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#!/usr/bin/env python
# Copyright 2014-2015 Canonical Limited.
#
# This file is part of charm-helpers.
#
# charm-helpers is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3 as
# published by the Free Software Foundation.
#
# charm-helpers 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>.
import os
import sys
import subprocess
from charmhelpers.core import hookenv
def default_execd_dir():
return os.path.join(os.environ['CHARM_DIR'], 'exec.d')
def execd_module_paths(execd_dir=None):
"""Generate a list of full paths to modules within execd_dir."""
if not execd_dir:
execd_dir = default_execd_dir()
if not os.path.exists(execd_dir):
return
for subpath in os.listdir(execd_dir):
module = os.path.join(execd_dir, subpath)
if os.path.isdir(module):
yield module
def execd_submodule_paths(command, execd_dir=None):
"""Generate a list of full paths to the specified command within exec_dir.
"""
for module_path in execd_module_paths(execd_dir):
path = os.path.join(module_path, command)
if os.access(path, os.X_OK) and os.path.isfile(path):
yield path
def execd_run(command, execd_dir=None, die_on_error=False, stderr=None):
"""Run command for each module within execd_dir which defines it."""
for submodule_path in execd_submodule_paths(command, execd_dir):
try:
subprocess.check_call(submodule_path, shell=True, stderr=stderr)
except subprocess.CalledProcessError as e:
hookenv.log("Error ({}) running {}. Output: {}".format(
e.returncode, e.cmd, e.output))
if die_on_error:
sys.exit(e.returncode)
def execd_preinstall(execd_dir=None):
"""Run charm-pre-install for each module within execd_dir."""
execd_run('charm-pre-install', execd_dir=execd_dir)
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