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6005ef9b MW |
1 | #! @PYTHON@ |
2 | ### -*-python-*- | |
3 | ### | |
4 | ### Build a CDB file from configuration file | |
5 | ### | |
6 | ### (c) 2007 Straylight/Edgeware | |
7 | ### | |
8 | ||
9 | ###----- Licensing notice --------------------------------------------------- | |
10 | ### | |
11 | ### This file is part of Trivial IP Encryption (TrIPE). | |
12 | ### | |
11ad66c2 MW |
13 | ### TrIPE is free software: you can redistribute it and/or modify it under |
14 | ### the terms of the GNU General Public License as published by the Free | |
15 | ### Software Foundation; either version 3 of the License, or (at your | |
16 | ### option) any later version. | |
6005ef9b | 17 | ### |
11ad66c2 MW |
18 | ### TrIPE is distributed in the hope that it will be useful, but WITHOUT |
19 | ### ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
20 | ### FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
21 | ### for more details. | |
6005ef9b MW |
22 | ### |
23 | ### You should have received a copy of the GNU General Public License | |
11ad66c2 | 24 | ### along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
6005ef9b MW |
25 | |
26 | VERSION = '@VERSION@' | |
27 | ||
28 | ###-------------------------------------------------------------------------- | |
29 | ### External dependencies. | |
30 | ||
6005ef9b MW |
31 | import mLib as M |
32 | from optparse import OptionParser | |
33 | import cdb as CDB | |
34 | from sys import stdin, stdout, exit, argv | |
35 | import re as RX | |
36 | import os as OS | |
97567475 | 37 | import socket as S |
b7e5aa06 | 38 | from cStringIO import StringIO |
6005ef9b MW |
39 | |
40 | ###-------------------------------------------------------------------------- | |
41 | ### Utilities. | |
42 | ||
43 | class CDBFake (object): | |
44 | """Like cdbmake, but just outputs data suitable for cdb-map.""" | |
45 | def __init__(me, file = stdout): | |
46 | me.file = file | |
47 | def add(me, key, value): | |
48 | me.file.write('%s:%s\n' % (key, value)) | |
49 | def finish(me): | |
50 | pass | |
51 | ||
1c4623dd MW |
52 | class ExpectedError (Exception): pass |
53 | ||
6005ef9b MW |
54 | ###-------------------------------------------------------------------------- |
55 | ### A bulk DNS resolver. | |
56 | ||
1c4623dd | 57 | class ResolverFailure (ExpectedError): |
6f48da4a MW |
58 | def __init__(me, host, msg): |
59 | me.host = host | |
60 | me.msg = msg | |
61 | def __str__(me): | |
62 | return "failed to resolve `%s': %s" % (me.host, me.msg) | |
63 | ||
660564a1 MW |
64 | class ResolvingHost (object): |
65 | """ | |
66 | A host name which is being looked up by a bulk-resolver instance. | |
ef7d7afb MW |
67 | |
68 | Most notably, this is where the flag-handling logic lives for the | |
69 | $FLAGS[HOSTNAME] syntax. | |
660564a1 MW |
70 | """ |
71 | ||
72 | def __init__(me, name): | |
73 | """Make a new resolving-host object for the host NAME.""" | |
74 | me.name = name | |
97567475 | 75 | me.addr = { 'INET': [], 'INET6': [] } |
660564a1 MW |
76 | me.failure = None |
77 | ||
cc72e4b3 MW |
78 | def addaddr(me, af, addr): |
79 | """ | |
80 | Add the address ADDR with address family AF. | |
81 | ||
97567475 | 82 | The address family may be `INET' or `INET6'. |
cc72e4b3 MW |
83 | """ |
84 | me.addr[af].append(addr) | |
660564a1 MW |
85 | |
86 | def failed(me, msg): | |
87 | """ | |
88 | Report that resolution of this host failed, with a human-readable MSG. | |
89 | """ | |
90 | me.failure = msg | |
91 | ||
ef7d7afb MW |
92 | def get(me, flags): |
93 | """Return a list of addresses according to the FLAGS string.""" | |
