summaryrefslogtreecommitdiffstats
path: root/scripts/lib/mic/utils/misc.py
blob: 2c4a3ac3077ea016706e84df8553664b74610b16 (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
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
#!/usr/bin/python -tt
#
# Copyright (c) 2010, 2011 Intel Inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; version 2 of the License
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston, MA 02111-1307, USA.

import os
import sys
import time
import tempfile
import re
import shutil
import glob
import hashlib
import subprocess
import platform
import traceback


try:
    import sqlite3 as sqlite
except ImportError:
    import sqlite

try:
    from xml.etree import cElementTree
except ImportError:
    import cElementTree
xmlparse = cElementTree.parse

from mic import msger
from mic.utils.errors import CreatorError, SquashfsError
from mic.utils.fs_related import find_binary_path, makedirs
from mic.utils.grabber import myurlgrab
from mic.utils.proxy import get_proxy_for
from mic.utils import runner


RPM_RE  = re.compile("(.*)\.(.*) (.*)-(.*)")
RPM_FMT = "%(name)s.%(arch)s %(version)s-%(release)s"
SRPM_RE = re.compile("(.*)-(\d+.*)-(\d+\.\d+).src.rpm")


def build_name(kscfg, release=None, prefix = None, suffix = None):
    """Construct and return an image name string.

    This is a utility function to help create sensible name and fslabel
    strings. The name is constructed using the sans-prefix-and-extension
    kickstart filename and the supplied prefix and suffix.

    kscfg -- a path to a kickstart file
    release --  a replacement to suffix for image release
    prefix -- a prefix to prepend to the name; defaults to None, which causes
              no prefix to be used
    suffix -- a suffix to append to the name; defaults to None, which causes
              a YYYYMMDDHHMM suffix to be used

    Note, if maxlen is less then the len(suffix), you get to keep both pieces.

    """
    name = os.path.basename(kscfg)
    idx = name.rfind('.')
    if idx >= 0:
        name = name[:idx]

    if release is not None:
        suffix = ""
    if prefix is None:
        prefix = ""
    if suffix is None:
        suffix = time.strftime("%Y%m%d%H%M")

    if name.startswith(prefix):
        name = name[len(prefix):]

    prefix = "%s-" % prefix if prefix else ""
    suffix = "-%s" % suffix if suffix else ""

    ret = prefix + name + suffix
    return ret

def get_distro():
    """Detect linux distribution, support "meego"
    """

    support_dists = ('SuSE',
                     'debian',
                     'fedora',
                     'redhat',
                     'centos',
                     'meego',
                     'moblin',
                     'tizen')
    try:
        (dist, ver, id) = platform.linux_distribution( \
                              supported_dists = support_dists)
    except:
        (dist, ver, id) = platform.dist( \
                              supported_dists = support_dists)

    return (dist, ver, id)

def get_distro_str():
    """Get composited string for current linux distribution
    """
    (dist, ver, id) = get_distro()

    if not dist:
        return 'Unknown Linux Distro'
    else:
        distro_str = ' '.join(map(str.strip, (dist, ver, id)))
        return distro_str.strip()

_LOOP_RULE_PTH = None

def hide_loopdev_presentation():
    udev_rules = "80-prevent-loop-present.rules"
    udev_rules_dir = [
                       '/usr/lib/udev/rules.d/',
                       '/lib/udev/rules.d/',
                       '/etc/udev/rules.d/'
                     ]

    global _LOOP_RULE_PTH

    for rdir in udev_rules_dir:
        if os.path.exists(rdir):
            _LOOP_RULE_PTH = os.path.join(rdir, udev_rules)

    if not _LOOP_RULE_PTH:
        return

    try:
        with open(_LOOP_RULE_PTH, 'w') as wf:
            wf.write('KERNEL=="loop*", ENV{UDISKS_PRESENTATION_HIDE}="1"')

        runner.quiet('udevadm trigger')
    except:
        pass

def unhide_loopdev_presentation():
    global _LOOP_RULE_PTH

    if not _LOOP_RULE_PTH:
        return

    try:
        os.unlink(_LOOP_RULE_PTH)
        runner.quiet('udevadm trigger')
    except:
        pass

def extract_rpm(rpmfile, targetdir):
    rpm2cpio = find_binary_path("rpm2cpio")
    cpio = find_binary_path("cpio")

    olddir = os.getcwd()
    os.chdir(targetdir)

