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# Copyright (C) 2006 by 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
"""Tree creators for kernel-like trees"""
import os
from bzrlib import (
add,
bzrdir,
osutils,
)
from bzrlib.benchmarks.tree_creator import TreeCreator
class KernelLikeTreeCreator(TreeCreator):
"""Create a basic tree with ~10k unversioned files"""
def __init__(self, test, link_working=False, url=None):
super(KernelLikeTreeCreator, self).__init__(test,
tree_name='kernel_like_tree',
link_working=link_working,
link_bzr=False)
self._url = url
def create(self, root):
"""Create all the kernel files in the given location.
This is overloaded for compatibility reasons.
"""
if self._url is not None:
b = bzrdir.BzrDir.create_branch_convenience(self._url)
d = bzrdir.BzrDir.create(root)
bzrlib.branch.BranchReferenceFormat().initialize(d, b)
tree = d.create_workingtree()
else:
tree = bzrdir.BzrDir.create_standalone_workingtree(root)
if not self._link_working or not self.is_caching_enabled():
# Turns out that 'shutil.copytree()' is no faster than
# just creating them. Probably the python overhead.
# Plain _make_kernel_files takes 3-5s
# cp -a takes 3s
# using hardlinks takes < 1s.
self._create_tree(root=root, in_cache=False)
return tree
self.ensure_cached()
cache_dir = self._get_cache_dir()
osutils.copy_tree(cache_dir, root,
handlers={'file':os.link})
return tree
def _create_tree(self, root, in_cache=False):
# a kernel tree has ~10000 and 500 directory, with most files around
# 3-4 levels deep.
# we simulate this by three levels of dirs named 0-7, givin 512 dirs,
# and 20 files each.
files = []
for outer in range(8):
files.append("%s/" % outer)
for middle in range(8):
files.append("%s/%s/" % (outer, middle))
for inner in range(8):
prefix = "%s/%s/%s/" % (outer, middle, inner)
files.append(prefix)
files.extend([prefix + str(foo) for foo in range(20)])
cwd = osutils.getcwd()
os.chdir(root)
self._test.build_tree(files)
os.chdir(cwd)
if in_cache:
self._protect_files(root)
class KernelLikeAddedTreeCreator(TreeCreator):
def __init__(self, test, link_working=False, hot_cache=True):
super(KernelLikeAddedTreeCreator, self).__init__(test,
tree_name='kernel_like_added_tree',
link_working=link_working,
link_bzr=False,
hot_cache=hot_cache)
def _create_tree(self, root, in_cache=False):
"""Create a kernel-like tree with the all files added
:param root: The root directory to create the files
:param in_cache: Is this being created in the cache dir?
"""
kernel_creator = KernelLikeTreeCreator(self._test,
link_working=in_cache)
tree = kernel_creator.create(root=root)
# Add everything to it
tree.lock_write()
try:
add.smart_add_tree(tree, [root], recurse=True, save=True)
if in_cache:
self._protect_files(root+'/.bzr')
finally:
tree.unlock()
return tree
class KernelLikeCommittedTreeCreator(TreeCreator):
"""Create a tree with ~10K files, and a single commit adding all of them"""
def __init__(self, test, link_working=False, link_bzr=False,
hot_cache=True):
super(KernelLikeCommittedTreeCreator, self).__init__(test,
tree_name='kernel_like_committed_tree',
link_working=link_working,
link_bzr=link_bzr,
hot_cache=hot_cache)
def _create_tree(self, root, in_cache=False):
"""Create a kernel-like tree with all files committed
:param root: The root directory to create the files
:param in_cache: Is this being created in the cache dir?
"""
kernel_creator = KernelLikeAddedTreeCreator(self._test,
link_working=in_cache,
hot_cache=(not in_cache))
tree = kernel_creator.create(root=root)
tree.commit('first post', rev_id='r1')
if in_cache:
self._protect_files(root+'/.bzr')
return tree
# Helper functions to change the above classes into a single function call
def make_kernel_like_tree(test, root, link_working=True):
"""Setup a temporary tree roughly like a kernel tree.
:param url: Creat the kernel like tree as a lightweight checkout
of a new branch created at url.
:param link_working: instead of creating a new copy of all files
just hardlink the working tree. Tests must request this, because
they must break links if they want to change the files
"""
creator = KernelLikeTreeCreator(test, link_working=link_working)
return creator.create(root=root)
def make_kernel_like_added_tree(test, root,
link_working=True,
hot_cache=True):
"""Make a kernel like tree, with all files added
:param root: Where to create the files
:param link_working: Instead of copying all of the working tree
files, just hardlink them to the cached files. Tests can unlink
files that they will change.
:param hot_cache: Run through the newly created tree and make sure
the stat-cache is correct. The old way of creating a freshly
added tree always had a hot cache.
"""
creator = KernelLikeAddedTreeCreator(test, link_working=link_working,
hot_cache=hot_cache)
return creator.create(root=root)
def make_kernel_like_committed_tree(test, root='.',
link_working=True,
link_bzr=False,
hot_cache=True):
"""Make a kernel like tree, with all files added and committed
:param root: Where to create the files
:param link_working: Instead of copying all of the working tree
files, just hardlink them to the cached files. Tests can unlink
files that they will change.
:param link_bzr: Hardlink the .bzr directory. For readonly
operations this is safe, and shaves off a lot of setup time
"""
creator = KernelLikeCommittedTreeCreator(test,
link_working=link_working,
link_bzr=link_bzr,
hot_cache=hot_cache)
return creator.create(root=root)
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