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# Copyright (C) 2004, 2005 by Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# TODO: Perhaps rather than mapping options and arguments back and
# forth, we should just pass in the whole argv, and allow
# ExternalCommands to handle it differently to internal commands?
import os
import sys
from bzrlib.commands import Command
from bzrlib.osutils import pathjoin
class ExternalCommand(Command):
"""Class to wrap external commands."""
@classmethod
def find_command(cls, cmd):
import os.path
bzrpath = os.environ.get('BZRPATH', '')
for dir in bzrpath.split(os.pathsep):
## Empty directories are not real paths
if not dir:
continue
# This needs to be os.path.join() or windows cannot
# find the batch file that you are wanting to execute
path = os.path.join(dir, cmd)
if os.path.isfile(path):
return ExternalCommand(path)
return None
def __init__(self, path):
self.path = path
def name(self):
return os.path.basename(self.path)
def run(self, *args, **kwargs):
raise NotImplementedError('should not be called on %r' % self)
def run_argv(self, argv, alias_argv=None):
return os.spawnv(os.P_WAIT, self.path, [self.path] + argv)
def help(self):
m = 'external command from %s\n\n' % self.path
pipe = os.popen('%s --help' % self.path)
return m + pipe.read()
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