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
|
# Copyright (c) 2015 RIPE NCC
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys
from contextlib import contextmanager
try:
from cStringIO import StringIO
except ImportError: # Python 3
from io import StringIO
class FakeTTY(object):
"""
Basic simulation of a user terminal.
"""
def __init__(self, file_obj):
self.file_obj = file_obj
def __getattr__(self, name):
return getattr(self.file_obj, name)
def isatty(self):
return True
@contextmanager
def capture_sys_output(use_fake_tty=False):
"""
Wrap a block with this, and it'll capture standard out and standard error
into handy variables:
with capture_sys_output() as (stdout, stderr):
self.cmd.run()
More info: https://stackoverflow.com/questions/18651705/
"""
capture_out, capture_err = StringIO(), StringIO()
current_out, current_err = sys.stdout, sys.stderr
current_in = sys.stdin
try:
if use_fake_tty:
sys.stdin = FakeTTY(current_in)
sys.stdout, sys.stderr = capture_out, capture_err
yield capture_out, capture_err
finally:
sys.stdout, sys.stderr = current_out, current_err
sys.stdin = current_in
|