File: versioneer.py

package info (click to toggle)
matplotlib 3.0.2-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 77,480 kB
  • sloc: python: 124,525; cpp: 58,549; ansic: 29,599; objc: 2,348; makefile: 148; sh: 57
file content (1704 lines) | stat: -rw-r--r-- 62,731 bytes parent folder | download | duplicates (3)
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
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704

# Version: 0.15 +matplotlib modifications to avoid the need for setup.cfg to exist.

"""
The Versioneer
==============

* like a rocketeer, but for versions!
* https://github.com/warner/python-versioneer
* Brian Warner
* License: Public Domain
* Compatible With: python2.6, 2.7, 3.2, 3.3, 3.4, and pypy
* [![Latest Version]
(https://pypip.in/version/versioneer/badge.svg?style=flat)
](https://pypi.python.org/pypi/versioneer/)
* [![Build Status]
(https://travis-ci.org/warner/python-versioneer.png?branch=master)
](https://travis-ci.org/warner/python-versioneer)

This is a tool for managing a recorded version number in distutils-based
python projects. The goal is to remove the tedious and error-prone "update
the embedded version string" step from your release process. Making a new
release should be as easy as recording a new tag in your version-control
system, and maybe making new tarballs.


## Quick Install

* `pip install versioneer` to somewhere to your $PATH
* add a `[versioneer]` section to your setup.cfg (see below)
* run `versioneer install` in your source tree, commit the results

## Version Identifiers

Source trees come from a variety of places:

* a version-control system checkout (mostly used by developers)
* a nightly tarball, produced by build automation
* a snapshot tarball, produced by a web-based VCS browser, like github's
  "tarball from tag" feature
* a release tarball, produced by "setup.py sdist", distributed through PyPI

Within each source tree, the version identifier (either a string or a number,
this tool is format-agnostic) can come from a variety of places:

* ask the VCS tool itself, e.g. "git describe" (for checkouts), which knows
  about recent "tags" and an absolute revision-id
* the name of the directory into which the tarball was unpacked
* an expanded VCS keyword ($Id$, etc)
* a `_version.py` created by some earlier build step

For released software, the version identifier is closely related to a VCS
tag. Some projects use tag names that include more than just the version
string (e.g. "myproject-1.2" instead of just "1.2"), in which case the tool
needs to strip the tag prefix to extract the version identifier. For
unreleased software (between tags), the version identifier should provide
enough information to help developers recreate the same tree, while also
giving them an idea of roughly how old the tree is (after version 1.2, before
version 1.3). Many VCS systems can report a description that captures this,
for example `git describe --tags --dirty --always` reports things like
"0.7-1-g574ab98-dirty" to indicate that the checkout is one revision past the
0.7 tag, has a unique revision id of "574ab98", and is "dirty" (it has
uncommitted changes.

The version identifier is used for multiple purposes:

* to allow the module to self-identify its version: `myproject.__version__`
* to choose a name and prefix for a 'setup.py sdist' tarball

## Theory of Operation

Versioneer works by adding a special `_version.py` file into your source
tree, where your `__init__.py` can import it. This `_version.py` knows how to
dynamically ask the VCS tool for version information at import time.

`_version.py` also contains `$Revision$` markers, and the installation
process marks `_version.py` to have this marker rewritten with a tag name
during the `git archive` command. As a result, generated tarballs will
contain enough information to get the proper version.

To allow `setup.py` to compute a version too, a `versioneer.py` is added to
the top level of your source tree, next to `setup.py` and the `setup.cfg`
that configures it. This overrides several distutils/setuptools commands to
compute the version when invoked, and changes `setup.py build` and `setup.py
sdist` to replace `_version.py` with a small static file that contains just
the generated version data.

## Installation

First, decide on values for the following configuration variables:

* `VCS`: the version control system you use. Currently accepts "git".

* `style`: the style of version string to be produced. See "Styles" below for
  details. Defaults to "pep440", which looks like
  `TAG[+DISTANCE.gSHORTHASH[.dirty]]`.

* `versionfile_source`:

  A project-relative pathname into which the generated version strings should
  be written. This is usually a `_version.py` next to your project's main
  `__init__.py` file, so it can be imported at runtime. If your project uses
  `src/myproject/__init__.py`, this should be `src/myproject/_version.py`.
  This file should be checked in to your VCS as usual: the copy created below
  by `setup.py setup_versioneer` will include code that parses expanded VCS
  keywords in generated tarballs. The 'build' and 'sdist' commands will
  replace it with a copy that has just the calculated version string.

  This must be set even if your project does not have any modules (and will
  therefore never import `_version.py`), since "setup.py sdist" -based trees
  still need somewhere to record the pre-calculated version strings. Anywhere
  in the source tree should do. If there is a `__init__.py` next to your
  `_version.py`, the `setup.py setup_versioneer` command (described below)
  will append some `__version__`-setting assignments, if they aren't already
  present.

* `versionfile_build`:

  Like `versionfile_source`, but relative to the build directory instead of
  the source directory. These will differ when your setup.py uses
  'package_dir='. If you have `package_dir={'myproject': 'src/myproject'}`,
  then you will probably have `versionfile_build='myproject/_version.py'` and
  `versionfile_source='src/myproject/_version.py'`.

  If this is set to None, then `setup.py build` will not attempt to rewrite
  any `_version.py` in the built tree. If your project does not have any
  libraries (e.g. if it only builds a script), then you should use
  `versionfile_build = None` and override `distutils.command.build_scripts`
  to explicitly insert a copy of `versioneer.get_version()` into your
  generated script.

* `tag_prefix`:

  a string, like 'PROJECTNAME-', which appears at the start of all VCS tags.
  If your tags look like 'myproject-1.2.0', then you should use
  tag_prefix='myproject-'. If you use unprefixed tags like '1.2.0', this
  should be an empty string.

* `parentdir_prefix`:

  a optional string, frequently the same as tag_prefix, which appears at the
  start of all unpacked tarball filenames. If your tarball unpacks into
  'myproject-1.2.0', this should be 'myproject-'. To disable this feature,
  just omit the field from your `setup.cfg`.

This tool provides one script, named `versioneer`. That script has one mode,
"install", which writes a copy of `versioneer.py` into the current directory
and runs `versioneer.py setup` to finish the installation.

To versioneer-enable your project:

* 1: Modify your `setup.cfg`, adding a section named `[versioneer]` and
  populating it with the configuration values you decided earlier (note that
  the option names are not case-sensitive):

  ````
  [versioneer]
  VCS = git
  style = pep440
  versionfile_source = src/myproject/_version.py
  versionfile_build = myproject/_version.py
  tag_prefix = ""
  parentdir_prefix = myproject-
  ````

* 2: Run `versioneer install`. This will do the following:

  * copy `versioneer.py` into the top of your source tree
  * create `_version.py` in the right place (`versionfile_source`)
  * modify your `__init__.py` (if one exists next to `_version.py`) to define
    `__version__` (by calling a function from `_version.py`)
  * modify your `MANIFEST.in` to include both `versioneer.py` and the
    generated `_version.py` in sdist tarballs

  `versioneer install` will complain about any problems it finds with your
  `setup.py` or `setup.cfg`. Run it multiple times until you have fixed all
  the problems.

