summaryrefslogtreecommitdiff
path: root/devel/management/commands/reporead.py
blob: e26bb8002dec877dab0e43a038ec5d621eba031e (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
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
# -*- coding: utf-8 -*-
"""
reporead command

Parses a repo.db.tar.gz file and updates the Arch database with the relevant
changes.

Usage: ./manage.py reporead ARCH PATH
 ARCH:  architecture to update; must be available in the database
 PATH:  full path to the repo.db.tar.gz file.

Example:
  ./manage.py reporead i686 /tmp/core.db.tar.gz
"""

from django.core.management.base import BaseCommand, CommandError
from django.contrib.auth.models import User
from django.db import transaction
from django.db.models import Q

import codecs
import os
import re
import sys
import tarfile
import logging
from datetime import datetime
from optparse import make_option

# New in 2.6, but fast (C implementation) in 2.7. We will use it over codecs if
# available. Eventually remove the codecs import completely.
io = None
try:
    import io
except ImportError:
    pass

from main.models import Arch, Package, PackageDepend, PackageFile, Repo
from packages.models import Conflict, Provision, Replacement

logging.basicConfig(
    level=logging.WARNING,
    format='%(asctime)s -> %(levelname)s: %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S',
    stream=sys.stderr)
logger = logging.getLogger()

class Command(BaseCommand):
    option_list = BaseCommand.option_list + (
        make_option('-f', '--force', action='store_true', dest='force', default=False,
            help='Force a re-import of data for all packages instead of only new ones. Will not touch the \'last updated\' value.'),
        make_option('--filesonly', action='store_true', dest='filesonly', default=False,
            help='Load filelists if they are outdated, but will not add or remove any packages. Will not touch the \'last updated\' value.'),
    )
    help = "Runs a package repository import for the given arch and file."
    args = "<arch> <filename>"

    def handle(self, arch=None, filename=None, **options):
        if not arch:
            raise CommandError('Architecture is required.')
        if not validate_arch(arch):
            raise CommandError('Specified architecture %s is not currently known.' % arch)
        if not filename:
            raise CommandError('Package database file is required.')
        filename = os.path.normpath(filename)
        if not os.path.exists(filename) or not os.path.isfile(filename):
            raise CommandError('Specified package database file does not exist.')

        v = int(options.get('verbosity', 0))
        if v == 0:
            logger.level = logging.ERROR
        elif v == 1:
            logger.level = logging.INFO
        elif v == 2:
            logger.level = logging.DEBUG

        import signal, traceback
        handler = lambda sig, stack: traceback.print_stack(stack)
        signal.signal(signal.SIGQUIT, handler)
        signal.signal(signal.SIGUSR1, handler)

        return read_repo(arch, filename, options)


class Pkg(object):
    """An interim 'container' object for holding Arch package data."""
    bare = ( 'name', 'base', 'arch', 'desc', 'filename',
            'md5sum', 'url', 'builddate', 'packager' )
    number = ( 'csize', 'isize' )
    collections = ( 'depends', 'optdepends', 'conflicts',
            'provides', 'replaces', 'groups', 'license', 'files' )

    version_re = re.compile(r'^((\d+):)?(.+)-([^-]+)$')

    def __init__(self, repo):
        self.repo = repo
        self.ver = None
        self.rel = None
        self.epoch = 0
        for k in self.bare + self.number:
            setattr(self, k, None)
        for k in self.collections:
            setattr(self, k, ())
        # So we can tell the diffence between a package with no files, and a DB
        # without files entries
        self.has_files = False

    def populate(self, values):
        for k, v in values.iteritems():
            # ensure we stay under our DB character limit
            if k in self.bare:
                setattr(self, k, v[0][:254])
            elif k in self.number:
                setattr(self, k, long(v[0]))
            elif k == 'version':
                match = self.version_re.match(v[0])
                self.ver = match.group(3)
                self.rel = match.group(4)
                if match.group(2):
                    self.epoch = int(match.group(2))
            elif k == 'files':
                self.files = v
                self.has_files = True
            else:
                # anything left in collections
                setattr(self, k, v)