660564a1 | 94 | if me.failure is not None: raise ResolverFailure(me.name, me.failure) |
cc72e4b3 MW |
95 | aa = [] |
96 | a4 = me.addr['INET'] | |
97567475 | 97 | a6 = me.addr['INET6'] |
cc72e4b3 | 98 | all, any = False, False |
ef7d7afb MW |
99 | for ch in flags: |
100 | if ch == '*': all = True | |
cc72e4b3 | 101 | elif ch == '4': aa += a4; any = True |
97567475 | 102 | elif ch == '6': aa += a6; any = True |
ef7d7afb | 103 | else: raise ValueError("unknown address-resolution flag `%s'" % ch) |
97567475 | 104 | if not any: aa = a4 + a6 |
ef7d7afb MW |
105 | if not aa: raise ResolverFailure(me.name, 'no matching addresses found') |
106 | if not all: aa = [aa[0]] | |
107 | return aa | |
660564a1 | 108 | |
ad367891 | 109 | class BaseBulkResolver (object): |
6005ef9b MW |
110 | """ |
111 | Resolve a number of DNS names in parallel. | |
112 | ||
113 | The BulkResovler resolves a number of hostnames in parallel. Using it | |
114 | works in three phases: | |
115 | ||
116 | 1. You call prepare(HOSTNAME) a number of times, to feed in the hostnames | |
117 | you're interested in. | |
118 | ||
119 | 2. You call run() to actually drive the resolver. | |
120 | ||
121 | 3. You call lookup(HOSTNAME) to get the address you wanted. This will | |
122 | fail with KeyError if the resolver couldn't resolve the HOSTNAME. | |
123 | """ | |
124 | ||
125 | def __init__(me): | |
126 | """Initialize the resolver.""" | |
6005ef9b | 127 | me._namemap = {} |
81b1fdde | 128 | |
660564a1 MW |
129 | def prepare(me, name): |
130 | """Prime the resolver to resolve the given host NAME.""" | |
131 | if name not in me._namemap: | |
132 | me._namemap[name] = host = ResolvingHost(name) | |
97567475 MW |
133 | try: |
134 | ailist = S.getaddrinfo(name, None, S.AF_UNSPEC, S.SOCK_DGRAM, 0, | |
135 | S.AI_NUMERICHOST | S.AI_NUMERICSERV) | |
136 | except S.gaierror: | |
137 | me._prepare(host, name) | |
138 | else: | |
139 | for af, skty, proto, cname, sa in ailist: | |
140 | if af == S.AF_INET: host.addaddr('INET', sa[0]) | |
141 | elif af == S.AF_INET6: host.addaddr('INET6', sa[0]) | |
6005ef9b | 142 | |
ef7d7afb | 143 | def lookup(me, name, flags): |
660564a1 | 144 | """Fetch the address corresponding to the host NAME.""" |
ef7d7afb | 145 | return me._namemap[name].get(flags) |
6005ef9b | 146 | |
ad367891 MW |
147 | class BresBulkResolver (BaseBulkResolver): |
148 | """ | |
149 | A BulkResolver using mLib's `bres' background resolver. | |
150 | ||
151 | This is always available (and might use ADNS), but only does IPv4. | |
152 | """ | |
153 | ||
154 | def __init__(me): | |
155 | super(BresBulkResolver, me).__init__() | |
156 | """Initialize the resolver.""" | |
157 | me._noutstand = 0 | |
158 | ||
159 | def _prepare(me, host, name): | |
160 | """Arrange to resolve a NAME, reporting the results to HOST.""" | |
161 | host._resolv = M.SelResolveByName( | |
162 | name, | |
163 | lambda cname, alias, addr: me._resolved(host, cname, addr), | |
164 | lambda: me._resolved(host, None, [])) | |
165 | me._noutstand += 1 | |
166 | ||
167 | def run(me): | |
168 | """Run the background DNS resolver until it's finished.""" | |
169 | while me._noutstand: M.select() | |
170 | ||
3c8803fa | 171 | def _resolved(me, host, cname, addr): |
ef7d7afb MW |
172 | """Callback function: remember that ADDRs are the addresses for HOST.""" |
173 | if not addr: | |
660564a1 MW |
174 | host.failed('(unknown failure)') |
175 | else: | |
3c8803fa | 176 | if cname is not None: host.name = cname |
cc72e4b3 | 177 | for a in addr: host.addaddr('INET', a) |
660564a1 MW |
178 | host._resolv = None |
179 | me._noutstand -= 1 | |
6005ef9b | 180 | |