* 3: add a `import versioneer` to your setup.py, and add the following
  arguments to the setup() call:

        version=versioneer.get_version(),
        cmdclass=versioneer.get_cmdclass(),

* 4: commit these changes to your VCS. To make sure you won't forget,
  `versioneer install` will mark everything it touched for addition using
  `git add`. Don't forget to add `setup.py` and `setup.cfg` too.

## Post-Installation Usage

Once established, all uses of your tree from a VCS checkout should get the
current version string. All generated tarballs should include an embedded
version string (so users who unpack them will not need a VCS tool installed).

If you distribute your project through PyPI, then the release process should
boil down to two steps:

* 1: git tag 1.0
* 2: python setup.py register sdist upload

If you distribute it through github (i.e. users use github to generate
tarballs with `git archive`), the process is:

* 1: git tag 1.0
* 2: git push; git push --tags

Versioneer will report "0+untagged.NUMCOMMITS.gHASH" until your tree has at
least one tag in its history.

## Version-String Flavors

Code which uses Versioneer can learn about its version string at runtime by
importing `_version` from your main `__init__.py` file and running the
`get_versions()` function. From the "outside" (e.g. in `setup.py`), you can
import the top-level `versioneer.py` and run `get_versions()`.

Both functions return a dictionary with different flavors of version
information:

* `['version']`: A condensed version string, rendered using the selected
  style. This is the most commonly used value for the project's version
  string. The default "pep440" style yields strings like `0.11`,
  `0.11+2.g1076c97`, or `0.11+2.g1076c97.dirty`. See the "Styles" section
  below for alternative styles.

* `['full-revisionid']`: detailed revision identifier. For Git, this is the
  full SHA1 commit id, e.g. "1076c978a8d3cfc70f408fe5974aa6c092c949ac".

* `['dirty']`: a boolean, True if the tree has uncommitted changes. Note that
  this is only accurate if run in a VCS checkout, otherwise it is likely to
  be False or None

* `['error']`: if the version string could not be computed, this will be set
  to a string describing the problem, otherwise it will be None. It may be
  useful to throw an exception in setup.py if this is set, to avoid e.g.
  creating tarballs with a version string of "unknown".

Some variants are more useful than others. Including `full-revisionid` in a
bug report should allow developers to reconstruct the exact code being tested
(or indicate the presence of local changes that should be shared with the
developers). `version` is suitable for display in an "about" box or a CLI
`--version` output: it can be easily compared against release notes and lists
of bugs fixed in various releases.

The installer adds the following text to your `__init__.py` to place a basic
version in `YOURPROJECT.__version__`:

    from ._version import get_versions
    __version__ = get_versions()['version']
    del get_versions

## Styles

The setup.cfg `style=` configuration controls how the VCS information is
rendered into a version string.

The default style, "pep440", produces a PEP440-compliant string, equal to the
un-prefixed tag name for actual releases, and containing an additional "local
version" section with more detail for in-between builds. For Git, this is
TAG[+DISTANCE.gHEX[.dirty]] , using information from `git describe --tags
--dirty --always`. For example "0.11+2.g1076c97.dirty" indicates that the
tree is like the "1076c97" commit but has uncommitted changes (".dirty"), and
that this commit is two revisions ("+2") beyond the "0.11" tag. For released
software (exactly equal to a known tag), the identifier will only contain the
stripped tag, e.g. "0.11".

Other styles are available. See details.md in the Versioneer source tree for
descriptions.

## Debugging

Versioneer tries to avoid fatal errors: if something goes wrong, it will tend
to return a version of "0+unknown". To investigate the problem, run `setup.py
version`, which will run the version-lookup code in a verbose mode, and will
display the full contents of `get_versions()` (including the `error` string,
which may help identify what went wrong).

## Updating Versioneer

To upgrade your project to a new release of Versioneer, do the following:

* install the new Versioneer (`pip install -U versioneer` or equivalent)
* edit `setup.cfg`, if necessary, to include any new configuration settings
  indicated by the release notes
* re-run `versioneer install` in your source tree, to replace
  `SRC/_version.py`
* commit any changed files

### Upgrading to 0.15

Starting with this version, Versioneer is configured with a `[versioneer]`
section in your `setup.cfg` file. Earlier versions required the `setup.py` to
set attributes on the `versioneer` module immediately after import. The new
version will refuse to run (raising an exception during import) until you
have provided the necessary `setup.cfg` section.

In addition, the Versioneer package provides an executable named
`versioneer`, and the installation process is driven by running `versioneer
install`. In 0.14 and earlier, the executable was named
`versioneer-installer` and was run without an argument.

### Upgrading to 0.14

0.14 changes the format of the version string. 0.13 and earlier used
hyphen-separated strings like "0.11-2-g1076c97-dirty". 0.14 and beyond use a
plus-separated "local version" section strings, with dot-separated
components, like "0.11+2.g1076c97". PEP440-strict tools did not like the old
format, but should be ok with the new one.

### Upgrading from 0.11 to 0.12

Nothing special.

### Upgrading from 0.10 to 0.11

You must add a `versioneer.VCS = "git"` to your `setup.py` before re-running
`setup.py setup_versioneer`. This will enable the use of additional
version-control systems (SVN, etc) in the future.

## Future Directions

This tool is designed to make it easily extended to other version-control
systems: all VCS-specific components are in separate directories like
src/git/ . The top-level `versioneer.py` script is assembled from these
components by running make-versioneer.py . In the future, make-versioneer.py
will take a VCS name as an argument, and will construct a version of
`versioneer.py` that is specific to the given VCS. It might also take the
configuration arguments that are currently provided manually during
installation by editing setup.py . Alternatively, it might go the other
direction and include code from all supported VCS systems, reducing the
number of intermediate scripts.


## License

To make Versioneer easier to embed, all its code is hereby released into the
public domain. The `_version.py` that it creates is also in the public
domain.

