Show More
@@ -1,697 +1,708 b'' | |||
|
1 | 1 | # chgserver.py - command server extension for cHg |
|
2 | 2 | # |
|
3 | 3 | # Copyright 2011 Yuya Nishihara <yuya@tcha.org> |
|
4 | 4 | # |
|
5 | 5 | # This software may be used and distributed according to the terms of the |
|
6 | 6 | # GNU General Public License version 2 or any later version. |
|
7 | 7 | |
|
8 | 8 | """command server extension for cHg (EXPERIMENTAL) |
|
9 | 9 | |
|
10 | 10 | 'S' channel (read/write) |
|
11 | 11 | propagate ui.system() request to client |
|
12 | 12 | |
|
13 | 13 | 'attachio' command |
|
14 | 14 | attach client's stdio passed by sendmsg() |
|
15 | 15 | |
|
16 | 16 | 'chdir' command |
|
17 | 17 | change current directory |
|
18 | 18 | |
|
19 | 19 | 'getpager' command |
|
20 | 20 | checks if pager is enabled and which pager should be executed |
|
21 | 21 | |
|
22 | 22 | 'setenv' command |
|
23 | 23 | replace os.environ completely |
|
24 | 24 | |
|
25 | 25 | 'setumask' command |
|
26 | 26 | set umask |
|
27 | 27 | |
|
28 | 28 | 'validate' command |
|
29 | 29 | reload the config and check if the server is up to date |
|
30 | 30 | |
|
31 | 31 | Config |
|
32 | 32 | ------ |
|
33 | 33 | |
|
34 | 34 | :: |
|
35 | 35 | |
|
36 | 36 | [chgserver] |
|
37 | 37 | idletimeout = 3600 # seconds, after which an idle server will exit |
|
38 | 38 | skiphash = False # whether to skip config or env change checks |
|
39 | 39 | """ |
|
40 | 40 | |
|
41 | 41 | from __future__ import absolute_import |
|
42 | 42 | |
|
43 | 43 | import SocketServer |
|
44 | 44 | import errno |
|
45 | 45 | import gc |
|
46 | 46 | import inspect |
|
47 | 47 | import os |
|
48 | 48 | import re |
|
49 | 49 | import struct |
|
50 | 50 | import sys |
|
51 | 51 | import threading |
|
52 | 52 | import time |
|
53 | 53 | import traceback |
|
54 | 54 | |
|
55 | 55 | from mercurial.i18n import _ |
|
56 | 56 | |
|
57 | 57 | from mercurial import ( |
|
58 | 58 | cmdutil, |
|
59 | 59 | commands, |
|
60 | 60 | commandserver, |
|
61 | 61 | dispatch, |
|
62 | 62 | error, |
|
63 | 63 | extensions, |
|
64 | 64 | osutil, |
|
65 | 65 | util, |
|
66 | 66 | ) |
|
67 | 67 | |
|
68 | 68 | # Note for extension authors: ONLY specify testedwith = 'internal' for |
|
69 | 69 | # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
|
70 | 70 | # be specifying the version(s) of Mercurial they are tested with, or |
|
71 | 71 | # leave the attribute unspecified. |
|
72 | 72 | testedwith = 'internal' |
|
73 | 73 | |
|
74 | 74 | _log = commandserver.log |
|
75 | 75 | |
|
76 | 76 | def _hashlist(items): |
|
77 | 77 | """return sha1 hexdigest for a list""" |
|
78 | 78 | return util.sha1(str(items)).hexdigest() |
|
79 | 79 | |
|
80 | 80 | # sensitive config sections affecting confighash |
|
81 | 81 | _configsections = [ |
|
82 | 82 | 'extdiff', # uisetup will register new commands |
|
83 | 83 | 'extensions', |
|
84 | 84 | ] |
|
85 | 85 | |
|
86 | 86 | # sensitive environment variables affecting confighash |
|
87 | 87 | _envre = re.compile(r'''\A(?: |
|
88 | 88 | CHGHG |
|
89 | 89 | |HG.* |
|
90 | 90 | |LANG(?:UAGE)? |
|
91 | 91 | |LC_.* |
|
92 | 92 | |LD_.* |
|
93 | 93 | |PATH |
|
94 | 94 | |PYTHON.* |
|
95 | 95 | |TERM(?:INFO)? |
|
96 | 96 | |TZ |
|
97 | 97 | )\Z''', re.X) |
|
98 | 98 | |
|
99 | 99 | def _confighash(ui): |
|
100 | 100 | """return a quick hash for detecting config/env changes |
|
101 | 101 | |
|
102 | 102 | confighash is the hash of sensitive config items and environment variables. |
|
103 | 103 | |
|
104 | 104 | for chgserver, it is designed that once confighash changes, the server is |
|
105 | 105 | not qualified to serve its client and should redirect the client to a new |
|
106 | 106 | server. different from mtimehash, confighash change will not mark the |
|
107 | 107 | server outdated and exit since the user can have different configs at the |
|
108 | 108 | same time. |
|
109 | 109 | """ |
|
