view tests/test-trusted.py @ 50391:12f13b13f414 stable

revlog: avoid possible collision between directory and temporary index

Since 6.4, we create a temporary index file to write the split data without
overwriting the inline version too early. However, the store encoding does not
prevent these new `.i.s` file to collide with a directory with the same name.
While the odds for such a collision to happens are fairly low, the collision
would prevent Mercurial from working.

The store encoding have a mitigation solution in place to prevent such
collisions from happening for `.i` and `.d` files, but not for other extensions.
We cannot update this encoding scheme to solve the issue since it would diverge
from older version of Mercurial.

Instead, we create an alternative directory tree dedicated to such files.
The use of the `.i` extension combined with store encoding will prevent
collisions there.

# 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
import sys

from mercurial import (
    error,
    pycompat,
    ui as uimod,
    util,
)
from mercurial.utils import stringutil

hgrc = os.environ['HGRCPATH']
f = open(hgrc, 'rb')
basehgrc = f.read()
f.close()


def _maybesysstr(v):
    if isinstance(v, bytes):
        return pycompat.sysstr(v)
    return pycompat.sysstr(stringutil.pprint(v))


def bprint(*args, **kwargs):
    print(
        *[_maybesysstr(a) for a in args],
        **{k: _maybesysstr(v) for k, v in kwargs.items()}
    )
    # avoid awkward interleaving with ui object's output
    sys.stdout.flush()


def testui(
    user=b'foo',
    group=b'bar',
    tusers=(),
    tgroups=(),
    cuser=b'foo',
    cgroup=b'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, 'wb')
    f.write(basehgrc)
    f.write(b'\n[paths]\n')
    f.write(b'global = /some/path\n\n')

    if tusers or tgroups:
        f.write(b'[trusted]\n')
        if tusers:
            f.write(b'users = %s\n' % b', '.join(tusers))
        if tgroups:
            f.write(b'groups = %s\n' % b', '.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 b'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 = (b'different', b'same')
    who = (b'', b'user', b'group', b'user and the group')
    trusted = who[(user in tusers) + 2 * (group in tgroups)]
    if trusted:
        trusted = b', but we trust the ' + trusted
    bprint(
        b'# %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(b'devel', b'warn-config-unknown', False, b'test')
    u.setconfig(b'devel', b'all-warnings', False, b'test')
    u.setconfig(b'ui', b'debug', pycompat.bytestr(bool(debug)))
    u.setconfig(b'ui', b'report_untrusted', pycompat.bytestr(bool(report)))
    u.readconfig(b'.hg/hgrc')
    if silent:
        return u
    bprint(b'trusted')
    for name, path in u.configitems(b'paths'):
        bprint(b'   ', name, b'=', util.pconvert(path))
    bprint(b'untrusted')
    for name, path in u.configitems(b'paths', untrusted=True):
        bprint(b'.', end=b' ')
        u.config(b'paths', name)  # warning with debug=True
        bprint(b'.', end=b' ')
        u.config(b'paths', name, untrusted=True)  # no warnings
        bprint(name, b'=', util.pconvert(path))
    print()

    return u


os.mkdir(b'repo')
os.chdir(b'repo')
os.mkdir(b'.hg')
f = open(b'.hg/hgrc', 'wb')
f.write(b'[paths]\n')
f.write(b'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=b'def')
# different user, same group
testui(user=b'abc')
# ... but we trust the group
testui(user=b'abc', tgroups=[b'bar'])
# different user, different group
testui(user=b'abc', group=b'def')
# ... but we trust the user
testui(user=b'abc', group=b'def', tusers=[b'abc'])
# ... but we trust the group
testui(user=b'abc', group=b'def', tgroups=[b'def'])
# ... but we trust the user and the group
testui(user=b'abc', group=b'def', tusers=[b'abc'], tgroups=[b'def'])
# ... but we trust all users
bprint(b'# we trust all users')
testui(user=b'abc', group=b'def', tusers=[b'*'])
# ... but we trust all groups
bprint(b'# we trust all groups')
testui(user=b'abc', group=b'def', tgroups=[b'*'])
# ... but we trust the whole universe
bprint(b'# we trust all users and groups')
testui(user=b'abc', group=b'def', tusers=[b'*'], tgroups=[b'*'])
# ... check that users and groups are in different namespaces
bprint(b"# we don't get confused by users and groups with the same name")
testui(user=b'abc', group=b'def', tusers=[b'def'], tgroups=[b'abc'])
# ... lists of user names work
bprint(b"# list of user names")
testui(
    user=b'abc',
    group=b'def',
    tusers=[b'foo', b'xyz', b'abc', b'bleh'],
    tgroups=[b'bar', b'baz', b'qux'],
)
# ... lists of group names work
bprint(b"# list of group names")
testui(
    user=b'abc',
    group=b'def',
    tusers=[b'foo', b'xyz', b'bleh'],
    tgroups=[b'bar', b'def', b'baz', b'qux'],
)

