charm-percona-cluster/charmhelpers/payload/execd.py
David Ames 9d81bcdd80 Pre-release charm-helpers sync 16.10
Get each charm up to date with lp:charm-helpers for release testing.

Change-Id: I2be9f6440620694e95e415b9ee6e4c77ff191fca
2016-09-30 09:20:13 -07:00

66 lines
2.2 KiB
Python

#!/usr/bin/env python
# Copyright 2014-2015 Canonical Limited.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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=True, stderr=subprocess.STDOUT):
"""Run command for each module within execd_dir which defines it."""
for submodule_path in execd_submodule_paths(command, execd_dir):
try:
subprocess.check_output(submodule_path, stderr=stderr,
universal_newlines=True)
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)