"""

from __future__ import print_function
try:
    import configparser
except ImportError:
    import ConfigParser as configparser
import errno
import json
import os
import re
import subprocess
import sys


class VersioneerConfig:
    pass


def get_root():
    # we require that all commands are run from the project root, i.e. the
    # directory that contains setup.py, setup.cfg, and versioneer.py .
    root = os.path.realpath(os.path.abspath(os.getcwd()))
    setup_py = os.path.join(root, "setup.py")
    versioneer_py = os.path.join(root, "versioneer.py")
    if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
        # allow 'python path/to/setup.py COMMAND'
        root = os.path.dirname(os.path.realpath(os.path.abspath(sys.argv[0])))
        setup_py = os.path.join(root, "setup.py")
        versioneer_py = os.path.join(root, "versioneer.py")
    if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
        err = ("Versioneer was unable to run the project root directory. "
               "Versioneer requires setup.py to be executed from "
               "its immediate directory (like 'python setup.py COMMAND'), "
               "or in a way that lets it use sys.argv[0] to find the root "
               "(like 'python path/to/setup.py COMMAND').")
        raise VersioneerBadRootError(err)
    try:
        # Certain runtime workflows (setup.py install/develop in a setuptools
        # tree) execute all dependencies in a single python process, so
        # "versioneer" may be imported multiple times, and python's shared
        # module-import table will cache the first one. So we can't use
        # os.path.dirname(__file__), as that will find whichever
        # versioneer.py was first imported, even in later projects.
        me = os.path.realpath(os.path.abspath(__file__))
        if os.path.splitext(me)[0] != os.path.splitext(versioneer_py)[0]:
            print("Warning: build in %s is using versioneer.py from %s"
                  % (os.path.dirname(me), versioneer_py))
    except NameError:
        pass
    return root


def get_config_from_root(root):
    # This might raise EnvironmentError (if setup.cfg is missing), or
    # configparser.NoSectionError (if it lacks a [versioneer] section), or
    # configparser.NoOptionError (if it lacks "VCS="). See the docstring at
    # the top of versioneer.py for instructions on writing your setup.cfg .
    setup_cfg = os.path.join(root, "setup.cfg")


    parser = configparser.SafeConfigParser()
    if os.path.exists(setup_cfg):
        with open(setup_cfg, "r") as f:
            parser.readfp(f)

    def get(parser, name):
        if parser.has_option("versioneer", name):
            return parser.get("versioneer", name)
        return None
    cfg = VersioneerConfig()

    VCS = get(parser, "VCS") or 'git'
    cfg.VCS = VCS
    cfg.style = get(parser, "style") or "pep440"
    version_file =  os.path.join('lib', 'matplotlib', '_version.py')
    cfg.versionfile_source = get(parser, "versionfile_source") or version_file
    cfg.versionfile_build = get(parser, "versionfile_build") or os.path.join('matplotlib', '_version.py')
    cfg.tag_prefix = get(parser, "tag_prefix") or 'v'
    cfg.parentdir_prefix = get(parser, "parentdir_prefix") or 'matplotlib-'
    cfg.verbose = get(parser, "verbose")
    return cfg


class NotThisMethod(Exception):
    pass

# these dictionaries contain VCS-specific tools
LONG_VERSION_PY = {}
HANDLERS = {}


def register_vcs_handler(vcs, method):  # decorator
    def decorate(f):
        if vcs not in HANDLERS:
            HANDLERS[vcs] = {}
        HANDLERS[vcs][method] = f
        return f
    return decorate


def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen([c] + args, cwd=cwd, stdout=subprocess.PIPE,
                                 stderr=(subprocess.PIPE if hide_stderr
                                         else None))
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %s" % dispcmd)
                print(e)
            return None
    else:
        if verbose:
            print("unable to find command, tried %s" % (commands,))
        return None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %s (error)" % dispcmd)
        return None
    return stdout
LONG_VERSION_PY['git'] = r'''
# This file helps to compute a version number in source trees obtained from
# git-archive tarball (such as those provided by githubs download-from-tag
# feature). Distribution tarballs (built by setup.py sdist) and build
# directories (produced by setup.py build) will contain a much shorter file
# that just contains the computed version number.

# This file is released into the public domain. Generated by
# versioneer-0.15 (https://github.com/warner/python-versioneer)

import errno
import os
import re
import subprocess
import sys


def get_keywords():
    # these strings will be replaced by git during git-archive.
    # setup.py/versioneer.py will grep for the variable names, so they must
    # each be defined on a line of their own. _version.py will just call
    # get_keywords().
    git_refnames = "%(DOLLAR)sFormat:%%d%(DOLLAR)s"
    git_full = "%(DOLLAR)sFormat:%%H%(DOLLAR)s"
    keywords = {"refnames": git_refnames, "full": git_full}
    return keywords


class VersioneerConfig:
    pass


def get_config():
    # these strings are filled in when 'setup.py versioneer' creates
    # _version.py
    cfg = VersioneerConfig()
    cfg.VCS = "git"
    cfg.style = "%(STYLE)s"
    cfg.tag_prefix = "%(TAG_PREFIX)s"
    cfg.parentdir_prefix = "%(PARENTDIR_PREFIX)s"
    cfg.versionfile_source = "%(VERSIONFILE_SOURCE)s"
    cfg.verbose = False
    return cfg


class NotThisMethod(Exception):
    pass


LONG_VERSION_PY = {}
HANDLERS = {}


def register_vcs_handler(vcs, method):  # decorator
    def decorate(f):
        if vcs not in HANDLERS:
            HANDLERS[vcs] = {}
        HANDLERS[vcs][method] = f
        return f
    return decorate


def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen([c] + args, cwd=cwd, stdout=subprocess.PIPE,
                                 stderr=(subprocess.PIPE if hide_stderr
                                         else None))
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %%s" %% dispcmd)
                print(e)
            return None
    else:
        if verbose:
            print("unable to find command, tried %%s" %% (commands,))
        return None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %%s (error)" %% dispcmd)
        return None
    return stdout


def versions_from_parentdir(parentdir_prefix, root, verbose):
    # Source tarballs conventionally unpack into a directory that includes
    # both the project name and a version string.
    dirname = os.path.basename(root)
    if not dirname.startswith(parentdir_prefix):
        if verbose:
            print("guessing rootdir is '%%s', but '%%s' doesn't start with "
                  "prefix '%%s'" %% (root, dirname, parentdir_prefix))
        raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
    return {"version": dirname[len(parentdir_prefix):],
            "full-revisionid": None,
            "dirty": False, "error": None}


@register_vcs_handler("git", "get_keywords")
def git_get_keywords(versionfile_abs):
    # the code embedded in _version.py can just fetch the value of these
    # keywords. When used from setup.py, we don't want to import _version.py,
    # so we do it with a regexp instead. This function is not used from
    # _version.py.
    keywords = {}
    try:
        f = open(versionfile_abs, "r")
        for line in f.readlines():
            if line.strip().startswith("git_refnames ="):
                mo = re.search(r'=\s*"(.*)"', line)
                if mo:
                    keywords["refnames"] = mo.group(1)
            if line.strip().startswith("git_full ="):
                mo = re.search(r'=\s*"(.*)"', line)
                if mo:
                    keywords["full"] = mo.group(1)
        f.close()
    except EnvironmentError:
        pass
    return keywords


