Repository navigation
Expand file tree
/
Copy pathrun_cmd.py
More file actions
509 lines (451 loc) · 16.8 KB
/
Copy pathrun_cmd.py
File metadata and controls
509 lines (451 loc) · 16.8 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
import sys
import os
import time
import subprocess
import threading
import warnings
import re
import queue
class RunCmdException(Exception):
"""
Raised by function :func:`run_cmd`.
"""
pass
def get_interpreter_path():
"""
Returns the interpreter path.
"""
if sys.platform.startswith("win"):
return sys.executable.replace("pythonw.exe", "python.exe")
else:
return sys.executable
def split_cmp_command(cmd, remove_quotes=True):
"""
Splits a command line.
:param cmd: command line
:param remove_quotes: True by default
:return: list
"""
if isinstance(cmd, str):
spl = cmd.split()
res = []
for s in spl:
if len(res) == 0:
res.append(s)
elif res[-1].startswith('"') and not res[-1].endswith('"'):
res[-1] += " " + s
else:
res.append(s)
if remove_quotes:
nres = []
for _ in res:
if _.startswith('"') and _.endswith('"'):
nres.append(_.strip('"'))
else:
nres.append(_)
return nres
else:
return res
else:
return cmd
def decode_outerr(outerr, encoding, encerror, msg):
"""
Decodes the output or the error after running a command line instructions.
:param outerr: output or error
:param encoding: encoding (if None, it is replaced by ascii)
:param encerror: how to handle errors
:param msg: to add to the exception message
:return: converted string
"""
if encoding is None:
encoding = "ascii"
typstr = str
if not isinstance(outerr, bytes):
raise TypeError("only able to decode bytes, not " + typstr(type(outerr)))
try:
out = outerr.decode(encoding, errors=encerror)
return out
except UnicodeDecodeError as exu:
try:
out = outerr.decode(
"utf8" if encoding != "utf8" else "latin-1", errors=encerror
)
return out
except Exception as e:
out = outerr.decode(encoding, errors="ignore")
raise RuntimeError(
f"issue with cmd ({encoding}):{typstr(msg)}\n{typstr(exu)}"
"\n-----\n{out}"
) from e
raise RuntimeError("complete issue with cmd:" + typstr(msg))
def skip_run_cmd(
cmd,
sin="",
shell=True,
wait=False,
log_error=True,
stop_running_if=None,
encerror="ignore",
encoding="utf8",
change_path=None,
communicate=True,
preprocess=True,
timeout=None,
catch_exit=False,
logf=None,
timeout_listen=None,
tell_if_no_output=None,
prefix_log=None,
):
"""
Has the same signature as :func:`run_cmd` but does nothing.
"""
return "", ""
def run_cmd(
cmd,
sin="",
shell=None,
wait=False,
log_error=True,
stop_running_if=None,
encerror="ignore",
encoding="utf8",
change_path=None,
communicate=True,
preprocess=True,
timeout=None,
catch_exit=False,
logf=None,
tell_if_no_output=None,
prefix_log=None,
):
"""
Runs a command line and wait for the result.
:param cmd: command line
:param sin: sin: what must be written on the standard input
:param shell: if True, cmd is a shell command (and no command window is opened)
:param wait: call ``proc.wait``
:param log_error: if log_error, call logf (error)
:param stop_running_if: the function stops waiting if some condition is fulfilled.
The function received the last line from the logs.
Signature: ``stop_waiting_if(last_out, last_err) -> bool``.
The function must return True to stop waiting.
This function can also be used to intercept the standard output
and the standard error while running.
:param encerror: encoding errors (ignore by default)
while converting the output into a string
:param encoding: encoding of the output
:param change_path: change the current path if not None
(put it back after the execution)
:param communicate: use method `communicate
<https://docs.python.org/3/library/subprocess.html
#subprocess.Popen.communicate>`_
which is supposed to be safer, parameter ``wait`` must be True
:param preprocess: preprocess the command line
if necessary (not available on Windows)
(False to disable that option)
:param timeout: when data is sent to stdin (``sin``), a timeout is needed to avoid
waiting for ever (*timeout* is in seconds)
:param catch_exit: catch *SystemExit* exception
:param logf: logging function (if not None, bypass others parameters)
:param tell_if_no_output: tells if there is no output every
*tell_if_no_output* seconds
:param prefix_log: add a prefix to a line before printing it
:return: content of stdout, stdres (only if wait is True)
::
from sphinx_runpython.runpython import run_cmd
out, err = run_cmd("python setup.py install", wait=True)
If you are using this function to run :epkg:`git` function, parameter
``shell`` must be True.