110 | 110 | sectionitems = [] |
|
111 | 111 | for section in _configsections: |
|
112 | 112 | sectionitems.append(ui.configitems(section)) |
|
113 | 113 | sectionhash = _hashlist(sectionitems) |
|
114 | 114 | envitems = [(k, v) for k, v in os.environ.iteritems() if _envre.match(k)] |
|
115 | 115 | envhash = _hashlist(sorted(envitems)) |
|
116 | 116 | return sectionhash[:6] + envhash[:6] |
|
117 | 117 | |
|
118 | 118 | def _getmtimepaths(ui): |
|
119 | 119 | """get a list of paths that should be checked to detect change |
|
120 | 120 | |
|
121 | 121 | The list will include: |
|
122 | 122 | - extensions (will not cover all files for complex extensions) |
|
123 | 123 | - mercurial/__version__.py |
|
124 | 124 | - python binary |
|
125 | 125 | """ |
|
126 | 126 | modules = [m for n, m in extensions.extensions(ui)] |
|
127 | 127 | try: |
|
128 | 128 | from mercurial import __version__ |
|
129 | 129 | modules.append(__version__) |
|
130 | 130 | except ImportError: |
|
131 | 131 | pass |
|
132 | 132 | files = [sys.executable] |
|
133 | 133 | for m in modules: |
|
134 | 134 | try: |
|
135 | 135 | files.append(inspect.getabsfile(m)) |
|
136 | 136 | except TypeError: |
|
137 | 137 | pass |
|
138 | 138 | return sorted(set(files)) |
|
139 | 139 | |
|
140 | 140 | def _mtimehash(paths): |
|
141 | 141 | """return a quick hash for detecting file changes |
|
142 | 142 | |
|
143 | 143 | mtimehash calls stat on given paths and calculate a hash based on size and |
|
144 | 144 | mtime of each file. mtimehash does not read file content because reading is |
|
145 | 145 | expensive. therefore it's not 100% reliable for detecting content changes. |
|
146 | 146 | it's possible to return different hashes for same file contents. |
|
147 | 147 | it's also possible to return a same hash for different file contents for |
|
148 | 148 | some carefully crafted situation. |
|
149 | 149 | |
|
150 | 150 | for chgserver, it is designed that once mtimehash changes, the server is |
|
151 | 151 | considered outdated immediately and should no longer provide service. |
|
152 | 152 | """ |
|
153 | 153 | def trystat(path): |
|
154 | 154 | try: |
|
155 | 155 | st = os.stat(path) |
|
156 | 156 | return (st.st_mtime, st.st_size) |
|
157 | 157 | except OSError: |
|
158 | 158 | # could be ENOENT, EPERM etc. not fatal in any case |
|
159 | 159 | pass |
|
160 | 160 | return _hashlist(map(trystat, paths))[:12] |
|
161 | 161 | |
|
162 | 162 | class hashstate(object): |
|
163 | 163 | """a structure storing confighash, mtimehash, paths used for mtimehash""" |
|
164 | 164 | def __init__(self, confighash, mtimehash, mtimepaths): |
|
165 | 165 | self.confighash = confighash |
|
166 | 166 | self.mtimehash = mtimehash |
|
167 | 167 | self.mtimepaths = mtimepaths |
|
168 | 168 | |
|
169 | 169 | @staticmethod |
|
170 | 170 | def fromui(ui, mtimepaths=None): |
|
171 | 171 | if mtimepaths is None: |
|
172 | 172 | mtimepaths = _getmtimepaths(ui) |
|
173 | 173 | confighash = _confighash(ui) |
|
174 | 174 | mtimehash = _mtimehash(mtimepaths) |
|
175 | 175 | _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash)) |
|
176 | 176 | return hashstate(confighash, mtimehash, mtimepaths) |
|
177 | 177 | |
|
178 | 178 | # copied from hgext/pager.py:uisetup() |
|
179 | 179 | def _setuppagercmd(ui, options, cmd): |
|
180 | 180 | if not ui.formatted(): |
|
181 | 181 | return |
|
182 | 182 | |
|
183 | 183 | p = ui.config("pager", "pager", os.environ.get("PAGER")) |
|
184 | 184 | usepager = False |
|
185 | 185 | always = util.parsebool(options['pager']) |
|
186 | 186 | auto = options['pager'] == 'auto' |
|
187 | 187 | |
|
188 | 188 | if not p: |
|
189 | 189 | pass |
|
190 | 190 | elif always: |
|
191 | 191 | usepager = True |
|
192 | 192 | elif not auto: |
|
193 | 193 | usepager = False |
|
194 | 194 | else: |
|
195 | 195 | attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
|
