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import copy, gzip, lxml.etree, re, urllib
import os
import Bcfg2.Server.Plugin
# build sources.list?
# caching
# pinning
# multi apt-source from xml
def apt_source_from_xml(xsource):
ret = dict()
for key, tag in [('groups', 'Group'), ('components', 'Component'),
('arches', 'Arch')]:
ret[key] = [item.text for item in xsource.findall(tag)]
ret['version'] = xsource.find('Version').text
ret['url'] = xsource.find('URL').text
return ret
class APTSource(object):
def __init__(self, basepath, url, version, arches, components, groups):
self.basepath = basepath
self.version = version
self.components = components
self.url = url
self.urls = ["%s/dists/%s/%s/binary-%s/Packages.gz" % \
(url, version, part, arch) for part in components \
for arch in arches]
self.files = [self.mk_fname(url) for url in self.urls]
self.groups = groups
self.deps = dict()
self.provides = {}
def get_aptsrc(self):
return ["deb %s %s %s" % (self.url, self.version,
" ".join(self.components)),
"deb-src %s %s %s" % (self.url, self.version,
" ".join(self.components))]
def mk_fname(self, url):
return "%s/%s" % (self.basepath, url.replace('/', '_'))
def read_files(self):
bdeps = dict()
bprov = dict()
for fname in self.files:
bin = [x for x in fname.split('_') if x.startswith('binary-')][0][7:]
if bin not in bdeps:
bdeps[bin] = dict()
bprov[bin] = dict()
try:
reader = gzip.GzipFile(fname)
except:
print "failed to read file %s" % fname
continue
for line in reader.readlines():
words = line.strip().split(':', 1)
if words[0] == 'Package':
pkgname = words[1].strip().rstrip()
elif words[0] == 'Depends':
bdeps[bin][pkgname] = []
for dep in words[1].split(','):
raw_dep = re.sub('\(.*\)', '', dep)
if '|' in raw_dep:
# FIXME hack alert
raw_dep = raw_dep.split('|')[0]
raw_dep = raw_dep.rstrip().strip()
bdeps[bin][pkgname].append(raw_dep)
elif words[0] == 'Provides':
for pkg in words[1].split(','):
dname = pkg.rstrip().strip()
if dname not in bprov[bin]:
bprov[bin][dname] = set()
bprov[bin][dname].add(pkgname)
pkgnames = set()
self.deps['global'] = dict()
self.provides['global'] = dict()
for bin in bdeps:
[pkgnames.add(pname) for pname in bdeps[bin]]
self.deps[bin] = dict()
self.provides[bin] = dict()
for pkgname in pkgnames:
pset = set()
for bin in bdeps:
if pkgname not in bdeps[bin]:
bdeps[bin][pkgname] = []
pset.add(tuple(bdeps[bin][pkgname]))
if len(pset) == 1:
self.deps['global'][pkgname] = pset.pop()
else:
for bin in bdeps:
self.deps[bin][pkgname] = bdeps[bin][pkgname]
provided = set()
for bin in bprov:
for prov in bprov[bin]:
provided.add(prov)
for prov in provided:
prset = set()
for bin in bprov:
if prov not in bprov[bin]:
continue
prset.add(tuple(bprov[bin].get(prov, ())))
if len(prset) == 1:
self.provides['global'][prov] = prset.pop()
else:
for bin in bprov:
self.provides[bin][prov] = bprov[bin].get(prov, ())
def update(self):
for url in self.urls:
print "updating", url
fname = self.mk_fname(url)
data = urllib.urlopen(url).read()
output = file(fname, 'w').write(data)
def applies(self, metadata):
return len([g for g in metadata.groups if g in self.groups]) \
== len(self.groups)
def find_provides(self, metadata, pkgname):
arches = [ar for ar in self.provides if ar in metadata.groups]
for arch in ['global'] + arches:
if pkgname in self.provides[arch]:
# FIXME next round of provides HACK alert
return self.provides[arch][pkgname][0]
return False
def get_deps(self, metadata, pkgname):
data = False
if pkgname in self.deps['global']:
data = self.deps['global'][pkgname]
for arch in [ar for ar in self.deps if ar in metadata.groups]:
if pkgname in self.deps[arch]:
data = self.deps[arch][pkgname]
if data:
ret = list()
for item in data:
prov = self.find_provides(metadata, item)
if prov:
ret.append(prov)
else:
ret.append(item)
return tuple(ret)
return False
class Packages(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.StructureValidator,
Bcfg2.Server.Plugin.Generator):
name = 'Packages'
experimental = True
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
Bcfg2.Server.Plugin.StructureValidator.__init__(self)
Bcfg2.Server.Plugin.Generator.__init__(self)
cachepath = self.data + '/cache'
if not os.path.exists(cachepath):
# create cache directory if needed
os.mkdir(cachepath)
xdata = lxml.etree.parse(self.data + '/config.xml').getroot()
self.sources = []
for s in xdata.findall('APTSource'):
self.sources.append(APTSource(cachepath, **apt_source_from_xml(s)))
for source in self.sources:
try:
source.read_files()
except:
self.logger.info("File read failed; updating sources", exc_info=1)
source.update()
source.read_files()
self.pkgmap = dict()
def find_deps(self, metadata, pkgname):
for source in self.sources:
if source.applies(metadata):
deps = source.get_deps(metadata, pkgname)
if deps:
return deps
return ()
def HandlesEntry(self, entry, metadata):
if [x for x in metadata.groups if x in ['debian', 'ubuntu']] and \
entry.tag == 'Package':
return True
return False
def HandleEntry(self, entry, metadata):
entry.set('version', 'auto')
entry.set('type', 'deb')
def validate_structures(self, meta, structures):
if [g for g in meta.groups if g in ['debian', 'ubuntu']]:
ptype = 'deb'
else:
return
pkgnames = set()
for struct in structures:
for pkg in struct.findall('Package'):
pkgnames.add(pkg.get('name'))
all = copy.copy(pkgnames)
work = copy.copy(pkgnames)
new = set()
while work:
next = work.pop()
for dep in self.find_deps(meta, next):
if dep in all:
continue
else:
new.add(dep)
all.add(dep)
work.add(dep)
news = lxml.etree.Element('Independent')
for pkg in new:
lxml.etree.SubElement(news, 'BoundPackage', name=pkg,
type=ptype, version='auto')
structures.append(news)
if __name__ == '__main__':
aa = Packages(None, '/home/desai/tmp/bcfg2')
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