The function catches *SystemExit* exception.
See `Constantly print Subprocess output while process is running
<http://stackoverflow.com/questions/4417546/
constantly-print-subprocess-output-while-process-is-running/4417735>`_.
If *wait* is False, the function returns the started process.
``__exit__`` should be called if wait if False.
Parameter *prefix_log* was added.
"""
if shell is None:
shell = sys.platform.startswith("win")
if prefix_log is None:
prefix_log = ""
if logf is not None:
if isinstance(cmd, (list, tuple)):
logf(prefix_log + "[run_cmd] execute", " ".join(cmd))
else:
logf(prefix_log + "[run_cmd] execute", cmd)
if change_path is not None:
current = os.getcwd()
os.chdir(change_path)
if sys.platform.startswith("win"):
cmdl = cmd
else:
cmdl = split_cmp_command(cmd) if preprocess else cmd
if catch_exit:
try:
pproc = subprocess.Popen(
cmdl,
shell=shell,
stdin=subprocess.PIPE if sin is not None and len(sin) > 0 else None,
stdout=subprocess.PIPE if wait else None,
stderr=subprocess.PIPE if wait else None,
)
except SystemExit as e:
if change_path is not None:
os.chdir(current)
raise RunCmdException("SystemExit raised (1)") from e
else:
pproc = subprocess.Popen(
cmdl,
shell=shell,
stdin=subprocess.PIPE if sin is not None and len(sin) > 0 else None,
stdout=subprocess.PIPE if wait else None,
stderr=subprocess.PIPE if wait else None,
)
pproc.__enter__()
if isinstance(cmd, list):
cmd = " ".join(cmd)
if wait:
skip_out_err = False
out = []
err = []
err_read = False
skip_waiting = False
if communicate:
# communicate is True
if tell_if_no_output is not None:
raise NotImplementedError(
"tell_if_no_output is not implemented when communicate is True"
)
if stop_running_if is not None:
raise NotImplementedError(
"stop_running_if is not implemented when communicate is True"
)
input = sin if sin is None else sin.encode()
if input is not None and len(input) > 0:
if logf is not None:
logf(prefix_log + "[run_cmd] input", [input])
if catch_exit:
try:
stdoutdata, stderrdata = pproc.communicate(
input=input, timeout=timeout
)
except SystemExit as e:
if change_path is not None:
os.chdir(current)
raise RunCmdException("SystemExit raised (2)") from e
else:
stdoutdata, stderrdata = pproc.communicate(input=input, timeout=timeout)
out = decode_outerr(stdoutdata, encoding, encerror, cmd)
err = decode_outerr(stderrdata, encoding, encerror, cmd)
else:
# communicate is False: use of threads
if sin is not None and len(sin) > 0:
if change_path is not None:
os.chdir(current)
pproc.__exit__(None, None, None)
raise RuntimeError(
"Argument 'communicate' should be True to send "
"something on stdin."
)
stdout, stderr = pproc.stdout, pproc.stderr
begin = time.perf_counter()
last_update = begin
# with threads
(stdoutReader, stdoutQueue) = _AsyncLineReader.getForFd(
stdout, catch_exit=catch_exit
)
(stderrReader, stderrQueue) = _AsyncLineReader.getForFd(
stderr, catch_exit=catch_exit
)
runloop = True
while (not stdoutReader.eof() or not stderrReader.eof()) and runloop:
while not stdoutQueue.empty():
line = stdoutQueue.get()
decol = decode_outerr(line, encoding, encerror, cmd)
sdecol = decol.strip("\n\r")
if logf is not None:
logf(prefix_log + sdecol)
out.append(sdecol)
last_update = time.perf_counter()
if stop_running_if is not None and stop_running_if(decol, None):
runloop = False
break
while not stderrQueue.empty():
line = stderrQueue.get()
decol = decode_outerr(line, encoding, encerror, cmd)
sdecol = decol.strip("\n\r")
if logf is not None:
logf(prefix_log + sdecol)
err.append(sdecol)
last_update = time.perf_counter()
if stop_running_if is not None and stop_running_if(None, decol):
runloop = False
break
time.sleep(0.05)
delta = time.perf_counter() - last_update
if tell_if_no_output is not None and delta >= tell_if_no_output:
logf(
prefix_log
+ "[run_cmd] No update in {0} seconds for cmd: {1}".format(
"%5.1f" % (last_update - begin), cmd
)
)
last_update = time.perf_counter()
full_delta = time.perf_counter() - begin
if timeout is not None and full_delta > timeout:
runloop = False
logf(
prefix_log
+ "[run_cmd] Timeout after {0} seconds for cmd: {1}".format(
"%5.1f" % full_delta, cmd
)
)
break
if runloop:
