Uh oh!
There was an error while loading.Please reload this page.
- Notifications
You must be signed in to change notification settings - Fork966
Expand file tree
/
Copy pathcmd.py
More file actions
968 lines (799 loc) · 35.9 KB
/
cmd.py
File metadata and controls
968 lines (799 loc) · 35.9 KB
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
# cmd.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
fromcontextlibimportcontextmanager
importio
importlogging
importos
importsignal
fromsubprocessimport (
call,
Popen,
PIPE
)
importsubprocess
importsys
importthreading
fromgit.compatimport (
string_types,
defenc,
force_bytes,
PY3,
# just to satisfy flake8 on py3
unicode,
safe_decode,
is_posix,
is_win,
)
fromgit.excimportCommandError
fromgit.odictimportOrderedDict
fromgit.utilimportis_cygwin_git,cygpath
from .excimport (
GitCommandError,
GitCommandNotFound
)
from .utilimport (
LazyMixin,
stream_copy,
)
execute_kwargs=set(('istream','with_extended_output',
'with_exceptions','as_process','stdout_as_string',
'output_stream','with_stdout','kill_after_timeout',
'universal_newlines','shell'))
log=logging.getLogger(__name__)
log.addHandler(logging.NullHandler())
__all__= ('Git',)
# ==============================================================================
## @name Utilities
# ------------------------------------------------------------------------------
# Documentation
## @{
defhandle_process_output(process,stdout_handler,stderr_handler,
finalizer=None,decode_streams=True):
"""Registers for notifications to lean that process output is ready to read, and dispatches lines to
the respective line handlers.
This function returns once the finalizer returns
:return: result of finalizer
:param process: subprocess.Popen instance
:param stdout_handler: f(stdout_line_string), or None
:param stderr_handler: f(stderr_line_string), or None
:param finalizer: f(proc) - wait for proc to finish
:param decode_streams:
Assume stdout/stderr streams are binary and decode them before pushing\
their contents to handlers.
Set it to False if `universal_newline == True` (then streams are in text-mode)
or if decoding must happen later (i.e. for Diffs).
"""
# Use 2 "pupm" threads and wait for both to finish.
defpump_stream(cmdline,name,stream,is_decode,handler):
try:
forlineinstream:
ifhandler:
ifis_decode:
line=line.decode(defenc)
handler(line)
exceptExceptionasex:
log.error("Pumping %r of cmd(%s) failed due to: %r",name,cmdline,ex)
raiseCommandError(['<%s-pump>'%name]+cmdline,ex)
finally:
stream.close()
cmdline=getattr(process,'args','')# PY3+ only
ifnotisinstance(cmdline, (tuple,list)):
cmdline=cmdline.split()
pumps= []
ifprocess.stdout:
pumps.append(('stdout',process.stdout,stdout_handler))
ifprocess.stderr:
pumps.append(('stderr',process.stderr,stderr_handler))
threads= []
forname,stream,handlerinpumps:
t=threading.Thread(target=pump_stream,
args=(cmdline,name,stream,decode_streams,handler))
t.setDaemon(True)
t.start()
threads.append(t)
## FIXME: Why Join?? Will block if `stdin` needs feeding...
#
fortinthreads:
t.join()
iffinalizer:
returnfinalizer(process)
defdashify(string):
returnstring.replace('_','-')
defslots_to_dict(self,exclude=()):
returndict((s,getattr(self,s))forsinself.__slots__ifsnotinexclude)
defdict_to_slots_and__excluded_are_none(self,d,excluded=()):
fork,vind.items():
setattr(self,k,v)
forkinexcluded:
setattr(self,k,None)
## -- End Utilities -- @}
# value of Windows process creation flag taken from MSDN
CREATE_NO_WINDOW=0x08000000
## CREATE_NEW_PROCESS_GROUP is needed to allow killing it afterwards,
# see https://docs.python.org/3/library/subprocess.html#subprocess.Popen.send_signal
PROC_CREATIONFLAGS= (CREATE_NO_WINDOW|subprocess.CREATE_NEW_PROCESS_GROUP
ifis_winandsys.version_info>= (2,7)
else0)
classGit(LazyMixin):
"""
The Git class manages communication with the Git binary.