ad367891 MW |
181 | ## Select a bulk resolver. Currently, there's only one choice. |
182 | BulkResolver = BresBulkResolver | |
183 | ||
6005ef9b MW |
184 | ###-------------------------------------------------------------------------- |
185 | ### The configuration parser. | |
186 | ||
b7e5aa06 MW |
187 | ## Match a comment or empty line. |
188 | RX_COMMENT = RX.compile(r'(?x) ^ \s* (?: $ | [;#])') | |
189 | ||
190 | ## Match a section group header. | |
191 | RX_GRPHDR = RX.compile(r'(?x) ^ \s* \[ (.*) \] \s* $') | |
192 | ||
193 | ## Match an assignment line. | |
194 | RX_ASSGN = RX.compile(r'''(?x) ^ | |
195 | ([^\s:=] (?: [^:=]* [^\s:=])?) | |
196 | \s* [:=] \s* | |
197 | (| \S | \S.*\S) | |
198 | \s* $''') | |
199 | ||
200 | ## Match a continuation line. | |
201 | RX_CONT = RX.compile(r'''(?x) ^ \s+ | |
202 | (| \S | \S.*\S) | |
203 | \s* $''') | |
204 | ||
6005ef9b | 205 | ## Match a $(VAR) configuration variable reference; group 1 is the VAR. |
2d51bc9f | 206 | RX_REF = RX.compile(r'(?x) \$ \( ([^)]+) \)') |
6005ef9b | 207 | |
ef7d7afb MW |
208 | ## Match a $FLAGS[HOST] name resolution reference; group 1 are the flags; |
209 | ## group 2 is the HOST. | |
97567475 | 210 | RX_RESOLVE = RX.compile(r'(?x) \$ ([46*]*) \[ ([^]]+) \]') |
6005ef9b | 211 | |
1c4623dd | 212 | class ConfigSyntaxError (ExpectedError): |
b7e5aa06 MW |
213 | def __init__(me, fname, lno, msg): |
214 | me.fname = fname | |
215 | me.lno = lno | |
216 | me.msg = msg | |
217 | def __str__(me): | |
218 | return '%s:%d: %s' % (me.fname, me.lno, me.msg) | |
219 | ||
bd3db76c MW |
220 | def _fmt_path(path): |
221 | return ' -> '.join(["`%s'" % hop for hop in path]) | |
222 | ||
1c4623dd | 223 | class AmbiguousOptionError (ExpectedError): |
bd3db76c MW |
224 | def __init__(me, key, patha, vala, pathb, valb): |
225 | me.key = key | |
226 | me.patha, me.vala = patha, vala | |
227 | me.pathb, me.valb = pathb, valb | |
228 | def __str__(me): | |
229 | return "Ambiguous answer resolving key `%s': " \ | |
230 | "path %s yields `%s' but %s yields `%s'" % \ | |
231 | (me.key, _fmt_path(me.patha), me.vala, _fmt_path(me.pathb), me.valb) | |
232 | ||
1c4623dd | 233 | class InheritanceCycleError (ExpectedError): |
bd3db76c MW |
234 | def __init__(me, key, path): |
235 | me.key = key | |
236 | me.path = path | |
237 | def __str__(me): | |
238 | return "Found a cycle %s looking up key `%s'" % \ | |
239 | (_fmt_path(me.path), me.key) | |
240 | ||
1c4623dd | 241 | class MissingSectionException (ExpectedError): |
e3ec3a3a | 242 | def __init__(me, sec): |
260dce8e | 243 | me.sec = sec |
e3ec3a3a MW |
244 | def __str__(me): |
245 | return "Section `%s' not found" % (me.sec) | |
246 | ||
1c4623dd | 247 | class MissingKeyException (ExpectedError): |
bd3db76c MW |
248 | def __init__(me, sec, key): |
249 | me.sec = sec | |
250 | me.key = key | |
251 | def __str__(me): | |
252 | return "Key `%s' not found in section `%s'" % (me.key, me.sec) | |
253 | ||
e3ec3a3a MW |
254 | class ConfigSection (object): |
255 | """ | |
256 | A section in a configuration parser. | |
257 | ||
258 | This is where a lot of the nitty-gritty stuff actually happens. The | |
259 | `MyConfigParser' knows a lot about the internals of this class, which saves | |
260 | on building a complicated interface. | |
261 | """ | |
262 | ||
263 | def __init__(me, name, cp): | |
264 | """Initialize a new, empty section with a given NAME and parent CP.""" | |
886350e8 MW |
265 | |
266 | ## The cache maps item keys to entries, which consist of a pair of | |
267 | ## objects. There are four possible states for a cache entry: | |
268 | ## | |
