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
|
#
# (c) 2015 Peter Sprygada, <psprygada@ansible.com>
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
#
import re
import time
import itertools
import shlex
import itertools
from ansible.module_utils.basic import BOOLEANS_TRUE, BOOLEANS_FALSE
from ansible.module_utils.network import to_list
DEFAULT_COMMENT_TOKENS = ['#', '!']
class ConfigLine(object):
def __init__(self, text):
self.text = text
self.children = list()
self.parents = list()
self.raw = None
@property
def line(self):
line = ['set']
line.extend([p.text for p in self.parents])
line.append(self.text)
return ' '.join(line)
def __str__(self):
return self.raw
def __eq__(self, other):
if self.text == other.text:
return self.parents == other.parents
def __ne__(self, other):
return not self.__eq__(other)
def ignore_line(text, tokens=None):
for item in (tokens or DEFAULT_COMMENT_TOKENS):
if text.startswith(item):
return True
def get_next(iterable):
item, next_item = itertools.tee(iterable, 2)
next_item = itertools.islice(next_item, 1, None)
return itertools.izip_longest(item, next_item)
def parse(lines, indent, comment_tokens=None):
toplevel = re.compile(r'\S')
childline = re.compile(r'^\s*(.+)$')
ancestors = list()
config = list()
for line in str(lines).split('\n'):
text = str(re.sub(r'([{};])', '', line)).strip()
cfg = ConfigLine(text)
cfg.raw = line
if not text or ignore_line(text, comment_tokens):
continue
# handle top level commands
if toplevel.match(line):
ancestors = [cfg]
# handle sub level commands
else:
match = childline.match(line)
line_indent = match.start(1)
level = int(line_indent / indent)
parent_level = level - 1
cfg.parents = ancestors[:level]
if level > len(ancestors):
config.append(cfg)
continue
for i in range(level, len(ancestors)):
ancestors.pop()
ancestors.append(cfg)
ancestors[parent_level].children.append(cfg)
config.append(cfg)
return config
class NetworkConfig(object):
def __init__(self, indent=None, contents=None, device_os=None):
self.indent = indent or 1
self._config = list()
self._device_os = device_os
if contents:
self.load(contents)
@property
def items(self):
return self._config
@property
def lines(self):
lines = list()
for item, next_item in get_next(self.items):
if next_item is None:
lines.append(item.line)
elif not next_item.line.startswith(item.line):
lines.append(item.line)
return lines
def __str__(self):
if self._device_os == 'junos':
lines = self.to_lines(self.expand(self.items))
return '\n'.join(lines)
return self.to_block(self.expand(self.items))
def load(self, contents):
self._config = parse(contents, indent=self.indent)
def load_from_file(self, filename):
self.load(open(filename).read())
def get(self, path):
if isinstance(path, basestring):
path = [path]
for item in self._config:
if item.text == path[-1]:
parents = [p.text for p in item.parents]
if parents == path[:-1]:
return item
def search(self, regexp, path=None):
regex = re.compile(r'^%s' % regexp, re.M)
if path:
parent = self.get(path)
if not parent or not parent.children:
return
children = [c.text for c in parent.children]
data = '\n'.join(children)
else:
data = str(self)
match = regex.search(data)
if match:
if match.groups():
values = match.groupdict().values()
groups = list(set(match.groups()).difference(values))
return (groups, match.groupdict())
else:
return match.group()
def findall(self, regexp):
regexp = r'%s' % regexp
return re.findall(regexp, str(self))
def expand(self, objs):
visited = set()
expanded = list()
for o in objs:
for p in o.parents:
if p not in visited:
visited.add(p)
expanded.append(p)
expanded.append(o)
visited.add(o)
return expanded
def to_lines(self, objects):
lines = list()
for obj in objects:
line = list()
line.extend([p.text for p in obj.parents])
line.append(obj.text)
lines.append(' '.join(line))
return lines
def to_block(self, section):
return '\n'.join([item.raw for item in section])
def get_section(self, path):
try:
section = self.get_section_objects(path)
if self._device_os == 'junos':
return self.to_lines(section)
return self.to_block(section)
except ValueError:
return list()
def get_section_objects(self, path):
if not isinstance(path, list):
path = [path]
obj = self.get_object(path)
if not obj:
raise ValueError('path does not exist in config')
return self.expand_section(obj)
def expand_section(self, configobj, S=None):
if S is None:
S = list()
S.append(configobj)
for child in configobj.children:
if child in S:
continue
self.expand_section(child, S)
return S
def get_object(self, path):
for item in self.items:
if item.text == path[-1]:
parents = [p.text for p in item.parents]
if parents == path[:-1]:
return item
def get_children(self, path):
obj = self.get_object(path)
if obj:
return obj.children
def difference(self, other, path=None, match='line', replace='line'):
updates = list()
config = self.items
if path:
config = self.get_children(path) or list()
if match == 'line':
for item in config:
if item not in other.items:
updates.append(item)
elif match == 'strict':
if path:
current = other.get_children(path) or list()
else:
current = other.items
for index, item in enumerate(config):
try:
if item != current[index]:
updates.append(item)
except IndexError:
updates.append(item)
elif match == 'exact':
if path:
current = other.get_children(path) or list()
else:
current = other.items
if len(current) != len(config):
updates.extend(config)
else:
for ours, theirs in itertools.izip(config, current):
if ours != theirs:
updates.extend(config)
break
if self._device_os == 'junos':
return updates
changes = list()
for update in updates:
if replace == 'block':
if update.parents:
changes.append(update.parents[-1])
for child in update.parents[-1].children:
changes.append(child)
else:
changes.append(update)
else:
changes.append(update)
updates = self.expand(changes)
return [item.text for item in updates]
def replace(self, patterns, repl, parents=None, add_if_missing=False,
ignore_whitespace=True):
match = None
parents = to_list(parents) or list()
patterns = [re.compile(r, re.I) for r in to_list(patterns)]
for item in self.items:
for regexp in patterns:
text = item.text
if not ignore_whitespace:
text = item.raw
if regexp.search(text):
if item.text != repl:
if parents == [p.text for p in item.parents]:
match = item
break
if match:
match.text = repl
indent = len(match.raw) - len(match.raw.lstrip())
match.raw = repl.rjust(len(repl) + indent)
elif add_if_missing:
self.add(repl, parents=parents)
def add(self, lines, parents=None):
"""Adds one or lines of configuration
"""
ancestors = list()
offset = 0
obj = None
## global config command
if not parents:
for line in to_list(lines):
item = ConfigLine(line)
item.raw = line
if item not in self.items:
self.items.append(item)
else:
for index, p in enumerate(parents):
try:
i = index + 1
obj = self.get_section_objects(parents[:i])[0]
ancestors.append(obj)
except ValueError:
# add parent to config
offset = index * self.indent
obj = ConfigLine(p)
obj.raw = p.rjust(len(p) + offset)
if ancestors:
obj.parents = list(ancestors)
ancestors[-1].children.append(obj)
self.items.append(obj)
ancestors.append(obj)
# add child objects
for line in to_list(lines):
# check if child already exists
for child in ancestors[-1].children:
if child.text == line:
break
else:
offset = len(parents) * self.indent
item = ConfigLine(line)
item.raw = line.rjust(len(line) + offset)
item.parents = ancestors
ancestors[-1].children.append(item)
self.items.append(item)
|