It provides a convenient interface to calling the Git binary, such as in::
g = Git( git_dir )
g.init() # calls 'git init' program
rval = g.ls_files() # calls 'git ls-files' program
``Debugging``
Set the GIT_PYTHON_TRACE environment variable print each invocation
of the command to stdout.
Set its value to 'full' to see details about the returned values.
"""
__slots__= ("_working_dir","cat_file_all","cat_file_header","_version_info",
"_git_options","_persistent_git_options","_environment")
_excluded_= ('cat_file_all','cat_file_header','_version_info')
def__getstate__(self):
returnslots_to_dict(self,exclude=self._excluded_)
def__setstate__(self,d):
dict_to_slots_and__excluded_are_none(self,d,excluded=self._excluded_)
# CONFIGURATION
# The size in bytes read from stdout when copying git's output to another stream
max_chunk_size=io.DEFAULT_BUFFER_SIZE
git_exec_name="git"# default that should work on linux and windows
# Enables debugging of GitPython's git commands
GIT_PYTHON_TRACE=os.environ.get("GIT_PYTHON_TRACE",False)
# Provide the full path to the git executable. Otherwise it assumes git is in the path
_git_exec_env_var="GIT_PYTHON_GIT_EXECUTABLE"
GIT_PYTHON_GIT_EXECUTABLE=os.environ.get(_git_exec_env_var,git_exec_name)
# If True, a shell will be used when executing git commands.
# This should only be desirable on Windows, see https://github.com/gitpython-developers/GitPython/pull/126
# and check `git/test_repo.py:TestRepo.test_untracked_files()` TC for an example where it is required.
# Override this value using `Git.USE_SHELL = True`
USE_SHELL=False
@classmethod
defis_cygwin(cls):
returnis_cygwin_git(cls.GIT_PYTHON_GIT_EXECUTABLE)
@classmethod
defpolish_url(cls,url,is_cygwin=None):
ifis_cygwinisNone:
is_cygwin=cls.is_cygwin()
ifis_cygwin:
url=cygpath(url)
else:
"""Remove any backslahes from urls to be written in config files.
Windows might create config-files containing paths with backslashed,
but git stops liking them as it will escape the backslashes.
Hence we undo the escaping just to be sure.
"""
url=url.replace("\\\\","\\").replace("\\","/")
returnurl
classAutoInterrupt(object):
"""Kill/Interrupt the stored process instance once this instance goes out of scope. It is
used to prevent processes piling up in case iterators stop reading.
Besides all attributes are wired through to the contained process object.
The wait method was overridden to perform automatic status code checking
and possibly raise."""
__slots__= ("proc","args")
def__init__(self,proc,args):
self.proc=proc
self.args=args
def__del__(self):
ifself.procisNone:
return
proc=self.proc
self.proc=None
ifproc.stdin:
proc.stdin.close()
ifproc.stdout:
proc.stdout.close()
ifproc.stderr:
proc.stderr.close()
# did the process finish already so we have a return code ?
ifproc.poll()isnotNone:
return
# can be that nothing really exists anymore ...
ifosisNoneorgetattr(os,'kill',None)isNone:
return
# try to kill it
try:
proc.terminate()
proc.wait()# ensure process goes away
exceptOSErrorasex:
log.info("Ignored error after process has dies: %r",ex)
pass# ignore error when process already died
exceptAttributeError:
# try windows
# for some reason, providing None for stdout/stderr still prints something. This is why
# we simply use the shell and redirect to nul. Its slower than CreateProcess, question
# is whether we really want to see all these messages. Its annoying no matter what.
call(("TASKKILL /F /T /PID %s 2>nul 1>nul"%str(proc.pid)),shell=True)
# END exception handling
def__getattr__(self,attr):
returngetattr(self.proc,attr)
defwait(self,stderr=b''):# TODO: Bad choice to mimic `proc.wait()` but with different args.
"""Wait for the process and return its status code.
:param stderr: Previously read value of stderr, in case stderr is already closed.
:warn: may deadlock if output or error pipes are used and not handled separately.