269 | ## * missing -- there is no entry at all with this key, so we must | |
270 | ## search for it; | |
271 | ## | |
272 | ## * None, None -- we are actively trying to resolve this key, so if we | |
273 | ## encounter this state, we have found a cycle in the inheritance | |
274 | ## graph; | |
275 | ## | |
276 | ## * None, [] -- we know that this key isn't reachable through any of | |
277 | ## our parents; | |
278 | ## | |
279 | ## * VALUE, PATH -- we know that the key resolves to VALUE, along the | |
280 | ## PATH from us (exclusive) to the defining parent (inclusive). | |
e3ec3a3a MW |
281 | me.name = name |
282 | me._itemmap = dict() | |
886350e8 | 283 | me._cache = dict() |
e3ec3a3a MW |
284 | me._cp = cp |
285 | ||
286 | def _expand(me, string, resolvep): | |
287 | """ | |
ef7d7afb | 288 | Expands $(...) and (optionally) $FLAGS[...] placeholders in STRING. |
e3ec3a3a MW |
289 | |
290 | RESOLVEP is a boolean switch: do we bother to tax the resolver or not? | |
291 | This is turned off by MyConfigParser's resolve() method while it's | |
292 | collecting hostnames to be resolved. | |
293 | """ | |
ef7d7afb | 294 | string = RX_REF.sub(lambda m: me.get(m.group(1), resolvep), string) |
e3ec3a3a | 295 | if resolvep: |
ef7d7afb MW |
296 | string = RX_RESOLVE.sub( |
297 | lambda m: ' '.join(me._cp._resolver.lookup(m.group(2), m.group(1))), | |
298 | string) | |
e3ec3a3a MW |
299 | return string |
300 | ||
4251f8ad MW |
301 | def _parents(me): |
302 | """Yield this section's parents.""" | |
303 | try: names = me._itemmap['@inherit'] | |
304 | except KeyError: return | |
305 | for name in names.replace(',', ' ').split(): | |
306 | yield me._cp.section(name) | |
307 | ||
886350e8 | 308 | def _get(me, key, path = None): |
e3ec3a3a MW |
309 | """ |
310 | Low-level option-fetching method. | |
311 | ||
312 | Fetch the value for the named KEY in this section, or maybe (recursively) | |
313 | a section which it inherits from. | |
314 | ||
315 | Returns a pair VALUE, PATH. The value is not expanded; nor do we check | |
316 | for the special `name' key. The caller is expected to do these things. | |
317 | Returns None if no value could be found. | |
318 | """ | |
319 | ||
886350e8 | 320 | ## If we weren't given a path, then we'd better make one. |
e3ec3a3a MW |
321 | if path is None: path = [] |
322 | ||
323 | ## Extend the path to cover us, but remember to remove us again when | |
324 | ## we've finished. If we need to pass the current path back upwards, | |
325 | ## then remember to take a copy. | |
326 | path.append(me.name) | |
327 | try: | |
328 | ||
886350e8 MW |
329 | ## If we've been this way before on another pass through then return the |
330 | ## value we found then. If we're still thinking about it then we've | |
331 | ## found a cycle. | |
332 | try: v, p = me._cache[key] | |
e3ec3a3a MW |
333 | except KeyError: pass |
334 | else: | |
886350e8 MW |
335 | if p is None: raise InheritanceCycleError(key, path[:]) |
336 | else: return v, path + p | |
e3ec3a3a MW |
337 | |
338 | ## See whether the answer is ready waiting for us. | |
339 | try: v = me._itemmap[key] | |
340 | except KeyError: pass | |
886350e8 MW |
341 | else: |
342 | p = path[:] | |
343 | me._cache[key] = v, [] | |
344 | return v, p | |
e3ec3a3a | 345 | |
e3ec3a3a MW |
346 | ## Initially we have no idea. |
347 | value = None | |
886350e8 | 348 | winner = [] |
e3ec3a3a MW |
349 | |
350 | ## Go through our parents and ask them what they think. | |
886350e8 | 351 | me._cache[key] = None, None |
4251f8ad | 352 | for p in me._parents(): |
e3ec3a3a MW |
353 | |
354 | ## See whether we get an answer. If not, keep on going. | |
