Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/version.py @ 535:fba26990604a
Deal with failed clone/transaction interaction
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Deal with failed clone/transaction interaction
> What is happening is that something in the transaction machinery is
> causing the directory to be completely recreated.
The transaction gets rolled back by its destructor. This is critical
so it happens whenever an exception occurs that unwinds the stack.
Unfortunately, what's happening with clone is we're trying to delete
the directory during exception propagation. And a reference to the
transaction is held in the exception backtrace stack frames so it
still exists until the exception is completely resolved.
So there's no way to do the directory delete inside the exception
handling cleanly.
But we can handle it similarly to the transaction itself: use an
object with a destructor.
manifest hash: fc38550a20d64d08333f256bbedc312493c1390b
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author | mpm@selenic.com |
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date | Thu, 30 Jun 2005 10:07:50 -0800 |
parents | 50da4bb9cab6 |
children | 7eb694a1c1af |
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Support for 'hg --version'. setup.py stores version from hg repository.
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1 # Copyright (C) 2005 by Intevation GmbH |
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Support for 'hg --version'. setup.py stores version from hg repository.
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2 # Author(s): |
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3 # Thomas Arendsen Hein <thomas@intevation.de> |
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4 # |
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5 # This program is free software under the GNU GPL (>=v2) |
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6 # Read the file COPYING coming with the software for details. |
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7 |
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8 """ |
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9 Mercurial version |
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10 """ |
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11 |
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12 import os |
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13 import os.path |
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14 import re |
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15 import time |
461 | 16 import util |
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17 |
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18 unknown_version = 'unknown' |
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19 remembered_version = False |
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20 |
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21 def get_version(): |
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22 """Return version information if available.""" |
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23 try: |
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24 from mercurial.__version__ import version |
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25 except ImportError: |
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26 version = unknown_version |
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27 return version |
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28 |
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29 def write_version(version): |
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30 """Overwrite version file.""" |
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31 filename = os.path.join(os.path.dirname(__file__), '__version__.py') |
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32 f = open(filename, 'w') |
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33 f.write("# This file is auto-generated.\n") |
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34 f.write("version = %r\n" % version) |
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35 f.close() |
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36 |
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37 def remember_version(version=None): |
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38 """Store version information.""" |
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39 global remembered_version |
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40 if not version and os.path.isdir(".hg"): |
461 | 41 f = os.popen("hg identify 2> %s" % util.nulldev) # use real hg installation |
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42 ident = f.read()[:-1] |
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43 if not f.close() and ident: |
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44 ids = ident.split(' ', 1) |
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45 version = ids.pop(0) |
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46 if version[-1] == '+': |
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47 version = version[:-1] |
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48 modified = True |
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49 else: |
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50 modified = False |
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51 if version.isalnum() and ids: |
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52 for tag in ids[0].split('/'): |
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53 # is a tag is suitable as a version number? |
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54 if re.match(r'^(\d+\.)+[\w.-]+$', tag): |
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55 version = tag |
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56 break |
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57 if modified: |
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58 version += time.strftime('+%Y%m%d') |
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59 if version: |
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60 remembered_version = True |
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61 write_version(version) |
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62 |
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63 def forget_version(): |
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64 """Remove version information.""" |
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65 if remembered_version: |
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66 write_version(unknown_version) |
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67 |