:raise GitCommandError: if the return status is not 0"""
ifstderrisNone:
stderr=b''
stderr=force_bytes(stderr)
status=self.proc.wait()
defread_all_from_possibly_closed_stream(stream):
try:
returnstderr+force_bytes(stream.read())
exceptValueError:
returnstderrorb''
ifstatus!=0:
errstr=read_all_from_possibly_closed_stream(self.proc.stderr)
log.debug('AutoInterrupt wait stderr: %r'% (errstr,))
raiseGitCommandError(self.args,status,errstr)
# END status handling
returnstatus
# END auto interrupt
classCatFileContentStream(object):
"""Object representing a sized read-only stream returning the contents of
an object.
It behaves like a stream, but counts the data read and simulates an empty
stream once our sized content region is empty.
If not all data is read to the end of the objects's lifetime, we read the
rest to assure the underlying stream continues to work"""
__slots__= ('_stream','_nbr','_size')
def__init__(self,size,stream):
self._stream=stream
self._size=size
self._nbr=0# num bytes read
# special case: if the object is empty, has null bytes, get the
# final newline right away.
ifsize==0:
stream.read(1)
# END handle empty streams
defread(self,size=-1):
bytes_left=self._size-self._nbr
ifbytes_left==0:
returnb''
ifsize>-1:
# assure we don't try to read past our limit
size=min(bytes_left,size)
else:
# they try to read all, make sure its not more than what remains
size=bytes_left
# END check early depletion
data=self._stream.read(size)
self._nbr+=len(data)
# check for depletion, read our final byte to make the stream usable by others
ifself._size-self._nbr==0:
self._stream.read(1)# final newline
# END finish reading
returndata
defreadline(self,size=-1):
ifself._nbr==self._size:
returnb''
# clamp size to lowest allowed value
bytes_left=self._size-self._nbr
ifsize>-1:
size=min(bytes_left,size)
else:
size=bytes_left
# END handle size
data=self._stream.readline(size)
self._nbr+=len(data)
# handle final byte
ifself._size-self._nbr==0:
self._stream.read(1)
# END finish reading
returndata
defreadlines(self,size=-1):
ifself._nbr==self._size:
returnlist()
# leave all additional logic to our readline method, we just check the size
out=list()
nbr=0
whileTrue:
line=self.readline()
ifnotline:
break
out.append(line)
ifsize>-1:
nbr+=len(line)
ifnbr>size:
break
# END handle size constraint
# END readline loop
returnout
def__iter__(self):
returnself
defnext(self):
line=self.readline()
ifnotline:
raiseStopIteration
returnline
def__del__(self):
bytes_left=self._size-self._nbr
ifbytes_left:
# read and discard - seeking is impossible within a stream
# includes terminating newline
self._stream.read(bytes_left+1)
# END handle incomplete read
def__init__(self,working_dir=None):
"""Initialize this instance with:
:param working_dir:
Git directory we should work in. If None, we always work in the current
directory as returned by os.getcwd().
It is meant to be the working tree directory if available, or the
.git directory in case of bare repositories."""
super(Git,self).__init__()
self._working_dir=working_dir
self._git_options= ()
self._persistent_git_options= []
# Extra environment variables to pass to git commands
self._environment= {}
# cached command slots
self.cat_file_header=None
self.cat_file_all=None
def__getattr__(self,name):
"""A convenience method as it allows to call the command as if it was
an object.
:return: Callable object that will execute call _call_process with your arguments."""
ifname[0]=='_':
returnLazyMixin.__getattr__(self,name)
returnlambda*args,**kwargs:self._call_process(name,*args,**kwargs)
defset_persistent_git_options(self,**kwargs):
"""Specify command line options to the git executable
for subsequent subcommand calls
:param kwargs:
is a dict of keyword arguments.
these arguments are passed as in _call_process
but will be passed to the git command rather than
the subcommand.
