~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Test that WorkingTrees don't fail if they are in a readonly dir."""

import os

import sys

import time

from bzrlib import (

    errors,

    hashcache,

    tests,

    )

from bzrlib.tests.workingtree_implementations import TestCaseWithWorkingTree

class TestReadonly(TestCaseWithWorkingTree):

    def setUp(self):

        if not self.platform_supports_readonly_dirs():

            raise tests.TestSkipped('platform does not support readonly'

                                    ' directories.')

        super(TestReadonly, self).setUp()

    def platform_supports_readonly_dirs(self):

        if sys.platform in ('win32', 'cygwin'):

            # Setting a directory to readonly in windows or cygwin doesn't seem

            # to have any effect. You can still create files in subdirectories.

            # TODO: jam 20061219 We could cheat and set just the hashcache file

            #       to readonly, which would make it fail when we try to delete

            #       or rewrite it. But that is a lot of cheating...

            return False

        return True

    def _set_all_dirs(self, basedir, readonly=True):

        """Recursively set all directories beneath this one."""

        if readonly:

            mode = 0555

        else:

            mode = 0755

        for root, dirs, files in os.walk(basedir, topdown=False):

            for d in dirs:

                path = os.path.join(root, d)

                os.chmod(path, mode)

    def set_dirs_readonly(self, basedir):

        """Set all directories readonly, and have it cleanup on test exit."""

        self._set_all_dirs(basedir, readonly=True)

        def cleanup():

            self._set_all_dirs(basedir, readonly=False)

        self.addCleanup(cleanup)

    def create_basic_tree(self):

        tree = self.make_branch_and_tree('tree')

        self.build_tree(['tree/a', 'tree/b/', 'tree/b/c'])

        tree.add(['a', 'b', 'b/c'])

        tree.commit('creating an initial tree.')

        return tree

    def _custom_cutoff_time(self):

        """We need to fake the cutoff time."""

        return time.time() + 10

    def test_readonly_unclean(self):

        """Even if the tree is unclean, we should still handle readonly dirs."""

        # First create a tree

        tree = self.create_basic_tree()

        # XXX: *Ugly* *ugly* hack, we need the hashcache to think it is out of

        # date, but we don't want to actually wait 3 seconds doing nothing.

        # WorkingTree formats that don't have a _hashcache should update this

        # test so that they pass. For now, we just assert that we have the

        # right type of objects available.

        the_hashcache = getattr(tree, '_hashcache', None)

        if the_hashcache is not None:

            self.assertIsInstance(the_hashcache, hashcache.HashCache)

            the_hashcache._cutoff_time = self._custom_cutoff_time

            hack_dirstate = False

        else:

            # DirState trees don't have a HashCache, but they do have the same

            # function as part of the DirState. However, until the tree is

            # locked, we don't have a DirState to modify

            hack_dirstate = True

        # Make it a little dirty

        self.build_tree_contents([('tree/a', 'new contents of a\n')])

        # Make it readonly, and do some operations and then unlock

        self.set_dirs_readonly('tree')

        tree.lock_read()

        try:

            if hack_dirstate:

                tree._dirstate._sha_cutoff_time = self._custom_cutoff_time

            # Make sure we check all the files

            for file_id in tree:

                size = tree.get_file_size(file_id)

                sha1 = tree.get_file_sha1(file_id)

        finally:

            tree.unlock()