886350e8 | 355 | v, pp = p._get(key, path) |
e3ec3a3a MW |
356 | if v is None: continue |
357 | ||
358 | ## If we got an answer, check that it matches any previous ones. | |
359 | if value is None: | |
360 | value = v | |
361 | winner = pp | |
362 | elif value != v: | |
363 | raise AmbiguousOptionError(key, winner, value, pp, v) | |
364 | ||
365 | ## That's the best we could manage. | |
886350e8 | 366 | me._cache[key] = value, winner[len(path):] |
e3ec3a3a MW |
367 | return value, winner |
368 | ||
369 | finally: | |
370 | ## Remove us from the path again. | |
371 | path.pop() | |
372 | ||
373 | def get(me, key, resolvep = True): | |
374 | """ | |
375 | Retrieve the value of KEY from this section. | |
376 | """ | |
377 | ||
378 | ## Special handling for the `name' key. | |
379 | if key == 'name': | |
380 | value = me._itemmap.get('name', me.name) | |
7dd9d51f MW |
381 | elif key == '@inherits': |
382 | try: return me._itemmap['@inherits'] | |
383 | except KeyError: raise MissingKeyException(me.name, key) | |
e3ec3a3a MW |
384 | else: |
385 | value, _ = me._get(key) | |
386 | if value is None: | |
387 | raise MissingKeyException(me.name, key) | |
388 | ||
389 | ## Expand the value and return it. | |
390 | return me._expand(value, resolvep) | |
391 | ||
392 | def items(me, resolvep = True): | |
393 | """ | |
85341d9c | 394 | Yield a list of item names in the section. |
e3ec3a3a MW |
395 | """ |
396 | ||
397 | ## Initialize for a depth-first walk of the inheritance graph. | |
4063c2b5 | 398 | seen = { 'name': True } |
f417591a | 399 | visiting = { me.name: True } |
4251f8ad | 400 | stack = [me] |
e3ec3a3a MW |
401 | |
402 | ## Visit nodes, collecting their keys. Don't believe the values: | |
403 | ## resolving inheritance is too hard to do like this. | |
404 | while stack: | |
4251f8ad | 405 | sec = stack.pop() |
f417591a MW |
406 | for p in sec._parents(): |
407 | if p.name not in visiting: | |
408 | stack.append(p); visiting[p.name] = True | |
e3ec3a3a | 409 | |
7dd9d51f | 410 | for key in sec._itemmap.iterkeys(): seen[key] = None |
e3ec3a3a | 411 | |
e3ec3a3a | 412 | ## And we're done. |
6e5794ef | 413 | return seen.iterkeys() |
e3ec3a3a | 414 | |
b7e5aa06 | 415 | class MyConfigParser (object): |
6005ef9b MW |
416 | """ |
417 | A more advanced configuration parser. | |
418 | ||
b7e5aa06 | 419 | This has four major enhancements over the standard ConfigParser which are |
6005ef9b MW |
420 | relevant to us. |
421 | ||
422 | * It recognizes `@inherits' keys and follows them when expanding a | |
423 | value. | |
424 | ||
425 | * It recognizes `$(VAR)' references to configuration variables during | |
426 | expansion and processes them correctly. | |
427 | ||
ef7d7afb | 428 | * It recognizes `$FLAGS[HOST]' name-resolver requests and handles them |
97567475 MW |
429 | correctly. FLAGS consists of characters `4' (IPv4 addresses), `6' |
430 | (IPv6 addresses), and `*' (all, space-separated, rather than just the | |
431 | first). | |
6005ef9b | 432 | |
b7e5aa06 MW |
433 | * Its parsing behaviour is well-defined. |
434 | ||
6005ef9b MW |
435 | Use: |
436 | ||
b7e5aa06 | 437 | 1. Call parse(FILENAME) to slurp in the configuration data. |
6005ef9b MW |
438 | |
439 | 2. Call resolve() to collect the hostnames which need to be resolved and | |
440 | actually do the name resolution. | |
441 | ||
e3ec3a3a MW |
442 | 3. Call sections() to get a list of the configuration sections, or |
443 | section(NAME) to find a named section. | |
444 | ||
445 | 4. Call get(ITEM) on a section to collect the results, or items() to | |
6005ef9b MW |
446 | iterate over them. |
447 | """ | |
448 | ||
449 | def __init__(me): | |