# Waiting for async readers to finish...
stdoutReader.join()
stderrReader.join()
# Waiting for process to exit...
returnCode = pproc.wait()
err_read = True
if returnCode != 0:
if change_path is not None:
os.chdir(current)
try:
# we try to close the ressources
stdout.close()
stderr.close()
except Exception:
warnings.warn(
"Unable to close stdout and sterr.", RuntimeWarning
)
if catch_exit:
mes = (
"SystemExit raised with error code {0}\nCMD:\n{1}\n"
"CWD:\n{2}\n#---OUT---#\n{3}\n#---ERR---#\n{4}"
)
raise RunCmdException(
mes.format(
returnCode,
cmd,
os.getcwd(),
"\n".join(out),
"\n".join(err),
)
)
raise subprocess.CalledProcessError(returnCode, cmd)
if not skip_waiting:
pproc.wait()
else:
out.append("[run_cmd] killing process.")
logf(
prefix_log
+ "[run_cmd] killing process because stop_running_if returned True."
)
pproc.kill()
err_read = True
logf(prefix_log + "[run_cmd] process killed.")
skip_out_err = True
out = "\n".join(out)
if skip_out_err:
err = "Process killed."
else:
if err_read:
err = "\n".join(err)
else:
temp = err = stderr.read()
try:
err = decode_outerr(temp, encoding, encerror, cmd)
except Exception:
err = decode_outerr(temp, encoding, "ignore", cmd)
stdout.close()
stderr.close()
# same path for whether communicate is False or True
err = err.replace("\r\n", "\n")
if logf is not None:
logf(prefix_log + "end of execution", cmd)
if len(err) > 0 and log_error and logf is not None:
if "\n" in err:
logf(prefix_log + "[run_cmd] stderr (log)")
for eline in err.split("\n"):
logf(prefix_log + eline)
else:
logf(prefix_log + f"[run_cmd] stderr (log)\n{err}")
if change_path is not None:
os.chdir(current)
pproc.__exit__(None, None, None)
if sys.platform.startswith("win"):
if err is not None:
err = err.strip("\n\r\t ")
return out.replace("\r\n", "\n"), err.replace("\r\n", "\n")
else:
if err is not None:
err = err.strip("\n\r\t ")
return out, err
else:
if change_path is not None:
os.chdir(current)
return pproc, None
def parse_exception_message(exc):
"""
Parses the message embedded in an exception and returns the
standard output and error if it can be found.
:param exc: exception coming :func:`run_cmd`
:return: out, err
"""
mes = str(exc)
reg = re.compile(".*#---OUT---#(.*)#---ERR---#(.*)", re.DOTALL)
find = reg.search(mes.replace("\r", ""))
if find:
gr = find.groups()
out, err = gr[0], gr[1]
return out.strip("\n "), err.strip("\n ")
else:
return None, None
def run_script(script, *args, **kwargs):
"""
Runs a script.
:param script: script to execute or command line starting with ``-m``
:param args: other parameters
:param kwargs: sent to :func:`run_cmd`
:return: out,err content of stdout stream and stderr stream
Allows command line starting with ``-m``.
"""
if not script.startswith("-m") and not os.path.exists(script):
raise FileNotFoundError(f"File {script!r} not found.")
py = get_interpreter_path()
cmd = f"{py} {script}"
if len(args) > 0:
typstr = str
cmd += " " + " ".join([typstr(x) for x in args])
out, err = run_cmd(cmd, **kwargs)
return out, err
class _AsyncLineReader(threading.Thread):
def __init__(self, fd, outputQueue, catch_exit):
threading.Thread.__init__(self)
assert isinstance(outputQueue, queue.Queue)
assert callable(fd.readline)
self.fd = fd
self.catch_exit = catch_exit
self.outputQueue = outputQueue
def run(self):
if self.catch_exit:
try:
for _ in map(self.outputQueue.put, iter(self.fd.readline, b"")):
pass
except SystemExit as e:
self.outputQueue.put(str(e))
raise RunCmdException("SystemExit raised (3)") from e
else:
for _ in map(self.outputQueue.put, iter(self.fd.readline, b"")):
pass
def eof(self):
return not self.is_alive() and self.outputQueue.empty()
@classmethod
def getForFd(cls, fd, start=True, catch_exit=False):
q = queue.Queue()
reader = cls(fd, q, catch_exit)
if start:
reader.start()
return reader, q