    msger.verbose("Extract rpm file with cpio: %s" % rpmfile)
    p1 = subprocess.Popen([rpm2cpio, rpmfile], stdout=subprocess.PIPE)
    p2 = subprocess.Popen([cpio, "-idv"], stdin=p1.stdout,
                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    (sout, serr) = p2.communicate()
    msger.verbose(sout or serr)

    os.chdir(olddir)

def compressing(fpath, method):
    comp_map = {
        "gz": "gzip",
        "bz2": "bzip2"
    }
    if method not in comp_map:
        raise CreatorError("Unsupport compress format: %s, valid values: %s"
                           % (method, ','.join(comp_map.keys())))
    cmd = find_binary_path(comp_map[method])
    rc = runner.show([cmd, "-f", fpath])
    if rc:
        raise CreatorError("Failed to %s file: %s" % (comp_map[method], fpath))

def taring(dstfile, target):
    import tarfile
    basen, ext = os.path.splitext(dstfile)
    comp = {".tar": None,
            ".gz": "gz", # for .tar.gz
            ".bz2": "bz2", # for .tar.bz2
            ".tgz": "gz",
            ".tbz": "bz2"}[ext]

    # specify tarball file path
    if not comp:
        tarpath = dstfile
    elif basen.endswith(".tar"):
        tarpath = basen
    else:
        tarpath = basen + ".tar"
    wf = tarfile.open(tarpath, 'w')

    if os.path.isdir(target):
        for item in os.listdir(target):
            wf.add(os.path.join(target, item), item)
    else:
        wf.add(target, os.path.basename(target))
    wf.close()

    if comp:
        compressing(tarpath, comp)
        # when dstfile ext is ".tgz" and ".tbz", should rename
        if not basen.endswith(".tar"):
            shutil.move("%s.%s" % (tarpath, comp), dstfile)

def ziping(dstfile, target):
    import zipfile
    wf = zipfile.ZipFile(dstfile, 'w', compression=zipfile.ZIP_DEFLATED)
    if os.path.isdir(target):
        for item in os.listdir(target):
            fpath = os.path.join(target, item)
            if not os.path.isfile(fpath):
                continue
            wf.write(fpath, item, zipfile.ZIP_DEFLATED)
    else:
        wf.write(target, os.path.basename(target), zipfile.ZIP_DEFLATED)
    wf.close()

pack_formats = {
    ".tar": taring,
    ".tar.gz": taring,
    ".tar.bz2": taring,
    ".tgz": taring,
    ".tbz": taring,
    ".zip": ziping,
}

def packing(dstfile, target):
    (base, ext) = os.path.splitext(dstfile)
    if ext in (".gz", ".bz2") and base.endswith(".tar"):
        ext = ".tar" + ext
    if ext not in pack_formats:
        raise CreatorError("Unsupport pack format: %s, valid values: %s"
                           % (ext, ','.join(pack_formats.keys())))
    func = pack_formats[ext]
    # func should be callable
    func(dstfile, target)

def human_size(size):
    """Return human readable string for Bytes size
    """

    if size <= 0:
        return "0M"
    import math
    measure = ['B', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y']
    expo = int(math.log(size, 1024))
    mant = float(size/math.pow(1024, expo))
    return "{0:.1f}{1:s}".format(mant, measure[expo])

def get_block_size(file_obj):
    """ Returns block size for file object 'file_obj'. Errors are indicated by
    the 'IOError' exception. """

    from fcntl import ioctl
    import struct

    # Get the block size of the host file-system for the image file by calling
    # the FIGETBSZ ioctl (number 2).
    binary_data = ioctl(file_obj, 2, struct.pack('I', 0))
    return struct.unpack('I', binary_data)[0]

def check_space_pre_cp(src, dst):
    """Check whether disk space is enough before 'cp' like
    operations, else exception will be raised.
    """

    srcsize  = get_file_size(src) * 1024 * 1024
    freesize = get_filesystem_avail(dst)
    if srcsize > freesize:
        raise CreatorError("space on %s(%s) is not enough for about %s files"
                           % (dst, human_size(freesize), human_size(srcsize)))

def calc_hashes(file_path, hash_names, start = 0, end = None):
    """ Calculate hashes for a file. The 'file_path' argument is the file
    to calculate hash functions for, 'start' and 'end' are the starting and
    ending file offset to calculate the has functions for. The 'hash_names'
    argument is a list of hash names to calculate. Returns the the list
    of calculated hash values in the hexadecimal form in the same order
    as 'hash_names'.
    """
    if end == None:
        end = os.path.getsize(file_path)