"""
self._persistent_git_options=self.transform_kwargs(
split_single_char_options=True,**kwargs)
def_set_cache_(self,attr):
ifattr=='_version_info':
# We only use the first 4 numbers, as everything else could be strings in fact (on windows)
version_numbers=self._call_process('version').split(' ')[2]
self._version_info=tuple(int(n)forninversion_numbers.split('.')[:4]ifn.isdigit())
else:
super(Git,self)._set_cache_(attr)
# END handle version info
@property
defworking_dir(self):
""":return: Git directory we are working on"""
returnself._working_dir
@property
defversion_info(self):
"""
:return: tuple(int, int, int, int) tuple with integers representing the major, minor
and additional version numbers as parsed from git version.
This value is generated on demand and is cached"""
returnself._version_info
defexecute(self,command,
istream=None,
with_extended_output=False,
with_exceptions=True,
as_process=False,
output_stream=None,
stdout_as_string=True,
kill_after_timeout=None,
with_stdout=True,
universal_newlines=False,
shell=None,
**subprocess_kwargs
):
"""Handles executing the command on the shell and consumes and returns
the returned information (stdout)
:param command:
The command argument list to execute.
It should be a string, or a sequence of program arguments. The
program to execute is the first item in the args sequence or string.
:param istream:
Standard input filehandle passed to subprocess.Popen.
:param with_extended_output:
Whether to return a (status, stdout, stderr) tuple.
:param with_exceptions:
Whether to raise an exception when git returns a non-zero status.
:param as_process:
Whether to return the created process instance directly from which
streams can be read on demand. This will render with_extended_output and
with_exceptions ineffective - the caller will have
to deal with the details himself.
It is important to note that the process will be placed into an AutoInterrupt
wrapper that will interrupt the process once it goes out of scope. If you
use the command in iterators, you should pass the whole process instance
instead of a single stream.
:param output_stream:
If set to a file-like object, data produced by the git command will be
output to the given stream directly.
This feature only has any effect if as_process is False. Processes will
always be created with a pipe due to issues with subprocess.
This merely is a workaround as data will be copied from the
output pipe to the given output stream directly.
Judging from the implementation, you shouldn't use this flag !
:param stdout_as_string:
if False, the commands standard output will be bytes. Otherwise, it will be
decoded into a string using the default encoding (usually utf-8).
The latter can fail, if the output contains binary data.
:param subprocess_kwargs:
Keyword arguments to be passed to subprocess.Popen. Please note that
some of the valid kwargs are already set by this method, the ones you
specify may not be the same ones.
:param with_stdout: If True, default True, we open stdout on the created process
:param universal_newlines:
if True, pipes will be opened as text, and lines are split at
all known line endings.
:param shell:
Whether to invoke commands through a shell (see `Popen(..., shell=True)`).
It overrides :attr:`USE_SHELL` if it is not `None`.
:param kill_after_timeout:
To specify a timeout in seconds for the git command, after which the process
should be killed. This will have no effect if as_process is set to True. It is
set to None by default and will let the process run until the timeout is
explicitly specified. This feature is not supported on Windows. It's also worth
noting that kill_after_timeout uses SIGKILL, which can have negative side
effects on a repository. For example, stale locks in case of git gc could
render the repository incapable of accepting changes until the lock is manually
removed.
:return:
* str(output) if extended_output = False (Default)
* tuple(int(status), str(stdout), str(stderr)) if extended_output = True
if ouput_stream is True, the stdout value will be your output stream:
* output_stream if extended_output = False
* tuple(int(status), output_stream, str(stderr)) if extended_output = True
Note git is executed with LC_MESSAGES="C" to ensure consistent
output regardless of system language.
:raise GitCommandError:
:note:
If you add additional keyword arguments to the signature of this method,
you must update the execute_kwargs tuple housed in this module."""
ifself.GIT_PYTHON_TRACEand (self.GIT_PYTHON_TRACE!='full'oras_process):
log.info(' '.join(command))
# Allow the user to have the command executed in their working dir.
cwd=self._working_diroros.getcwd()
# Start the process
env=os.environ.copy()
# Attempt to force all output to plain ascii english, which is what some parsing code
# may expect.
# According to stackoverflow (http://goo.gl/l74GC8), we are setting LANGUAGE as well
# just to be sure.
env["LANGUAGE"]="C"
env["LC_ALL"]="C"
env.update(self._environment)
ifis_win:
cmd_not_found_exception=OSError
ifkill_after_timeout:
raiseGitCommandError(command,'"kill_after_timeout" feature is not supported on Windows.')