450 | """ | |
451 | Initialize a new, empty configuration parser. | |
452 | """ | |
b7e5aa06 | 453 | me._sectmap = dict() |
6005ef9b MW |
454 | me._resolver = BulkResolver() |
455 | ||
b7e5aa06 MW |
456 | def parse(me, f): |
457 | """ | |
458 | Parse configuration from a file F. | |
459 | """ | |
460 | ||
461 | ## Initial parser state. | |
462 | sect = None | |
463 | key = None | |
464 | val = None | |
465 | lno = 0 | |
466 | ||
467 | ## An unpleasant hack. Python makes it hard to capture a value in a | |
468 | ## variable and examine it in a single action, and this is the best that | |
469 | ## I came up with. | |
470 | m = [None] | |
471 | def match(rx): m[0] = rx.match(line); return m[0] | |
472 | ||
473 | ## Commit a key's value when we've determined that there are no further | |
474 | ## continuation lines. | |
475 | def flush(): | |
e3ec3a3a | 476 | if key is not None: sect._itemmap[key] = val.getvalue() |
b7e5aa06 MW |
477 | |
478 | ## Work through all of the input lines. | |
479 | for line in f: | |
480 | lno += 1 | |
481 | ||
482 | if match(RX_COMMENT): | |
483 | ## A comment or a blank line. Nothing doing. (This means that we | |
484 | ## leave out blank lines which look like they might be continuation | |
485 | ## lines.) | |
486 | ||
487 | pass | |
488 | ||
489 | elif match(RX_GRPHDR): | |
490 | ## A section header. Flush out any previous value and set up the new | |
491 | ## group. | |
492 | ||
493 | flush() | |
494 | name = m[0].group(1) | |
495 | try: sect = me._sectmap[name] | |
e3ec3a3a | 496 | except KeyError: sect = me._sectmap[name] = ConfigSection(name, me) |
b7e5aa06 MW |
497 | key = None |
498 | ||
499 | elif match(RX_ASSGN): | |
500 | ## A new assignment. Flush out the old one, and set up to store this | |
501 | ## one. | |
502 | ||
503 | if sect is None: | |
504 | raise ConfigSyntaxError(f.name, lno, 'no active section to update') | |
505 | flush() | |
506 | key = m[0].group(1) | |
507 | val = StringIO(); val.write(m[0].group(2)) | |
508 | ||
509 | elif match(RX_CONT): | |
510 | ## A continuation line. Accumulate the value. | |
511 | ||
512 | if key is None: | |
513 | raise ConfigSyntaxError(f.name, lno, 'no config value to continue') | |
514 | val.write('\n'); val.write(m[0].group(1)) | |
515 | ||
516 | else: | |
517 | ## Something else. | |
518 | ||
519 | raise ConfigSyntaxError(f.name, lno, 'incomprehensible line') | |
520 | ||
521 | ## Don't forget to commit any final value material. | |
522 | flush() | |
523 | ||
e3ec3a3a MW |
524 | def section(me, name): |
525 | """Return a ConfigSection with the given NAME.""" | |
526 | try: return me._sectmap[name] | |
527 | except KeyError: raise MissingSectionException(name) | |
528 | ||
b7e5aa06 | 529 | def sections(me): |
e3ec3a3a MW |
530 | """Yield the known sections.""" |
531 | return me._sectmap.itervalues() | |
b7e5aa06 | 532 | |
6005ef9b MW |
533 | def resolve(me): |
534 | """ | |
535 | Works out all of the hostnames which need resolving and resolves them. | |
536 | ||
537 | Until you call this, attempts to fetch configuration items which need to | |
538 | resolve hostnames will fail! | |
539 | """ | |
e3ec3a3a | 540 | for sec in me.sections(): |
85341d9c MW |
541 | for key in sec.items(): |
542 | value = sec.get(key, resolvep = False) | |
2d51bc9f | 543 | for match in RX_RESOLVE.finditer(value): |
ef7d7afb | 544 | me._resolver.prepare(match.group(2)) |
6005ef9b MW |
545 | me._resolver.run() |
546 | ||
6005ef9b MW |
547 | ###-------------------------------------------------------------------------- |
548 | ### Command-line handling. | |
549 | ||
550 | def inputiter(things): | |