    chunk_size = 65536
    to_read = end - start
    read = 0

    hashes = []
    for hash_name in hash_names:
        hashes.append(hashlib.new(hash_name))

    with open(file_path, "rb") as f:
        f.seek(start)

        while read < to_read:
            if read + chunk_size > to_read:
                chunk_size = to_read - read
            chunk = f.read(chunk_size)
            for hash_obj in hashes:
                hash_obj.update(chunk)
            read += chunk_size

    result = []
    for hash_obj in hashes:
        result.append(hash_obj.hexdigest())

    return result

def get_md5sum(fpath):
    return calc_hashes(fpath, ('md5', ))[0]


def normalize_ksfile(ksconf, release, arch):
    '''
    Return the name of a normalized ks file in which macro variables
    @BUILD_ID@ and @ARCH@ are replace with real values.

    The original ks file is returned if no special macro is used, otherwise
    a temp file is created and returned, which will be deleted when program
    exits normally.
    '''

    if not release:
        release = "latest"
    if not arch or re.match(r'i.86', arch):
        arch = "ia32"

    with open(ksconf) as f:
        ksc = f.read()

    if "@ARCH@" not in ksc and "@BUILD_ID@" not in ksc:
        return ksconf

    msger.info("Substitute macro variable @BUILD_ID@/@ARCH@ in ks: %s" % ksconf)
    ksc = ksc.replace("@ARCH@", arch)
    ksc = ksc.replace("@BUILD_ID@", release)

    fd, ksconf = tempfile.mkstemp(prefix=os.path.basename(ksconf))
    os.write(fd, ksc)
    os.close(fd)

    msger.debug('normalized ks file:%s' % ksconf)

    def remove_temp_ks():
        try:
            os.unlink(ksconf)
        except OSError, err:
            msger.warning('Failed to remove temp ks file:%s:%s' % (ksconf, err))

    import atexit
    atexit.register(remove_temp_ks)

    return ksconf


def _check_mic_chroot(rootdir):
    def _path(path):
        return rootdir.rstrip('/') + path

    release_files = map(_path, [ "/etc/moblin-release",
                                 "/etc/meego-release",
                                 "/etc/tizen-release"])

    if not any(map(os.path.exists, release_files)):
        msger.warning("Dir %s is not a MeeGo/Tizen chroot env" % rootdir)

    if not glob.glob(rootdir + "/boot/vmlinuz-*"):
        msger.warning("Failed to find kernel module under %s" % rootdir)

    return

def selinux_check(arch, fstypes):
    try:
        getenforce = find_binary_path('getenforce')
    except CreatorError:
        return

    selinux_status = runner.outs([getenforce])
    if arch and arch.startswith("arm") and selinux_status == "Enforcing":
        raise CreatorError("Can't create arm image if selinux is enabled, "
                           "please run 'setenforce 0' to disable selinux")

    use_btrfs = filter(lambda typ: typ == 'btrfs', fstypes)
    if use_btrfs and selinux_status == "Enforcing":
        raise CreatorError("Can't create btrfs image if selinux is enabled,"
                           " please run 'setenforce 0' to disable selinux")

def get_image_type(path):
    def _get_extension_name(path):
        match = re.search("(?<=\.)\w+$", path)
        if match:
            return match.group(0)
        else:
            return None

    if os.path.isdir(path):
        _check_mic_chroot(path)
        return "fs"

    maptab = {
              "tar": "loop",
              "raw":"raw",
              "vmdk":"vmdk",
              "vdi":"vdi",
              "iso":"livecd",
              "usbimg":"liveusb",
             }

    extension = _get_extension_name(path)
    if extension in maptab:
        return maptab[extension]

    fd = open(path, "rb")
    file_header = fd.read(1024)
    fd.close()
    vdi_flag = "<<< Sun VirtualBox Disk Image >>>"
    if file_header[0:len(vdi_flag)] == vdi_flag:
        return maptab["vdi"]

