cvs2svn_lib/rcs_revision_manager.py

   1 # (Be in -*- python -*- mode.)
   2 #
   3 # ====================================================================
   4 # Copyright (c) 2000-2008 CollabNet.  All rights reserved.
   5 #
   6 # This software is licensed as described in the file COPYING, which
   7 # you should have received as part of this distribution.  The terms
   8 # are also available at http://subversion.tigris.org/license-1.html.
   9 # If newer versions of this license are posted there, you may use a
  10 # newer version instead, at your option.
  11 #
  12 # This software consists of voluntary contributions made by many
  13 # individuals.  For exact contribution history, see the revision
  14 # history and logs, available at http://cvs2svn.tigris.org/.
  15 # ====================================================================
  16
  17 """Access the CVS repository via RCS's 'co' command."""
  18
  19
  20 from cvs2svn_lib.common import FatalError
  21 from cvs2svn_lib.process import check_command_runs
  22 from cvs2svn_lib.process import get_command_output
  23 from cvs2svn_lib.process import CommandFailedException
  24 from cvs2svn_lib.context import Ctx
  25 from cvs2svn_lib.revision_manager import RevisionReader
  26 from cvs2svn_lib.apple_single_filter import get_maybe_apple_single
  27
  28
  29 class RCSRevisionReader(RevisionReader):
  30   """A RevisionReader that reads the contents via RCS."""
  31
  32   def __init__(self, co_executable):
  33     self.co_executable = co_executable
  34     try:
  35       check_command_runs([self.co_executable, '-V'], self.co_executable)
  36     except CommandFailedException, e:
  37       raise FatalError('%s\n'
  38                        'Please check that co is installed and in your PATH\n'
  39                        '(it is a part of the RCS software).' % (e,))
  40
  41   def get_content(self, cvs_rev):
  42     pipe_cmd = [
  43         self.co_executable,
  44         '-q',
  45         '-x,v',
  46         '-p%s' % (cvs_rev.rev,)
  47         ]
  48     if cvs_rev.get_property('_keyword_handling') == 'collapsed':
  49       pipe_cmd.append('-kk')
  50     pipe_cmd.append(cvs_rev.cvs_file.filename)
  51     data = get_command_output(pipe_cmd)
  52
  53     if Ctx().decode_apple_single:
  54       # Insert a filter to decode any files that are in AppleSingle
  55       # format:
  56       data = get_maybe_apple_single(data)
  57
  58     return data
  59
  60