summaryrefslogtreecommitdiffstats
path: root/src/lib/Server/Plugins/Packages.py
blob: bcc5e9d3556bffabaa6d95291246c0090570d0be (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
import copy, gzip, lxml.etree, re, urllib2, logging
import os, cPickle
import Bcfg2.Server.Plugin, Bcfg2.Logger

# build sources.list?
# caching for yum 

class NoData(Exception):
    pass

logger = logging.getLogger('Packages')

def source_from_xml(xsource):
    ret = dict([('rawurl', False), ('url', False)])
    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
    if xsource.find('RawURL') is not None:
        ret['rawurl'] = xsource.find('RawURL').text
    else:
        ret['url'] = xsource.find('URL').text
    return ret

class Source(object):
    basegroups = []
    def __init__(self, basepath, url, version, arches, components, groups, rawurl):
        self.basepath = basepath
        self.version = version
        self.components = components
        self.url = url
        self.rawurl = rawurl
        self.groups = groups
        self.arches = arches
        self.deps = dict()
        self.provides = dict()
        self.cachefile = None

    def load_state(self):
        pass

    def setup_data(self):
        should_read = True
        should_download = False
        if os.path.exists(self.cachefile):
            try:
                self.load_state()
                should_read = False
            except:
                logger.error("Cachefile %s load failed; falling back to file read"\
                             % (self.cachefile))
        if should_read:
            try:
                self.read_files()
            except:
                logger.error("Packages: File read failed; falling back to file download")
                should_download = True

        if should_download:
            self.update()
            self.read_files()

    def get_urls(self):
        return []
    urls = property(get_urls)

    def get_files(self):
        return [self.escape_url(url) for url in self.urls]
    files = property(get_files)

    def escape_url(self, url):
        return "%s/%s" % (self.basepath, url.replace('/', '@'))

    def file_init(self):
        pass

    def read_files(self):
        pass
    
    def update(self):
        for url in self.urls:
            print "updating", url
            fname = self.escape_url(url)
            data = urllib2.urlopen(url).read()
            file(fname, 'w').write(data)

    def applies(self, metadata):
        return len([g for g in self.basegroups if g in metadata.groups]) != 0 and \
               len([g for g in metadata.groups if g in self.groups]) \
               == len(self.groups) 

    def get_arches(self, metadata):
        return ['global'] + [a for a in self.arches if a in metadata.groups]

    def get_deps(self, metadata, pkgname):
        for arch in self.get_arches(metadata):
            if pkgname in self.deps[arch]:
                return self.deps[arch][pkgname]
        raise NoData

    def get_provides(self, metadata, required):
        for arch in self.get_arches(metadata):
            if required in self.provides[arch]:
                return self.provides[arch][required]
        raise NoData

    def is_package(self, metadata, _):
        return False

    def complete(self, metadata, packages, unresolved, debug=False):
        # perhaps cache arch?
        #arch = [a for a in self.arches if a in metadata.groups][0]
        # return newpkg, unknown
        newpkg = set(packages)
        unknown = set()
        work = set(unresolved)
        seen = set()
        while work:
            item = work.pop()
            seen.add(item)
            if self.is_package(metadata, item):
                newpkg.add(item)
                try:
                    newdeps = [x for x in self.get_deps(metadata, item) \
                               if x not in newpkg and x not in work]
                    if debug and newdeps:
                        logger.debug("Package %s: adding new deps %s" \
                                     %(item, str(newdeps)))
                    work.update(newdeps)
                except NoData:
                    continue
            else:
                # provides dep
                try:
                    pset = self.get_provides(metadata, item)
                    if debug:
                        logger.debug("VPackage %s: got provides %s" \
                                     % (item, list(pset)))
                    if len(pset) == 1:
                        work.update(pset)
                    else:
                        if True not in [p in newpkg for p in pset]:
                            # FIXME: still hacky; unchosen multiple provides still not handled
                            unknown.add(item)
                except NoData:
                    unknown.add(item)
            work = work.difference(seen)
        return (newpkg, unknown)

class YUMSource(Source):
    xp = '{http://linux.duke.edu/metadata/common}'
    rp = '{http://linux.duke.edu/metadata/rpm}'
    rpo = '{http://linux.duke.edu/metadata/repo}'
    fl = '{http://linux.duke.edu/metadata/filelists}'
    basegroups = ['redhat', 'centos']
    ptype = 'yum'
    