    output = runner.outs(['file', path])
    isoptn = re.compile(r".*ISO 9660 CD-ROM filesystem.*(bootable).*")
    usbimgptn = re.compile(r".*x86 boot sector.*active.*")
    rawptn = re.compile(r".*x86 boot sector.*")
    vmdkptn = re.compile(r".*VMware. disk image.*")
    ext3fsimgptn = re.compile(r".*Linux.*ext3 filesystem data.*")
    ext4fsimgptn = re.compile(r".*Linux.*ext4 filesystem data.*")
    btrfsimgptn = re.compile(r".*BTRFS.*")
    if isoptn.match(output):
        return maptab["iso"]
    elif usbimgptn.match(output):
        return maptab["usbimg"]
    elif rawptn.match(output):
        return maptab["raw"]
    elif vmdkptn.match(output):
        return maptab["vmdk"]
    elif ext3fsimgptn.match(output):
        return "ext3fsimg"
    elif ext4fsimgptn.match(output):
        return "ext4fsimg"
    elif btrfsimgptn.match(output):
        return "btrfsimg"
    else:
        raise CreatorError("Cannot detect the type of image: %s" % path)


def get_file_size(filename):
    """ Return size in MB unit """
    cmd = ['du', "-s", "-b", "-B", "1M", filename]
    rc, duOutput  = runner.runtool(cmd)
    if rc != 0:
        raise CreatorError("Failed to run: %s" % ' '.join(cmd))
    size1 = int(duOutput.split()[0])

    cmd = ['du', "-s", "-B", "1M", filename]
    rc, duOutput = runner.runtool(cmd)
    if rc != 0:
        raise CreatorError("Failed to run: %s" % ' '.join(cmd))

    size2 = int(duOutput.split()[0])
    return max(size1, size2)


def get_filesystem_avail(fs):
    vfstat = os.statvfs(fs)
    return vfstat.f_bavail * vfstat.f_bsize

def convert_image(srcimg, srcfmt, dstimg, dstfmt):
    #convert disk format
    if dstfmt != "raw":
        raise CreatorError("Invalid destination image format: %s" % dstfmt)
    msger.debug("converting %s image to %s" % (srcimg, dstimg))
    if srcfmt == "vmdk":
        path = find_binary_path("qemu-img")
        argv = [path, "convert", "-f", "vmdk", srcimg, "-O", dstfmt,  dstimg]
    elif srcfmt == "vdi":
        path = find_binary_path("VBoxManage")
        argv = [path, "internalcommands", "converttoraw", srcimg, dstimg]
    else:
        raise CreatorError("Invalid soure image format: %s" % srcfmt)

    rc = runner.show(argv)
    if rc == 0:
        msger.debug("convert successful")
    if rc != 0:
        raise CreatorError("Unable to convert disk to %s" % dstfmt)

def uncompress_squashfs(squashfsimg, outdir):
    """Uncompress file system from squshfs image"""
    unsquashfs = find_binary_path("unsquashfs")
    args = [ unsquashfs, "-d", outdir, squashfsimg ]
    rc = runner.show(args)
    if (rc != 0):
        raise SquashfsError("Failed to uncompress %s." % squashfsimg)

def mkdtemp(dir = "/var/tmp", prefix = "wic-tmp-"):
    """ FIXME: use the dir in wic.conf instead """

    makedirs(dir)
    return tempfile.mkdtemp(dir = dir, prefix = prefix)

def get_repostrs_from_ks(ks):
    def _get_temp_reponame(baseurl):
        md5obj = hashlib.md5(baseurl)
        tmpreponame = "%s" % md5obj.hexdigest()
        return tmpreponame

    kickstart_repos = []

    for repodata in ks.handler.repo.repoList:
        repo = {}
        for attr in ('name',
                     'baseurl',
                     'mirrorlist',
                     'includepkgs', # val is list
                     'excludepkgs', # val is list
                     'cost',    # int
                     'priority',# int
                     'save',
                     'proxy',
                     'proxyuser',
                     'proxypasswd',
                     'proxypasswd',
                     'debuginfo',
                     'source',
                     'gpgkey',
                     'ssl_verify'):
            if hasattr(repodata, attr) and getattr(repodata, attr):
                repo[attr] = getattr(repodata, attr)

        if 'name' not in repo:
            repo['name'] = _get_temp_reponame(repodata.baseurl)

        kickstart_repos.append(repo)

    return kickstart_repos

def _get_uncompressed_data_from_url(url, filename, proxies):
    filename = myurlgrab(url, filename, proxies)
    suffix = None
    if filename.endswith(".gz"):
        suffix = ".gz"
        runner.quiet(['gunzip', "-f", filename])
    elif filename.endswith(".bz2"):
        suffix = ".bz2"
        runner.quiet(['bunzip2', "-f", filename])
    if suffix:
        filename = filename.replace(suffix, "")
    return filename

