annotate mercurial/version.py @ 3420:52617d992eed

Report branch for hg log and friends
author Matt Mackall <mpm@selenic.com>
date Tue, 17 Oct 2006 18:30:18 -0500
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Vadim Gelfer <vadim.gelfer@gmail.com>
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1 # Copyright (C) 2005, 2006 by Intevation GmbH
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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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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
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16 import util
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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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29 def write_version(version):
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30 """Overwrite version file."""
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31 if version == get_version():
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32 return
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33 directory = os.path.dirname(__file__)
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34 for suffix in ['py', 'pyc', 'pyo']:
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35 try:
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36 os.unlink(os.path.join(directory, '__version__.%s' % suffix))
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37 except OSError:
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38 pass
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39 f = open(os.path.join(directory, '__version__.py'), 'w')
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40 f.write("# This file is auto-generated.\n")
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41 f.write("version = %r\n" % version)
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42 f.close()
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43
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44 def remember_version(version=None):
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45 """Store version information."""
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46 global remembered_version
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47 if not version and os.path.isdir(".hg"):
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48 f = os.popen("hg identify 2> %s" % util.nulldev) # use real hg installation
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49 ident = f.read()[:-1]
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50 if not f.close() and ident:
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51 ids = ident.split(' ', 1)
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52 version = ids.pop(0)
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53 if version[-1] == '+':
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54 version = version[:-1]
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55 modified = True
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56 else:
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57 modified = False
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58 if version.isalnum() and ids:
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59 for tag in ids[0].split('/'):
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60 # is a tag is suitable as a version number?
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61 if re.match(r'^(\d+\.)+[\w.-]+$', tag):
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62 version = tag
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63 break
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64 if modified:
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65 version += time.strftime('+%Y%m%d')
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66 if version:
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67 remembered_version = True
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68 write_version(version)
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70 def forget_version():
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71 """Remove version information."""
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72 if remembered_version:
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73 write_version(unknown_version)
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