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
|
# -*- coding: utf-8 -*-
# Copyright 2014 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
import sys
import os
import yaml
class ConfigError(Exception):
pass
class Config(object):
def __init__(self, args):
pass
@staticmethod
def abspath(file_path):
return os.path.abspath(file_path) if file_path else file_path
@classmethod
def check_file(cls, file_path, config_name):
if file_path is None:
raise ConfigError(
"Missing config for %s."
" You must specify a path for the config file. You can "
"do this with the -c or --config-path option. "
"Adding --generate-config along with --server-name "
"<server name> will generate a config file at the given path."
% (config_name,)
)
if not os.path.exists(file_path):
raise ConfigError(
"File % config for %s doesn't exist."
" Try running again with --generate-config"
% (config_name,)
)
return cls.abspath(file_path)
@classmethod
def read_file(cls, file_path, config_name):
cls.check_file(file_path, config_name)
with open(file_path) as file_stream:
return file_stream.read()
@staticmethod
def read_config_file(file_path):
with open(file_path) as file_stream:
return yaml.load(file_stream)
@classmethod
def add_arguments(cls, parser):
pass
@classmethod
def generate_config(cls, args, config_dir_path):
pass
@classmethod
def load_config(cls, description, argv, generate_section=None):
config_parser = argparse.ArgumentParser(add_help=False)
config_parser.add_argument(
"-c", "--config-path",
metavar="CONFIG_FILE",
help="Specify config file"
)
config_parser.add_argument(
"--generate-config",
action="store_true",
help="Generate config file"
)
config_args, remaining_args = config_parser.parse_known_args(argv)
if config_args.generate_config:
if not config_args.config_path:
config_parser.error(
"Must specify where to generate the config file"
)
config_dir_path = os.path.dirname(config_args.config_path)
if os.path.exists(config_args.config_path):
defaults = cls.read_config_file(config_args.config_path)
else:
defaults = {}
else:
if config_args.config_path:
defaults = cls.read_config_file(config_args.config_path)
else:
defaults = {}
parser = argparse.ArgumentParser(
parents=[config_parser],
description=description,
formatter_class=argparse.RawDescriptionHelpFormatter,
)
cls.add_arguments(parser)
parser.set_defaults(**defaults)
args = parser.parse_args(remaining_args)
if config_args.generate_config:
config_dir_path = os.path.dirname(config_args.config_path)
config_dir_path = os.path.abspath(config_dir_path)
if not os.path.exists(config_dir_path):
os.makedirs(config_dir_path)
cls.generate_config(args, config_dir_path)
config = {}
for key, value in vars(args).items():
if (key not in set(["config_path", "generate_config"])
and value is not None):
config[key] = value
with open(config_args.config_path, "w") as config_file:
# TODO(paul) it would be lovely if we wrote out vim- and emacs-
# style mode markers into the file, to hint to people that
# this is a YAML file.
yaml.dump(config, config_file, default_flow_style=False)
print (
"A config file has been generated in %s for server name"
" '%s' with corresponding SSL keys and self-signed"
" certificates. Please review this file and customise it to"
" your needs."
) % (
config_args.config_path, config['server_name']
)
print (
"If this server name is incorrect, you will need to regenerate"
" the SSL certificates"
)
sys.exit(0)
return cls(args)
|