def _get_metadata_from_repo(baseurl, proxies, cachedir, reponame, filename,
                            sumtype=None, checksum=None):
    url = os.path.join(baseurl, filename)
    filename_tmp = str("%s/%s/%s" % (cachedir, reponame, os.path.basename(filename)))
    if os.path.splitext(filename_tmp)[1] in (".gz", ".bz2"):
        filename = os.path.splitext(filename_tmp)[0]
    else:
        filename = filename_tmp
    if sumtype and checksum and os.path.exists(filename):
        try:
            sumcmd = find_binary_path("%ssum" % sumtype)
        except:
            file_checksum = None
        else:
            file_checksum = runner.outs([sumcmd, filename]).split()[0]

        if file_checksum and file_checksum == checksum:
            return filename

    return _get_uncompressed_data_from_url(url,filename_tmp,proxies)

def get_metadata_from_repos(repos, cachedir):
    my_repo_metadata = []
    for repo in repos:
        reponame = repo['name']
        baseurl  = repo['baseurl']


        if 'proxy' in repo:
            proxy = repo['proxy']
        else:
            proxy = get_proxy_for(baseurl)

        proxies = None
        if proxy:
            proxies = {str(baseurl.split(":")[0]):str(proxy)}

        makedirs(os.path.join(cachedir, reponame))
        url = os.path.join(baseurl, "repodata/repomd.xml")
        filename = os.path.join(cachedir, reponame, 'repomd.xml')
        repomd = myurlgrab(url, filename, proxies)
        try:
            root = xmlparse(repomd)
        except SyntaxError:
            raise CreatorError("repomd.xml syntax error.")

        ns = root.getroot().tag
        ns = ns[0:ns.rindex("}")+1]

        filepaths = {}
        checksums = {}
        sumtypes = {}

        for elm in root.getiterator("%sdata" % ns):
            if elm.attrib["type"] == "patterns":
                filepaths['patterns'] = elm.find("%slocation" % ns).attrib['href']
                checksums['patterns'] = elm.find("%sopen-checksum" % ns).text
                sumtypes['patterns'] = elm.find("%sopen-checksum" % ns).attrib['type']
                break

        for elm in root.getiterator("%sdata" % ns):
            if elm.attrib["type"] in ("group_gz", "group"):
                filepaths['comps'] = elm.find("%slocation" % ns).attrib['href']
                checksums['comps'] = elm.find("%sopen-checksum" % ns).text
                sumtypes['comps'] = elm.find("%sopen-checksum" % ns).attrib['type']
                break

        primary_type = None
        for elm in root.getiterator("%sdata" % ns):
            if elm.attrib["type"] in ("primary_db", "primary"):
                primary_type = elm.attrib["type"]
                filepaths['primary'] = elm.find("%slocation" % ns).attrib['href']
                checksums['primary'] = elm.find("%sopen-checksum" % ns).text
                sumtypes['primary'] = elm.find("%sopen-checksum" % ns).attrib['type']
                break

        if not primary_type:
            continue

        for item in ("primary", "patterns", "comps"):
            if item not in filepaths:
                filepaths[item] = None
                continue
            if not filepaths[item]:
                continue
            filepaths[item] = _get_metadata_from_repo(baseurl,
                                                      proxies,
                                                      cachedir,
                                                      reponame,
                                                      filepaths[item],
                                                      sumtypes[item],
                                                      checksums[item])

        """ Get repo key """
        try:
            repokey = _get_metadata_from_repo(baseurl,
                                              proxies,
                                              cachedir,
                                              reponame,
                                              "repodata/repomd.xml.key")
        except CreatorError:
            repokey = None
            msger.debug("\ncan't get %s/%s" % (baseurl, "repodata/repomd.xml.key"))

        my_repo_metadata.append({"name":reponame,
                                 "baseurl":baseurl,
                                 "repomd":repomd,
                                 "primary":filepaths['primary'],
                                 "cachedir":cachedir,
                                 "proxies":proxies,
                                 "patterns":filepaths['patterns'],
                                 "comps":filepaths['comps'],
                                 "repokey":repokey})

    return my_repo_metadata

def get_rpmver_in_repo(repometadata):
    for repo in repometadata:
        if repo["primary"].endswith(".xml"):
            root = xmlparse(repo["primary"])
            ns = root.getroot().tag
            ns = ns[0:ns.rindex("}")+1]