196 | 196 | attend = ui.configlist('pager', 'attend', attended) |
|
197 | 197 | ignore = ui.configlist('pager', 'ignore') |
|
198 | 198 | cmds, _ = cmdutil.findcmd(cmd, commands.table) |
|
199 | 199 | |
|
200 | 200 | for cmd in cmds: |
|
201 | 201 | var = 'attend-%s' % cmd |
|
202 | 202 | if ui.config('pager', var): |
|
203 | 203 | usepager = ui.configbool('pager', var) |
|
204 | 204 | break |
|
205 | 205 | if (cmd in attend or |
|
206 | 206 | (cmd not in ignore and not attend)): |
|
207 | 207 | usepager = True |
|
208 | 208 | break |
|
209 | 209 | |
|
210 | 210 | if usepager: |
|
211 | 211 | ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
|
212 | 212 | ui.setconfig('ui', 'interactive', False, 'pager') |
|
213 | 213 | return p |
|
214 | 214 | |
|
215 | 215 | _envvarre = re.compile(r'\$[a-zA-Z_]+') |
|
216 | 216 | |
|
217 | 217 | def _clearenvaliases(cmdtable): |
|
218 | 218 | """Remove stale command aliases referencing env vars; variable expansion |
|
219 | 219 | is done at dispatch.addaliases()""" |
|
220 | 220 | for name, tab in cmdtable.items(): |
|
221 | 221 | cmddef = tab[0] |
|
222 | 222 | if (isinstance(cmddef, dispatch.cmdalias) and |
|
223 | 223 | not cmddef.definition.startswith('!') and # shell alias |
|
224 | 224 | _envvarre.search(cmddef.definition)): |
|
225 | 225 | del cmdtable[name] |
|
226 | 226 | |
|
227 | 227 | def _newchgui(srcui, csystem): |
|
228 | 228 | class chgui(srcui.__class__): |
|
229 | 229 | def __init__(self, src=None): |
|
230 | 230 | super(chgui, self).__init__(src) |
|
231 | 231 | if src: |
|
232 | 232 | self._csystem = getattr(src, '_csystem', csystem) |
|
233 | 233 | else: |
|
234 | 234 | self._csystem = csystem |
|
235 | 235 | |
|
236 | 236 | def system(self, cmd, environ=None, cwd=None, onerr=None, |
|
237 | 237 | errprefix=None): |
|
238 | 238 | # fallback to the original system method if the output needs to be |
|
239 | 239 | # captured (to self._buffers), or the output stream is not stdout |
|
240 | 240 | # (e.g. stderr, cStringIO), because the chg client is not aware of |
|
241 | 241 | # these situations and will behave differently (write to stdout). |
|
242 | 242 | if (any(s[1] for s in self._bufferstates) |
|
243 | 243 | or not util.safehasattr(self.fout, 'fileno') |
|
244 | 244 | or self.fout.fileno() != sys.stdout.fileno()): |
|
245 | 245 | return super(chgui, self).system(cmd, environ, cwd, onerr, |
|
246 | 246 | errprefix) |
|
247 | 247 | # copied from mercurial/util.py:system() |
|
248 | 248 | self.flush() |
|
249 | 249 | def py2shell(val): |
|
250 | 250 | if val is None or val is False: |
|
251 | 251 | return '0' |
|
252 | 252 | if val is True: |
|
253 | 253 | return '1' |
|
254 | 254 | return str(val) |
|
255 | 255 | env = os.environ.copy() |
|
256 | 256 | if environ: |
|
257 | 257 | env.update((k, py2shell(v)) for k, v in environ.iteritems()) |
|
258 | 258 | env['HG'] = util.hgexecutable() |
|
259 | 259 | rc = self._csystem(cmd, env, cwd) |
|
260 | 260 | if rc and onerr: |
|
261 | 261 | errmsg = '%s %s' % (os.path.basename(cmd.split(None, 1)[0]), |
|
262 | 262 | util.explainexit(rc)[0]) |
|
263 | 263 | if errprefix: |
|
264 | 264 | errmsg = '%s: %s' % (errprefix, errmsg) |
|
265 | 265 | raise onerr(errmsg) |
|
266 | 266 | return rc |
|
267 | 267 | |
|
268 | 268 | return chgui(srcui) |
|
269 | 269 | |
|
270 | 270 | def _loadnewui(srcui, args): |
|
271 | 271 | newui = srcui.__class__() |
|
272 | 272 | for a in ['fin', 'fout', 'ferr', 'environ']: |
|
273 | 273 | setattr(newui, a, getattr(srcui, a)) |
|
274 | 274 | if util.safehasattr(srcui, '_csystem'): |
|
275 | 275 | newui._csystem = srcui._csystem |
|
276 | 276 | |
|
277 | 277 | # internal config: extensions.chgserver |
|
278 | 278 | newui.setconfig('extensions', 'chgserver', |
|
279 | 279 | srcui.config('extensions', 'chgserver'), '--config') |
|
280 | 280 | |
|
281 | 281 | # command line args |
|
282 | 282 | args = args[:] |
|