else:
ifsys.version_info[0]>2:
cmd_not_found_exception=FileNotFoundError# NOQA # exists, flake8 unknown @UndefinedVariable
else:
cmd_not_found_exception=OSError
# end handle
stdout_sink= (PIPE
ifwith_stdout
elsegetattr(subprocess,'DEVNULL',None)oropen(os.devnull,'wb'))
log.debug("Popen(%s, cwd=%s, universal_newlines=%s, shell=%s)",
command,cwd,universal_newlines,shell)
try:
proc=Popen(command,
env=env,
cwd=cwd,
bufsize=-1,
stdin=istream,
stderr=PIPE,
stdout=stdout_sink,
shell=shellisnotNoneandshellorself.USE_SHELL,
close_fds=is_posix,# unsupported on windows
universal_newlines=universal_newlines,
creationflags=PROC_CREATIONFLAGS,
**subprocess_kwargs
)
exceptcmd_not_found_exceptionaserr:
raiseGitCommandNotFound(command,err)
ifas_process:
returnself.AutoInterrupt(proc,command)
def_kill_process(pid):
""" Callback method to kill a process. """
p=Popen(['ps','--ppid',str(pid)],stdout=PIPE,
creationflags=PROC_CREATIONFLAGS)
child_pids= []
forlineinp.stdout:
iflen(line.split())>0:
local_pid= (line.split())[0]
iflocal_pid.isdigit():
child_pids.append(int(local_pid))
try:
# Windows does not have SIGKILL, so use SIGTERM instead
sig=getattr(signal,'SIGKILL',signal.SIGTERM)
os.kill(pid,sig)
forchild_pidinchild_pids:
try:
os.kill(child_pid,sig)
exceptOSError:
pass
kill_check.set()# tell the main routine that the process was killed
exceptOSError:
# It is possible that the process gets completed in the duration after timeout
# happens and before we try to kill the process.
pass
return
# end
ifkill_after_timeout:
kill_check=threading.Event()
watchdog=threading.Timer(kill_after_timeout,_kill_process,args=(proc.pid,))
# Wait for the process to return
status=0
stdout_value=b''
stderr_value=b''
try:
ifoutput_streamisNone:
ifkill_after_timeout:
watchdog.start()
stdout_value,stderr_value=proc.communicate()
ifkill_after_timeout:
watchdog.cancel()
ifkill_check.isSet():
stderr_value='Timeout: the command "%s" did not complete in %d ' \
'secs.'% (" ".join(command),kill_after_timeout)
# strip trailing "\n"
ifstdout_value.endswith(b"\n"):
stdout_value=stdout_value[:-1]
ifstderr_value.endswith(b"\n"):
stderr_value=stderr_value[:-1]
status=proc.returncode
else:
stream_copy(proc.stdout,output_stream,self.max_chunk_size)
stdout_value=output_stream
stderr_value=proc.stderr.read()
# strip trailing "\n"
ifstderr_value.endswith(b"\n"):
stderr_value=stderr_value[:-1]
status=proc.wait()
# END stdout handling
finally:
proc.stdout.close()
proc.stderr.close()
ifself.GIT_PYTHON_TRACE=='full':
cmdstr=" ".join(command)
defas_text(stdout_value):
returnnotoutput_streamandsafe_decode(stdout_value)or'<OUTPUT_STREAM>'
# end
ifstderr_value:
log.info("%s -> %d; stdout: '%s'; stderr: '%s'",
cmdstr,status,as_text(stdout_value),safe_decode(stderr_value))
elifstdout_value:
log.info("%s -> %d; stdout: '%s'",cmdstr,status,as_text(stdout_value))
else:
log.info("%s -> %d",cmdstr,status)
# END handle debug printing
ifwith_exceptionsandstatus!=0:
raiseGitCommandError(command,status,stderr_value,stdout_value)
ifisinstance(stdout_value,bytes)andstdout_as_string:# could also be output_stream
stdout_value=safe_decode(stdout_value)
# Allow access to the command's status code
ifwith_extended_output:
return (status,stdout_value,safe_decode(stderr_value))
else:
returnstdout_value
defenvironment(self):
returnself._environment
defupdate_environment(self,**kwargs):
"""
Set environment variables for future git invocations. Return all changed
values in a format that can be passed back into this function to revert
the changes:
``Examples``::
old_env = self.update_environment(PWD='/tmp')
self.update_environment(**old_env)
:param kwargs: environment variables to use for git processes
:return: dict that maps environment variables to their old values
"""
old_env= {}
forkey,valueinkwargs.items():
# set value if it is None
ifvalueisnotNone:
old_env[key]=self._environment.get(key)
self._environment[key]=value
# remove key from environment if its value is None
elifkeyinself._environment:
old_env[key]=self._environment[key]
delself._environment[key]
returnold_env
@contextmanager
defcustom_environment(self,**kwargs):
"""
A context manager around the above ``update_environment`` method to restore the
environment back to its previous state after operation.