    @property
    def full_version(self):
        '''Very similar to the main.models.Package method.'''
        if self.epoch > 0:
            return u'%d:%s-%s' % (self.epoch, self.ver, self.rel)
        return u'%s-%s' % (self.ver, self.rel)


def find_user(userstring):
    '''
    Attempt to find the corresponding User object for a standard
    packager string, e.g. something like
        'A. U. Thor <author@example.com>'.
    We start by searching for a matching email address; we then move onto
    matching by first/last name. If we cannot find a user, then return None.
    '''
    if userstring in find_user.cache:
        return find_user.cache[userstring]
    matches = re.match(r'^([^<]+)? ?<([^>]*)>', userstring)
    if not matches:
        return None

    user = None
    name = matches.group(1)
    email = matches.group(2)

    def user_email():
        return User.objects.get(email=email)
    def profile_email():
        return User.objects.get(userprofile__public_email=email)
    def user_name():
        # yes, a bit odd but this is the easiest way since we can't always be
        # sure how to split the name. Ensure every 'token' appears in at least
        # one of the two name fields.
        name_q = Q()
        for token in name.split():
            # ignore quoted parts; e.g. nicknames in strings
            if re.match(r'^[\'"].*[\'"]$', token):
                continue
            name_q &= (Q(first_name__icontains=token) |
                    Q(last_name__icontains=token))
        return User.objects.get(name_q)

    for matcher in (user_email, profile_email, user_name):
        try:
            user = matcher()
            break
        except (User.DoesNotExist, User.MultipleObjectsReturned):
            pass

    find_user.cache[userstring] = user
    return user

# cached mappings of user strings -> User objects so we don't have to do the
# lookup more than strictly necessary.
find_user.cache = {}

DEPEND_RE = re.compile(r"^(.+?)((>=|<=|=|>|<)(.*))?$")

def create_depend(package, dep_str, optional=False):
    depend = PackageDepend(pkg=package, optional=optional)
    # lop off any description first
    parts = dep_str.split(':', 1)
    if len(parts) > 1:
        depend.description = parts[1].strip()
    match = DEPEND_RE.match(parts[0].strip())
    if match:
        depend.depname = match.group(1)
        if match.group(2):
            depend.depvcmp = match.group(2)
    else:
        logger.warning('Package %s had unparsable depend string %s',
                package.pkgname, dep_str)
        return None
    depend.save(force_insert=True)
    return depend

def create_related(model, package, rel_str, equals_only=False):
    related = model(pkg=package)
    match = DEPEND_RE.match(rel_str)
    if match:
        related.name = match.group(1)
        if match.group(3):
            comp = match.group(3)
            if not equals_only:
                related.comparison = comp
            elif comp != '=':
                logger.warning(
                        'Package %s had unexpected comparison operator %s for %s in %s',
                        package.pkgname, comp, model.__name__, rel_str)
        if match.group(4):
            related.version = match.group(4)
    else:
        logger.warning('Package %s had unparsable %s string %s',
                package.pkgname, model.___name__, rel_str)
        return None
    related.save(force_insert=True)
    return related

def create_multivalued(dbpkg, repopkg, db_attr, repo_attr):
    '''Populate the simplest of multivalued attributes. These are those that
    only deal with a 'name' attribute, such as licenses, groups, etc. The input
    and output objects and attribute names are specified, and everything is
    done via getattr().'''
    collection = getattr(dbpkg, db_attr)
    collection.all().delete()
    for name in getattr(repopkg, repo_attr):
        collection.create(name=name)

def populate_pkg(dbpkg, repopkg, force=False, timestamp=None):
    if repopkg.base:
        dbpkg.pkgbase = repopkg.base
    else:
        dbpkg.pkgbase = repopkg.name
    dbpkg.pkgver = repopkg.ver
    dbpkg.pkgrel = repopkg.rel
    dbpkg.epoch = repopkg.epoch
    dbpkg.pkgdesc = repopkg.desc
    dbpkg.url = repopkg.url
    dbpkg.filename = repopkg.filename
    dbpkg.compressed_size = repopkg.csize
    dbpkg.installed_size = repopkg.isize
    try:
        dbpkg.build_date = datetime.utcfromtimestamp(int(repopkg.builddate))
    except ValueError:
        try:
            dbpkg.build_date = datetime.strptime(repopkg.builddate,
                    '%a %b %d %H:%M:%S %Y')
        except ValueError:
            logger.warning('Package %s had unparsable build date %s',
                    repopkg.name, repopkg.builddate)
    dbpkg.packager_str = repopkg.packager
    # attempt to find the corresponding django user for this string
    dbpkg.packager = find_user(repopkg.packager)

    if timestamp:
        dbpkg.flag_date = None
        dbpkg.last_update = timestamp
    dbpkg.save()