283 | 283 | dispatch._parseconfig(newui, dispatch._earlygetopt(['--config'], args)) |
|
284 | 284 | |
|
285 | 285 | # stolen from tortoisehg.util.copydynamicconfig() |
|
286 | 286 | for section, name, value in srcui.walkconfig(): |
|
287 | 287 | source = srcui.configsource(section, name) |
|
288 | 288 | if ':' in source or source == '--config': |
|
289 | 289 | # path:line or command line |
|
290 | 290 | continue |
|
291 | 291 | if source == 'none': |
|
292 | 292 | # ui.configsource returns 'none' by default |
|
293 | 293 | source = '' |
|
294 | 294 | newui.setconfig(section, name, value, source) |
|
295 | 295 | |
|
296 | 296 | # load wd and repo config, copied from dispatch.py |
|
297 | 297 | cwds = dispatch._earlygetopt(['--cwd'], args) |
|
298 | 298 | cwd = cwds and os.path.realpath(cwds[-1]) or None |
|
299 | 299 | rpath = dispatch._earlygetopt(["-R", "--repository", "--repo"], args) |
|
300 | 300 | path, newlui = dispatch._getlocal(newui, rpath, wd=cwd) |
|
301 | 301 | |
|
302 | 302 | return (newui, newlui) |
|
303 | 303 | |
|
304 | 304 | class channeledsystem(object): |
|
305 | 305 | """Propagate ui.system() request in the following format: |
|
306 | 306 | |
|
307 | 307 | payload length (unsigned int), |
|
308 | 308 | cmd, '\0', |
|
309 | 309 | cwd, '\0', |
|
310 | 310 | envkey, '=', val, '\0', |
|
311 | 311 | ... |
|
312 | 312 | envkey, '=', val |
|
313 | 313 | |
|
314 | 314 | and waits: |
|
315 | 315 | |
|
316 | 316 | exitcode length (unsigned int), |
|
317 | 317 | exitcode (int) |
|
318 | 318 | """ |
|
319 | 319 | def __init__(self, in_, out, channel): |
|
320 | 320 | self.in_ = in_ |
|
321 | 321 | self.out = out |
|
322 | 322 | self.channel = channel |
|
323 | 323 | |
|
324 | 324 | def __call__(self, cmd, environ, cwd): |
|
325 | 325 | args = [util.quotecommand(cmd), os.path.abspath(cwd or '.')] |
|
326 | 326 | args.extend('%s=%s' % (k, v) for k, v in environ.iteritems()) |
|
327 | 327 | data = '\0'.join(args) |
|
328 | 328 | self.out.write(struct.pack('>cI', self.channel, len(data))) |
|
329 | 329 | self.out.write(data) |
|
330 | 330 | self.out.flush() |
|
331 | 331 | |
|
332 | 332 | length = self.in_.read(4) |
|
333 | 333 | length, = struct.unpack('>I', length) |
|
334 | 334 | if length != 4: |
|
335 | 335 | raise error.Abort(_('invalid response')) |
|
336 | 336 | rc, = struct.unpack('>i', self.in_.read(4)) |
|
337 | 337 | return rc |
|
338 | 338 | |
|
339 | 339 | _iochannels = [ |
|
340 | 340 | # server.ch, ui.fp, mode |
|
341 | 341 | ('cin', 'fin', 'rb'), |
|
342 | 342 | ('cout', 'fout', 'wb'), |
|
343 | 343 | ('cerr', 'ferr', 'wb'), |
|
344 | 344 | ] |
|
345 | 345 | |
|
346 | 346 | class chgcmdserver(commandserver.server): |
|
347 | 347 | def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress): |
|
348 | 348 | super(chgcmdserver, self).__init__( |
|
349 | 349 | _newchgui(ui, channeledsystem(fin, fout, 'S')), repo, fin, fout) |
|
350 | 350 | self.clientsock = sock |
|
351 | 351 | self._oldios = [] # original (self.ch, ui.fp, fd) before "attachio" |
|
352 | 352 | self.hashstate = hashstate |
|
353 | 353 | self.baseaddress = baseaddress |
|
354 | 354 | if hashstate is not None: |
|
355 | 355 | self.capabilities = self.capabilities.copy() |
|
356 | 356 | self.capabilities['validate'] = chgcmdserver.validate |
|
357 | 357 | |
|
358 | 358 | def cleanup(self): |
|
359 | 359 | # dispatch._runcatch() does not flush outputs if exception is not |
|
360 | 360 | # handled by dispatch._dispatch() |
|
361 | 361 | self.ui.flush() |
|
362 | 362 | self._restoreio() |
|
363 | 363 | |
|
364 | 364 | def attachio(self): |
|
365 | 365 | """Attach to client's stdio passed via unix domain socket; all |
|
366 | 366 | channels except cresult will no longer be used |
|
367 | 367 | """ |
|
368 | 368 | # tell client to sendmsg() with 1-byte payload, which makes it |
|
369 | 369 | # distinctive from "attachio\n" command consumed by client.read() |
