changelog: specify checkambig=True to revlog.__init__, to avoid ambiguity
If steps below occurs at "the same time in sec", all of mtime, ctime
and size are same between (1) and (3).
1. append data to 00changelog.i (and close transaction)
2. discard appended data by truncation (strip or rollback)
3. append same size but different data to 00changelog.i again
Therefore, cache validation doesn't work after (3) as expected.
To avoid such file stat ambiguity around truncation, this patch
specifies checkambig=True to revlog.__init__(). This makes revlog
write changes out with checkambig=True.
Even though changes of 00changelog.i themselves are written out at
changelog._finalize(), this checkambig=True is needed, because
revlog.checkinlinesize(), which is invoked at the end of
changelog._finalize(), might replace already changed 00changelog.i by
converted one.
Even after this patch, avoiding file stat ambiguity of 00changelog.i
around truncation isn't yet completed, because truncation side isn't
aware of this issue.
This is a part of ExactCacheValidationPlan.
https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan
from __future__ import absolute_import, print_function
from mercurial import demandimport; demandimport.enable()
from mercurial import (
error,
ui as uimod,
url,
util,
)
urlerr = util.urlerr
urlreq = util.urlreq
class myui(uimod.ui):
def interactive(self):
return False
origui = myui()
def writeauth(items):
ui = origui.copy()
for name, value in items.iteritems():
ui.setconfig('auth', name, value)
return ui
def dumpdict(dict):
return '{' + ', '.join(['%s: %s' % (k, dict[k])
for k in sorted(dict.iterkeys())]) + '}'
def test(auth, urls=None):
print('CFG:', dumpdict(auth))
prefixes = set()
for k in auth:
prefixes.add(k.split('.', 1)[0])
for p in prefixes:
for name in ('.username', '.password'):
if (p + name) not in auth:
auth[p + name] = p
auth = dict((k, v) for k, v in auth.iteritems() if v is not None)
ui = writeauth(auth)
def _test(uri):
print('URI:', uri)
try:
pm = url.passwordmgr(ui, urlreq.httppasswordmgrwithdefaultrealm())
u, authinfo = util.url(uri).authinfo()
if authinfo is not None:
pm.add_password(*authinfo)
print(' ', pm.find_user_password('test', u))
except error.Abort:
print(' ','abort')
if not urls:
urls = [
'http://example.org/foo',
'http://example.org/foo/bar',
'http://example.org/bar',
'https://example.org/foo',
'https://example.org/foo/bar',
'https://example.org/bar',
'https://x@example.org/bar',
'https://y@example.org/bar',
]
for u in urls:
_test(u)
print('\n*** Test in-uri schemes\n')
test({'x.prefix': 'http://example.org'})
test({'x.prefix': 'https://example.org'})
test({'x.prefix': 'http://example.org', 'x.schemes': 'https'})
test({'x.prefix': 'https://example.org', 'x.schemes': 'http'})
print('\n*** Test separately configured schemes\n')
test({'x.prefix': 'example.org', 'x.schemes': 'http'})
test({'x.prefix': 'example.org', 'x.schemes': 'https'})
test({'x.prefix': 'example.org', 'x.schemes': 'http https'})
print('\n*** Test prefix matching\n')
test({'x.prefix': 'http://example.org/foo',
'y.prefix': 'http://example.org/bar'})
test({'x.prefix': 'http://example.org/foo',
'y.prefix': 'http://example.org/foo/bar'})
test({'x.prefix': '*', 'y.prefix': 'https://example.org/bar'})
print('\n*** Test user matching\n')
test({'x.prefix': 'http://example.org/foo',
'x.username': None,
'x.password': 'xpassword'},
urls=['http://y@example.org/foo'])
test({'x.prefix': 'http://example.org/foo',
'x.username': None,
'x.password': 'xpassword',
'y.prefix': 'http://example.org/foo',
'y.username': 'y',
'y.password': 'ypassword'},
urls=['http://y@example.org/foo'])
test({'x.prefix': 'http://example.org/foo/bar',
'x.username': None,
'x.password': 'xpassword',
'y.prefix': 'http://example.org/foo',
'y.username': 'y',
'y.password': 'ypassword'},
urls=['http://y@example.org/foo/bar'])
def testauthinfo(fullurl, authurl):
print('URIs:', fullurl, authurl)
pm = urlreq.httppasswordmgrwithdefaultrealm()
pm.add_password(*util.url(fullurl).authinfo()[1])
print(pm.find_user_password('test', authurl))
print('\n*** Test urllib2 and util.url\n')
testauthinfo('http://user@example.com:8080/foo', 'http://example.com:8080/foo')