Mercurial > hg
annotate mercurial/scmwindows.py @ 23201:7e97bf6ee2d6
changelog: rework the delayupdate mechanism
The current way we use the 'delayupdate' mechanism is wrong. We call
'delayupdate' right after the transaction retrieval, then we call 'finalize'
right before calling 'tr.close()'. The 'finalize' call will -always- result in a
flush to disk, making the data available to all readers. But the 'tr.close()' may
be a no-op if the transaction is nested. This would result in data:
1) exposed to reader too early,
2) rolled back by other part of the transaction after such exposure
So we need to end up in a situation where we call 'finalize' a single time when
the transaction actually closes. For this purpose we need to be able to call
'delayupdate' and '_writepending' multiple times and 'finalize' once. This was
not possible with the previous state of the code.
This changeset refactors the code to makes this possible. We buffer data in memory
as much as possible and fall-back to writing to a ".a" file after the first call
to '_writepending'.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Sat, 18 Oct 2014 01:12:18 -0700 |
parents | 23c995ed466b |
children | adae8928fe09 |
rev | line source |
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18690
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scmutil: split platform-specific bits into their own modules
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1 import os |
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2 import osutil |
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scmutil: fix NameError on windows
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3 import util |
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4 import _winreg |
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5 |
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6 def systemrcpath(): |
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7 '''return default os-specific hgrc search path''' |
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8 rcpath = [] |
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9 filename = util.executablepath() |
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10 # Use mercurial.ini found in directory with hg.exe |
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11 progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini') |
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12 if os.path.isfile(progrc): |
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13 rcpath.append(progrc) |
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14 return rcpath |
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15 # Use hgrc.d found in directory with hg.exe |
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16 progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d') |
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17 if os.path.isdir(progrcd): |
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18 for f, kind in osutil.listdir(progrcd): |
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19 if f.endswith('.rc'): |
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20 rcpath.append(os.path.join(progrcd, f)) |
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21 return rcpath |
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22 # else look for a system rcpath in the registry |
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23 value = util.lookupreg('SOFTWARE\\Mercurial', None, |
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24 _winreg.HKEY_LOCAL_MACHINE) |
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25 if not isinstance(value, str) or not value: |
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26 return rcpath |
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27 value = util.localpath(value) |
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28 for p in value.split(os.pathsep): |
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29 if p.lower().endswith('mercurial.ini'): |
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30 rcpath.append(p) |
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31 elif os.path.isdir(p): |
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32 for f, kind in osutil.listdir(p): |
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33 if f.endswith('.rc'): |
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34 rcpath.append(os.path.join(p, f)) |
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35 return rcpath |
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36 |
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37 def userrcpath(): |
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38 '''return os-specific hgrc search path to the user dir''' |
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39 home = os.path.expanduser('~') |
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40 path = [os.path.join(home, 'mercurial.ini'), |
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41 os.path.join(home, '.hgrc')] |
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42 userprofile = os.environ.get('USERPROFILE') |
22583
23c995ed466b
config: don't read the same config file twice
Mads Kiilerich <madski@unity3d.com>
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43 if userprofile and userprofile != home: |
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44 path.append(os.path.join(userprofile, 'mercurial.ini')) |
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45 path.append(os.path.join(userprofile, '.hgrc')) |
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46 return path |