    populate_files(dbpkg, repopkg, force=force)

    dbpkg.packagedepend_set.all().delete()
    for y in repopkg.depends:
        create_depend(dbpkg, y)
    for y in repopkg.optdepends:
        create_depend(dbpkg, y, True)

    dbpkg.conflicts.all().delete()
    for y in repopkg.conflicts:
        create_related(Conflict, dbpkg, y)
    dbpkg.provides.all().delete()
    for y in repopkg.provides:
        create_related(Provision, dbpkg, y, equals_only=True)
    dbpkg.replaces.all().delete()
    for y in repopkg.replaces:
        create_related(Replacement, dbpkg, y)

    create_multivalued(dbpkg, repopkg, 'groups', 'groups')
    create_multivalued(dbpkg, repopkg, 'licenses', 'license')


def populate_files(dbpkg, repopkg, force=False):
    if not force:
        if dbpkg.pkgver != repopkg.ver or dbpkg.pkgrel != repopkg.rel \
                or dbpkg.epoch != repopkg.epoch:
            logger.info("DB version (%s) didn't match repo version "
                    "(%s) for package %s, skipping file list addition",
                    dbpkg.full_version, repopkg.full_version, dbpkg.pkgname)
            return
        if not dbpkg.files_last_update or not dbpkg.last_update:
            pass
        elif dbpkg.files_last_update > dbpkg.last_update:
            return
    # only delete files if we are reading a DB that contains them
    if repopkg.has_files:
        dbpkg.packagefile_set.all().delete()
        logger.info("adding %d files for package %s",
                len(repopkg.files), dbpkg.pkgname)
        for f in repopkg.files:
            dirname, filename = f.rsplit('/', 1)
            if filename == '':
                filename = None
            # this is basically like calling dbpkg.packagefile_set.create(),
            # but much faster as we can skip a lot of the repeated code paths
            pkgfile = PackageFile(pkg=dbpkg,
                    is_directory=(filename is None),
                    directory=dirname + '/',
                    filename=filename)
            pkgfile.save(force_insert=True)
        dbpkg.files_last_update = datetime.now()
        dbpkg.save()

@transaction.commit_on_success
def db_update(archname, reponame, pkgs, options):
    """
    Parses a list and updates the Arch dev database accordingly.

    Arguments:
      pkgs -- A list of Pkg objects.

    """
    logger.info('Updating Arch: %s', archname)
    force = options.get('force', False)
    filesonly = options.get('filesonly', False)
    repository = Repo.objects.get(name__iexact=reponame)
    architecture = Arch.objects.get(name__iexact=archname)
    # no-arg order_by() removes even the default ordering; we don't need it
    dbpkgs = Package.objects.filter(
            arch=architecture, repo=repository).order_by()
    # This makes our inner loop where we find packages by name *way* more
    # efficient by not having to go to the database for each package to
    # SELECT them by name.
    dbdict = dict([(pkg.pkgname, pkg) for pkg in dbpkgs])

    logger.debug("Creating sets")
    dbset = set(dbdict.keys())
    syncset = set([pkg.name for pkg in pkgs])
    logger.info("%d packages in current web DB", len(dbset))
    logger.info("%d packages in new updating db", len(syncset))
    in_sync_not_db = syncset - dbset
    logger.info("%d packages in sync not db", len(in_sync_not_db))

    # Try to catch those random package deletions that make Eric so unhappy.
    if len(dbset):
        dbpercent = 100.0 * len(syncset) / len(dbset)
    else:
        dbpercent = 0.0
    logger.info("DB package ratio: %.1f%%", dbpercent)

    # Fewer than 20 packages makes the percentage check unreliable, but it also
    # means we expect the repo to fluctuate a lot.
    msg = "Package database has %.1f%% the number of packages in the " \
            "web database" % dbpercent
    if len(dbset) == 0 and len(syncset) == 0:
        pass
    elif not filesonly and \
            len(dbset) > 20 and dbpercent < 50.0 and \
            not repository.testing and not repository.staging:
        logger.error(msg)
        raise Exception(msg)
    elif dbpercent < 75.0:
        logger.warning(msg)

    if not filesonly:
        # packages in syncdb and not in database (add to database)
        for p in [x for x in pkgs if x.name in in_sync_not_db]:
            logger.info("Adding package %s", p.name)
            pkg = Package(pkgname = p.name, arch = architecture, repo = repository)
            populate_pkg(pkg, p, timestamp=datetime.now())

