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# (Be in -*- python -*- mode.)
#
# ====================================================================
# Copyright (c) 2000-2008 CollabNet. All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://subversion.tigris.org/license-1.html.
# If newer versions of this license are posted there, you may use a
# newer version instead, at your option.
#
# This software consists of voluntary contributions made by many
# individuals. For exact contribution history, see the revision
# history and logs, available at http://cvs2svn.tigris.org/.
# ====================================================================
"""Access the CVS repository via CVS's 'cvs' command."""
from cvs2svn_lib.common import FatalError
from cvs2svn_lib.process import check_command_runs
from cvs2svn_lib.process import PipeStream
from cvs2svn_lib.process import CommandFailedException
from cvs2svn_lib.revision_manager import RevisionReader
class CVSRevisionReader(RevisionReader):
"""A RevisionReader that reads the contents via CVS."""
# Different versions of CVS support different global arguments.
# Here are the global arguments that we try to use, in order of
# decreasing preference:
_possible_global_arguments = [
['-q', '-R', '-f'],
['-q', '-R'],
['-q', '-f'],
['-q'],
]
def __init__(self, cvs_executable):
self.cvs_executable = cvs_executable
for global_arguments in self._possible_global_arguments:
try:
self._check_cvs_runs(global_arguments)
except CommandFailedException, e:
pass
else:
# Those global arguments were OK; use them for all CVS invocations.
self.global_arguments = global_arguments
break
else:
raise FatalError(
'%s\n'
'Please check that cvs is installed and in your PATH.' % (e,)
)
def _check_cvs_runs(self, global_arguments):
"""Check that CVS can be started.
Try running 'cvs --version' with the current setting for
self.cvs_executable and the specified global_arguments. If not
successful, raise a CommandFailedException."""
check_command_runs(
[self.cvs_executable] + global_arguments + ['--version'],
self.cvs_executable,
)
def get_content_stream(self, cvs_rev, suppress_keyword_substitution=False):
project = cvs_rev.cvs_file.project
pipe_cmd = [
self.cvs_executable
] + self.global_arguments + [
'-d', project.cvs_repository_root,
'co',
'-r' + cvs_rev.rev,
'-p'
]
if suppress_keyword_substitution:
pipe_cmd.append('-kk')
pipe_cmd.append(project.cvs_module + cvs_rev.cvs_path)
return PipeStream(pipe_cmd)
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