|
370 | 370 | self.clientsock.sendall(struct.pack('>cI', 'I', 1)) |
|
371 | 371 | clientfds = osutil.recvfds(self.clientsock.fileno()) |
|
372 | 372 | _log('received fds: %r\n' % clientfds) |
|
373 | 373 | |
|
374 | 374 | ui = self.ui |
|
375 | 375 | ui.flush() |
|
376 | 376 | first = self._saveio() |
|
377 | 377 | for fd, (cn, fn, mode) in zip(clientfds, _iochannels): |
|
378 | 378 | assert fd > 0 |
|
379 | 379 | fp = getattr(ui, fn) |
|
380 | 380 | os.dup2(fd, fp.fileno()) |
|
381 | 381 | os.close(fd) |
|
382 | 382 | if not first: |
|
383 | 383 | continue |
|
384 | 384 | # reset buffering mode when client is first attached. as we want |
|
385 | 385 | # to see output immediately on pager, the mode stays unchanged |
|
386 | 386 | # when client re-attached. ferr is unchanged because it should |
|
387 | 387 | # be unbuffered no matter if it is a tty or not. |
|
388 | 388 | if fn == 'ferr': |
|
389 | 389 | newfp = fp |
|
390 | 390 | else: |
|
391 | 391 | # make it line buffered explicitly because the default is |
|
392 | 392 | # decided on first write(), where fout could be a pager. |
|
393 | 393 | if fp.isatty(): |
|
394 | 394 | bufsize = 1 # line buffered |
|
395 | 395 | else: |
|
396 | 396 | bufsize = -1 # system default |
|
397 | 397 | newfp = os.fdopen(fp.fileno(), mode, bufsize) |
|
398 | 398 | setattr(ui, fn, newfp) |
|
399 | 399 | setattr(self, cn, newfp) |
|
400 | 400 | |
|
401 | 401 | self.cresult.write(struct.pack('>i', len(clientfds))) |
|
402 | 402 | |
|
403 | 403 | def _saveio(self): |
|
404 | 404 | if self._oldios: |
|
405 | 405 | return False |
|
406 | 406 | ui = self.ui |
|
407 | 407 | for cn, fn, _mode in _iochannels: |
|
408 | 408 | ch = getattr(self, cn) |
|
409 | 409 | fp = getattr(ui, fn) |
|
410 | 410 | fd = os.dup(fp.fileno()) |
|
411 | 411 | self._oldios.append((ch, fp, fd)) |
|
412 | 412 | return True |
|
413 | 413 | |
|
414 | 414 | def _restoreio(self): |
|
415 | 415 | ui = self.ui |
|
416 | 416 | for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels): |
|
417 | 417 | newfp = getattr(ui, fn) |
|
418 | 418 | # close newfp while it's associated with client; otherwise it |
|
419 | 419 | # would be closed when newfp is deleted |
|
420 | 420 | if newfp is not fp: |
|
421 | 421 | newfp.close() |
|
422 | 422 | # restore original fd: fp is open again |
|
423 | 423 | os.dup2(fd, fp.fileno()) |
|
424 | 424 | os.close(fd) |
|
425 | 425 | setattr(self, cn, ch) |
|
426 | 426 | setattr(ui, fn, fp) |
|
427 | 427 | del self._oldios[:] |
|
428 | 428 | |
|
429 | 429 | def validate(self): |
|
430 | 430 | """Reload the config and check if the server is up to date |
|
431 | 431 | |
|
432 | 432 | Read a list of '\0' separated arguments. |
|
433 | 433 | Write a non-empty list of '\0' separated instruction strings or '\0' |
|
434 | 434 | if the list is empty. |
|
435 | 435 | An instruction string could be either: |
|
436 | 436 | - "unlink $path", the client should unlink the path to stop the |
|
437 | 437 | outdated server. |
|
438 | 438 | - "redirect $path", the client should attempt to connect to $path |
|
439 | 439 | first. If it does not work, start a new server. It implies |
|
440 | 440 | "reconnect". |
|
441 | 441 | - "exit $n", the client should exit directly with code n. |
|
442 | 442 | This may happen if we cannot parse the config. |
|
443 | 443 | - "reconnect", the client should close the connection and |
|
444 | 444 | reconnect. |
|
445 | 445 | If neither "reconnect" nor "redirect" is included in the instruction |
|
446 | 446 | list, the client can continue with this server after completing all |
|
447 | 447 | the instructions. |
|
448 | 448 | """ |
|
449 | 449 | args = self._readlist() |
|
450 | 450 | try: |
|
451 | 451 | self.ui, lui = _loadnewui(self.ui, args) |
|
452 | 452 | except error.ParseError as inst: |
|
453 | 453 | dispatch._formatparse(self.ui.warn, inst) |
|
454 | 454 | self.ui.flush() |
