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.common import canonicalize_eol
  22 from cvs2svn_lib.process import check_command_runs
  23 from cvs2svn_lib.process import get_command_output
  24 from cvs2svn_lib.process import CommandFailedException
  25 from cvs2svn_lib.context import Ctx
  26 from cvs2svn_lib.revision_manager import RevisionReader
  27 from cvs2svn_lib.abstract_rcs_revision_manager import AbstractRCSRevisionReader
  28 from cvs2svn_lib.apple_single_filter import get_maybe_apple_single
  29
  30
  31 class RCSRevisionReader(AbstractRCSRevisionReader):
  32   """A RevisionReader that reads the contents via RCS."""
  33
  34   def __init__(self, co_executable):
  35     self.co_executable = co_executable
  36     try:
  37       check_command_runs([self.co_executable, '-V'], self.co_executable)
  38     except CommandFailedException, e:
  39       raise FatalError('%s\n'
  40                        'Please check that co is installed and in your PATH\n'
  41                        '(it is a part of the RCS software).' % (e,))
  42
  43   def get_content(self, cvs_rev):
  44     pipe_cmd = [
  45         self.co_executable,
  46         '-q',
  47         '-x,v',
  48         '-p%s' % (cvs_rev.rev,)
  49         ] + self.select_k_option(cvs_rev) + [
  50         cvs_rev.cvs_file.rcs_path
  51         ]
  52     data = get_command_output(pipe_cmd)
  53
  54     if Ctx().decode_apple_single:
  55       # Insert a filter to decode any files that are in AppleSingle
  56       # format:
  57       data = get_maybe_apple_single(data)
  58
  59     eol_fix = cvs_rev.get_property('_eol_fix')
  60     if eol_fix:
  61       data = canonicalize_eol(data, eol_fix)
  62
  63     return data
  64
  65