diskimage-builder/elements/package-installs/bin/package-installs-v2
Pino Toscano 7f410aaff2 package-installs: work with Python < 2.7
subprocess.check_output() has been introduced in Python 2.7, so the
script will fail when trying to install stuff in guests with Python 2.6
and older (like RHEL 6 / CentOS 6, for example).

Thus gracefully fallback to subprocess.Popen() when
subprocess.check_output() is not available.

Change-Id: I335148397932177810f095a942b993b249991107
Closes-Bug: #1415240
2015-02-25 17:46:08 +01:00

103 lines
3.4 KiB
Python
Executable File

#!/usr/bin/env python
# Copyright 2014 Hewlett-Packard Development Company, L.P.
#
# 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 argparse
import json
import subprocess
import sys
def process_output(cmdline):
# Try to execute subprocess.check_output(), which is available
# in Python 2.7+, gracefully falling back to subprocess.Popen
# in older Python versions.
try:
return subprocess.check_output(cmdline)
except AttributeError:
proc = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
out = proc.communicate()[0]
if proc.returncode:
raise subprocess.CalledProcessError(proc.returncode, cmdline, out)
return out
def main():
parser = argparse.ArgumentParser(
description="Install or uninstall packages for a specific phase based"
" on package-installs files.")
parser.add_argument('--phase', required=True,
help="Install phase to filter on. Valid options are"
" 'install.d' or pre-install.d")
parser.add_argument('--uninstall', action="store_true",
help="Only show packages to uninstall. By default only"
" packages to install are shown")
parser.add_argument('-n', '--noop', action="store_true",
help="Don't actually install, just print the command")
parser.add_argument('infile', help="File to process")
args = parser.parse_args()
packages = json.load(open(args.infile))
if args.uninstall:
install = "uninstall"
else:
install = "install"
pkgs = list()
if args.phase in packages and install in packages[args.phase]:
install_packages = packages[args.phase][install]
else:
print("Nothing to %s" % install)
sys.exit(0)
for (pkg, element) in install_packages:
print("%sing %s from %s" % (install, pkg, element))
pkg_map_args = ["pkg-map", "--missing-ok", "--element", element]
pkg_map_args.append(pkg)
try:
map_output = process_output(
pkg_map_args)
except subprocess.CalledProcessError as e:
if e.returncode == 1:
if args.noop:
pkgs.append(pkg)
continue
else:
print("pkg-map failed")
sys.exit(1)
elif e.returncode == 2:
pkgs.append(pkg)
continue
pkgs.extend(map_output.strip().split('\n'))
install_args = ["install-packages"]
if args.uninstall:
install_args.append("-e")
install_args.extend(list(set(pkgs)))
if args.noop:
print(" ".join(install_args))
else:
try:
process_output(install_args)
except subprocess.CalledProcessError as e:
print("install failed with error %s" % e.output)
sys.exit(1)
if __name__ == '__main__':
main()