revlog: break up compression of large deltas
Python's zlib apparently makes an internal copy of strings passed to
compress(). To avoid this, compress strings 1M at a time, then join
them at the end if the result would be smaller than the original.
For initial commits of large but compressible files, this cuts peak
memory usage nearly in half.
# 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
import os
from mercurial import ui, util
hgrc = os.environ['HGRCPATH']
def testui(user='foo', group='bar', tusers=(), tgroups=(),
cuser='foo', cgroup='bar', debug=False, silent=False):
# 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('[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(fp, st=None):
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)
parentui = ui.ui()
parentui.updateopts(debug=debug)
u = ui.ui(parentui=parentui)
u.readconfig('.hg/hgrc')
if silent:
return u
print 'trusted'
for name, path in u.configitems('paths'):
print ' ', name, '=', path
print 'untrusted'
for name, path in u.configitems('paths', untrusted=True):
print '.',
u.config('paths', name) # warning with debug=True
print '.',
u.config('paths', name, untrusted=True) # no warnings
print name, '=', 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.write('interpolated = %(global)s%(local)s\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 "# ui.readsections"
filename = 'foobar'
f = open(filename, 'w')
f.write('[foobar]\n')
f.write('baz = quux\n')
f.close()
u.readsections(filename, 'foobar')
print u.config('foobar', 'baz')
print
print "# read trusted, untrusted, new ui, trusted"
u = ui.ui()
u.updateopts(debug=True)
u.readconfig(filename)
u2 = ui.ui(parentui=u)
def username(uid=None):
return 'foo'
util.username = username
u2.readconfig('.hg/hgrc')
print 'trusted:'
print u2.config('foobar', 'baz')
print u2.config('paths', 'interpolated')
print 'untrusted:'
print u2.config('foobar', 'baz', untrusted=True)
print u2.config('paths', 'interpolated', untrusted=True)
print
print "# error handling"
def assertraises(f, exc=util.Abort):
try:
f()
except exc, 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 = bar')
f.close()
testui(user='abc', group='def', silent=True)
assertraises(lambda: testui(debug=True, silent=True))
print
print "# interpolation error"
f = open('.hg/hgrc', 'w')
f.write('[foo]\n')
f.write('bar = %(')
f.close()
u = testui(debug=True, silent=True)
print '# regular config:'
print ' trusted',
assertraises(lambda: u.config('foo', 'bar'))
print 'untrusted',
assertraises(lambda: u.config('foo', 'bar', untrusted=True))
u = testui(user='abc', group='def', debug=True, silent=True)
print ' trusted ',
print u.config('foo', 'bar')
print 'untrusted',
assertraises(lambda: u.config('foo', 'bar', untrusted=True))
print '# configitems:'
print ' trusted ',
print u.configitems('foo')
print 'untrusted',
assertraises(lambda: u.configitems('foo', untrusted=True))