 |
pass |
42477
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
51 |
|
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
42709
diff
changeset
|
52 |
|
42477
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
53 |
def counter(label, amount, *labelargs): |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
54 |
if not _isactive(): |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
55 |
return |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
56 |
l = label % labelargs |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
57 |
# See above in log() for why this is in a try/except. |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
58 |
try: |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
59 |
_pipe.write('COUNTER %s %d %s\n' % (_session, amount, l)) |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
60 |
except IOError: |
e658ac39fe41
tracing: add support for emitting counters
Augie Fackler <augie@google.com>
parents:
42476
diff
changeset
|
61 |
pass |