@register_vcs_handler("git", "keywords")
def git_versions_from_keywords(keywords, tag_prefix, verbose):
    if not keywords:
        raise NotThisMethod("no keywords at all, weird")
    refnames = keywords["refnames"].strip()
    if refnames.startswith("$Format"):
        if verbose:
            print("keywords are unexpanded, not using")
        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
    refs = set([r.strip() for r in refnames.strip("()").split(",")])
    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
    TAG = "tag: "
    tags = set([r[len(TAG):] for r in refs if r.startswith(TAG)])
    if not tags:
        # Either we're using git < 1.8.3, or there really are no tags. We use
        # a heuristic: assume all version tags have a digit. The old git %%d
        # expansion behaves like git log --decorate=short and strips out the
        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
        # between branches and tags. By ignoring refnames without digits, we
        # filter out many common branch names like "release" and
        # "stabilization", as well as "HEAD" and "master".
        tags = set([r for r in refs if re.search(r'\d', r)])
        if verbose:
            print("discarding '%%s', no digits" %% ",".join(refs-tags))
    if verbose:
        print("likely tags: %%s" %% ",".join(sorted(tags)))
    for ref in sorted(tags):
        # sorting will prefer e.g. "2.0" over "2.0rc1"
        if ref.startswith(tag_prefix):
            r = ref[len(tag_prefix):]
            if verbose:
                print("picking %%s" %% r)
            return {"version": r,
                    "full-revisionid": keywords["full"].strip(),
                    "dirty": False, "error": None
                    }
    # no suitable tags, so version is "0+unknown", but full hex is still there
    if verbose:
        print("no suitable tags, using unknown + full revision id")
    return {"version": "0+unknown",
            "full-revisionid": keywords["full"].strip(),
            "dirty": False, "error": "no suitable tags"}


@register_vcs_handler("git", "pieces_from_vcs")
def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
    # this runs 'git' from the root of the source tree. This only gets called
    # if the git-archive 'subst' keywords were *not* expanded, and
    # _version.py hasn't already been rewritten with a short version string,
    # meaning we're inside a checked out source tree.

    if not os.path.exists(os.path.join(root, ".git")):
        if verbose:
            print("no .git in %%s" %% root)
        raise NotThisMethod("no .git directory")

    GITS = ["git"]
    if sys.platform == "win32":
        GITS = ["git.cmd", "git.exe"]
    # if there is a tag, this yields TAG-NUM-gHEX[-dirty]
    # if there are no tags, this yields HEX[-dirty] (no NUM)
    describe_out = run_command(GITS, ["describe", "--tags", "--dirty",
                                      "--always", "--long"],
                               cwd=root)
    # --long was added in git-1.5.5
    if describe_out is None:
        raise NotThisMethod("'git describe' failed")
    describe_out = describe_out.strip()
    full_out = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
    if full_out is None:
        raise NotThisMethod("'git rev-parse' failed")
    full_out = full_out.strip()

    pieces = {}
    pieces["long"] = full_out
    pieces["short"] = full_out[:7]  # maybe improved later
    pieces["error"] = None

    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
    # TAG might have hyphens.
    git_describe = describe_out

    # look for -dirty suffix
    dirty = git_describe.endswith("-dirty")
    pieces["dirty"] = dirty
    if dirty:
        git_describe = git_describe[:git_describe.rindex("-dirty")]

    # now we have TAG-NUM-gHEX or HEX

    if "-" in git_describe:
        # TAG-NUM-gHEX
        mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
        if not mo:
            # unparseable. Maybe git-describe is misbehaving?
            pieces["error"] = ("unable to parse git-describe output: '%%s'"
                               %% describe_out)
            return pieces

        # tag
        full_tag = mo.group(1)
        if not full_tag.startswith(tag_prefix):
            if verbose:
                fmt = "tag '%%s' doesn't start with prefix '%%s'"
                print(fmt %% (full_tag, tag_prefix))
            pieces["error"] = ("tag '%%s' doesn't start with prefix '%%s'"
                               %% (full_tag, tag_prefix))
            return pieces
        pieces["closest-tag"] = full_tag[len(tag_prefix):]

        # distance: number of commits since tag
        pieces["distance"] = int(mo.group(2))

        # commit: short hex revision ID
        pieces["short"] = mo.group(3)

    else:
        # HEX: no tags
        pieces["closest-tag"] = None
        count_out = run_command(GITS, ["rev-list", "HEAD", "--count"],
                                cwd=root)
        pieces["distance"] = int(count_out)  # total number of commits

    return pieces


def plus_or_dot(pieces):
    if "+" in pieces.get("closest-tag", ""):
        return "."
    return "+"


def render_pep440(pieces):
    # now build up version string, with post-release "local version
    # identifier". Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
    # get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty

    # exceptions:
    # 1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"] or pieces["dirty"]:
            rendered += plus_or_dot(pieces)
            rendered += "%%d.g%%s" %% (pieces["distance"], pieces["short"])
            if pieces["dirty"]:
                rendered += ".dirty"
    else:
        # exception #1
        rendered = "0+untagged.%%d.g%%s" %% (pieces["distance"],
                                          pieces["short"])
        if pieces["dirty"]:
            rendered += ".dirty"
    return rendered


def render_pep440_pre(pieces):
    # TAG[.post.devDISTANCE] . No -dirty

    # exceptions:
    # 1: no tags. 0.post.devDISTANCE

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"]:
            rendered += ".post.dev%%d" %% pieces["distance"]
    else:
        # exception #1
        rendered = "0.post.dev%%d" %% pieces["distance"]
    return rendered


def render_pep440_post(pieces):
    # TAG[.postDISTANCE[.dev0]+gHEX] . The ".dev0" means dirty. Note that
    # .dev0 sorts backwards (a dirty tree will appear "older" than the
    # corresponding clean one), but you shouldn't be releasing software with
    # -dirty anyways.

    # exceptions:
    # 1: no tags. 0.postDISTANCE[.dev0]

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"] or pieces["dirty"]:
            rendered += ".post%%d" %% pieces["distance"]
            if pieces["dirty"]:
                rendered += ".dev0"
            rendered += plus_or_dot(pieces)
            rendered += "g%%s" %% pieces["short"]
    else:
        # exception #1
        rendered = "0.post%%d" %% pieces["distance"]
        if pieces["dirty"]:
            rendered += ".dev0"
        rendered += "+g%%s" %% pieces["short"]
    return rendered


def render_pep440_old(pieces):
    # TAG[.postDISTANCE[.dev0]] . The ".dev0" means dirty.