|
455 | 455 | self.cresult.write('exit 255') |
|
456 | 456 | return |
|
457 | 457 | newhash = hashstate.fromui(lui, self.hashstate.mtimepaths) |
|
458 | 458 | insts = [] |
|
459 | 459 | if newhash.mtimehash != self.hashstate.mtimehash: |
|
460 | 460 | addr = _hashaddress(self.baseaddress, self.hashstate.confighash) |
|
461 | 461 | insts.append('unlink %s' % addr) |
|
462 | 462 | # mtimehash is empty if one or more extensions fail to load. |
|
463 | 463 | # to be compatible with hg, still serve the client this time. |
|
464 | 464 | if self.hashstate.mtimehash: |
|
465 | 465 | insts.append('reconnect') |
|
466 | 466 | if newhash.confighash != self.hashstate.confighash: |
|
467 | 467 | addr = _hashaddress(self.baseaddress, newhash.confighash) |
|
468 | 468 | insts.append('redirect %s' % addr) |
|
469 | 469 | _log('validate: %s\n' % insts) |
|
470 | 470 | self.cresult.write('\0'.join(insts) or '\0') |
|
471 | 471 | |
|
472 | 472 | def chdir(self): |
|
473 | 473 | """Change current directory |
|
474 | 474 | |
|
475 | 475 | Note that the behavior of --cwd option is bit different from this. |
|
476 | 476 | It does not affect --config parameter. |
|
477 | 477 | """ |
|
478 | 478 | path = self._readstr() |
|
479 | 479 | if not path: |
|
480 | 480 | return |
|
481 | 481 | _log('chdir to %r\n' % path) |
|
482 | 482 | os.chdir(path) |
|
483 | 483 | |
|
484 | 484 | def setumask(self): |
|
485 | 485 | """Change umask""" |
|
486 | 486 | mask = struct.unpack('>I', self._read(4))[0] |
|
487 | 487 | _log('setumask %r\n' % mask) |
|
488 | 488 | os.umask(mask) |
|
489 | 489 | |
|
490 | 490 | def getpager(self): |
|
491 | 491 | """Read cmdargs and write pager command to r-channel if enabled |
|
492 | 492 | |
|
493 | 493 | If pager isn't enabled, this writes '\0' because channeledoutput |
|
494 | 494 | does not allow to write empty data. |
|
495 | 495 | """ |
|
496 | 496 | args = self._readlist() |
|
497 | 497 | try: |
|
498 | 498 | cmd, _func, args, options, _cmdoptions = dispatch._parse(self.ui, |
|
499 | 499 | args) |
|
500 | 500 | except (error.Abort, error.AmbiguousCommand, error.CommandError, |
|
501 | 501 | error.UnknownCommand): |
|
502 | 502 | cmd = None |
|
503 | 503 | options = {} |
|
504 | 504 | if not cmd or 'pager' not in options: |
|
505 | 505 | self.cresult.write('\0') |
|
506 | 506 | return |
|
507 | 507 | |
|
508 | 508 | pagercmd = _setuppagercmd(self.ui, options, cmd) |
|
509 | 509 | if pagercmd: |
|
510 | 510 | self.cresult.write(pagercmd) |
|
511 | 511 | else: |
|
512 | 512 | self.cresult.write('\0') |
|
513 | 513 | |
|
514 | 514 | def setenv(self): |
|
515 | 515 | """Clear and update os.environ |
|
516 | 516 | |
|
517 | 517 | Note that not all variables can make an effect on the running process. |
|
518 | 518 | """ |
|
519 | 519 | l = self._readlist() |
|
520 | 520 | try: |
|
521 | 521 | newenv = dict(s.split('=', 1) for s in l) |
|
522 | 522 | except ValueError: |
|
523 | 523 | raise ValueError('unexpected value in setenv request') |
|
524 | 524 | _log('setenv: %r\n' % sorted(newenv.keys())) |
|
525 | 525 | os.environ.clear() |
|
526 | 526 | os.environ.update(newenv) |
|
527 | 527 | _clearenvaliases(commands.table) |
|
528 | 528 | |
|
529 | 529 | capabilities = commandserver.server.capabilities.copy() |
|
530 | 530 | capabilities.update({'attachio': attachio, |
|
531 | 531 | 'chdir': chdir, |
|
532 | 532 | 'getpager': getpager, |
|
533 | 533 | 'setenv': setenv, |
|
534 | 534 | 'setumask': setumask}) |
|
535 | 535 | |
|
536 | 536 | # copied from mercurial/commandserver.py |
|
537 | 537 | class _requesthandler(SocketServer.StreamRequestHandler): |
|
538 | 538 | def handle(self): |
|
539 | 539 | # use a different process group from the master process, making this |
|
540 | 540 | # process pass kernel "is_current_pgrp_orphaned" check so signals like |
|
541 | 541 | # SIGTSTP, SIGTTIN, SIGTTOU are not ignored. |
|
