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
|
import argparse
from collections import namedtuple
import sys
import re
ArgumentPack = namedtuple('ArgumentPack', ['name_or_flags', 'options'])
ArgumentGroup = namedtuple('ArgumentGroup', ['type', 'args', 'options'])
# list of available parsing options
MULTIPLIER = 1
PORT_LIST = 2
ALL_PORTS = 3
PORT_LIST_WITH_ALL = 4
FILE_PATH = 5
FILE_FROM_DB = 6
STREAM_FROM_PATH_OR_FILE = 7
DURATION = 8
FORCE = 9
# list of ArgumentGroup types
MUTEX = 1
def match_time_unit(val):
'''match some val against time shortcut inputs '''
match = re.match("^(\d+)([m|h]?)$", val)
if match:
digit = int(match.group(1))
unit = match.group(2)
if not unit:
return digit
elif unit == 'm':
return digit*60
else:
return digit*60*60
else:
raise argparse.ArgumentTypeError("Duration should be passed in the following format: \n"
"-d 100 : in sec \n"
"-d 10m : in min \n"
"-d 1h : in hours")
def match_multiplier(val):
'''match some val against multiplier shortcut inputs '''
match = re.match("^(\d+)(gb|kpps|%?)$", val)
if match:
digit = int(match.group(1))
unit = match.group(2)
if not unit:
return digit
elif unit == 'gb':
raise NotImplementedError("gb units are not supported yet")
else:
raise NotImplementedError("kpps units are not supported yet")
else:
raise argparse.ArgumentTypeError("Multiplier should be passed in the following format: \n"
"-m 100 : multiply stream file by this factor \n"
"-m 10gb : from graph calculate the maximum rate as this bandwidth (for each port)\n"
"-m 10kpps : from graph calculate the maximum rate as this pps (for each port)\n"
"-m 40% : from graph calculate the maximum rate as this percent from total port (for each port)")
OPTIONS_DB = {MULTIPLIER: ArgumentPack(['-m', '--multiplier'],
{'help': "Set multiplier for stream",
'dest': "mult",
'default': 1.0,
'type': match_multiplier}),
PORT_LIST: ArgumentPack(['--port'],
{"nargs": '+',
# "action": "store_"
'dest':'ports',
'metavar': 'PORTS',
# 'type': int,
'help': "A list of ports on which to apply the command",
'default': []}),
ALL_PORTS: ArgumentPack(['-a'],
{"action": "store_true",
"dest": "all_ports",
'help': "Set this flag to apply the command on all available ports"}),
DURATION: ArgumentPack(['-d'],
{"action": "store",
'metavar': 'TIME',
"type": match_time_unit,
'help': "Set duration time for TRex."}),
FORCE: ArgumentPack(['--force'],
{"action": "store_true",
'default': False,
'help': "Set if you want to stop active ports before applying new TRex run on them."}),
FILE_PATH: ArgumentPack(['-f'],
{'metavar': ('FILE', 'DB_NAME'),
'dest': 'file',
'nargs': 2,
'help': "File path to YAML file that describes a stream pack. "
"Second argument is a name to store the loaded yaml file into db."}),
FILE_FROM_DB: ArgumentPack(['--db'],
{'metavar': 'LOADED_STREAM_PACK',
'help': "A stream pack which already loaded into console cache."}),
# advanced options
PORT_LIST_WITH_ALL: ArgumentGroup(MUTEX, [PORT_LIST,
ALL_PORTS],
{'required': True}),
STREAM_FROM_PATH_OR_FILE: ArgumentGroup(MUTEX, [FILE_PATH,
FILE_FROM_DB],
{'required': True})
}
class CCmdArgParser(argparse.ArgumentParser):
def __init__(self, *args, **kwargs):
super(CCmdArgParser, self).__init__(*args, **kwargs)
# def exit(self, status=0, message=None):
# try:
# return super(CCmdArgParser, self).exit(status, message) # this will trigger system exit!
# except SystemExit:
# print "Caught system exit!!"
# return -1
# # return
def parse_args(self, args=None, namespace=None):
try:
return super(CCmdArgParser, self).parse_args(args, namespace)
except SystemExit:
# recover from system exit scenarios, such as "help", or bad arguments.
return None
def gen_parser(op_name, description, *args):
parser = CCmdArgParser(prog=op_name, conflict_handler='resolve',
# add_help=False,
description=description)
for param in args:
try:
argument = OPTIONS_DB[param]
if isinstance(argument, ArgumentGroup):
if argument.type == MUTEX:
# handle as mutually exclusive group
group = parser.add_mutually_exclusive_group(**argument.options)
for sub_argument in argument.args:
group.add_argument(*OPTIONS_DB[sub_argument].name_or_flags,
**OPTIONS_DB[sub_argument].options)
else:
# ignore invalid objects
continue
elif isinstance(argument, ArgumentPack):
parser.add_argument(*argument.name_or_flags,
**argument.options)
else:
# ignore invalid objects
continue
except KeyError as e:
cause = e.args[0]
raise KeyError("The attribute '{0}' is missing as a field of the {1} option.\n".format(cause, param))
return parser
if __name__ == "__main__":
pass
|
