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import operator
import os
import subprocess
import sys
from xml.dom import minidom
scripts_dir = os.path.dirname(__file__)
base_dir = os.path.dirname(scripts_dir)
_cached_dname, _cached_dversion = None, None
def _pipe_lower(args) :
out, err = subprocess.Popen(args,
stdout=subprocess.PIPE).communicate()
return out.strip().lower()
def get_distribution():
global _cached_dname, _cached_dversion
if _cached_dname :
return _cached_dname, _cached_dversion
if 'SJH_DISTRIBUTION' in os.environ:
_cached_dname, _cached_dversion = os.environ['SJH_DISTRIBUTION'].split('-')
return _cached_dname, _cached_dversion
try:
_cached_dname = _pipe_lower(['lsb_release', '-is'])
_cached_dversion = _pipe_lower(['lsb_release', '-rs'])
except OSError:
pass
return _cached_dname, _cached_dversion
def check_package(package):
name, version = get_distribution()
if name in ['fedora', 'mandrivalinux']:
ret = subprocess.call(['rpm', '--quiet', '-q', package])
return ret == 0
elif name in ['ubuntu', 'debian']:
cmd = ["dpkg-query", "-f='${status}'", "-W", package]
out, err = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()
return out.find('install ok installed') != -1
return None
def _check_suffix(name, suffixes) :
"""
Returns a list of all matching suffixes for <name>.
"""
return [name for suffix in suffixes if name.endswith(suffix)]
_unstable_names = {
'debian': 'unstable',
'fedora': 'rawhide',
'mandrivalinux': 'cooker',
'ubuntu': 'unstable',
}
def _parse_dependencies(dname, dversion):
if not (dname and dversion):
return []
suffixes = ['alldistros.xml', '%s-allversions.xml' % (dname,),
'%s-%s.xml' % (dname, dversion)]
dirname = os.path.join(base_dir, 'config', 'sysdeps')
filenames = [os.path.join(dirname, fname)
for fname in os.listdir(dirname)
if _check_suffix(fname, suffixes)]
# check whether we have a file matching the exact distro version
if not [name for name in filenames if name.endswith(suffixes[-1])] :
# will break for unknown distros, but that's fine
# (=> bug report => add support for distro)
uversion = _unstable_names[dname]
if (dversion == uversion) :
# no config for unstable
return []
sys.stderr.write("Warning: unknown distro version, automatic fallback to %s.\n" % (uversion,))
return _parse_dependencies(dname, uversion)
return [minidom.parse(fname)
for fname in filenames if os.path.exists(fname)]
_cached_packages = None
def get_packages():
global _cached_packages
if _cached_packages is not None :
return _cached_packages
dname, dversion = get_distribution()
documents = _parse_dependencies(dname, dversion)
_cached_packages = []
if not documents :
return _cached_packages
roots = [doc.childNodes[0] for doc in documents]
for node in reduce(operator.add, [root.childNodes for root in roots]) :
if node.nodeType == node.ELEMENT_NODE:
if node.nodeName == 'package':
name = node.getAttribute('name')
if node.hasAttribute('source'):
source = node.getAttribute('source')
else:
source = None
_cached_packages.append((name, source))
return _cached_packages
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