275 lines
9.5 KiB
Python
275 lines
9.5 KiB
Python
# -*- coding: utf-8 -*-
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#
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# 2011 Steven Armstrong (steven-cdist at armstrong.cc)
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# 2011-2015 Nico Schottelius (nico-cdist at schottelius.org)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import io
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import os
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import sys
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import re
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import subprocess
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import shutil
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import logging
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import tempfile
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import cdist
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import cdist.message
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from cdist import core
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class Local(object):
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"""Execute commands locally.
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All interaction with the local side should be done through this class.
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Directly accessing the local side from python code is a bug.
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"""
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def __init__(self,
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target_host,
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exec_path=sys.argv[0],
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initial_manifest=None,
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base_path=None,
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add_conf_dirs=None):
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self.target_host = target_host
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# FIXME: stopped: create base that does not require moving later
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if base_path:
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self.base_path = base_path
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else:
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self.base_path = tempfile.mkdtemp()
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# FIXME: as well
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self._init_cache_dir(None)
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self.exec_path = exec_path
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self.custom_initial_manifest = initial_manifest
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self._add_conf_dirs = add_conf_dirs
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self._init_log()
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self._init_permissions()
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self._init_paths()
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self._init_object_marker()
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self._init_conf_dirs()
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@property
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def dist_conf_dir(self):
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return os.path.abspath(os.path.join(os.path.dirname(cdist.__file__), "conf"))
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@property
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def home_dir(self):
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if 'HOME' in os.environ:
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return os.path.join(os.environ['HOME'], ".cdist")
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else:
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return None
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def _init_log(self):
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self.log = logging.getLogger(self.target_host)
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def _init_permissions(self):
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# Setup file permissions using umask
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os.umask(0o077)
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def _init_paths(self):
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# Depending on out_path
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self.bin_path = os.path.join(self.base_path, "bin")
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self.conf_path = os.path.join(self.base_path, "conf")
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self.global_explorer_out_path = os.path.join(self.base_path, "explorer")
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self.object_path = os.path.join(self.base_path, "object")
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self.messages_path = os.path.join(self.base_path, "messages")
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# Depending on conf_path
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self.global_explorer_path = os.path.join(self.conf_path, "explorer")
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self.manifest_path = os.path.join(self.conf_path, "manifest")
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self.initial_manifest = (self.custom_initial_manifest or
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os.path.join(self.manifest_path, "init"))
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self.type_path = os.path.join(self.conf_path, "type")
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def _init_object_marker(self):
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self.object_marker_file = os.path.join(self.base_path, "object_marker")
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# Does not need to be secure - just randomly different from .cdist
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self.object_marker_name = tempfile.mktemp(prefix='.cdist-', dir='')
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def _init_conf_dirs(self):
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self.conf_dirs = []
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self.conf_dirs.append(self.dist_conf_dir)
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# Is the default place for user created explorer, type and manifest
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if self.home_dir:
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self.conf_dirs.append(self.home_dir)
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# Add directories defined in the CDIST_PATH environment variable
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if 'CDIST_PATH' in os.environ:
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cdist_path_dirs = re.split(r'(?<!\\):', os.environ['CDIST_PATH'])
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cdist_path_dirs.reverse()
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self.conf_dirs.extend(cdist_path_dirs)
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# Add command line supplied directories
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if self._add_conf_dirs:
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self.conf_dirs.extend(self._add_conf_dirs)
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def _init_directories(self):
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self.mkdir(self.conf_path)
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self.mkdir(self.global_explorer_out_path)
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self.mkdir(self.object_path)
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self.mkdir(self.bin_path)
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def create_files_dirs(self):
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self._init_directories()
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self._create_conf_path_and_link_conf_dirs()
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self._create_messages()
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self._link_types_for_emulator()
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self._setup_object_marker_file()
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def _setup_object_marker_file(self):
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with open(self.object_marker_file, 'w') as fd:
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fd.write("%s\n" % self.object_marker_name)
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self.log.debug("Object marker %s saved in %s" % (self.object_marker_name, self.object_marker_file))
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def _init_cache_dir(self, cache_dir):
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if cache_dir:
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self.cache_path = cache_dir
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else:
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if self.home_dir:
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self.cache_path = os.path.join(self.home_dir, "cache")
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else:
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raise cdist.Error("No homedir setup and no cache dir location given")
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def rmdir(self, path):
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"""Remove directory on the local side."""
