cdist/lib/cdist/context.py

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# -*- coding: utf-8 -*-
#
# 2010-2011 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 shutil
import sys
import tempfile
log = logging.getLogger(__name__)
import cdist.exec
class Context:
"""Storing context information"""
def __init__(self,
target_host,
initial_manifest=False,
base_path=False,
out_path=False,
remote_base_path=False,
debug=False):
self.target_host = target_host
# Base and Temp Base
if base_path:
self.base_path = base_path
else:
self.base_path = os.path.abspath(
os.path.join(os.path.dirname(__file__),
os.pardir,
os.pardir))
# Local input directories
self.cache_path = os.path.join(self.base_path, "cache", target_host)
self.conf_path = os.path.join(self.base_path, "conf")
self.global_explorer_path = os.path.join(self.conf_path, "explorer")
self.manifest_path = os.path.join(self.conf_path, "manifest")
self.type_base_path = os.path.join(self.conf_path, "type")
self.lib_path = os.path.join(self.base_path, "lib")
if initial_manifest:
self.initial_manifest = initial_manifest
else:
self.initial_manifest = os.path.join(self.manifest_path, "init")
# Local output directories
if out_path:
self.out_path = out_path
else:
self.out_path = os.path.join(tempfile.mkdtemp(), "out")
self.bin_path = os.path.join(self.out_path, "bin")
self.global_explorer_out_path = os.path.join(self.out_path, "explorer")
self.object_base_path = os.path.join(self.out_path, "object")
# Remote directories
if remote_base_path:
self.remote_base_path = remote_base_path
else:
self.remote_base_path = "/var/lib/cdist"
self.remote_conf_path = os.path.join(self.remote_base_path, "conf")
self.remote_object_path = os.path.join(self.remote_base_path, "object")
self.remote_type_path = os.path.join(self.remote_conf_path, "type")
self.remote_global_explorer_path = os.path.join(self.remote_conf_path, "explorer")
# Create directories
self.__init_out_paths()
self.__init_remote_paths()
def cleanup(self):
# Do not use in __del__:
# http://docs.python.org/reference/datamodel.html#customization
# "other globals referenced by the __del__() method may already have been deleted
# or in the process of being torn down (e.g. the import machinery shutting down)"
#
log.debug("Saving " + self.out_path + " to " + self.cache_path)
# Remove previous cache
if os.path.exists(self.cache_path):
shutil.rmtree(self.cache_path)
shutil.move(self.out_path, self.cache_path)
def __init_out_paths(self):
"""Initialise output directory structure"""
# Create base dir, if user supplied and not existing
if not os.path.isdir(self.base_path):
os.mkdir(self.base_path)
os.mkdir(self.out_path)
os.mkdir(self.global_explorer_out_path)
os.mkdir(self.bin_path)
def __init_remote_paths(self):
"""Initialise remote directory structure"""
self.remove_remote_path(self.remote_base_path)
self.remote_mkdir(self.remote_base_path)
self.remote_mkdir(self.remote_conf_path)
def remote_mkdir(self, directory):
"""Create directory on remote side"""
cdist.exec.run_or_fail(["mkdir", "-p", directory], remote_prefix=True)
def remove_remote_path(self, destination):
cdist.exec.run_or_fail(["rm", "-rf", destination], remote_prefix=True)
def transfer_path(self, source, destination):
"""Transfer directory and previously delete the remote destination"""
self.remove_remote_path(destination)
cdist.exec.run_or_fail(os.environ['__remote_copy'].split() +
["-r", source, self.target_host + ":" + destination])