    # exceptions:
    # 1: no tags. 0.postDISTANCE[.dev0]

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"] or pieces["dirty"]:
            rendered += ".post%%d" %% pieces["distance"]
            if pieces["dirty"]:
                rendered += ".dev0"
    else:
        # exception #1
        rendered = "0.post%%d" %% pieces["distance"]
        if pieces["dirty"]:
            rendered += ".dev0"
    return rendered


def render_git_describe(pieces):
    # TAG[-DISTANCE-gHEX][-dirty], like 'git describe --tags --dirty
    # --always'

    # exceptions:
    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"]:
            rendered += "-%%d-g%%s" %% (pieces["distance"], pieces["short"])
    else:
        # exception #1
        rendered = pieces["short"]
    if pieces["dirty"]:
        rendered += "-dirty"
    return rendered


def render_git_describe_long(pieces):
    # TAG-DISTANCE-gHEX[-dirty], like 'git describe --tags --dirty
    # --always -long'. The distance/hash is unconditional.

    # exceptions:
    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        rendered += "-%%d-g%%s" %% (pieces["distance"], pieces["short"])
    else:
        # exception #1
        rendered = pieces["short"]
    if pieces["dirty"]:
        rendered += "-dirty"
    return rendered


def render(pieces, style):
    if pieces["error"]:
        return {"version": "unknown",
                "full-revisionid": pieces.get("long"),
                "dirty": None,
                "error": pieces["error"]}

    if not style or style == "default":
        style = "pep440"  # the default

    if style == "pep440":
        rendered = render_pep440(pieces)
    elif style == "pep440-pre":
        rendered = render_pep440_pre(pieces)
    elif style == "pep440-post":
        rendered = render_pep440_post(pieces)
    elif style == "pep440-old":
        rendered = render_pep440_old(pieces)
    elif style == "git-describe":
        rendered = render_git_describe(pieces)
    elif style == "git-describe-long":
        rendered = render_git_describe_long(pieces)
    else:
        raise ValueError("unknown style '%%s'" %% style)

    return {"version": rendered, "full-revisionid": pieces["long"],
            "dirty": pieces["dirty"], "error": None}


def get_versions():
    # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
    # __file__, we can work backwards from there to the root. Some
    # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
    # case we can only use expanded keywords.

    cfg = get_config()
    verbose = cfg.verbose

    try:
        return git_versions_from_keywords(get_keywords(), cfg.tag_prefix,
                                          verbose)
    except NotThisMethod:
        pass

    try:
        root = os.path.realpath(__file__)
        # versionfile_source is the relative path from the top of the source
        # tree (where the .git directory might live) to this file. Invert
        # this to find the root from __file__.
        for i in cfg.versionfile_source.split('/'):
            root = os.path.dirname(root)
    except NameError:
        return {"version": "0+unknown", "full-revisionid": None,
                "dirty": None,
                "error": "unable to find root of source tree"}

    try:
        pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
        return render(pieces, cfg.style)
    except NotThisMethod:
        pass

    try:
        if cfg.parentdir_prefix:
            return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
    except NotThisMethod:
        pass

    return {"version": "0+unknown", "full-revisionid": None,
            "dirty": None,
            "error": "unable to compute version"}
'''


@register_vcs_handler("git", "get_keywords")
def git_get_keywords(versionfile_abs):
    # the code embedded in _version.py can just fetch the value of these
    # keywords. When used from setup.py, we don't want to import _version.py,
    # so we do it with a regexp instead. This function is not used from
    # _version.py.
    keywords = {}
    try:
        f = open(versionfile_abs, "r")
        for line in f.readlines():
            if line.strip().startswith("git_refnames ="):
                mo = re.search(r'=\s*"(.*)"', line)
                if mo:
                    keywords["refnames"] = mo.group(1)
            if line.strip().startswith("git_full ="):
                mo = re.search(r'=\s*"(.*)"', line)
                if mo:
                    keywords["full"] = mo.group(1)
        f.close()
    except EnvironmentError:
        pass
    return keywords


@register_vcs_handler("git", "keywords")
def git_versions_from_keywords(keywords, tag_prefix, verbose):
    if not keywords:
        raise NotThisMethod("no keywords at all, weird")
    refnames = keywords["refnames"].strip()
    if refnames.startswith("$Format"):
        if verbose:
            print("keywords are unexpanded, not using")
        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
    refs = set([r.strip() for r in refnames.strip("()").split(",")])
    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
    TAG = "tag: "
    tags = set([r[len(TAG):] for r in refs if r.startswith(TAG)])
    if not tags:
        # Either we're using git < 1.8.3, or there really are no tags. We use
        # a heuristic: assume all version tags have a digit. The old git %d
        # expansion behaves like git log --decorate=short and strips out the
        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
        # between branches and tags. By ignoring refnames without digits, we
        # filter out many common branch names like "release" and
        # "stabilization", as well as "HEAD" and "master".
        tags = set([r for r in refs if re.search(r'\d', r)])
        if verbose:
            print("discarding '%s', no digits" % ",".join(refs-tags))
    if verbose:
        print("likely tags: %s" % ",".join(sorted(tags)))
    for ref in sorted(tags):
        # sorting will prefer e.g. "2.0" over "2.0rc1"
        if ref.startswith(tag_prefix):
            r = ref[len(tag_prefix):]
            if verbose:
                print("picking %s" % r)
            return {"version": r,
                    "full-revisionid": keywords["full"].strip(),
                    "dirty": False, "error": None
                    }
    # no suitable tags, so version is "0+unknown", but full hex is still there
    if verbose:
        print("no suitable tags, using unknown + full revision id")
    return {"version": "0+unknown",
            "full-revisionid": keywords["full"].strip(),
            "dirty": False, "error": "no suitable tags"}


@register_vcs_handler("git", "pieces_from_vcs")
def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
    # this runs 'git' from the root of the source tree. This only gets called
    # if the git-archive 'subst' keywords were *not* expanded, and
    # _version.py hasn't already been rewritten with a short version string,
    # meaning we're inside a checked out source tree.

    if not os.path.exists(os.path.join(root, ".git")):
        if verbose:
            print("no .git in %s" % root)
        raise NotThisMethod("no .git directory")

    GITS = ["git"]
    if sys.platform == "win32":
        GITS = ["git.cmd", "git.exe"]
    # if there is a tag, this yields TAG-NUM-gHEX[-dirty]
    # if there are no tags, this yields HEX[-dirty] (no NUM)
    describe_out = run_command(GITS, ["describe", "--tags", "--dirty",
                                      "--always", "--long"],
                               cwd=root)
    # --long was added in git-1.5.5
    if describe_out is None:
        raise NotThisMethod("'git describe' failed")
    describe_out = describe_out.strip()
    full_out = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
    if full_out is None:
        raise NotThisMethod("'git rev-parse' failed")
    full_out = full_out.strip()

    pieces = {}
    pieces["long"] = full_out
    pieces["short"] = full_out[:7]  # maybe improved later
    pieces["error"] = None

    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
    # TAG might have hyphens.
    git_describe = describe_out

