Mercurial > hg
view tests/test-trusted.py @ 37631:2f626233859b
wireproto: implement batching on peer executor interface
This is a bit more complicated than non-batch requests because we
need to buffer sends until the last request arrives *and* we need
to support resolving futures as data arrives from the remote.
In a classical concurrent.futures executor model, the future
"starts" as soon as it is submitted. However, we have nothing to
start until the last command is submitted.
If we did nothing, calling result() would deadlock, since the future
hasn't "started." So in the case where we queue the command, we return
a special future type whose result() will trigger sendcommands().
This eliminates the deadlock potential. It also serves as a check
against callers who may be calling result() prematurely, as it will
prevent any subsequent callcommands() from working. This behavior
is slightly annoying and a bit restrictive. But it's the world
that half duplex connections forces on us.
In order to support streaming responses, we were previously using
a generator. But with a futures-based API, we're using futures
and not generators. So in order to get streaming, we need a
background thread to read data from the server.
The approach taken in this patch is to leverage the ThreadPoolExecutor
from concurrent.futures for managing a background thread. We create
an executor and future that resolves when all response data is
processed (or an error occurs). When exiting the context manager,
we wait on that background reading before returning.
I was hoping we could manually spin up a threading.Thread and this
would be simple. But I ran into a few deadlocks when implementing.
After looking at the source code to concurrent.futures, I figured
it would just be easier to use a ThreadPoolExecutor than implement
all the code needed to manually manage a thread.
To prove this works, a use of the batch API in discovery has been
updated.
Differential Revision: https://phab.mercurial-scm.org/D3269
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 13 Apr 2018 11:02:34 -0700 |
parents | 85a2db47ad50 |
children | 73ccba60aaa1 |
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# Since it's not easy to write a test that portably deals # with files from different users/groups, we cheat a bit by # monkey-patching some functions in the util module from __future__ import absolute_import, print_function import os from mercurial import ( error, ui as uimod, util, ) hgrc = os.environ['HGRCPATH'] f = open(hgrc) basehgrc = f.read() f.close() def testui(user='foo', group='bar', tusers=(), tgroups=(), cuser='foo', cgroup='bar', debug=False, silent=False, report=True): # user, group => owners of the file # tusers, tgroups => trusted users/groups # cuser, cgroup => user/group of the current process # write a global hgrc with the list of trusted users/groups and # some setting so that we can be sure it was read f = open(hgrc, 'w') f.write(basehgrc) f.write('\n[paths]\n') f.write('global = /some/path\n\n') if tusers or tgroups: f.write('[trusted]\n') if tusers: f.write('users = %s\n' % ', '.join(tusers)) if tgroups: f.write('groups = %s\n' % ', '.join(tgroups)) f.close() # override the functions that give names to uids and gids def username(uid=None): if uid is None: return cuser return user util.username = username def groupname(gid=None): if gid is None: return 'bar' return group util.groupname = groupname def isowner(st): return user == cuser util.isowner = isowner # try to read everything #print '# File belongs to user %s, group %s' % (user, group) #print '# trusted users = %s; trusted groups = %s' % (tusers, tgroups) kind = ('different', 'same') who = ('', 'user', 'group', 'user and the group') trusted = who[(user in tusers) + 2*(group in tgroups)] if trusted: trusted = ', but we trust the ' + trusted print('# %s user, %s group%s' % (kind[user == cuser], kind[group == cgroup], trusted)) u = uimod.ui.load() # disable the configuration registration warning # # the purpose of this test is to check the old behavior, not to validate the # behavior from registered item. so we silent warning related to unregisted # config. u.setconfig('devel', 'warn-config-unknown', False, 'test') u.setconfig('devel', 'all-warnings', False, 'test') u.setconfig('ui', 'debug', str(bool(debug))) u.setconfig('ui', 'report_untrusted', str(bool(report))) u.readconfig('.hg/hgrc') if silent: return u print('trusted') for name, path in u.configitems('paths'): print(' ', name, '=', util.pconvert(path)) print('untrusted') for name, path in u.configitems('paths', untrusted=True): print('.', end=' ') u.config('paths', name) # warning with debug=True print('.', end=' ') u.config('paths', name, untrusted=True) # no warnings print(name, '=', util.pconvert(path)) print() return u os.mkdir('repo') os.chdir('repo') os.mkdir('.hg') f = open('.hg/hgrc', 'w') f.write('[paths]\n') f.write('local = /another/path\n\n') f.close() #print '# Everything is run by user foo, group bar\n' # same user, same group testui() # same user, different group testui(group='def') # different user, same group testui(user='abc') # ... but we trust the group testui(user='abc', tgroups=['bar']) # different user, different group testui(user='abc', group='def') # ... but we trust the user testui(user='abc', group='def', tusers=['abc']) # ... but we trust the group testui(user='abc', group='def', tgroups=['def']) # ... but we trust the user and the group testui(user='abc', group='def', tusers=['abc'], tgroups=['def']) # ... but we trust all users print('# we trust all users') testui(user='abc', group='def', tusers=['*']) # ... but we trust all groups print('# we trust all groups') testui(user='abc', group='def', tgroups=['*']) # ... but we trust the whole universe print('# we trust all users and groups') testui(user='abc', group='def', tusers=['*'], tgroups=['*']) # ... check that users and groups are in different namespaces print("# we don't get confused by users and groups with the same name") testui(user='abc', group='def', tusers=['def'], tgroups=['abc']) # ... lists of user names work print("# list of user names") testui(user='abc', group='def', tusers=['foo', 'xyz', 'abc', 'bleh'], tgroups=['bar', 'baz', 'qux']) # ... lists of group names work print("# list of group names") testui(user='abc', group='def', tusers=['foo', 'xyz', 'bleh'], tgroups=['bar', 'def', 'baz', 'qux']) print("# Can't figure out the name of the user running this process") testui(user='abc', group='def', cuser=None) print("# prints debug warnings") u = testui(user='abc', group='def', cuser='foo', debug=True) print("# report_untrusted enabled without debug hides warnings") u = testui(user='abc', group='def', cuser='foo', report=False) print("# report_untrusted enabled with debug shows warnings") u = testui(user='abc', group='def', cuser='foo', debug=True, report=False) print("# ui.readconfig sections") filename = 'foobar' f = open(filename, 'w') f.write('[foobar]\n') f.write('baz = quux\n') f.close() u.readconfig(filename, sections=['foobar']) print(u.config('foobar', 'baz')) print() print("# read trusted, untrusted, new ui, trusted") u = uimod.ui.load() # disable the configuration registration warning # # the purpose of this test is to check the old behavior, not to validate the # behavior from registered item. so we silent warning related to unregisted # config. u.setconfig('devel', 'warn-config-unknown', False, 'test') u.setconfig('devel', 'all-warnings', False, 'test') u.setconfig('ui', 'debug', 'on') u.readconfig(filename) u2 = u.copy() def username(uid=None): return 'foo' util.username = username u2.readconfig('.hg/hgrc') print('trusted:') print(u2.config('foobar', 'baz')) print('untrusted:') print(u2.config('foobar', 'baz', untrusted=True)) print() print("# error handling") def assertraises(f, exc=error.Abort): try: f() except exc as inst: print('raised', inst.__class__.__name__) else: print('no exception?!') print("# file doesn't exist") os.unlink('.hg/hgrc') assert not os.path.exists('.hg/hgrc') testui(debug=True, silent=True) testui(user='abc', group='def', debug=True, silent=True) print() print("# parse error") f = open('.hg/hgrc', 'w') f.write('foo') f.close() try: testui(user='abc', group='def', silent=True) except error.ParseError as inst: print(inst) try: testui(debug=True, silent=True) except error.ParseError as inst: print(inst) print() print('# access typed information') with open('.hg/hgrc', 'w') as f: f.write('''\ [foo] sub=main sub:one=one sub:two=two path=monty/python bool=true int=42 bytes=81mb list=spam,ham,eggs ''') u = testui(user='abc', group='def', cuser='foo', silent=True) def configpath(section, name, default=None, untrusted=False): path = u.configpath(section, name, default, untrusted) if path is None: return None return util.pconvert(path) print('# suboptions, trusted and untrusted') trusted = u.configsuboptions('foo', 'sub') untrusted = u.configsuboptions('foo', 'sub', untrusted=True) print( (trusted[0], sorted(trusted[1].items())), (untrusted[0], sorted(untrusted[1].items()))) print('# path, trusted and untrusted') print(configpath('foo', 'path'), configpath('foo', 'path', untrusted=True)) print('# bool, trusted and untrusted') print(u.configbool('foo', 'bool'), u.configbool('foo', 'bool', untrusted=True)) print('# int, trusted and untrusted') print( u.configint('foo', 'int', 0), u.configint('foo', 'int', 0, untrusted=True)) print('# bytes, trusted and untrusted') print( u.configbytes('foo', 'bytes', 0), u.configbytes('foo', 'bytes', 0, untrusted=True)) print('# list, trusted and untrusted') print( u.configlist('foo', 'list', []), u.configlist('foo', 'list', [], untrusted=True))