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@@ -1,58 +1,59 b'' | |||||
1 | # Support code for event tracing in Mercurial. Lives in demandimport |
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1 | # Support code for event tracing in Mercurial. Lives in demandimport | |
2 | # so it can also be used in demandimport. |
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2 | # so it can also be used in demandimport. | |
3 | # |
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3 | # | |
4 | # Copyright 2018 Google LLC. |
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4 | # Copyright 2018 Google LLC. | |
5 | # |
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5 | # | |
6 | # This software may be used and distributed according to the terms of the |
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6 | # This software may be used and distributed according to the terms of the | |
7 | # GNU General Public License version 2 or any later version. |
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7 | # GNU General Public License version 2 or any later version. | |
8 | from __future__ import absolute_import |
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8 | from __future__ import absolute_import | |
9 |
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9 | |||
10 | import contextlib |
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10 | import contextlib | |
11 | import os |
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11 | import os | |
12 |
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12 | |||
13 | _pipe = None |
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13 | _pipe = None | |
14 | _checked = False |
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14 | _checked = False | |
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15 | _session = 'none' | |||
15 |
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16 | |||
16 | def _isactive(): |
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17 | def _isactive(): | |
17 | global _pipe, _session, _checked |
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18 | global _pipe, _session, _checked | |
18 | if _pipe is None: |
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19 | if _pipe is None: | |
19 | if _checked: |
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20 | if _checked: | |
20 | return False |
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21 | return False | |
21 | _checked = True |
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22 | _checked = True | |
22 | if 'HGCATAPULTSERVERPIPE' not in os.environ: |
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23 | if 'HGCATAPULTSERVERPIPE' not in os.environ: | |
23 | return False |
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24 | return False | |
24 | _pipe = open(os.environ['HGCATAPULTSERVERPIPE'], 'w', 1) |
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25 | _pipe = open(os.environ['HGCATAPULTSERVERPIPE'], 'w', 1) | |
25 | _session = os.environ.get('HGCATAPULTSESSION', 'none') |
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26 | _session = os.environ.get('HGCATAPULTSESSION', 'none') | |
26 | return True |
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27 | return True | |
27 |
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28 | |||
28 | @contextlib.contextmanager |
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29 | @contextlib.contextmanager | |
29 | def log(whencefmt, *whenceargs): |
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30 | def log(whencefmt, *whenceargs): | |
30 | if not _isactive(): |
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31 | if not _isactive(): | |
31 | yield |
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32 | yield | |
32 | return |
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33 | return | |
33 | whence = whencefmt % whenceargs |
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34 | whence = whencefmt % whenceargs | |
34 | try: |
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35 | try: | |
35 | # Both writes to the pipe are wrapped in try/except to ignore |
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36 | # Both writes to the pipe are wrapped in try/except to ignore | |
36 | # errors, as we can see mysterious errors in here if the pager |
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37 | # errors, as we can see mysterious errors in here if the pager | |
37 | # is active. Presumably other conditions could trigger |
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38 | # is active. Presumably other conditions could trigger | |
38 | # problems too. |
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39 | # problems too. | |
39 | try: |
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40 | try: | |
40 | _pipe.write('START %s %s\n' % (_session, whence)) |
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41 | _pipe.write('START %s %s\n' % (_session, whence)) | |
41 | except IOError: |
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42 | except IOError: | |
42 | pass |
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43 | pass | |
43 | yield |
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44 | yield | |
44 | finally: |
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45 | finally: | |
45 | try: |
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46 | try: | |
46 | _pipe.write('END %s %s\n' % (_session, whence)) |
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47 | _pipe.write('END %s %s\n' % (_session, whence)) | |
47 | except IOError: |
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48 | except IOError: | |
48 | pass |
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49 | pass | |
49 |
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50 | |||
50 | def counter(label, amount, *labelargs): |
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51 | def counter(label, amount, *labelargs): | |
51 | if not _isactive(): |
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52 | if not _isactive(): | |
52 | return |
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53 | return | |
53 | l = label % labelargs |
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54 | l = label % labelargs | |
54 | # See above in log() for why this is in a try/except. |
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55 | # See above in log() for why this is in a try/except. | |
55 | try: |
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56 | try: | |
56 | _pipe.write('COUNTER %s %d %s\n' % (_session, amount, l)) |
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57 | _pipe.write('COUNTER %s %d %s\n' % (_session, amount, l)) | |
57 | except IOError: |
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58 | except IOError: | |
58 | pass |
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59 | pass |
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