cdist/cdist/shell.py

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# -*- coding: utf-8 -*-
#
# 2013-2015 Nico Schottelius (nico-cdist at schottelius.org)
#
# This file is part of cdist.
#
# cdist 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 3 of the License, or
# (at your option) any later version.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
import logging
import os
import subprocess
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import tempfile
# initialise cdist
import cdist.exec.local
import cdist.config
log = logging.getLogger(__name__)
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class Shell(object):
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def __init__(self, shell=None):
self.shell = shell
self.target_host = (
"cdist-shell-no-target-host",
"cdist-shell-no-target-host",
"cdist-shell-no-target-host",
)
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host_dir_name = cdist.str_hash(self.target_host[0])
base_root_path = tempfile.mkdtemp()
host_base_path = os.path.join(base_root_path, host_dir_name)
self.local = cdist.exec.local.Local(
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target_host=self.target_host,
base_root_path=host_base_path,
host_dir_name=host_dir_name)
def _init_shell(self):
"""Select shell to execute, if not specified by user"""
if not self.shell:
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self.shell = os.environ.get('SHELL', "/bin/sh")
def _init_files_dirs(self):
self.local.create_files_dirs()
def _init_environment(self):
self.env = os.environ.copy()
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additional_env = {
'PATH': "%s:%s" % (self.local.bin_path, os.environ['PATH']),
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# for use in type emulator
'__cdist_type_base_path': self.local.type_path,
'__cdist_manifest': "cdist shell",
'__global': self.local.base_path,
'__target_host': self.target_host[0],
'__target_hostname': self.target_host[1],
'__target_fqdn': self.target_host[2],
'__manifest': self.local.manifest_path,
'__explorer': self.local.global_explorer_path,
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'__files': self.local.files_path,
}
self.env.update(additional_env)
def run(self):
self._init_shell()
self._init_files_dirs()
self._init_environment()
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log.trace("Starting shell...")
# save_output=False -> do not catch stdout and stderr
self.local.run([self.shell], self.env, save_output=False)
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log.trace("Finished shell.")
@classmethod
def commandline(cls, args):
shell = cls(args.shell)
shell.run()