            versionlist = []
            for elm in root.getiterator("%spackage" % ns):
                if elm.find("%sname" % ns).text == 'rpm':
                    for node in elm.getchildren():
                        if node.tag == "%sversion" % ns:
                            versionlist.append(node.attrib['ver'])

            if versionlist:
                return reversed(
                         sorted(
                           versionlist,
                           key = lambda ver: map(int, ver.split('.')))).next()

        elif repo["primary"].endswith(".sqlite"):
            con = sqlite.connect(repo["primary"])
            for row in con.execute("select version from packages where "
                                   "name=\"rpm\" ORDER by version DESC"):
                con.close()
                return row[0]

    return None

def get_arch(repometadata):
    archlist = []
    for repo in repometadata:
        if repo["primary"].endswith(".xml"):
            root = xmlparse(repo["primary"])
            ns = root.getroot().tag
            ns = ns[0:ns.rindex("}")+1]
            for elm in root.getiterator("%spackage" % ns):
                if elm.find("%sarch" % ns).text not in ("noarch", "src"):
                    arch = elm.find("%sarch" % ns).text
                    if arch not in archlist:
                        archlist.append(arch)
        elif repo["primary"].endswith(".sqlite"):
            con = sqlite.connect(repo["primary"])
            for row in con.execute("select arch from packages where arch not in (\"src\", \"noarch\")"):
                if row[0] not in archlist:
                    archlist.append(row[0])

            con.close()

    uniq_arch = []
    for i in range(len(archlist)):
        if archlist[i] not in rpmmisc.archPolicies.keys():
            continue
        need_append = True
        j = 0
        while j < len(uniq_arch):
            if archlist[i] in rpmmisc.archPolicies[uniq_arch[j]].split(':'):
                need_append = False
                break
            if uniq_arch[j] in rpmmisc.archPolicies[archlist[i]].split(':'):
                if need_append:
                    uniq_arch[j] = archlist[i]
                    need_append = False
                else:
                    uniq_arch.remove(uniq_arch[j])
                    continue
            j += 1
        if need_append:
             uniq_arch.append(archlist[i])

    return uniq_arch, archlist

def get_package(pkg, repometadata, arch = None):
    ver = ""
    target_repo = None
    if not arch:
        arches = []
    elif arch not in rpmmisc.archPolicies:
        arches = [arch]
    else:
        arches = rpmmisc.archPolicies[arch].split(':')
        arches.append('noarch')

    for repo in repometadata:
        if repo["primary"].endswith(".xml"):
            root = xmlparse(repo["primary"])
            ns = root.getroot().tag
            ns = ns[0:ns.rindex("}")+1]
            for elm in root.getiterator("%spackage" % ns):
                if elm.find("%sname" % ns).text == pkg:
                    if elm.find("%sarch" % ns).text in arches:
                        version = elm.find("%sversion" % ns)
                        tmpver = "%s-%s" % (version.attrib['ver'], version.attrib['rel'])
                        if tmpver > ver:
                            ver = tmpver
                            location = elm.find("%slocation" % ns)
                            pkgpath = "%s" % location.attrib['href']
                            target_repo = repo
                        break
        if repo["primary"].endswith(".sqlite"):
            con = sqlite.connect(repo["primary"])
            if arch:
                sql = 'select version, release, location_href from packages ' \
                      'where name = "%s" and arch IN ("%s")' % \
                      (pkg, '","'.join(arches))
                for row in con.execute(sql):
                    tmpver = "%s-%s" % (row[0], row[1])
                    if tmpver > ver:
                        ver = tmpver
                        pkgpath = "%s" % row[2]
                        target_repo = repo
                    break
            else:
                sql = 'select version, release, location_href from packages ' \
                      'where name = "%s"' % pkg
                for row in con.execute(sql):
                    tmpver = "%s-%s" % (row[0], row[1])
                    if tmpver > ver:
                        ver = tmpver
                        pkgpath = "%s" % row[2]
                        target_repo = repo
                    break
            con.close()
    if target_repo:
        makedirs("%s/packages/%s" % (target_repo["cachedir"], target_repo["name"]))
        url = os.path.join(target_repo["baseurl"], pkgpath)
        filename = str("%s/packages/%s/%s" % (target_repo["cachedir"], target_repo["name"], os.path.basename(pkgpath)))
        if os.path.exists(filename):
            ret = rpmmisc.checkRpmIntegrity('rpm', filename)
            if ret == 0:
                return filename

            msger.warning("package %s is damaged: %s" %
                          (os.path.basename(filename), filename))
            os.unlink(filename)

        pkg = myurlgrab(str(url), filename, target_repo["proxies"])
        return pkg
    else:
        return None

def get_source_name(pkg, repometadata):

    def get_bin_name(pkg):
        m = RPM_RE.match(pkg)
        if m:
            return m.group(1)
        return None

    def get_src_name(srpm):
        m = SRPM_RE.match(srpm)
        if m:
            return m.group(1)
        return None

    ver = ""
    target_repo = None

    pkg_name = get_bin_name(pkg)
    if not pkg_name:
        return None

    for repo in repometadata:
        if repo["primary"].endswith(".xml"):
            root = xmlparse(repo["primary"])
            ns = root.getroot().tag
            ns = ns[0:ns.rindex("}")+1]
            for elm in root.getiterator("%spackage" % ns):
                if elm.find("%sname" % ns).text == pkg_name:
                    if elm.find("%sarch" % ns).text != "src":
                        version = elm.find("%sversion" % ns)
                        tmpver = "%s-%s" % (version.attrib['ver'], version.attrib['rel'])
                        if tmpver > ver:
                            ver = tmpver
                            fmt = elm.find("%sformat" % ns)
                            if fmt:
                                fns = fmt.getchildren()[0].tag
                                fns = fns[0:fns.rindex("}")+1]
                                pkgpath = fmt.find("%ssourcerpm" % fns).text
                                target_repo = repo
                        break

        if repo["primary"].endswith(".sqlite"):
            con = sqlite.connect(repo["primary"])
            for row in con.execute("select version, release, rpm_sourcerpm from packages where name = \"%s\" and arch != \"src\"" % pkg_name):
                tmpver = "%s-%s" % (row[0], row[1])
                if tmpver > ver:
                    pkgpath = "%s" % row[2]
                    target_repo = repo
                break
            con.close()
    if target_repo:
        return get_src_name(pkgpath)
    else:
        return None

def get_pkglist_in_patterns(group, patterns):
    found = False
    pkglist = []
    try:
        root = xmlparse(patterns)
    except SyntaxError:
        raise SyntaxError("%s syntax error." % patterns)

    for elm in list(root.getroot()):
        ns = elm.tag
        ns = ns[0:ns.rindex("}")+1]
        name = elm.find("%sname" % ns)
        summary = elm.find("%ssummary" % ns)
        if name.text == group or summary.text == group:
            found = True
            break

    if not found:
        return pkglist

    found = False
    for requires in list(elm):
        if requires.tag.endswith("requires"):
            found = True
            break

    if not found:
        return pkglist

    for pkg in list(requires):
        pkgname = pkg.attrib["name"]
        if pkgname not in pkglist:
            pkglist.append(pkgname)

    return pkglist

def get_pkglist_in_comps(group, comps):
    found = False
    pkglist = []
    try:
        root = xmlparse(comps)
    except SyntaxError:
        raise SyntaxError("%s syntax error." % comps)

    for elm in root.getiterator("group"):
        id = elm.find("id")
        name = elm.find("name")
        if id.text == group or name.text == group:
            packagelist = elm.find("packagelist")
            found = True
            break

    if not found:
        return pkglist

    for require in elm.getiterator("packagereq"):
        if require.tag.endswith("packagereq"):
            pkgname = require.text
        if pkgname not in pkglist:
            pkglist.append(pkgname)

    return pkglist

def is_statically_linked(binary):
    return ", statically linked, " in runner.outs(['file', binary])

def setup_qemu_emulator(rootdir, arch):
    # mount binfmt_misc if it doesn't exist
    if not os.path.exists("/proc/sys/fs/binfmt_misc"):
        modprobecmd = find_binary_path("modprobe")
        runner.show([modprobecmd, "binfmt_misc"])
    if not os.path.exists("/proc/sys/fs/binfmt_misc/register"):
        mountcmd = find_binary_path("mount")
        runner.show([mountcmd, "-t", "binfmt_misc", "none", "/proc/sys/fs/binfmt_misc"])