    # look for -dirty suffix
    dirty = git_describe.endswith("-dirty")
    pieces["dirty"] = dirty
    if dirty:
        git_describe = git_describe[:git_describe.rindex("-dirty")]

    # now we have TAG-NUM-gHEX or HEX

    if "-" in git_describe:
        # TAG-NUM-gHEX
        mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
        if not mo:
            # unparseable. Maybe git-describe is misbehaving?
            pieces["error"] = ("unable to parse git-describe output: '%s'"
                               % describe_out)
            return pieces

        # tag
        full_tag = mo.group(1)
        if not full_tag.startswith(tag_prefix):
            if verbose:
                fmt = "tag '%s' doesn't start with prefix '%s'"
                print(fmt % (full_tag, tag_prefix))
            pieces["error"] = ("tag '%s' doesn't start with prefix '%s'"
                               % (full_tag, tag_prefix))
            return pieces
        pieces["closest-tag"] = full_tag[len(tag_prefix):]

        # distance: number of commits since tag
        pieces["distance"] = int(mo.group(2))

        # commit: short hex revision ID
        pieces["short"] = mo.group(3)

    else:
        # HEX: no tags
        pieces["closest-tag"] = None
        count_out = run_command(GITS, ["rev-list", "HEAD", "--count"],
                                cwd=root)
        pieces["distance"] = int(count_out)  # total number of commits

    return pieces


def do_vcs_install(manifest_in, versionfile_source, ipy):
    GITS = ["git"]
    if sys.platform == "win32":
        GITS = ["git.cmd", "git.exe"]
    files = [manifest_in, versionfile_source]
    if ipy:
        files.append(ipy)
    try:
        me = __file__
        if me.endswith(".pyc") or me.endswith(".pyo"):
            me = os.path.splitext(me)[0] + ".py"
        versioneer_file = os.path.relpath(me)
    except NameError:
        versioneer_file = "versioneer.py"
    files.append(versioneer_file)
    present = False
    try:
        f = open(".gitattributes", "r")
        for line in f.readlines():
            if line.strip().startswith(versionfile_source):
                if "export-subst" in line.strip().split()[1:]:
                    present = True
        f.close()
    except EnvironmentError:
        pass
    if not present:
        f = open(".gitattributes", "a+")
        f.write("%s export-subst\n" % versionfile_source)
        f.close()
        files.append(".gitattributes")
    run_command(GITS, ["add", "--"] + files)


def versions_from_parentdir(parentdir_prefix, root, verbose):
    # Source tarballs conventionally unpack into a directory that includes
    # both the project name and a version string.
    dirname = os.path.basename(root)
    if not dirname.startswith(parentdir_prefix):
        if verbose:
            print("guessing rootdir is '%s', but '%s' doesn't start with "
                  "prefix '%s'" % (root, dirname, parentdir_prefix))
        raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
    return {"version": dirname[len(parentdir_prefix):],
            "full-revisionid": None,
            "dirty": False, "error": None}

SHORT_VERSION_PY = """
# This file was generated by 'versioneer.py' (0.15) from
# revision-control system data, or from the parent directory name of an
# unpacked source archive. Distribution tarballs contain a pre-generated copy
# of this file.

import json
import sys

version_json = '''
%s
'''  # END VERSION_JSON


def get_versions():
    return json.loads(version_json)
"""


def versions_from_file(filename):
    try:
        with open(filename) as f:
            contents = f.read()
    except EnvironmentError:
        raise NotThisMethod("unable to read _version.py")
    mo = re.search(r"version_json = '''\n(.*)'''  # END VERSION_JSON",
                   contents, re.M | re.S)
    if not mo:
        raise NotThisMethod("no version_json in _version.py")
    return json.loads(mo.group(1))


def write_to_version_file(filename, versions):
    os.unlink(filename)
    contents = json.dumps(versions, sort_keys=True,
                          indent=1, separators=(",", ": "))
    with open(filename, "w") as f:
        f.write(SHORT_VERSION_PY % contents)

    print("set %s to '%s'" % (filename, versions["version"]))


def plus_or_dot(pieces):
    if "+" in pieces.get("closest-tag", ""):
        return "."
    return "+"


def render_pep440(pieces):
    # now build up version string, with post-release "local version
    # identifier". Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
    # get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty

    # exceptions:
    # 1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"] or pieces["dirty"]:
            rendered += plus_or_dot(pieces)
            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
            if pieces["dirty"]:
                rendered += ".dirty"
    else:
        # exception #1
        rendered = "0+untagged.%d.g%s" % (pieces["distance"],
                                          pieces["short"])
        if pieces["dirty"]:
            rendered += ".dirty"
    return rendered


def render_pep440_pre(pieces):
    # TAG[.post.devDISTANCE] . No -dirty

    # exceptions:
    # 1: no tags. 0.post.devDISTANCE

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"]:
            rendered += ".post.dev%d" % pieces["distance"]
    else:
        # exception #1
        rendered = "0.post.dev%d" % pieces["distance"]
    return rendered


def render_pep440_post(pieces):
    # TAG[.postDISTANCE[.dev0]+gHEX] . The ".dev0" means dirty. Note that
    # .dev0 sorts backwards (a dirty tree will appear "older" than the
    # corresponding clean one), but you shouldn't be releasing software with
    # -dirty anyways.

    # exceptions:
    # 1: no tags. 0.postDISTANCE[.dev0]

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"] or pieces["dirty"]:
            rendered += ".post%d" % pieces["distance"]
            if pieces["dirty"]:
                rendered += ".dev0"
            rendered += plus_or_dot(pieces)
            rendered += "g%s" % pieces["short"]
    else:
        # exception #1
        rendered = "0.post%d" % pieces["distance"]
        if pieces["dirty"]:
            rendered += ".dev0"
        rendered += "+g%s" % pieces["short"]
    return rendered


def render_pep440_old(pieces):
    # TAG[.postDISTANCE[.dev0]] . The ".dev0" means dirty.

    # exceptions:
    # 1: no tags. 0.postDISTANCE[.dev0]

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"] or pieces["dirty"]:
            rendered += ".post%d" % pieces["distance"]
            if pieces["dirty"]:
                rendered += ".dev0"
    else:
        # exception #1
        rendered = "0.post%d" % pieces["distance"]
        if pieces["dirty"]:
            rendered += ".dev0"
    return rendered


def render_git_describe(pieces):
    # TAG[-DISTANCE-gHEX][-dirty], like 'git describe --tags --dirty
    # --always'

    # exceptions:
    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        if pieces["distance"]:
            rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
    else:
        # exception #1
        rendered = pieces["short"]
    if pieces["dirty"]:
        rendered += "-dirty"
    return rendered


def render_git_describe_long(pieces):
    # TAG-DISTANCE-gHEX[-dirty], like 'git describe --tags --dirty
    # --always -long'. The distance/hash is unconditional.

