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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 CommandFailedException
from cvs2svn_lib.abstract_rcs_revision_manager import AbstractRCSRevisionReader
class CVSRevisionReader(AbstractRCSRevisionReader):
"""A RevisionReader that reads the contents via CVS."""
# Different versions of CVS support different global options. Here
# are the global options that we try to use, in order of decreasing
# preference:
_possible_global_options = [
['-Q', '-R', '-f'],
['-Q', '-R'],
['-Q', '-f'],
['-Q'],
['-q', '-R', '-f'],
['-q', '-R'],
['-q', '-f'],
['-q'],
]
def __init__(self, cvs_executable, global_options=None):
"""Initialize a CVSRevisionReader.
CVS_EXECUTABLE is the CVS command (possibly including the full
path to the executable; otherwise it is sought in the $PATH).
GLOBAL_ARGUMENTS, if specified, should be a list of global options
that are passed to the CVS command before the subcommand. If
GLOBAL_ARGUMENTS is not specified, then each of the possibilities
listed in _possible_global_options is checked in order until one
is found that runs successfully and without any output to stderr."""
self.cvs_executable = cvs_executable
if global_options is None:
for global_options in self._possible_global_options:
try:
self._check_cvs_runs(global_options)
except CommandFailedException, e:
pass
else:
break
else:
raise FatalError(
'%s\n'
'Please check that cvs is installed and in your PATH.' % (e,)
)
else:
try:
self._check_cvs_runs(global_options)
except CommandFailedException, e:
raise FatalError(
'%s\n'
'Please check that cvs is installed and in your PATH and that\n'
'the global options that you specified (%r) are correct.'
% (e, global_options,)
)
# The global options were OK; use them for all CVS invocations.
self.global_options = global_options
def _check_cvs_runs(self, global_options):
"""Check that CVS can be started.
Try running 'cvs --version' with the current setting for
self.cvs_executable and the specified global_options. If not
successful, raise a CommandFailedException."""
check_command_runs(
[self.cvs_executable] + global_options + ['--version'],
self.cvs_executable,
)
def get_pipe_command(self, cvs_rev, k_option):
project = cvs_rev.cvs_file.project
return [
self.cvs_executable
] + self.global_options + [
'-d', ':local:' + project.cvs_repository_root,
'co',
'-r' + cvs_rev.rev,
'-p'
] + k_option + [
project.cvs_module + cvs_rev.cvs_path
]
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