summaryrefslogtreecommitdiffstats
path: root/scripts/reporead.py
blob: 99042014c78b07701491d7a8f1ff645a58168767 (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
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
reporead.py

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

Usage: reporead.py ARCH PATH
 ARCH:  architecture to update, and can be one of: i686, x86_64
 PATH:  full path to the repo.db.tar.gz file.

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

"""

###
### User Variables
###

# multi value blocks
REPOVARS = ['arch', 'backup', 'builddate', 'conflicts', 'csize', 
            'deltas', 'depends', 'desc', 'filename', 'files', 'force', 
            'groups', 'installdate', 'isize', 'license', 'md5sum', 
            'name', 'optdepends', 'packager', 'provides', 'reason', 
            'replaces', 'size', 'url', 'version']

###
### Imports
###

import os
import re
import sys
import tarfile
import logging
from datetime import datetime
from django.core.management import setup_environ
# mung the sys path to get to django root dir, no matter
# where we are called from
archweb_app_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
os.chdir(archweb_app_path)
sys.path[0] = archweb_app_path
import settings
setup_environ(settings)
from cStringIO import StringIO
from logging import WARNING,INFO,DEBUG
from main.models import Arch, Package, Repo

class SomethingFishyException(Exception):
    '''Raised when the database looks like its going to wipe out a bunch of
    packages.'''
    pass

###
### Initialization
###

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


###
### function and class definitions
###

class Pkg(object):
    """An interim 'container' object for holding Arch package data."""

    def __init__(self, val):
        selfdict = {}
        squash = ['arch', 'builddate', 'csize', 'desc', 'filename',
                  'installdate', 'isize', 'license', 'md5sum', 
                  'packager', 'size', 'url']
        
        selfdict['name'] = val['name'][0]
        del val['name']
        if 'desc' not in val:
            logger.warning("Package %s has no description" % selfdict['name'])
            val['desc'] = ''
        if 'url' not in val:
            val['url'] = ''
        for x in val.keys():
            if x in squash:
                if len(val[x]) == 0:
                    logger.warning("Package %s has no %s" % (selfdict['name'],x))
                selfdict[x] = ''.join(val[x])
                # make sure we don't have elements larger than the db char
                # fields
                if len(selfdict[x]) > 255:
                    selfdict[x] = selfdict[x][:254]
            elif x == 'force':
                selfdict[x] = True
            elif x == 'version':
                version = val[x][0].rsplit('-')
                selfdict['ver'] = version[0]
                selfdict['rel'] = version[1]
            elif x == 'reason':
                selfdict[x] = int(val[x][0])
            else:
                selfdict[x] = val[x]
        self.__dict__ = selfdict
    
    def __getattr__(self,name):
        if name == 'force':
            return False
        else:
            return None


def usage():
    """Print the usage of this application."""
    print __doc__.strip()


def fetchiter_dict(cursor):
    """
    Given a DB API 2.0 cursor object that has been executed, returns a 
    dictionary that maps each field to a column index
    """
    rows = cursor.fetchmany(size=30)
    while rows:
        for row in rows:
            #pp(rows)
            #for row in rows:
            yield dictize(cursor,row)
        rows = cursor.fetchmany(size=30)


def fetchone_dict(cursor):
    """
    Given a DB API 2.0 cursor object that has been executed, returns a 
    dictionary that maps each field to a column index
    """
    results = {}
    row = cursor.fetchone()
    return dictize(cursor,row)


def dictize(cursor,row):
    result = {}
    for column,desc in enumerate(cursor.description):
        result[desc[0]] = row[column]
    return result


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

    Arguments:
      pkgs -- A list of Pkg objects.
    
    """
    logger.info('Updating Arch: %s' % archname)
    repository = Repo.objects.get(name__iexact=pkgs[0].repo)
    architecture = Arch.objects.get(name__iexact=archname)
    dbpkgs = Package.objects.filter(arch=architecture, repo=repository)
    # It makes sense to fully evaluate our DB query now because we will
    # be using 99% of the objects in our "in both sets" loop. Force eval
    # by calling len() on the QuerySet.
    dblist = list(dbpkgs)
    now = datetime.now()

    # go go set theory!
    # thank you python for having a set class <3
    logger.debug("Creating sets")
    dbset = set([pkg.pkgname for pkg in dbpkgs])
    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))
    # packages in syncdb and not in database (add to database)
    logger.debug("Set theory: Packages in syncdb not in database")
    in_sync_not_db = syncset - dbset
    logger.info("%d packages in sync not db" % len(in_sync_not_db))

    # Try to catch those random orphaning issues that make Eric so unhappy.
    if len(syncset) < len(dbset) * .5:
        logger.error(".db.tar.gz has less than 50% the number of packages in the web database")
        raise SomethingFishyException(
            'it looks like the syncdb is twice as big as the new'
            'packages. WTF?')

    if len(syncset) < len(dbset) * .75:
        logger.warning(".db.tar.gz has 75% the number of packages in the web database.")
    