    # exceptions:
    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)

    if pieces["closest-tag"]:
        rendered = pieces["closest-tag"]
        rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
    else:
        # exception #1
        rendered = pieces["short"]
    if pieces["dirty"]:
        rendered += "-dirty"
    return rendered


def render(pieces, style):
    if pieces["error"]:
        return {"version": "unknown",
                "full-revisionid": pieces.get("long"),
                "dirty": None,
                "error": pieces["error"]}

    if not style or style == "default":
        style = "pep440"  # the default

    if style == "pep440":
        rendered = render_pep440(pieces)
    elif style == "pep440-pre":
        rendered = render_pep440_pre(pieces)
    elif style == "pep440-post":
        rendered = render_pep440_post(pieces)
    elif style == "pep440-old":
        rendered = render_pep440_old(pieces)
    elif style == "git-describe":
        rendered = render_git_describe(pieces)
    elif style == "git-describe-long":
        rendered = render_git_describe_long(pieces)
    else:
        raise ValueError("unknown style '%s'" % style)

    return {"version": rendered, "full-revisionid": pieces["long"],
            "dirty": pieces["dirty"], "error": None}


class VersioneerBadRootError(Exception):
    pass


def get_versions(verbose=False):
    # returns dict with two keys: 'version' and 'full'

    if "versioneer" in sys.modules:
        # see the discussion in cmdclass.py:get_cmdclass()
        del sys.modules["versioneer"]

    root = get_root()
    cfg = get_config_from_root(root)

    assert cfg.VCS is not None, "please set [versioneer]VCS= in setup.cfg"
    handlers = HANDLERS.get(cfg.VCS)
    assert handlers, "unrecognized VCS '%s'" % cfg.VCS
    verbose = verbose or cfg.verbose
    assert cfg.versionfile_source is not None, \
        "please set versioneer.versionfile_source"
    assert cfg.tag_prefix is not None, "please set versioneer.tag_prefix"

    versionfile_abs = os.path.join(root, cfg.versionfile_source)

    # extract version from first of: _version.py, VCS command (e.g. 'git
    # describe'), parentdir. This is meant to work for developers using a
    # source checkout, for users of a tarball created by 'setup.py sdist',
    # and for users of a tarball/zipball created by 'git archive' or github's
    # download-from-tag feature or the equivalent in other VCSes.

    get_keywords_f = handlers.get("get_keywords")
    from_keywords_f = handlers.get("keywords")
    if get_keywords_f and from_keywords_f:
        try:
            keywords = get_keywords_f(versionfile_abs)
            ver = from_keywords_f(keywords, cfg.tag_prefix, verbose)
            if verbose:
                print("got version from expanded keyword %s" % ver)
            return ver
        except NotThisMethod:
            pass

    try:
        ver = versions_from_file(versionfile_abs)
        if verbose:
            print("got version from file %s %s" % (versionfile_abs, ver))
        return ver
    except NotThisMethod:
        pass

    from_vcs_f = handlers.get("pieces_from_vcs")
    if from_vcs_f:
        try:
            pieces = from_vcs_f(cfg.tag_prefix, root, verbose)
            ver = render(pieces, cfg.style)
            if verbose:
                print("got version from VCS %s" % ver)
            return ver
        except NotThisMethod:
            pass

    try:
        if cfg.parentdir_prefix:
            ver = versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
            if verbose:
                print("got version from parentdir %s" % ver)
            return ver
    except NotThisMethod:
        pass

    if verbose:
        print("unable to compute version")

    return {"version": "0+unknown", "full-revisionid": None,
            "dirty": None, "error": "unable to compute version"}


def get_version():
    return get_versions()["version"]


def get_cmdclass():
    if "versioneer" in sys.modules:
        del sys.modules["versioneer"]
        # this fixes the "python setup.py develop" case (also 'install' and
        # 'easy_install .'), in which subdependencies of the main project are
        # built (using setup.py bdist_egg) in the same python process. Assume
        # a main project A and a dependency B, which use different versions
        # of Versioneer. A's setup.py imports A's Versioneer, leaving it in
        # sys.modules by the time B's setup.py is executed, causing B to run
        # with the wrong versioneer. Setuptools wraps the sub-dep builds in a
        # sandbox that restores sys.modules to it's pre-build state, so the
        # parent is protected against the child's "import versioneer". By
        # removing ourselves from sys.modules here, before the child build
        # happens, we protect the child from the parent's versioneer too.
        # Also see https://github.com/warner/python-versioneer/issues/52

    cmds = {}

    # we add "version" to both distutils and setuptools
    from distutils.core import Command

    class cmd_version(Command):
        description = "report generated version string"
        user_options = []
        boolean_options = []

        def initialize_options(self):
            pass

        def finalize_options(self):
            pass

        def run(self):
            vers = get_versions(verbose=True)
            print("Version: %s" % vers["version"])
            print(" full-revisionid: %s" % vers.get("full-revisionid"))
            print(" dirty: %s" % vers.get("dirty"))
            if vers["error"]:
                print(" error: %s" % vers["error"])
    cmds["version"] = cmd_version

    # we override "build_py" in both distutils and setuptools
    #
    # most invocation pathways end up running build_py:
    #  distutils/build -> build_py
    #  distutils/install -> distutils/build ->..
    #  setuptools/bdist_wheel -> distutils/install ->..
    #  setuptools/bdist_egg -> distutils/install_lib -> build_py
    #  setuptools/install -> bdist_egg ->..
    #  setuptools/develop -> ?

    from distutils.command.build_py import build_py as _build_py

    class cmd_build_py(_build_py):
        def run(self):
            root = get_root()
            cfg = get_config_from_root(root)
            versions = get_versions()
            _build_py.run(self)
            # now locate _version.py in the new build/ directory and replace
            # it with an updated value
            if cfg.versionfile_build:
                target_versionfile = os.path.join(self.build_lib,
                                                  cfg.versionfile_build)
                print("UPDATING %s" % target_versionfile)
                write_to_version_file(target_versionfile, versions)
    cmds["build_py"] = cmd_build_py

    if "cx_Freeze" in sys.modules:  # cx_freeze enabled?
        from cx_Freeze.dist import build_exe as _build_exe

        class cmd_build_exe(_build_exe):
            def run(self):
                root = get_root()
                cfg = get_config_from_root(root)
                versions = get_versions()
                target_versionfile = cfg.versionfile_source
                print("UPDATING %s" % target_versionfile)
                write_to_version_file(target_versionfile, versions)

