cvs2hg

   1 #!/usr/bin/env python
   2 # (Be in -*- python -*- mode.)
   3 #
   4 # ====================================================================
   5 # Copyright (c) 2000-2008 CollabNet.  All rights reserved.
   6 #
   7 # This software is licensed as described in the file COPYING, which
   8 # you should have received as part of this distribution.  The terms
   9 # are also available at http://subversion.tigris.org/license-1.html.
  10 # If newer versions of this license are posted there, you may use a
  11 # newer version instead, at your option.
  12 #
  13 # This software consists of voluntary contributions made by many
  14 # individuals.  For exact contribution history, see the revision
  15 # history and logs, available at http://cvs2svn.tigris.org/.
  16 # ====================================================================
  17
  18 import sys
  19
  20 # Make sure that a supported version of Python is being used.  Do this
  21 # as early as possible, using only code compatible with Python 1.5.2
  22 # and Python 3.x before the check.  Remember:
  23 #
  24 # Python 1.5.2 doesn't have sys.version_info or ''.join().
  25 # Python 3.0 doesn't have string.join().
  26 # There are plans to start deprecating the string formatting '%'
  27 # operator in Python 3.1 (but we use it here anyway).
  28
  29 version_error = """\
  30 ERROR: cvs2hg requires Python 2, version 2.4 or later; it does not
  31 work with Python 3.  You are currently using"""
  32
  33 version_advice = """\
  34 Please restart cvs2hg using a different version of the Python
  35 interpreter.  Visit http://www.python.org or consult your local system
  36 administrator if you need help.
  37
  38 HINT: If you already have a usable Python version installed, it might
  39 be possible to invoke cvs2hg with the correct Python interpreter by
  40 typing something like 'python2.5 """ + sys.argv[0] + """ [...]'.
  41 """
  42
  43 try:
  44   version = sys.version_info
  45 except AttributeError:
  46   # This is probably a pre-2.0 version of Python.
  47   sys.stderr.write(version_error + '\n')
  48   sys.stderr.write('-'*70 + '\n')
  49   sys.stderr.write(sys.version + '\n')
  50   sys.stderr.write('-'*70 + '\n')
  51   sys.stderr.write(version_advice)
  52   sys.exit(1)
  53
  54 if not ((2,4) <= version < (3,0)):
  55   sys.stderr.write(
  56       version_error + ' version %d.%d.%d.\n'
  57       % (version[0], version[1], version[2],)
  58       )
  59   sys.stderr.write(version_advice)
  60   sys.exit(1)
  61
  62 hg_required = "ERROR: cvs2hg requires Mercurial 1.1 or later.\n"
  63 hg_missing = "(No Mercurial API found.)\n"
  64 hg_version = "(Attempted to use the Mercurial %s API in\n%s.)\n"
  65
  66
  67 import os
  68 try:
  69   import mercurial
  70   from mercurial import context, __version__
  71   context.memctx                        # ensure Mercurial >= 1.1
  72   context.memfilectx
  73 except ImportError:
  74   sys.stderr.write(hg_required + hg_missing)
  75   sys.exit(1)
  76 except AttributeError:
  77   sys.stderr.write(hg_required +
  78                    hg_version
  79                    % (__version__.version,
  80                       os.path.dirname(mercurial.__file__)))
  81   sys.exit(1)
  82
  83 import os
  84
  85 from cvs2svn_lib.common import FatalException
  86 from cvs2svn_lib.main import hg_main
  87
  88
  89 try:
  90   hg_main(os.path.basename(sys.argv[0]), sys.argv[1:])
  91 except FatalException, e:
  92   sys.stderr.write(str(e) + '\n')
  93   sys.exit(1)
  94
  95