    def __init__(self, basepath, url, version, arches, components, groups, rawurl):
        Source.__init__(self, basepath, url, version, arches, components,
                        groups, rawurl)
        if not self.rawurl:
            self.baseurl = self.url + '%(version)s/%(component)s/%(arch)s/'
        else:
            self.baseurl = self.rawurl
        self.cachefile = self.escape_url(self.baseurl) + '.data'
        self.packages = dict()
        self.deps = dict([('global', dict())])
        self.provides = dict([('global', dict())])
        self.filemap = dict([(x, dict()) for x in ['global'] + self.arches])
        self.needed_paths = set()
        self.file_to_arch = dict()

    def save_state(self):
        cache = file(self.cachefile, 'wb')
        data = cPickle.dump((self.packages, self.deps, self.provides,
                             self.filemap), cache, 2)
        cache.close()

    def load_state(self):
        data = file(self.cachefile)
        (self.packages, self.deps, self.provides, \
         self.filemap) = cPickle.load(data)

    def get_urls(self):
        surls = list()
        for arch in self.arches:
            usettings = [{'version': self.version, 'component':comp,
                          'arch':arch} for comp in self.components]
            surls.append((arch, [self.baseurl % setting for setting in usettings]))
        urls = []
        for (sarch, surl_list) in surls:
            for surl in surl_list:
                rmdurl = surl + '/repodata/repomd.xml'
                try:
                    repomd = urllib2.urlopen(rmdurl).read()
                    xdata = lxml.etree.XML(repomd)
                except:
                    logger.error("Failed to process url %s" % rmdurl)
                    continue
                for elt in xdata.findall(self.rpo + 'data'):
                    if elt.get('type') not in ['filelists', 'primary']:
                        continue
                    floc = elt.find(self.rpo + 'location')
                    fullurl = surl + floc.get('href')
                    urls.append(fullurl)
                    self.file_to_arch[self.escape_url(fullurl)] = sarch
        return urls
    urls = property(get_urls)

    def read_files(self):
        for fname in [f for f in self.files if f.endswith('primary.xml.gz')]:
            farch = self.file_to_arch[fname]
            fdata = lxml.etree.parse(fname).getroot()
            self.parse_primary(fdata, farch)
        for fname in [f for f in self.files if f.endswith('filelists.xml.gz')]:
            farch = self.file_to_arch[fname]
            fdata = lxml.etree.parse(fname).getroot()
            self.parse_filelist(fdata, farch)
        # merge data
        sdata = self.packages.values()
        self.packages['global'] = copy.deepcopy(sdata.pop())
        while sdata:
            self.packages['global'].intersection(sdata.pop())

        for key in self.packages:
            if key == 'global':
                continue
            self.packages[key] = self.packages['global'].difference(self.packages[key])
        self.save_state()
        
    def parse_filelist(self, data, arch):
        for pkg in data.findall(self.fl + 'package'):
            for fentry in [fe for fe in pkg.findall(self.fl + 'file') \
                           if fe.text in self.needed_paths]:
                if fentry.text in self.filemap[arch]:
                    self.filemap[arch][fentry.text].add(pkg.get('name'))
                else:
                    self.filemap[arch][fentry.text] = set([pkg.get('name')])

    def parse_primary(self, data, arch):
        if arch not in self.packages:
            self.packages[arch] = set()
        if arch not in self.deps:
            self.deps[arch] = dict()
        if arch not in self.provides:
            self.provides[arch] = dict()
        for pkg in data.getchildren():
            if not pkg.tag.endswith('package'):
                continue
            pkgname = pkg.find(self.xp + 'name').text
            self.packages[arch].add(pkgname)

            pdata = pkg.find(self.xp + 'format')
            pre = pdata.find(self.rp + 'requires')
            self.deps[arch][pkgname] = set()
            for entry in pre.getchildren():
                self.deps[arch][pkgname].add(entry.get('name'))
                if entry.get('name').startswith('/'):
                    self.needed_paths.add(entry.get('name'))
            pro = pdata.find(self.rp + 'provides')
            if pro != None: 
                for entry in pro.getchildren():
                    prov = entry.get('name')
                    if prov not in self.provides[arch]:
                        self.provides[arch][prov] = list()
                    self.provides[arch][prov].append(pkgname)

    def is_package(self, metadata, item):
        arch = [a for a in self.arches if a in metadata.groups]
        if not arch:
            return False
        return item in self.packages['global'] or item in self.packages[arch[0]]

    def get_provides(self, metadata, required):
        ret = set()
        arches = [a for a in self.arches if a in metadata.groups]
        if not arches:
            raise NoData
        if required in self.provides['global']: 
            ret.update(Source.get_provides(self, metadata, required))
        elif required in self.provides[arches[0]]:
            ret.update(Source.get_provides(self, metadata, required))
        else:
            for arch in ['global'] + arches:
                if required in self.filemap[arch]:
                    ret.update(self.filemap[arch][required])
        if ret:
            return ret
        else:
            raise NoData