542 | 542 | os.setpgid(0, 0) |
|
543 | 543 | ui = self.server.ui |
|
544 | 544 | repo = self.server.repo |
|
545 | 545 | sv = None |
|
546 | 546 | try: |
|
547 | 547 | sv = chgcmdserver(ui, repo, self.rfile, self.wfile, self.connection, |
|
548 | 548 | self.server.hashstate, self.server.baseaddress) |
|
549 | 549 | try: |
|
550 | 550 | sv.serve() |
|
551 | 551 | # handle exceptions that may be raised by command server. most of |
|
552 | 552 | # known exceptions are caught by dispatch. |
|
553 | 553 | except error.Abort as inst: |
|
554 | 554 | ui.warn(_('abort: %s\n') % inst) |
|
555 | 555 | except IOError as inst: |
|
556 | 556 | if inst.errno != errno.EPIPE: |
|
557 | 557 | raise |
|
558 | 558 | except KeyboardInterrupt: |
|
559 | 559 | pass |
|
560 | 560 | finally: |
|
561 | 561 | sv.cleanup() |
|
562 | 562 | except: # re-raises |
|
563 | 563 | # also write traceback to error channel. otherwise client cannot |
|
564 | 564 | # see it because it is written to server's stderr by default. |
|
565 | 565 | if sv: |
|
566 | 566 | cerr = sv.cerr |
|
567 | 567 | else: |
|
568 | 568 | cerr = commandserver.channeledoutput(self.wfile, 'e') |
|
569 | 569 | traceback.print_exc(file=cerr) |
|
570 | 570 | raise |
|
571 | 571 | finally: |
|
572 | 572 | # trigger __del__ since ForkingMixIn uses os._exit |
|
573 | 573 | gc.collect() |
|
574 | 574 | |
|
575 | 575 | def _tempaddress(address): |
|
576 | 576 | return '%s.%d.tmp' % (address, os.getpid()) |
|
577 | 577 | |
|
578 | 578 | def _hashaddress(address, hashstr): |
|
579 | 579 | return '%s-%s' % (address, hashstr) |
|
580 | 580 | |
|
581 | 581 | class AutoExitMixIn: # use old-style to comply with SocketServer design |
|
582 | 582 | lastactive = time.time() |
|
583 | 583 | idletimeout = 3600 # default 1 hour |
|
584 | 584 | |
|
585 | 585 | def startautoexitthread(self): |
|
586 | 586 | # note: the auto-exit check here is cheap enough to not use a thread, |
|
587 | 587 | # be done in serve_forever. however SocketServer is hook-unfriendly, |
|
588 | 588 | # you simply cannot hook serve_forever without copying a lot of code. |
|
589 | 589 | # besides, serve_forever's docstring suggests using thread. |
|
590 | 590 | thread = threading.Thread(target=self._autoexitloop) |
|
591 | 591 | thread.daemon = True |
|
592 | 592 | thread.start() |
|
593 | 593 | |
|
594 | 594 | def _autoexitloop(self, interval=1): |
|
595 | 595 | while True: |
|
596 | 596 | time.sleep(interval) |
|
597 | 597 | if not self.issocketowner(): |
|
598 | 598 | _log('%s is not owned, exiting.\n' % self.server_address) |
|
599 | 599 | break |
|
600 | 600 | if time.time() - self.lastactive > self.idletimeout: |
|
601 | 601 | _log('being idle too long. exiting.\n') |
|
602 | 602 | break |
|
603 | 603 | self.shutdown() |
|
604 | 604 | |
|
605 | 605 | def process_request(self, request, address): |
|
606 | 606 | self.lastactive = time.time() |
|
607 | 607 | return SocketServer.ForkingMixIn.process_request( |
|
608 | 608 | self, request, address) |
|
609 | 609 | |
|
610 | 610 | def server_bind(self): |
|
611 | 611 | # use a unique temp address so we can stat the file and do ownership |
|
612 | 612 | # check later |
|
613 | 613 | tempaddress = _tempaddress(self.server_address) |
|
614 | self.socket.bind(tempaddress) | |
|
615 | self._socketstat = os.stat(tempaddress) | |
|
614 | # use relative path instead of full path at bind() if possible, since | |
|
615 | # AF_UNIX path has very small length limit (107 chars) on common | |
|
616 | # platforms (see sys/un.h) | |
|
617 | dirname, basename = os.path.split(tempaddress) | |
|
618 | bakwdfd = None | |
|
619 | if dirname: | |
|
620 | bakwdfd = os.open('.', os.O_DIRECTORY) | |
|
621 | os.chdir(dirname) | |
|
622 | self.socket.bind(basename) | |
|
623 | self._socketstat = os.stat(basename) | |
|
616 | 624 | # rename will replace the old socket file if exists atomically. the |
|
617 | 625 | # old server will detect ownership change and exit. |
|
618 |
util.rename( |
|
|
626 | util.rename(basename, self.server_address) | |
|
627 | if bakwdfd: | |
|
628 | os.fchdir(bakwdfd) | |
|
629 | os.close(bakwdfd) | |
|
619 | 630 | |
|
620 | 631 | def issocketowner(self): |
|
621 | 632 | try: |
|
622 | 633 | stat = os.stat(self.server_address) |
|
623 | 634 | return (stat.st_ino == self._socketstat.st_ino and |
|
624 | 635 | stat.st_mtime == self._socketstat.st_mtime) |
|
625 | 636 | except OSError: |
|
626 | 637 | return False |
|
627 | 638 | |
|
628 | 639 | def unlinksocketfile(self): |
|
629 | 640 | if not self.issocketowner(): |
|
630 | 641 | return |
|
631 | 642 | # it is possible to have a race condition here that we may |
|
632 | 643 | # remove another server's socket file. but that's okay |
|
633 | 644 | # since that server will detect and exit automatically and |
|
634 | 645 | # the client will start a new server on demand. |
|
635 | 646 | try: |
|
636 | 647 | os.unlink(self.server_address) |
|
637 | 648 | except OSError as exc: |
|
638 | 649 | if exc.errno != errno.ENOENT: |
|
639 | 650 | raise |
|
640 | 651 | |
|
641 | 652 | class chgunixservice(commandserver.unixservice): |
|
642 | 653 | def init(self): |
|
643 | 654 | if self.repo: |
|
644 | 655 | # one chgserver can serve multiple repos. drop repo infomation |
|
645 | 656 | self.ui.setconfig('bundle', 'mainreporoot', '', 'repo') |
|
646 | 657 | self.repo = None |
|
647 | 658 | self._inithashstate() |
|
648 | 659 | self._checkextensions() |
|
649 | 660 | class cls(AutoExitMixIn, SocketServer.ForkingMixIn, |
|
650 | 661 | SocketServer.UnixStreamServer): |
|
651 | 662 | ui = self.ui |
|
652 | 663 | repo = self.repo |
|
653 | 664 | hashstate = self.hashstate |
|
654 | 665 | baseaddress = self.baseaddress |
|
655 | 666 | self.server = cls(self.address, _requesthandler) |
|
656 | 667 | self.server.idletimeout = self.ui.configint( |
|
657 | 668 | 'chgserver', 'idletimeout', self.server.idletimeout) |
|
658 | 669 | self.server.startautoexitthread() |
|
659 | 670 | self._createsymlink() |
|
660 | 671 | |
|
661 | 672 | def _inithashstate(self): |
|
662 | 673 | self.baseaddress = self.address |
|
663 | 674 | if self.ui.configbool('chgserver', 'skiphash', False): |
|
664 | 675 | self.hashstate = None |
|
665 | 676 | return |
|
666 | 677 | self.hashstate = hashstate.fromui(self.ui) |
|
667 | 678 | self.address = _hashaddress(self.address, self.hashstate.confighash) |
|
668 | 679 | |
|
669 | 680 | def _checkextensions(self): |
|
670 | 681 | if not self.hashstate: |
|
671 | 682 | return |
|
672 | 683 | if extensions.notloaded(): |
|
673 | 684 | # one or more extensions failed to load. mtimehash becomes |
|
674 | 685 | # meaningless because we do not know the paths of those extensions. |
|
675 | 686 | # set mtimehash to an illegal hash value to invalidate the server. |
|
676 | 687 | self.hashstate.mtimehash = '' |
|
677 | 688 | |
|
678 | 689 | def _createsymlink(self): |
|
679 | 690 | if self.baseaddress == self.address: |
|
680 | 691 | return |
|
681 | 692 | tempaddress = _tempaddress(self.baseaddress) |
|
682 | 693 | os.symlink(os.path.basename(self.address), tempaddress) |
|
683 | 694 | util.rename(tempaddress, self.baseaddress) |
|
684 | 695 | |
|
685 | 696 | def run(self): |
|
686 | 697 | try: |
|
687 | 698 | self.server.serve_forever() |
|
688 | 699 | finally: |
|
689 | 700 | self.server.unlinksocketfile() |
|
690 | 701 | |
|
691 | 702 | def uisetup(ui): |
|
692 | 703 | commandserver._servicemap['chgunix'] = chgunixservice |
|
693 | 704 | |
|
694 | 705 | # CHGINTERNALMARK is temporarily set by chg client to detect if chg will |
|
695 | 706 | # start another chg. drop it to avoid possible side effects. |
|
696 | 707 | if 'CHGINTERNALMARK' in os.environ: |
|
697 | 708 | del os.environ['CHGINTERNALMARK'] |
General Comments 0
You need to be logged in to leave comments.
Login now