        # packages in database and not in syncdb (remove from database)
        in_db_not_sync = dbset - syncset
        for p in in_db_not_sync:
            logger.info("Removing package %s from database", p)
            dbp = dbdict[p]
            dbp.delete()

    # packages in both database and in syncdb (update in database)
    pkg_in_both = syncset & dbset
    for p in [x for x in pkgs if x.name in pkg_in_both]:
        logger.debug("Looking for package updates")
        dbp = dbdict[p.name]
        timestamp = None
        # for a force, we don't want to update the timestamp.
        # for a non-force, we don't want to do anything at all.
        if filesonly:
            pass
        elif p.ver == dbp.pkgver and p.rel == dbp.pkgrel \
                and p.epoch == dbp.epoch:
            if not force:
                continue
        else:
            timestamp = datetime.now()
        if filesonly:
            logger.debug("Checking files for package %s in database", p.name)
            populate_files(dbp, p, force=force)
        else:
            logger.info("Updating package %s in database", p.name)
            populate_pkg(dbp, p, force=force, timestamp=timestamp)

    logger.info('Finished updating Arch: %s', archname)


def parse_info(iofile):
    """
    Parses an Arch repo db information file, and returns variables as a list.
    """
    store = {}
    blockname = None
    for line in iofile:
        line = line.strip()
        if len(line) == 0:
            continue
        elif line.startswith('%') and line.endswith('%'):
            blockname = line[1:-1].lower()
            logger.debug("Parsing package block %s", blockname)
            store[blockname] = []
        elif blockname:
            store[blockname].append(line)
        else:
            raise Exception("Read package info outside a block: %s" % line)
    return store


def parse_repo(repopath):
    """
    Parses an Arch repo db file, and returns a list of Pkg objects.

    Arguments:
     repopath -- The path of a repository db file.

    """
    logger.info("Starting repo parsing")
    if not os.path.exists(repopath):
        logger.error("Could not read file %s", repopath)

    logger.info("Reading repo tarfile %s", repopath)
    filename = os.path.split(repopath)[1]
    m = re.match(r"^(.*)\.(db|files)\.tar(\..*)?$", filename)
    if m:
        reponame = m.group(1)
    else:
        logger.error("File does not have the proper extension")
        raise Exception("File does not have the proper extension")

    repodb = tarfile.open(repopath, "r")
    logger.debug("Starting package parsing")
    dbfiles = ('desc', 'depends', 'files')
    pkgs = {}
    for tarinfo in repodb.getmembers():
        if tarinfo.isreg():
            pkgid, fname = os.path.split(tarinfo.name)
            if fname not in dbfiles:
                continue
            data_file = repodb.extractfile(tarinfo)
            if io is None:
                data_file = codecs.EncodedFile(data_file, 'utf-8')
            else:
                data_file = io.TextIOWrapper(io.BytesIO(data_file.read()),
                        encoding='utf=8')
            try:
                data = parse_info(data_file)
                p = pkgs.setdefault(pkgid, Pkg(reponame))
                p.populate(data)
            except UnicodeDecodeError, e:
                logger.warn("Could not correctly decode %s, skipping file",
                        tarinfo.name)
            data_file.close()

            logger.debug("Done parsing file %s", fname)

    repodb.close()
    logger.info("Finished repo parsing, %d total packages", len(pkgs))
    return (reponame, pkgs.values())

def validate_arch(archname):
    "Check if arch is valid."
    return Arch.objects.filter(name__iexact=archname).exists()

def read_repo(primary_arch, repo_file, options):
    """
    Parses repo.db.tar.gz file and returns exit status.
    """
    repo, packages = parse_repo(repo_file)

    # group packages by arch -- to handle noarch stuff
    packages_arches = {}
    for arch in Arch.objects.filter(agnostic=True):
        packages_arches[arch.name] = []
    packages_arches[primary_arch] = []

    for package in packages:
        if package.arch in packages_arches:
            packages_arches[package.arch].append(package)
        else:
            # we don't include mis-arched packages
            logger.warning("Package %s arch = %s",
                package.name,package.arch)
    logger.info('Starting database updates.')
    for arch in sorted(packages_arches.keys()):
        db_update(arch, repo, packages_arches[arch], options)
    logger.info('Finished database updates.')
    return 0

# vim: set ts=4 sw=4 et: