aboutsummaryrefslogtreecommitdiffstats
path: root/interfaces/email/interactive/libbe/vcs.py
blob: a1d302264700e7993351b3ddda914b8ca50294ab (plain) (blame)
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
# Copyright (C) 2005-2009 Aaron Bentley and Panometrics, Inc.
#                         Alexander Belchenko <bialix@ukr.net>
#                         Ben Finney <ben+python@benfinney.id.au>
#                         Chris Ball <cjb@laptop.org>
#                         W. Trevor King <wking@drexel.edu>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

"""
Define the base VCS (Version Control System) class, which should be
subclassed by other Version Control System backends.  The base class
implements a "do not version" VCS.
"""

from subprocess import Popen, PIPE
import codecs
import os
import os.path
import re
from socket import gethostname
import shutil
import sys
import tempfile
import unittest
import doctest

from utility import Dir, search_parent_directories


def _get_matching_vcs(matchfn):
    """Return the first module for which matchfn(VCS_instance) is true"""
    import arch
    import bzr
    import darcs
    import git
    import hg
    for module in [arch, bzr, darcs, git, hg]:
        vcs = module.new()
        if matchfn(vcs) == True:
            return vcs
        del(vcs)
    return VCS()
    
def vcs_by_name(vcs_name):
    """Return the module for the VCS with the given name"""
    return _get_matching_vcs(lambda vcs: vcs.name == vcs_name)

def detect_vcs(dir):
    """Return an VCS instance for the vcs being used in this directory"""
    return _get_matching_vcs(lambda vcs: vcs.detect(dir))

def installed_vcs():
    """Return an instance of an installed VCS"""
    return _get_matching_vcs(lambda vcs: vcs.installed())


class CommandError(Exception):
    def __init__(self, command, status, stdout, stderr):
        strerror = ["Command failed (%d):\n  %s\n" % (status, stderr),
                    "while executing\n  %s" % command]
        Exception.__init__(self, "\n".join(strerror))
        self.command = command
        self.status = status
        self.stdout = stdout
        self.stderr = stderr

class SettingIDnotSupported(NotImplementedError):
    pass

class VCSnotRooted(Exception):
    def __init__(self):
        msg = "VCS not rooted"
        Exception.__init__(self, msg)

class PathNotInRoot(Exception):
    def __init__(self, path, root):
        msg = "Path '%s' not in root '%s'" % (path, root)
        Exception.__init__(self, msg)
        self.path = path
        self.root = root

class NoSuchFile(Exception):
    def __init__(self, pathname, root="."):
        path = os.path.abspath(os.path.join(root, pathname))
        Exception.__init__(self, "No such file: %s" % path)

class EmptyCommit(Exception):
    def __init__(self):
        Exception.__init__(self, "No changes to commit")


def new():
    return VCS()

class VCS(object):
    """
    This class implements a 'no-vcs' interface.

    Support for other VCSs can be added by subclassing this class, and
    overriding methods _vcs_*() with code appropriate for your VCS.
    
    The methods _u_*() are utility methods available to the _vcs_*()
    methods.
    """
    name = "None"
    client = "" # command-line tool for _u_invoke_client
    versioned = False
    def __init__(self, paranoid=False, encoding=sys.getdefaultencoding()):
        self.paranoid = paranoid
        self.verboseInvoke = False
        self.rootdir = None
        self._duplicateBasedir = None
        self._duplicateDirname = None
        self.encoding = encoding
    def __del__(self):
        self.cleanup()

    def _vcs_help(self):
        """
        Return the command help string.
        (Allows a simple test to see if the client is installed.)
        """
        pass
    def _vcs_detect(self, path=None):
        """
        Detect whether a directory is revision controlled with this VCS.
        """
        return True
    def _vcs_root(self, path):
        """
        Get the VCS root.  This is the default working directory for
        future invocations.  You would normally set this to the root
        directory for your VCS.
        """
        if os.path.isdir(path)==False:
            path = os.path.dirname(path)
            if path == "":
                path = os.path.abspath(".")
        return path
    def _vcs_init(self, path):
        """
        Begin versioning the tree based at path.
        """
        pass
    def _vcs_cleanup(self):
        """
        Remove any cruft that _vcs_init() created outside of the
        versioned tree.
        """
        pass
    def _vcs_get_user_id(self):
        """
        Get the VCS's suggested user id (e.g. "John Doe <jdoe@example.com>").
        If the VCS has not been configured with a username, return None.
        """
        return None
    def _vcs_set_user_id(self, value):
        """
        Set the VCS's suggested user id (e.g "John Doe <jdoe@example.com>").
        This is run if the VCS has not been configured with a usename, so
        that commits will have a reasonable FROM value.
        """
        raise SettingIDnotSupported
    def _vcs_add(self, path):
        """
        Add the already created file at path to version control.
        """
        pass
    def _vcs_remove(self, path):
        """
        Remove the file at path from version control.  Optionally
        remove the file from the filesystem as well.
        """
        pass
    def _vcs_update(self, path):
        """
        Notify the versioning system of changes to the versioned file
        at path.
        """
        pass
    def _vcs_get_file_contents(self, path, revision=None, binary=False):
        """
        Get the file contents as they were in a given revision.
        Revision==None specifies the current revision.
        """
        assert revision == None, \
            "The %s VCS does not support revision specifiers" % self.name
        if binary == False:
            f = codecs.open(os.path.join(self.rootdir, path), "r", self.encoding)
        else:
            f = open(os.path.join(self.rootdir, path), "rb")
        contents = f.read()
        f.close()
        return contents
    def _vcs_duplicate_repo(self, directory, revision=None):
        """
        Get the repository as it was in a given revision.
        revision==None specifies the current revision.
        dir specifies a directory to create the duplicate in.
        """
        shutil.copytree(self.rootdir, directory, True)
    def _vcs_commit(self, commitfile, allow_empty=False):
        """
        Commit the current working directory, using the contents of
        commitfile as the comment.  Return the name of the old
        revision (or None if commits are not supported).
        
        If allow_empty == False, raise EmptyCommit if there are no
        changes to commit.
        """
        return None
    def _vcs_revision_id(self, index):
        """
        Return the name of the <index>th revision.  Index will be an
        integer (possibly <= 0).  The choice of which branch to follow
        when crossing branches/merges is not defined.

        Return None if revision IDs are not supported, or if the
        specified revision does not exist.
        """
        return None
    def installed(self):
        try:
            self._vcs_help()
            return True
        except OSError, e:
            if e.errno == errno.ENOENT:
                return False
        except CommandError:
            return False
    def detect(self, path="."):
        """
        Detect whether a directory is revision controlled with this VCS.
        """
        return self._vcs_detect(path)
    def root(self, path):
        """
        Set the root directory to the path's VCS root.  This is the
        default working directory for future invocations.
        """
        self.rootdir = self._vcs_root(path)
    def init(self, path):
        """
        Begin versioning the tree based at path.
        Also roots the vcs at path.
        """
        if os.path.isdir(path)==False:
            path = os.path.dirname(path)
        self._vcs_init(path)
        self.root(path)
    def cleanup(self):
        self._vcs_cleanup()
    def get_user_id(self):
        """
        Get the VCS's suggested user id (e.g. "John Doe <jdoe@example.com>").
        If the VCS has not been configured with a username, return the user's
        id.  You can override the automatic lookup procedure by setting the
        VCS.user_id attribute to a string of your choice.
        """
        if hasattr(self, "user_id"):
            if self.user_id != None:
                return self.user_id
        id = self._vcs_get_user_id()
        if id == None:
            name = self._u_get_fallback_username()
            email = self._u_get_fallback_email()
            id = self._u_create_id(name, email)
            print >> sys.stderr, "Guessing id '%s'" % id
            try:
                self.set_user_id(id)
            except SettingIDnotSupported:
                pass
        return id
    def set_user_id(self, value):
        """
        Set the VCS's suggested user id (e.g "John Doe <jdoe@example.com>").
        This is run if the VCS has not been configured with a usename, so
        that commits will have a reasonable FROM value.
        """
        self._vcs_set_user_id(value)
    def add(self, path):
        """
        Add the already created file at path to version control.
        """
        self._vcs_add(self._u_rel_path(path))
    def remove(self, path):
        """
        Remove a file from both version control and the filesystem.
        """
        self._vcs_remove(self._u_rel_path(path))
        if os.path.exists(path):
            os.remove(path)
    def recursive_remove(self, dirname):
        """
        Remove a file/directory and all its decendents from both
        version control and the filesystem.
        """
        if not os.path.exists(dirname):
            raise NoSuchFile(dirname)
        for dirpath,dirnames,filenames in os.walk(dirname, topdown=False):
            filenames.extend(dirnames)
            for path in filenames:
                fullpath = os.path.join(dirpath, path)
                if os.path.exists(fullpath) == False:
                    continue
                self._vcs_remove(self._u_rel_path(fullpath))
        if os.path.exists(dirname):
            shutil.rmtree(dirname)
    def update(self, path):
        """
        Notify the versioning system of changes to the versioned file
        at path.
        """
        self._vcs_update(self._u_rel_path(path))
    def get_file_contents(self, path, revision=None, allow_no_vcs=False, binary=False):
        """
        Get the file as it was in a given revision.
        Revision==None specifies the current revision.
        """
        if not os.path.exists(path):
            raise NoSuchFile(path)
        if self._use_vcs(path, allow_no_vcs):
            relpath = self._u_rel_path(path)
            contents = self._vcs_get_file_contents(relpath,revision,binary=binary)
        else:
            f = codecs.open(path, "r", self.encoding)
            contents = f.read()
            f.close()
        return contents
    def set_file_contents(self, path, contents, allow_no_vcs=False, binary=False):
        """
        Set the file contents under version control.
        """
        add = not os.path.exists(path)
        if binary == False:
            f = codecs.open(path, "w", self.encoding)
        else:
            f = open(path, "wb")
        f.write(contents)
        f.close()
        
        if self._use_vcs(path, allow_no_vcs):
            if add:
                self.add(path)
            else:
                self.update(path)
    def mkdir(self, path, allow_no_vcs=False, check_parents=True):
        """
        Create (if neccessary) a directory at path under version
        control.
        """
        if check_parents == True:
            parent = os.path.dirname(path)
            if not os.path.exists(parent): # recurse through parents
                self.mkdir(parent, allow_no_vcs, check_parents)
        if not os.path.exists(path):
            os.mkdir(path)
            if self._use_vcs(path, allow_no_vcs):
                self.add(path)
        else:
            assert os.path.isdir(path)
            if self._use_vcs(path, allow_no_vcs):
                #self.update(path)# Don't update directories.  Changing files
                pass              # underneath them should be sufficient.
                
    def duplicate_repo(self, revision=None):
        """
        Get the repository as it was in a given revision.
        revision==None specifies the current revision.
        Return the path to the arbitrary directory at the base of the new repo.
        """
        # Dirname in Baseir to protect against simlink attacks.
        if self._duplicateBasedir == None:
            self._duplicateBasedir = tempfile.mkdtemp(prefix='BEvcs')
            self._duplicateDirname = \
                os.path.join(self._duplicateBasedir, "duplicate")
            self._vcs_duplicate_repo(directory=self._duplicateDirname,
                                     revision=revision)
        return self._duplicateDirname
    def remove_duplicate_repo(self):
        """
        Clean up a duplicate repo created with duplicate_repo().
        """
        if self._duplicateBasedir != None:
            shutil.rmtree(self._duplicateBasedir)
            self._duplicateBasedir = None
            self._duplicateDirname = None
    def commit(self, summary, body=None, allow_empty=False):
        """
        Commit the current working directory, with a commit message
        string summary and body.  Return the name of the old revision
        (or None if versioning is not supported).
        
        If allow_empty == False (the default), raise EmptyCommit if
        there are no changes to commit.
        """
        summary = summary.strip()+'\n'
        if body is not None:
            summary += '\n' + body.strip() + '\n'
        descriptor, filename = tempfile.mkstemp()
        revision = None
        try:
            temp_file = os.fdopen(descriptor, 'wb')
            temp_file.write(summary)
            temp_file.flush()
            self.precommit()
            revision = self._vcs_commit(filename, allow_empty=allow_empty)
            temp_file.close()
            self.postcommit()
        finally:
            os.remove(filename)
        return revision
    def precommit(self):
        """
        Executed before all attempted commits.
        """
        pass
    def postcommit(self):
        """
        Only executed after successful commits.
        """
        pass
    def revision_id(self, index=None):
        """
        Return the name of the <index>th revision.  The choice of
        which branch to follow when crossing branches/merges is not
        defined.

        Return None if index==None, revision IDs are not supported, or
        if the specified revision does not exist.
        """
        if index == None:
            return None
        return self._vcs_revision_id(index)
    def _u_any_in_string(self, list, string):
        """
        Return True if any of the strings in list are in string.
        Otherwise return False.
        """
        for list_string in list:
            if list_string in string:
                return True
        return False
    def _u_invoke(self, args, stdin=None, expect=(0,), cwd=None):
        """
        expect should be a tuple of allowed exit codes.  cwd should be
        the directory from which the command will be executed.
        """
        if cwd == None:
            cwd = self.rootdir
        if self.verboseInvoke == True:
            print >> sys.stderr, "%s$ %s" % (cwd, " ".join(args))
        try :
            if sys.platform != "win32":
                q = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE, cwd=cwd)
            else:
                # win32 don't have os.execvp() so have to run command in a shell
                q = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE, 
                          shell=True, cwd=cwd)
        except OSError, e :
            raise CommandError(args, status=e.args[0], stdout="", stderr=e)
        output,error = q.communicate(input=stdin)
        status = q.wait()
        if self.verboseInvoke == True:
            print >> sys.stderr, "%d\n%s%s" % (status, output, error)
        if status not in expect:
            raise CommandError(args, status, output, error)
        return status, output, error
    def _u_invoke_client(self, *args, **kwargs):
        directory = kwargs.get('directory',None)
        expect = kwargs.get('expect', (0,))
        stdin = kwargs.get('stdin', None)
        cl_args = [self.client]
        cl_args.extend(args)
        return self._u_invoke(cl_args, stdin=stdin,expect=expect,cwd=directory)
    def _u_search_parent_directories(self, path, filename):
        """
        Find the file (or directory) named filename in path or in any
        of path's parents.
        
        e.g.
          search_parent_directories("/a/b/c", ".be")
        will return the path to the first existing file from
          /a/b/c/.be
          /a/b/.be
          /a/.be
          /.be
        or None if none of those files exist.
        """
        return search_parent_directories(path, filename)
    def _use_vcs(self, path, allow_no_vcs):
        """
        Try and decide if _vcs_add/update/mkdir/etc calls will
        succeed.  Returns True is we think the vcs_call would
        succeeed, and False otherwise.
        """
        use_vcs = True
        exception = None
        if self.rootdir != None:
            if self.path_in_root(path) == False:
                use_vcs = False
                exception = PathNotInRoot(path, self.rootdir)
        else:
            use_vcs = False
            exception = VCSnotRooted
        if use_vcs == False and allow_no_vcs==False:
            raise exception
        return use_vcs
    def path_in_root(self, path, root=None):
        """
        Return the relative path to path from root.
        >>> vcs = new()
        >>> vcs.path_in_root("/a.b/c/.be", "/a.b/c")
        True
        >>> vcs.path_in_root("/a.b/.be", "/a.b/c")
        False
        """
        if root == None:
            if self.rootdir == None:
                raise VCSnotRooted
            root = self.rootdir
        path = os.path.abspath(path)
        absRoot = os.path.abspath(root)
        absRootSlashedDir = os.path.join(absRoot,"")
        if not path.startswith(absRootSlashedDir):
            return False
        return True
    def _u_rel_path(self, path, root=None):
        """
        Return the relative path to path from root.
        >>> vcs = new()
        >>> vcs._u_rel_path("/a.b/c/.be", "/a.b/c")
        '.be'
        """
        if root == None:
            if self.rootdir == None:
                raise VCSnotRooted
            root = self.rootdir
        path = os.path.abspath(path)
        absRoot = os.path.abspath(root)
        absRootSlashedDir = os.path.join(absRoot,"")
        if not path.startswith(absRootSlashedDir):
            raise PathNotInRoot(path, absRootSlashedDir)
        assert path != absRootSlashedDir, \
            "file %s == root directory %s" % (path, absRootSlashedDir)
        relpath = path[len(absRootSlashedDir):]
        return relpath
    def _u_abspath(self, path, root=None):
        """
        Return the absolute path from a path realtive to root.
        >>> vcs = new()
        >>> vcs._u_abspath(".be", "/a.b/c")
        '/a.b/c/.be'
        """
        if root == None:
            assert self.rootdir != None, "VCS not rooted"
            root = self.rootdir
        return os.path.abspath(os.path.join(root, path))
    def _u_create_id(self, name, email=None):
        """
        >>> vcs = new()
        >>> vcs._u_create_id("John Doe", "jdoe@example.com")
        'John Doe <jdoe@example.com>'
        >>> vcs._u_create_id("John Doe")
        'John Doe'
        """
        assert len(name) > 0
        if email == None or len(email) == 0:
            return name
        else:
            return "%s <%s>" % (name, email)
    def _u_parse_id(self, value):
        """
        >>> vcs = new()
        >>> vcs._u_parse_id("John Doe <jdoe@example.com>")
        ('John Doe', 'jdoe@example.com')
        >>> vcs._u_parse_id("John Doe")
        ('John Doe', None)
        >>> try:
        ...     vcs._u_parse_id("John Doe <jdoe@example.com><what?>")
        ... except AssertionError:
        ...     print "Invalid match"
        Invalid match
        """
        emailexp = re.compile("(.*) <([^>]*)>(.*)")
        match = emailexp.search(value)
        if match == None:
            email = None
            name = value
        else:
            assert len(match.groups()) == 3
            assert match.groups()[2] == "", match.groups()
            email = match.groups()[1]
            name = match.groups()[0]
        assert name != None
        assert len(name) > 0
        return (name, email)
    def _u_get_fallback_username(self):
        name = None
        for envariable in ["LOGNAME", "USERNAME"]:
            if os.environ.has_key(envariable):
                name = os.environ[envariable]
                break
        assert name != None
        return name
    def _u_get_fallback_email(self):
        hostname = gethostname()
        name = self._u_get_fallback_username()
        return "%s@%s" % (name, hostname)
    def _u_parse_commitfile(self, commitfile):
        """
        Split the commitfile created in self.commit() back into
        summary and header lines.
        """
        f = codecs.open(commitfile, "r", self.encoding)
        summary = f.readline()
        body = f.read()
        body.lstrip('\n')
        if len(body) == 0:
            body = None
        f.close()
        return (summary, body)
        

def setup_vcs_test_fixtures(testcase):
    """Set up test fixtures for VCS test case."""
    testcase.vcs = testcase.Class()
    testcase.dir = Dir()
    testcase.dirname = testcase.dir.path

    vcs_not_supporting_uninitialized_user_id = []
    vcs_not_supporting_set_user_id = ["None", "hg"]
    testcase.vcs_supports_uninitialized_user_id = (
        testcase.vcs.name not in vcs_not_supporting_uninitialized_user_id)
    testcase.vcs_supports_set_user_id = (
        testcase.vcs.name not in vcs_not_supporting_set_user_id)

    if not testcase.vcs.installed():
        testcase.fail(
            "%(name)s VCS not found" % vars(testcase.Class))

    if testcase.Class.name != "None":
        testcase.failIf(
            testcase.vcs.detect(testcase.dirname),
            "Detected %(name)s VCS before initialising"
                % vars(testcase.Class))

    testcase.vcs.init(testcase.dirname)


class VCSTestCase(unittest.TestCase):
    """Test cases for base VCS class."""

    Class = VCS

    def __init__(self, *args, **kwargs):
        super(VCSTestCase, self).__init__(*args, **kwargs)
        self.dirname = None

    def setUp(self):
        super(VCSTestCase, self).setUp()
        setup_vcs_test_fixtures(self)

    def tearDown(self):
        del(self.vcs)
        super(VCSTestCase, self).tearDown()

    def full_path(self, rel_path):
        return os.path.join(self.dirname, rel_path)


class VCS_init_TestCase(VCSTestCase):
    """Test cases for VCS.init method."""

    def test_detect_should_succeed_after_init(self):
        """Should detect VCS in directory after initialization."""
        self.failUnless(
            self.vcs.detect(self.dirname),
            "Did not detect %(name)s VCS after initialising"
                % vars(self.Class))

    def test_vcs_rootdir_in_specified_root_path(self):
        """VCS root directory should be in specified root path."""
        rp = os.path.realpath(self.vcs.rootdir)
        dp = os.path.realpath(self.dirname)
        vcs_name = self.Class.name
        self.failUnless(
            dp == rp or rp == None,
            "%(vcs_name)s VCS root in wrong dir (%(dp)s %(rp)s)" % vars())


class VCS_get_user_id_TestCase(VCSTestCase):
    """Test cases for VCS.get_user_id method."""

    def test_gets_existing_user_id(self):
        """Should get the existing user ID."""
        if not self.vcs_supports_uninitialized_user_id:
            return

        user_id = self.vcs.get_user_id()
        self.failUnless(
            user_id is not None,
            "unable to get a user id")


class VCS_set_user_id_TestCase(VCSTestCase):
    """Test cases for VCS.set_user_id method."""

    def setUp(self):
        super(VCS_set_user_id_TestCase, self).setUp()

        if self.vcs_supports_uninitialized_user_id:
            self.prev_user_id = self.vcs.get_user_id()
        else:
            self.prev_user_id = "Uninitialized identity <bogus@example.org>"

        if self.vcs_supports_set_user_id:
            self.test_new_user_id = "John Doe <jdoe@example.com>"
            self.vcs.set_user_id(self.test_new_user_id)

    def tearDown(self):
        if self.vcs_supports_set_user_id:
            self.vcs.set_user_id(self.prev_user_id)
        super(VCS_set_user_id_TestCase, self).tearDown()

    def test_raises_error_in_unsupported_vcs(self):
        """Should raise an error in a VCS that doesn't support it."""
        if self.vcs_supports_set_user_id:
            return
        self.assertRaises(
            SettingIDnotSupported,
            self.vcs.set_user_id, "foo")

    def test_updates_user_id_in_supporting_vcs(self):
        """Should update the user ID in an VCS that supports it."""
        if not self.vcs_supports_set_user_id:
            return
        user_id = self.vcs.get_user_id()
        self.failUnlessEqual(
            self.test_new_user_id, user_id,
            "user id not set correctly (expected %s, got %s)"
                % (self.test_new_user_id, user_id))


def setup_vcs_revision_test_fixtures(testcase):
    """Set up revision test fixtures for VCS test case."""
    testcase.test_dirs = ['a', 'a/b', 'c']
    for path in testcase.test_dirs:
        testcase.vcs.mkdir(testcase.full_path(path))

    testcase.test_files = ['a/text', 'a/b/text']

    testcase.test_contents = {
        'rev_1': "Lorem ipsum",
        'uncommitted': "dolor sit amet",
        }


class VCS_mkdir_TestCase(VCSTestCase):
    """Test cases for VCS.mkdir method."""

    def setUp(self):
        super(VCS_mkdir_TestCase, self).setUp()
        setup_vcs_revision_test_fixtures(self)

    def tearDown(self):
        for path in reversed(sorted(self.test_dirs)):
            self.vcs.recursive_remove(self.full_path(path))
        super(VCS_mkdir_TestCase, self).tearDown()

    def test_mkdir_creates_directory(self):
        """Should create specified directory in filesystem."""
        for path in self.test_dirs:
            full_path = self.full_path(path)
            self.failUnless(
                os.path.exists(full_path),
                "path %(full_path)s does not exist" % vars())


class VCS_commit_TestCase(VCSTestCase):
    """Test cases for VCS.commit method."""

    def setUp(self):
        super(VCS_commit_TestCase, self).setUp()
        setup_vcs_revision_test_fixtures(self)

    def tearDown(self):
        for path in reversed(sorted(self.test_dirs)):
            self.vcs.recursive_remove(self.full_path(path))
        super(VCS_commit_TestCase, self).tearDown()

    def test_file_contents_as_specified(self):
        """Should set file contents as specified."""
        test_contents = self.test_contents['rev_1']
        for path in self.test_files:
            full_path = self.full_path(path)
            self.vcs.set_file_contents(full_path, test_contents)
            current_contents = self.vcs.get_file_contents(full_path)
            self.failUnlessEqual(test_contents, current_contents)

    def test_file_contents_as_committed(self):
        """Should have file contents as specified after commit."""
        test_contents = self.test_contents['rev_1']
        for path in self.test_files:
            full_path = self.full_path(path)
            self.vcs.set_file_contents(full_path, test_contents)
            revision = self.vcs.commit("Initial file contents.")
            current_contents = self.vcs.get_file_contents(full_path)
            self.failUnlessEqual(test_contents, current_contents)

    def test_file_contents_as_set_when_uncommitted(self):
        """Should set file contents as specified after commit."""
        if not self.vcs.versioned:
            return
        for path in self.test_files:
            full_path = self.full_path(path)
            self.vcs.set_file_contents(
                full_path, self.test_contents['rev_1'])
            revision = self.vcs.commit("Initial file contents.")
            self.vcs.set_file_contents(
                full_path, self.test_contents['uncommitted'])
            current_contents = self.vcs.get_file_contents(full_path)
            self.failUnlessEqual(
                self.test_contents['uncommitted'], current_contents)

    def test_revision_file_contents_as_committed(self):
        """Should get file contents as committed to specified revision."""
        if not self.vcs.versioned:
            return
        for path in self.test_files:
            full_path = self.full_path(path)
            self.vcs.set_file_contents(
                full_path, self.test_contents['rev_1'])
            revision = self.vcs.commit("Initial file contents.")
            self.vcs.set_file_contents(
                full_path, self.test_contents['uncommitted'])
            committed_contents = self.vcs.get_file_contents(
                full_path, revision)
            self.failUnlessEqual(
                self.test_contents['rev_1'], committed_contents)

    def test_revision_id_as_committed(self):
        """Check for compatibility between .commit() and .revision_id()"""
        if not self.vcs.versioned:
            self.failUnlessEqual(self.vcs.revision_id(5), None)
            return
        committed_revisions = []
        for path in self.test_files:
            full_path = self.full_path(path)
            self.vcs.set_file_contents(
                full_path, self.test_contents['rev_1'])
            revision = self.vcs.commit("Initial %s contents." % path)
            committed_revisions.append(revision)
            self.vcs.set_file_contents(
                full_path, self.test_contents['uncommitted'])
            revision = self.vcs.commit("Altered %s contents." % path)
            committed_revisions.append(revision)
        for i,revision in enumerate(committed_revisions):
            self.failUnlessEqual(self.vcs.revision_id(i), revision)
            i += -len(committed_revisions) # check negative indices
            self.failUnlessEqual(self.vcs.revision_id(i), revision)
        i = len(committed_revisions)
        self.failUnlessEqual(self.vcs.revision_id(i), None)
        self.failUnlessEqual(self.vcs.revision_id(-i-1), None)

    def test_revision_id_as_committed(self):
        """Check revision id before first commit"""
        if not self.vcs.versioned:
            self.failUnlessEqual(self.vcs.revision_id(5), None)
            return
        committed_revisions = []
        for path in self.test_files:
            self.failUnlessEqual(self.vcs.revision_id(0), None)


class VCS_duplicate_repo_TestCase(VCSTestCase):
    """Test cases for VCS.duplicate_repo method."""

    def setUp(self):
        super(VCS_duplicate_repo_TestCase, self).setUp()
        setup_vcs_revision_test_fixtures(self)

    def tearDown(self):
        self.vcs.remove_duplicate_repo()
        for path in reversed(sorted(self.test_dirs)):
            self.vcs.recursive_remove(self.full_path(path))
        super(VCS_duplicate_repo_TestCase, self).tearDown()

    def test_revision_file_contents_as_committed(self):
        """Should match file contents as committed to specified revision."""
        if not self.vcs.versioned:
            return
        for path in self.test_files:
            full_path = self.full_path(path)
            self.vcs.set_file_contents(
                full_path, self.test_contents['rev_1'])
            revision = self.vcs.commit("Commit current status")
            self.vcs.set_file_contents(
                full_path, self.test_contents['uncommitted'])
            dup_repo_path = self.vcs.duplicate_repo(revision)
            dup_file_path = os.path.join(dup_repo_path, path)
            dup_file_contents = file(dup_file_path, 'rb').read()
            self.failUnlessEqual(
                self.test_contents['rev_1'], dup_file_contents)
            self.vcs.remove_duplicate_repo()


def make_vcs_testcase_subclasses(vcs_class, namespace):
    """Make VCSTestCase subclasses for vcs_class in the namespace."""
    vcs_testcase_classes = [
        c for c in (
            ob for ob in globals().values() if isinstance(ob, type))
        if issubclass(c, VCSTestCase)]

    for base_class in vcs_testcase_classes:
        testcase_class_name = vcs_class.__name__ + base_class.__name__
        testcase_class_bases = (base_class,)
        testcase_class_dict = dict(base_class.__dict__)
        testcase_class_dict['Class'] = vcs_class
        testcase_class = type(
            testcase_class_name, testcase_class_bases, testcase_class_dict)
        setattr(namespace, testcase_class_name, testcase_class)


unitsuite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
suite = unittest.TestSuite([unitsuite, doctest.DocTestSuite()])