    # qemu_emulator is a special case, we can't use find_binary_path
    # qemu emulator should be a statically-linked executable file
    qemu_emulator = "/usr/bin/qemu-arm"
    if not os.path.exists(qemu_emulator) or not is_statically_linked(qemu_emulator):
        qemu_emulator = "/usr/bin/qemu-arm-static"
    if not os.path.exists(qemu_emulator):
        raise CreatorError("Please install a statically-linked qemu-arm")

    # qemu emulator version check
    armv7_list = [arch for arch in rpmmisc.archPolicies.keys() if arch.startswith('armv7')]
    if arch in armv7_list:  # need qemu (>=0.13.0)
        qemuout = runner.outs([qemu_emulator, "-h"])
        m = re.search("version\s*([.\d]+)", qemuout)
        if m:
            qemu_version = m.group(1)
            if qemu_version < "0.13":
                raise CreatorError("Requires %s version >=0.13 for %s" % (qemu_emulator, arch))
        else:
            msger.warning("Can't get version info of %s, please make sure it's higher than 0.13.0" % qemu_emulator)

    if not os.path.exists(rootdir + "/usr/bin"):
        makedirs(rootdir + "/usr/bin")
    shutil.copy(qemu_emulator, rootdir + "/usr/bin/qemu-arm-static")
    qemu_emulator = "/usr/bin/qemu-arm-static"

    # disable selinux, selinux will block qemu emulator to run
    if os.path.exists("/usr/sbin/setenforce"):
        msger.info('Try to disable selinux')
        runner.show(["/usr/sbin/setenforce", "0"])

    # unregister it if it has been registered and is a dynamically-linked executable
    node = "/proc/sys/fs/binfmt_misc/arm"
    if os.path.exists(node):
        qemu_unregister_string = "-1\n"
        fd = open("/proc/sys/fs/binfmt_misc/arm", "w")
        fd.write(qemu_unregister_string)
        fd.close()

    # register qemu emulator for interpreting other arch executable file
    if not os.path.exists(node):
        qemu_arm_string = ":arm:M::\\x7fELF\\x01\\x01\\x01\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x02\\x00\\x28\\x00:\\xff\\xff\\xff\\xff\\xff\\xff\\xff\\x00\\xff\\xff\\xff\\xff\\xff\\xff\\xff\\xff\\xfa\\xff\\xff\\xff:%s:\n" % qemu_emulator
        fd = open("/proc/sys/fs/binfmt_misc/register", "w")
        fd.write(qemu_arm_string)
        fd.close()

    return qemu_emulator

def SrcpkgsDownload(pkgs, repometadata, instroot, cachedir):
    def get_source_repometadata(repometadata):
        src_repometadata=[]
        for repo in repometadata:
            if repo["name"].endswith("-source"):
                src_repometadata.append(repo)
        if src_repometadata:
            return src_repometadata
        return None

    def get_src_name(srpm):
        m = SRPM_RE.match(srpm)
        if m:
            return m.group(1)
        return None

    src_repometadata = get_source_repometadata(repometadata)

    if not src_repometadata:
        msger.warning("No source repo found")
        return None

    src_pkgs = []
    lpkgs_dict = {}
    lpkgs_path = []
    for repo in src_repometadata:
        cachepath = "%s/%s/packages/*.src.rpm" %(cachedir, repo["name"])
        lpkgs_path += glob.glob(cachepath)

    for lpkg in lpkgs_path:
        lpkg_name = get_src_name(os.path.basename(lpkg))
        lpkgs_dict[lpkg_name] = lpkg
    localpkgs = lpkgs_dict.keys()

    cached_count = 0
    destdir = instroot+'/usr/src/SRPMS'
    if not os.path.exists(destdir):
        os.makedirs(destdir)

    srcpkgset = set()
    for _pkg in pkgs:
        srcpkg_name = get_source_name(_pkg, repometadata)
        if not srcpkg_name:
            continue
        srcpkgset.add(srcpkg_name)

    for pkg in list(srcpkgset):
        if pkg in localpkgs:
            cached_count += 1
            shutil.copy(lpkgs_dict[pkg], destdir)
            src_pkgs.append(os.path.basename(lpkgs_dict[pkg]))
        else:
            src_pkg = get_package(pkg, src_repometadata, 'src')
            if src_pkg:
                shutil.copy(src_pkg, destdir)
                src_pkgs.append(src_pkg)
    msger.info("%d source packages gotten from cache" % cached_count)

    return src_pkgs

def strip_end(text, suffix):
    if not text.endswith(suffix):
        return text
    return text[:-len(suffix)]