``Examples``::
with self.custom_environment(GIT_SSH='/bin/ssh_wrapper'):
repo.remotes.origin.fetch()
:param kwargs: see update_environment
"""
old_env=self.update_environment(**kwargs)
try:
yield
finally:
self.update_environment(**old_env)
deftransform_kwarg(self,name,value,split_single_char_options):
iflen(name)==1:
ifvalueisTrue:
return ["-%s"%name]
eliftype(value)isnotbool:
ifsplit_single_char_options:
return ["-%s"%name,"%s"%value]
else:
return ["-%s%s"% (name,value)]
else:
ifvalueisTrue:
return ["--%s"%dashify(name)]
eliftype(value)isnotbool:
return ["--%s=%s"% (dashify(name),value)]
return []
deftransform_kwargs(self,split_single_char_options=True,**kwargs):
"""Transforms Python style kwargs into git command line options."""
args=list()
kwargs=OrderedDict(sorted(kwargs.items(),key=lambdax:x[0]))
fork,vinkwargs.items():
ifisinstance(v, (list,tuple)):
forvalueinv:
args+=self.transform_kwarg(k,value,split_single_char_options)
else:
args+=self.transform_kwarg(k,v,split_single_char_options)
returnargs
@classmethod
def__unpack_args(cls,arg_list):
ifnotisinstance(arg_list, (list,tuple)):
# This is just required for unicode conversion, as subprocess can't handle it
# However, in any other case, passing strings (usually utf-8 encoded) is totally fine
ifnotPY3andisinstance(arg_list,unicode):
return [arg_list.encode(defenc)]
return [str(arg_list)]
outlist=list()
forarginarg_list:
ifisinstance(arg_list, (list,tuple)):
outlist.extend(cls.__unpack_args(arg))
elifnotPY3andisinstance(arg_list,unicode):
outlist.append(arg_list.encode(defenc))
# END recursion
else:
outlist.append(str(arg))
# END for each arg
returnoutlist
def__call__(self,**kwargs):
"""Specify command line options to the git executable
for a subcommand call
:param kwargs:
is a dict of keyword arguments.
these arguments are passed as in _call_process
but will be passed to the git command rather than
the subcommand.
``Examples``::
git(work_tree='/tmp').difftool()"""
self._git_options=self.transform_kwargs(
split_single_char_options=True,**kwargs)
returnself
def_call_process(self,method,*args,**kwargs):
"""Run the given git command with the specified arguments and return
the result as a String
:param method:
is the command. Contained "_" characters will be converted to dashes,
such as in 'ls_files' to call 'ls-files'.
:param args:
is the list of arguments. If None is included, it will be pruned.
This allows your commands to call git more conveniently as None
is realized as non-existent
:param kwargs:
is a dict of keyword arguments.
This function accepts the same optional keyword arguments
as execute().