                _build_exe.run(self)
                os.unlink(target_versionfile)
                with open(cfg.versionfile_source, "w") as f:
                    LONG = LONG_VERSION_PY[cfg.VCS]
                    f.write(LONG %
                            {"DOLLAR": "$",
                             "STYLE": cfg.style,
                             "TAG_PREFIX": cfg.tag_prefix,
                             "PARENTDIR_PREFIX": cfg.parentdir_prefix,
                             "VERSIONFILE_SOURCE": cfg.versionfile_source,
                             })
        cmds["build_exe"] = cmd_build_exe
        del cmds["build_py"]

    # we override different "sdist" commands for both environments
    if "setuptools" in sys.modules:
        from setuptools.command.sdist import sdist as _sdist
    else:
        from distutils.command.sdist import sdist as _sdist

    class cmd_sdist(_sdist):
        def run(self):
            versions = get_versions()
            self._versioneer_generated_versions = versions
            # unless we update this, the command will keep using the old
            # version
            self.distribution.metadata.version = versions["version"]
            return _sdist.run(self)

        def make_release_tree(self, base_dir, files):
            root = get_root()
            cfg = get_config_from_root(root)
            _sdist.make_release_tree(self, base_dir, files)
            # now locate _version.py in the new base_dir directory
            # (remembering that it may be a hardlink) and replace it with an
            # updated value
            target_versionfile = os.path.join(base_dir, cfg.versionfile_source)
            print("UPDATING %s" % target_versionfile)
            write_to_version_file(target_versionfile,
                                  self._versioneer_generated_versions)
    cmds["sdist"] = cmd_sdist

    return cmds


CONFIG_ERROR = """
setup.cfg is missing the necessary Versioneer configuration. You need
a section like:

 [versioneer]
 VCS = git
 style = pep440
 versionfile_source = src/myproject/_version.py
 versionfile_build = myproject/_version.py
 tag_prefix = ""
 parentdir_prefix = myproject-

You will also need to edit your setup.py to use the results:

 import versioneer
 setup(version=versioneer.get_version(),
       cmdclass=versioneer.get_cmdclass(), ...)

Please read the docstring in ./versioneer.py for configuration instructions,
edit setup.cfg, and re-run the installer or 'python versioneer.py setup'.
"""

SAMPLE_CONFIG = """
# See the docstring in versioneer.py for instructions. Note that you must
# re-run 'versioneer.py setup' after changing this section, and commit the
# resulting files.

[versioneer]
#VCS = git
#style = pep440
#versionfile_source =
#versionfile_build =
#tag_prefix =
#parentdir_prefix =

"""

INIT_PY_SNIPPET = """
from ._version import get_versions
__version__ = get_versions()['version']
del get_versions
"""


def do_setup():
    root = get_root()
    try:
        cfg = get_config_from_root(root)
    except (EnvironmentError, configparser.NoSectionError,
            configparser.NoOptionError) as e:
        if isinstance(e, (EnvironmentError, configparser.NoSectionError)):
            print("Adding sample versioneer config to setup.cfg",
                  file=sys.stderr)
            with open(os.path.join(root, "setup.cfg"), "a") as f:
                f.write(SAMPLE_CONFIG)
        print(CONFIG_ERROR, file=sys.stderr)
        return 1

    print(" creating %s" % cfg.versionfile_source)
    with open(cfg.versionfile_source, "w") as f:
        LONG = LONG_VERSION_PY[cfg.VCS]
        f.write(LONG % {"DOLLAR": "$",
                        "STYLE": cfg.style,
                        "TAG_PREFIX": cfg.tag_prefix,
                        "PARENTDIR_PREFIX": cfg.parentdir_prefix,
                        "VERSIONFILE_SOURCE": cfg.versionfile_source,
                        })

    ipy = os.path.join(os.path.dirname(cfg.versionfile_source),
                       "__init__.py")
    if os.path.exists(ipy):
        try:
            with open(ipy, "r") as f:
                old = f.read()
        except EnvironmentError:
            old = ""
        if INIT_PY_SNIPPET not in old:
            print(" appending to %s" % ipy)
            with open(ipy, "a") as f:
                f.write(INIT_PY_SNIPPET)
        else:
            print(" %s unmodified" % ipy)
    else:
        print(" %s doesn't exist, ok" % ipy)
        ipy = None

    # Make sure both the top-level "versioneer.py" and versionfile_source
    # (PKG/_version.py, used by runtime code) are in MANIFEST.in, so
    # they'll be copied into source distributions. Pip won't be able to
    # install the package without this.
    manifest_in = os.path.join(root, "MANIFEST.in")
    simple_includes = set()
    try:
        with open(manifest_in, "r") as f:
            for line in f:
                if line.startswith("include "):
                    for include in line.split()[1:]:
                        simple_includes.add(include)
    except EnvironmentError:
        pass
    # That doesn't cover everything MANIFEST.in can do
    # (http://docs.python.org/2/distutils/sourcedist.html#commands), so
    # it might give some false negatives. Appending redundant 'include'
    # lines is safe, though.
    if "versioneer.py" not in simple_includes:
        print(" appending 'versioneer.py' to MANIFEST.in")
        with open(manifest_in, "a") as f:
            f.write("include versioneer.py\n")
    else:
        print(" 'versioneer.py' already in MANIFEST.in")
    if cfg.versionfile_source not in simple_includes:
        print(" appending versionfile_source ('%s') to MANIFEST.in" %
              cfg.versionfile_source)
        with open(manifest_in, "a") as f:
            f.write("include %s\n" % cfg.versionfile_source)
    else:
        print(" versionfile_source already in MANIFEST.in")

    # Make VCS-specific changes. For git, this means creating/changing
    # .gitattributes to mark _version.py for export-time keyword
    # substitution.
    do_vcs_install(manifest_in, cfg.versionfile_source, ipy)
    return 0


def scan_setup_py():
    found = set()
    setters = False
    errors = 0
    with open("setup.py", "r") as f:
        for line in f.readlines():
            if "import versioneer" in line:
                found.add("import")
            if "versioneer.get_cmdclass()" in line:
                found.add("cmdclass")
            if "versioneer.get_version()" in line:
                found.add("get_version")
            if "versioneer.VCS" in line:
                setters = True
            if "versioneer.versionfile_source" in line:
                setters = True
    if len(found) != 3:
        print("")
        print("Your setup.py appears to be missing some important items")
        print("(but I might be wrong). Please make sure it has something")
        print("roughly like the following:")
        print("")
        print(" import versioneer")
        print(" setup( version=versioneer.get_version(),")
        print("        cmdclass=versioneer.get_cmdclass(),  ...)")
        print("")
        errors += 1
    if setters:
        print("You should remove lines like 'versioneer.VCS = ' and")
        print("'versioneer.versionfile_source = ' . This configuration")
        print("now lives in setup.cfg, and should be removed from setup.py")
        print("")
        errors += 1
    return errors

if __name__ == "__main__":
    cmd = sys.argv[1]
    if cmd == "setup":
        errors = do_setup()
        errors += scan_setup_py()
        if errors:
            sys.exit(1)