cdist/lib/cdist/exec/local.py

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# -*- coding: utf-8 -*-
#
# 2011 Steven Armstrong (steven-cdist at armstrong.cc)
# 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/>.
#
#
# FIXME: common base class with Remote?
import io
import os
import sys
import subprocess
import shutil
import logging
import cdist
from cdist import core
class LocalScriptError(cdist.Error):
def __init__(self, script, command, script_content):
self.script = script
self.command = command
self.script_content = script_content
def __str__(self):
return "Local script execution failed: %s %s" % (self.script, self.command)
class Local(object):
"""Execute commands locally.
All interaction with the local side should be done through this class.
Directly accessing the local side from python code is a bug.
"""
def __init__(self, target_host, local_base_path, out_path):
self.target_host = target_host
self.base_path = local_base_path
# Local input
self.cache_path = os.path.join(self.base_path, "cache")
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_path = os.path.join(self.conf_path, "type")
# FIXME: should not be needed anywhere
self.lib_path = os.path.join(self.base_path, "lib")
# Local output
self.out_path = out_path
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")
self.log = logging.getLogger(self.target_host)
def create_directories(self):
self.mkdir(self.out_path)
self.mkdir(self.bin_path)
def rmdir(self, path):
"""Remove directory on the local side."""
self.log.debug("Local rmdir: %s", path)
shutil.rmtree(path)
def mkdir(self, path):
"""Create directory on the local side."""
self.log.debug("Local mkdir: %s", path)
os.makedirs(path, mode=0o700, exist_ok=True)
def run(self, command, env=None):
"""Run the given command with the given environment.
Return the output as a string.
"""
assert isinstance(command, (list, tuple)), "list or tuple argument expected, got: %s" % command
self.log.debug("Local run: %s", command)
try:
return subprocess.check_output(command, env=env).decode()
except subprocess.CalledProcessError:
raise cdist.Error("Command failed: " + " ".join(command))
except OSError as error:
raise cdist.Error(" ".join(*args) + ": " + error.args[1])
def run_script(self, script, env=None):
"""Run the given script with the given environment.
Return the output as a string.
"""
command = ["/bin/sh", "-e"]
command.append(script)
self.log.debug("Local run script: %s", command)
if env:
self.log.debug("Local run script env: %s", env)
try:
return subprocess.check_output(command, env=env).decode()
except subprocess.CalledProcessError as error:
script_content = self.run(["cat", script])
self.log.error("Code that raised the error:\n%s", script_content)
raise LocalScriptError(script, command, script_content)
except EnvironmentError as error:
raise cdist.Error(" ".join(command) + ": " + error.args[1])
def link_emulator(self, exec_path):
"""Link emulator to types"""
src = os.path.abspath(exec_path)
for cdist_type in core.Type.list_types(self.type_path):
dst = os.path.join(self.bin_path, cdist_type.name)
self.log.debug("Linking emulator: %s to %s", src, dst)
# FIXME: handle exceptions
os.symlink(src, dst)