    for p in [x for x in pkgs if x.name in in_sync_not_db]:
        logger.debug("Adding package %s", p.name)
        ## note: maintainer is being set to orphan for now
        ## maybe later we can add logic to match pkgbuild maintainers 
        ## to db maintainer ids
        pkg = Package(
            repo = repository, arch=architecture, maintainer_id = 0,
            needupdate = False, url = p.url, last_update = now,
            pkgname = p.name, pkgver = p.ver, pkgrel = p.rel, 
            pkgdesc = p.desc)
        pkg.save()
        # files are not in the repo.db.tar.gz
        #for x in p.files:
        #    pkg.packagefile_set.create(path=x)
        if 'depends' in p.__dict__:
            for y in p.depends:
                # make sure we aren't adding self depends..
                # yes *sigh* i have seen them in pkgbuilds
                dpname,dpvcmp = re.match(r"([a-z0-9._-]+)(.*)", y).groups()
                if dpname == p.name:
                    logger.warning('Package %s has a depend on itself' % p.name)
                    continue
                pkg.packagedepend_set.create(depname=dpname, depvcmp=dpvcmp)
                logger.debug('Added %s as dep for pkg %s' % (dpname,p.name))

    # packages in database and not in syncdb (remove from database)
    logger.debug("Set theory: Packages in database not in syncdb")
    in_db_not_sync = dbset - syncset
    for p in in_db_not_sync:
        logger.info("Removing package %s from database", p)
        Package.objects.get(
            pkgname=p, arch=architecture, repo=repository).delete()

    # packages in both database and in syncdb (update in database)
    logger.debug("Set theory: Packages in database and syncdb")
    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 = dbpkgs.get(pkgname=p.name)
        if ''.join((p.ver,p.rel)) == ''.join((dbp.pkgver,dbp.pkgrel)):
            continue
        logger.info("Updating package %s in database", p.name)
        pkg = Package.objects.get(
            pkgname=p.name,arch=architecture, repo=repository)
        pkg.pkgver = p.ver
        pkg.pkgrel = p.rel
        pkg.pkgdesc = p.desc
        pkg.url = p.url
        pkg.needupdate = False
        pkg.last_update = now
        pkg.save()
       
        # files are not in the repo.db.tar.gz
        #pkg.packagefile_set.all().delete()
        #for x in p.files:
        #    pkg.packagefile_set.create(path=x)
        pkg.packagedepend_set.all().delete()
        if 'depends' in p.__dict__:
            for y in p.depends:
                dpname,dpvcmp = re.match(r"([a-z0-9-]+)(.*)", y).groups()
                pkg.packagedepend_set.create(depname=dpname, depvcmp=dpvcmp)
    logger.info('Finished updating Arch: %s' % archname)


def parse_inf(iofile):
    """
    Parses an Arch repo db information file, and returns variables as a list.

    Arguments:
     iofile -- A StringIO, FileType, or other object with readlines method.

    """
    store = {}
    lines = iofile.readlines()
    blockname = None
    max = len(lines)
    i = 0
    while i < max:
        line = lines[i].strip()
        if len(line) > 0 and line[0] == '%' and line[1:-1].lower() in REPOVARS:
            blockname = line[1:-1].lower()
            logger.debug("Parsing package block %s",blockname)
            store[blockname] = []
            i += 1
            while i < max and len(lines[i].strip()) > 0:
                store[blockname].append(lines[i].strip())
                i += 1
            # here is where i would convert arrays to strings
            # based on count and type, but i dont think it is needed now
        i += 1

    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]
    rindex = filename.rindex('.db.tar.gz')
    reponame = filename[:rindex]
    
    repodb = tarfile.open(repopath,"r:gz")
    ## assuming well formed tar, with dir first then files after
    ## repo-add enforces this
    logger.debug("Starting package parsing")
    pkgs = []
    tpkg = None
    while True:
        tarinfo = repodb.next()
        if tarinfo == None or tarinfo.isdir():
            if tpkg != None:
                tpkg.reset()
                data = parse_inf(tpkg)
                p = Pkg(data)
                p.repo = reponame
                logger.debug("Done parsing package %s", p.name)
                pkgs.append(p)
            if tarinfo == None:
                break
            # set new tpkg
            tpkg = StringIO()
        if tarinfo.isreg():
            if os.path.split(tarinfo.name)[1] in ('desc','depends'):
                tpkg.write(repodb.extractfile(tarinfo).read())
                tpkg.write('\n') # just in case 
    repodb.close()
    logger.info("Finished repo parsing")
    return pkgs


def main(argv=None):
    """
    Parses repo.db.tar.gz file and returns exit status.

    Keyword Arguments:
     argv -- A list/array simulating a sys.argv (default None)
             If left empty, sys.argv is used

    """
    if argv == None:
        argv = sys.argv
    if len(argv) != 3:
        usage()
        return 0
    # check if arch is valid
    available_arches = [x.name for x in Arch.objects.all()]
    if argv[1] not in available_arches:
        usage()
        return 0
    else:
        primary_arch = argv[1]

    repo_file = os.path.normpath(argv[2])
    packages = parse_repo(repo_file)
    
    # sort packages by arch -- to handle noarch stuff
    packages_arches = {}
    for arch in available_arches:
        packages_arches[arch] = []
    
    for package in packages:
        if package.arch in ('any', primary_arch):
            packages_arches[package.arch].append(package)
        else:
            logger.warning("Package %s arch = %s" % (
                package.name,package.arch))
            #package.arch = primary_arch


    logger.info('Starting database updates.')
    for (arch, pkgs) in packages_arches.iteritems():
        if len(pkgs) > 0:
            db_update(arch,pkgs)
    logger.info('Finished database updates.')
    return 0


###
### Main eval 
###

if __name__ == '__main__':
    logger.level = INFO
    sys.exit(main())