bprint(b"# Can't figure out the name of the user running this process")
testui(user=b'abc', group=b'def', cuser=None)

bprint(b"# prints debug warnings")
u = testui(user=b'abc', group=b'def', cuser=b'foo', debug=True)

bprint(b"# report_untrusted enabled without debug hides warnings")
u = testui(user=b'abc', group=b'def', cuser=b'foo', report=False)

bprint(b"# report_untrusted enabled with debug shows warnings")
u = testui(user=b'abc', group=b'def', cuser=b'foo', debug=True, report=False)

bprint(b"# ui.readconfig sections")
filename = b'foobar'
f = open(filename, 'wb')
f.write(b'[foobar]\n')
f.write(b'baz = quux\n')
f.close()
u.readconfig(filename, sections=[b'foobar'])
bprint(u.config(b'foobar', b'baz'))

print()
bprint(b"# 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(b'devel', b'warn-config-unknown', False, b'test')
u.setconfig(b'devel', b'all-warnings', False, b'test')
u.setconfig(b'ui', b'debug', b'on')
u.readconfig(filename)
u2 = u.copy()


def username(uid=None):
    return b'foo'


util.username = username
u2.readconfig(b'.hg/hgrc')
bprint(b'trusted:')
bprint(u2.config(b'foobar', b'baz'))
bprint(b'untrusted:')
bprint(u2.config(b'foobar', b'baz', untrusted=True))

print()
bprint(b"# error handling")


def assertraises(f, exc=error.Abort):
    try:
        f()
    except exc as inst:
        bprint(b'raised', inst.__class__.__name__)
    else:
        bprint(b'no exception?!')


bprint(b"# file doesn't exist")
os.unlink(b'.hg/hgrc')
assert not os.path.exists(b'.hg/hgrc')
testui(debug=True, silent=True)
testui(user=b'abc', group=b'def', debug=True, silent=True)

print()
bprint(b"# parse error")
f = open(b'.hg/hgrc', 'wb')
f.write(b'foo')
f.close()

try:
    testui(user=b'abc', group=b'def', silent=True)
except error.ConfigError as inst:
    bprint(inst.format())

try:
    testui(debug=True, silent=True)
except error.ConfigError as inst:
    bprint(inst.format())

print()
bprint(b'# access typed information')
with open(b'.hg/hgrc', 'wb') as f:
    f.write(
        b'''\
[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=b'abc', group=b'def', cuser=b'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)


bprint(b'# suboptions, trusted and untrusted')
trusted = u.configsuboptions(b'foo', b'sub')
untrusted = u.configsuboptions(b'foo', b'sub', untrusted=True)
bprint(
    (trusted[0], sorted(trusted[1].items())),
    (untrusted[0], sorted(untrusted[1].items())),
)
bprint(b'# path, trusted and untrusted')
bprint(configpath(b'foo', b'path'), configpath(b'foo', b'path', untrusted=True))
bprint(b'# bool, trusted and untrusted')
bprint(
    u.configbool(b'foo', b'bool'), u.configbool(b'foo', b'bool', untrusted=True)
)
bprint(b'# int, trusted and untrusted')
bprint(
    u.configint(b'foo', b'int', 0),
    u.configint(b'foo', b'int', 0, untrusted=True),
)
bprint(b'# bytes, trusted and untrusted')
bprint(
    u.configbytes(b'foo', b'bytes', 0),
    u.configbytes(b'foo', b'bytes', 0, untrusted=True),
)
bprint(b'# list, trusted and untrusted')
bprint(
    u.configlist(b'foo', b'list', []),
    u.configlist(b'foo', b'list', [], untrusted=True),
)