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#!/usr/bin/env python
"""List pip dependencies or system package dependencies for cloud-init."""
# You might be tempted to rewrite this as a shell script, but you
# would be surprised to discover that things like 'egrep' or 'sed' may
# differ between Linux and *BSD.
try:
from argparse import ArgumentParser
except ImportError:
raise RuntimeError(
'Could not import python-argparse. Please install python-argparse '
'package to continue')
import json
import os
import re
import subprocess
import sys
DEFAULT_REQUIREMENTS = 'requirements.txt'
# Map the appropriate package dir needed for each distro choice
DISTRO_PKG_TYPE_MAP = {
'centos': 'redhat',
'redhat': 'redhat',
'debian': 'debian',
'ubuntu': 'debian',
'opensuse': 'suse',
'suse': 'suse'
}
DISTRO_INSTALL_PKG_CMD = {
'centos': ['yum', 'install', '--assumeyes'],
'redhat': ['yum', 'install', '--assumeyes'],
'debian': ['apt', 'install', '-y'],
'ubuntu': ['apt', 'install', '-y'],
'opensuse': ['zypper', 'install'],
'suse': ['zypper', 'install']
}
# List of base system packages required to start using make
EXTRA_SYSTEM_BASE_PKGS = ['make', 'sudo', 'tar']
# JSON definition of distro-specific package dependencies
DISTRO_PKG_DEPS_PATH = "packages/pkg-deps.json"
def get_parser():
"""Return an argument parser for this command."""
parser = ArgumentParser(description=__doc__)
parser.add_argument(
'-r', '--requirements-file', type=str, dest='req_files',
action='append', default=None,
help='pip-style requirements file [default=%s]' % DEFAULT_REQUIREMENTS)
parser.add_argument(
'-d', '--distro', type=str, choices=DISTRO_PKG_TYPE_MAP.keys(),
help='The name of the distro to generate package deps for.')
parser.add_argument(
'--dry-run', action='store_true', default=False, dest='dry_run',
help='Dry run the install, making no package changes.')
parser.add_argument(
'-s', '--system-pkg-names', action='store_true', default=False,
dest='system_pkg_names',
help='The name of the distro to generate package deps for.')
parser.add_argument(
'-i', '--install', action='store_true', default=False,
dest='install',
help='When specified, install the required system packages.')
parser.add_argument(
'-v', '--python-version', type=str, dest='python_version', default="2",
choices=["2", "3"],
help='The version of python we want to generate system package '
'dependencies for.')
return parser
def get_package_deps_from_json(topdir, distro):
"""Get a dict of build and runtime package requirements for a distro.
@param topdir: The root directory in which to search for the
DISTRO_PKG_DEPS_PATH json blob of package requirements information.
@param distro: The specific distribution shortname to pull dependencies
for.
@return: Dict containing "requires", "build-requires" and "rename" lists
for a given distribution.
"""
with open(os.path.join(topdir, DISTRO_PKG_DEPS_PATH), 'r') as stream:
deps = json.loads(stream.read())
if distro is None:
return {}
return deps[DISTRO_PKG_TYPE_MAP[distro]]
def parse_pip_requirements(requirements_path):
"""Return the pip requirement names from pip-style requirements_path."""
dep_names = []
with open(requirements_path, "r") as fp:
for line in fp:
line = line.strip()
if not line or line.startswith("#"):
continue
# remove pip-style markers
dep = line.split(';')[0]
# remove version requirements
if re.search('[>=.<]+', dep):
dep_names.append(re.split(r'[>=.<]+', dep)[0].strip())
else:
dep_names.append(dep)
return dep_names
def translate_pip_to_system_pkg(pip_requires, renames, python_ver="2"):
"""Translate pip package names to distro-specific package names.
@param pip_requires: List of versionless pip package names to translate.
@param renames: Dict containg special case renames from pip name to system
package name for the distro.
"""
if python_ver == "2":
prefix = "python-"
else:
prefix = "python3-"
standard_pkg_name = "{0}{1}"
translated_names = []
for pip_name in pip_requires:
pip_name = pip_name.lower()
# Find a rename if present for the distro package and python version
rename = renames.get(pip_name, {}).get(python_ver, None)
if rename:
translated_names.append(rename)
else:
translated_names.append(
standard_pkg_name.format(prefix, pip_name))
return translated_names
def main(distro):
parser = get_parser()
args = parser.parse_args()
if 'CLOUD_INIT_TOP_D' in os.environ:
topd = os.path.realpath(os.environ.get('CLOUD_INIT_TOP_D'))
else:
topd = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
if args.req_files is None:
args.req_files = [os.path.join(topd, DEFAULT_REQUIREMENTS)]
if not os.path.isfile(args.req_files[0]):
sys.stderr.write("Unable to locate '%s' file that should "
"exist in cloud-init root directory." %
args.req_files[0])
sys.exit(1)
bad_files = [r for r in args.req_files if not os.path.isfile(r)]
if bad_files:
sys.stderr.write(
"Unable to find requirements files: %s\n" % ','.join(bad_files))
sys.exit(1)
pip_pkg_names = set()
for req_path in args.req_files:
pip_pkg_names.update(set(parse_pip_requirements(req_path)))
deps_from_json = get_package_deps_from_json(topd, args.distro)
renames = deps_from_json.get('renames', {})
translated_pip_names = translate_pip_to_system_pkg(
pip_pkg_names, renames, args.python_version)
all_deps = []
if args.distro:
all_deps.extend(
translated_pip_names + deps_from_json['requires'] +
deps_from_json['build-requires'])
else:
if args.system_pkg_names:
all_deps = translated_pip_names
else:
all_deps = pip_pkg_names
if args.install:
pkg_install(all_deps, args.distro, args.dry_run)
else:
print('\n'.join(all_deps))
def pkg_install(pkg_list, distro, dry_run=False):
"""Install a list of packages using the DISTRO_INSTALL_PKG_CMD."""
print('Installing deps: {0}{1}'.format(
'(dryrun)' if dry_run else '', ' '.join(pkg_list)))
pkg_list = list(pkg_list) + EXTRA_SYSTEM_BASE_PKGS
install_cmd = []
if dry_run:
install_cmd.append('echo')
if os.geteuid() != 0:
install_cmd.append('sudo')
install_cmd.extend(DISTRO_INSTALL_PKG_CMD[distro])
if distro in ['centos', 'redhat']:
# CentOS and Redhat need epel-release to access oauthlib and jsonschema
subprocess.check_call(install_cmd + ['epel-release'])
if distro in ['suse', 'opensuse', 'redhat', 'centos']:
pkg_list.append('rpm-build')
subprocess.check_call(install_cmd + pkg_list)
if __name__ == "__main__":
parser = get_parser()
args = parser.parse_args()
sys.exit(main(args.distro))
# vi: ts=4 expandtab
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