551 | """ | |
552 | Iterate over command-line arguments, returning corresponding open files. | |
553 | ||
554 | If none were given, or one is `-', assume standard input; if one is a | |
555 | directory, scan it for files other than backups; otherwise return the | |
556 | opened files. | |
557 | """ | |
558 | ||
559 | if not things: | |
560 | if OS.isatty(stdin.fileno()): | |
561 | M.die('no input given, and stdin is a terminal') | |
562 | yield stdin | |
563 | else: | |
564 | for thing in things: | |
565 | if thing == '-': | |
566 | yield stdin | |
567 | elif OS.path.isdir(thing): | |
568 | for item in OS.listdir(thing): | |
569 | if item.endswith('~') or item.endswith('#'): | |
570 | continue | |
571 | name = OS.path.join(thing, item) | |
572 | if not OS.path.isfile(name): | |
573 | continue | |
574 | yield file(name) | |
575 | else: | |
576 | yield file(thing) | |
577 | ||
578 | def parse_options(argv = argv): | |
579 | """ | |
580 | Parse command-line options, returning a pair (OPTS, ARGS). | |
581 | """ | |
582 | M.ego(argv[0]) | |
583 | op = OptionParser(usage = '%prog [-c CDB] INPUT...', | |
584 | version = '%%prog (tripe, version %s)' % VERSION) | |
585 | op.add_option('-c', '--cdb', metavar = 'CDB', | |
586 | dest = 'cdbfile', default = None, | |
587 | help = 'Compile output into a CDB file.') | |
588 | opts, args = op.parse_args(argv) | |
589 | return opts, args | |
590 | ||
591 | ###-------------------------------------------------------------------------- | |
592 | ### Main code. | |
593 | ||
594 | def getconf(args): | |
595 | """ | |
596 | Read the configuration files and return the accumulated result. | |
597 | ||
598 | We make sure that all hostnames have been properly resolved. | |
599 | """ | |
600 | conf = MyConfigParser() | |
601 | for f in inputiter(args): | |
b7e5aa06 | 602 | conf.parse(f) |
6005ef9b MW |
603 | conf.resolve() |
604 | return conf | |
605 | ||
606 | def output(conf, cdb): | |
607 | """ | |
608 | Output the configuration information CONF to the database CDB. | |
609 | ||
610 | This is where the special `user' and `auto' database entries get set. | |
611 | """ | |
612 | auto = [] | |
e3ec3a3a MW |
613 | for sec in sorted(conf.sections(), key = lambda sec: sec.name): |
614 | if sec.name.startswith('@'): | |
6005ef9b | 615 | continue |
e3ec3a3a MW |
616 | elif sec.name.startswith('$'): |
617 | label = sec.name | |
6005ef9b | 618 | else: |
e3ec3a3a | 619 | label = 'P%s' % sec.name |
fd1ba90c MW |
620 | try: a = sec.get('auto') |
621 | except MissingKeyException: pass | |
622 | else: | |
623 | if a in ('y', 'yes', 't', 'true', '1', 'on'): auto.append(sec.name) | |
624 | try: u = sec.get('user') | |
625 | except MissingKeyException: pass | |
626 | else: cdb.add('U%s' % u) | |
6090fc43 | 627 | url = M.URLEncode(semip = True) |
85341d9c | 628 | for key in sorted(sec.items()): |
6005ef9b | 629 | if not key.startswith('@'): |
6090fc43 | 630 | url.encode(key, sec.get(key)) |
6005ef9b MW |
631 | cdb.add(label, url.result) |
632 | cdb.add('%AUTO', ' '.join(auto)) | |
633 | cdb.finish() | |
634 | ||
635 | def main(): | |
636 | """Main program.""" | |
637 | opts, args = parse_options() | |
638 | if opts.cdbfile: | |
639 | cdb = CDB.cdbmake(opts.cdbfile, opts.cdbfile + '.new') | |
640 | else: | |
641 | cdb = CDBFake() | |
1c4623dd MW |
642 | try: |
643 | conf = getconf(args[1:]) | |
644 | output(conf, cdb) | |
645 | except ExpectedError, e: | |
646 | M.moan(str(e)) | |
647 | exit(2) | |
6005ef9b MW |
648 | |
649 | if __name__ == '__main__': | |
650 | main() | |
651 | ||
652 | ###----- That's all, folks -------------------------------------------------- |