    def complete(self, metadata, packages, unknown, debug):
        p1, u1 = Source.complete(self, metadata, packages, unknown, debug)
        return (p1, set([u for u in u1 if not u.startswith('rpmlib')]))

class APTSource(Source):
    basegroups = ['debian', 'ubuntu', 'nexenta']
    ptype = 'deb'
    
    def __init__(self, basepath, url, version, arches, components, groups, rawurl):
        Source.__init__(self, basepath, url, version, arches, components, groups, rawurl)
        self.cachefile = self.escape_url(self.url) + '.data'
        self.pkgnames = set()

    def save_state(self):
        cache = file(self.cachefile, 'wb')
        data = cPickle.dump((self.pkgnames, self.deps, self.provides),
                             cache, 2)
        cache.close()

    def load_state(self):
        data = file(self.cachefile)
        self.pkgnames, self.deps, self.provides = cPickle.load(data)

    def get_urls(self):
        return ["%s/dists/%s/%s/binary-%s/Packages.gz" % \
                (self.url, self.version, part, arch) for part in self.components \
                for arch in self.arches]
    urls = property(get_urls)

    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 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
                raise Exception()
                continue
            for line in reader.readlines():
                words = line.strip().split(':', 1)
                if words[0] == 'Package':
                    pkgname = words[1].strip().rstrip()
                    self.pkgnames.add(pkgname)
                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)

        self.deps['global'] = dict()
        self.provides['global'] = dict()
        for bin in bdeps:
            self.deps[bin] = dict()
            self.provides[bin] = dict()
        for pkgname in self.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, ())
        self.save_state()

    def is_package(self, _, pkg):
        return pkg in self.pkgnames

    def get_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]:
                return set(self.provides[arch][pkgname])
        raise NoData

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'
        self.sentinels = set()
        if not os.path.exists(cachepath):
            # create cache directory if needed
            os.makedirs(cachepath)
        try:
            xdata = lxml.etree.parse(self.data + '/config.xml').getroot()
        except IOError, e:
            self.logger.error("Failed to read Packages configuration. Have"
                              " you created your config.xml file?")
            raise Bcfg2.Server.Plugin.PluginInitError
        self.sources = []
        for s in xdata.findall('APTSource'):
            self.sources.append(APTSource(cachepath, **source_from_xml(s)))
        for s in xdata.findall('YUMSource'):
            self.sources.append(YUMSource(cachepath, **source_from_xml(s)))
        for source in self.sources:
            source.setup_data()
            self.sentinels.update(source.basegroups)

    def get_matching_sources(self, meta):
        return [s for s in self.sources if s.applies(meta)]

    def HandlesEntry(self, entry, metadata):
        if [x for x in metadata.groups if x in self.sentinels] \
               and entry.tag == 'Package':
            return True
        return False

    def HandleEntry(self, entry, metadata):
        entry.set('version', 'auto')
        for source in self.sources:
            if [x for x in metadata.groups if x in source.basegroups]:
                entry.set('type', source.ptype)                

    def complete(self, meta, packages, debug=False):
        sources = self.get_matching_sources(meta)
        # reverse list so that priorities correspond to file order
        sources.reverse()
        ptype = set([s.ptype for s in sources])
        if len(ptype) < 1:
            return set(), set(), 'failed'
        pkgs = set(packages)
        unknown = set(packages)
        oldp = set()
        oldu = set()
        while unknown and (pkgs != oldp or unknown != oldu):
            # loop through sources until no progress is made
            oldp = pkgs
            oldu = unknown
            for source in sources:
                try:
                    pkgs, unknown = source.complete(meta, pkgs, unknown, debug)
                except:
                    self.logger.error("Packages: complete call failed unexpectedly:", exc_info=1)
        return pkgs, unknown, ptype.pop()

    def validate_structures(self, meta, structures):
        initial = set([pkg.get('name') for struct in structures \
                       for pkg in struct.findall('Package')])
        news = lxml.etree.Element('Independent')
        packages, unknown, ptype = self.complete(meta, initial)
        if unknown:
            self.logger.info("Got unknown entries")
            self.logger.info(list(unknown))
        for pkg in packages.difference(initial):
            lxml.etree.SubElement(news, 'BoundPackage', name=pkg,
                                  type=ptype, version='auto')
        structures.append(news)

if __name__ == '__main__':
    Bcfg2.Logger.setup_logging('Packages', to_console=True)
    aa = Packages(None, '/home/desai/tmp/bcfg2')