``Examples``::
git.rev_list('master', max_count=10, header=True)
:return: Same as ``execute``"""
# Handle optional arguments prior to calling transform_kwargs
# otherwise these'll end up in args, which is bad.
_kwargs=dict()
forkwarginexecute_kwargs:
try:
_kwargs[kwarg]=kwargs.pop(kwarg)
exceptKeyError:
pass
insert_after_this_arg=kwargs.pop('insert_kwargs_after',None)
# Prepare the argument list
opt_args=self.transform_kwargs(**kwargs)
ext_args=self.__unpack_args([aforainargsifaisnotNone])
ifinsert_after_this_argisNone:
args=opt_args+ext_args
else:
try:
index=ext_args.index(insert_after_this_arg)
exceptValueError:
raiseValueError("Couldn't find argument '%s' in args %s to insert kwargs after"
% (insert_after_this_arg,str(ext_args)))
# end handle error
args=ext_args[:index+1]+opt_args+ext_args[index+1:]
# end handle kwargs
call= [self.GIT_PYTHON_GIT_EXECUTABLE]
# add persistent git options
call.extend(self._persistent_git_options)
# add the git options, then reset to empty
# to avoid side_effects
call.extend(self._git_options)
self._git_options= ()
call.append(dashify(method))
call.extend(args)
returnself.execute(call,**_kwargs)
def_parse_object_header(self,header_line):
"""
:param header_line:
<hex_sha> type_string size_as_int
:return: (hex_sha, type_string, size_as_int)
:raise ValueError: if the header contains indication for an error due to
incorrect input sha"""
tokens=header_line.split()
iflen(tokens)!=3:
ifnottokens:
raiseValueError("SHA could not be resolved, git returned: %r"% (header_line.strip()))
else:
raiseValueError("SHA %s could not be resolved, git returned: %r"% (tokens[0],header_line.strip()))
# END handle actual return value
# END error handling
iflen(tokens[0])!=40:
raiseValueError("Failed to parse header: %r"%header_line)
return (tokens[0],tokens[1],int(tokens[2]))
def_prepare_ref(self,ref):
# required for command to separate refs on stdin, as bytes
refstr=ref
ifisinstance(ref,bytes):
# Assume 40 bytes hexsha - bin-to-ascii for some reason returns bytes, not text
refstr=ref.decode('ascii')
elifnotisinstance(ref,string_types):
refstr=str(ref)# could be ref-object
ifnotrefstr.endswith("\n"):
refstr+="\n"
returnrefstr.encode(defenc)
def_get_persistent_cmd(self,attr_name,cmd_name,*args,**kwargs):
cur_val=getattr(self,attr_name)
ifcur_valisnotNone:
returncur_val
options= {"istream":PIPE,"as_process":True}
options.update(kwargs)
cmd=self._call_process(cmd_name,*args,**options)
setattr(self,attr_name,cmd)
returncmd
def__get_object_header(self,cmd,ref):
cmd.stdin.write(self._prepare_ref(ref))
cmd.stdin.flush()
returnself._parse_object_header(cmd.stdout.readline())
defget_object_header(self,ref):
""" Use this method to quickly examine the type and size of the object behind
the given ref.
:note: The method will only suffer from the costs of command invocation
once and reuses the command in subsequent calls.
:return: (hexsha, type_string, size_as_int)"""
cmd=self._get_persistent_cmd("cat_file_header","cat_file",batch_check=True)
returnself.__get_object_header(cmd,ref)
defget_object_data(self,ref):
""" As get_object_header, but returns object data as well
:return: (hexsha, type_string, size_as_int,data_string)
:note: not threadsafe"""
hexsha,typename,size,stream=self.stream_object_data(ref)
data=stream.read(size)
del(stream)
return (hexsha,typename,size,data)
defstream_object_data(self,ref):
""" As get_object_header, but returns the data as a stream
:return: (hexsha, type_string, size_as_int, stream)
:note: This method is not threadsafe, you need one independent Command instance per thread to be safe !"""
cmd=self._get_persistent_cmd("cat_file_all","cat_file",batch=True)
hexsha,typename,size=self.__get_object_header(cmd,ref)
return (hexsha,typename,size,self.CatFileContentStream(size,cmd.stdout))
defclear_cache(self):
"""Clear all kinds of internal caches to release resources.
Currently persistent commands will be interrupted.
:return: self"""
forcmdin (self.cat_file_all,self.cat_file_header):
ifcmd:
cmd.__del__()
self.cat_file_all=None
self.cat_file_header=None
returnself