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self.log.debug("Local rmdir: %s", path)
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shutil.rmtree(path)
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def mkdir(self, path):
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"""Create directory on the local side."""
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self.log.debug("Local mkdir: %s", path)
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os.makedirs(path, exist_ok=True)
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def run(self, command, env=None, return_output=False, message_prefix=None):
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"""Run the given command with the given environment.
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Return the output as a string.
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"""
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self.log.debug("Local run: %s", command)
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assert isinstance(command, (list, tuple)), "list or tuple argument expected, got: %s" % command
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if env is None:
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env = os.environ.copy()
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# Export __target_host for use in __remote_{copy,exec} scripts
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env['__target_host'] = self.target_host
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# Export for emulator
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env['__cdist_object_marker'] = self.object_marker_name
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if message_prefix:
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message = cdist.message.Message(message_prefix, self.messages_path)
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env.update(message.env)
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try:
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if return_output:
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return subprocess.check_output(command, env=env).decode()
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else:
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subprocess.check_call(command, env=env)
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except subprocess.CalledProcessError:
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raise cdist.Error("Command failed: " + " ".join(command))
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except OSError as error:
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raise cdist.Error(" ".join(command) + ": " + error.args[1])
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finally:
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if message_prefix:
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message.merge_messages()
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def run_script(self, script, env=None, return_output=False, message_prefix=None):
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"""Run the given script with the given environment.
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Return the output as a string.
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"""
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command = [ os.environ.get('CDIST_LOCAL_SHELL',"/bin/sh") , "-e"]
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command.append(script)
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return self.run(command=command, env=env, return_output=return_output, message_prefix=message_prefix)
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def save_cache(self):
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if os.path.isabs(self.target_host):
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hostdir = self.target_host[1:]
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else:
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hostdir = self.target_host
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destination = os.path.join(self.cache_path, hostdir)
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self.log.debug("Saving " + self.base_path + " to " + destination)
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try:
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if os.path.exists(destination):
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shutil.rmtree(destination)
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except PermissionError as e:
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raise cdist.Error("Cannot delete old cache %s: %s" % (destination, e))
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shutil.move(self.base_path, destination)
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def _create_messages(self):
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"""Create empty messages"""
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with open(self.messages_path, "w"):
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pass
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def _create_conf_path_and_link_conf_dirs(self):
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# Link destination directories
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for sub_dir in [ "explorer", "manifest", "type" ]:
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self.mkdir(os.path.join(self.conf_path, sub_dir))
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# Iterate over all directories and link the to the output dir
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for conf_dir in self.conf_dirs:
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self.log.debug("Checking conf_dir %s ..." % (conf_dir))
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for sub_dir in [ "explorer", "manifest", "type" ]:
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current_dir = os.path.join(conf_dir, sub_dir)
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# Allow conf dirs to contain only partial content
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if not os.path.exists(current_dir):
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continue
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for entry in os.listdir(current_dir):
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rel_entry_path = os.path.join(sub_dir, entry)
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src = os.path.abspath(os.path.join(conf_dir, sub_dir, entry))
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dst = os.path.join(self.conf_path, sub_dir, entry)
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# Already exists? remove and link
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if os.path.exists(dst):
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os.unlink(dst)
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self.log.debug("Linking %s to %s ..." % (src, dst))
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try:
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os.symlink(src, dst)
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except OSError as e:
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raise cdist.Error("Linking %s %s to %s failed: %s" % (sub_dir, src, dst, e.__str__()))
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def _link_types_for_emulator(self):
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"""Link emulator to types"""
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src = os.path.abspath(self.exec_path)
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for cdist_type in core.CdistType.list_types(self.type_path):
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dst = os.path.join(self.bin_path, cdist_type.name)
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self.log.debug("Linking emulator: %s to %s", src, dst)
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try:
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os.symlink(src, dst)
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except OSError as e:
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raise cdist.Error("Linking emulator from %s to %s failed: %s" % (src, dst, e.__str__()))
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