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Viewing changes to bzrlib/benchmarks/tree_creator/kernel_like.py

  • Committer: John Arbash Meinel
  • Date: 2006-08-15 03:04:06 UTC
  • mto: This revision was merged to the branch mainline in revision 1923.
  • Revision ID: john@arbash-meinel.com-20060815030406-99b1c2c16363eb13
Move all the new TreeCreator classes into separate files.

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bzrlib/benchmarks/tree_creator/kernel_like.py
 
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# Copyright (C) 2006 by Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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"""Tree creators for kernel-like trees"""
 
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import os
 
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from bzrlib import (
 
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    add,
 
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    bzrdir,
 
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    osutils,
 
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    )
 
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from bzrlib.benchmarks.tree_creator import TreeCreator
 
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class KernelLikeTreeCreator(TreeCreator):
 
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    """Create a basic tree with ~10k unversioned files""" 
 
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    def __init__(self, test, link_working=False, url=None):
 
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        super(KernelLikeTreeCreator, self).__init__(test,
 
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            tree_name='kernel_like_tree',
 
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            link_working=link_working,
 
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            link_bzr=False)
 
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        self._url = url
 
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    def create(self, root):
 
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        """Create all the kernel files in the given location.
 
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        This is overloaded for compatibility reasons.
 
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        """
 
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        if self._url is not None:
 
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            b = bzrdir.BzrDir.create_branch_convenience(self._url)
 
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            d = bzrdir.BzrDir.create(root)
 
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            bzrlib.branch.BranchReferenceFormat().initialize(d, b)
 
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            tree = d.create_workingtree()
 
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        else:
 
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            tree = bzrdir.BzrDir.create_standalone_workingtree(root)
 
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        if not self._link_working or not self.is_caching_enabled():
 
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            # Turns out that 'shutil.copytree()' is no faster than
 
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            # just creating them. Probably the python overhead.
 
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            # Plain _make_kernel_files takes 3-5s
 
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            # cp -a takes 3s
 
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            # using hardlinks takes < 1s.
 
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            self._create_tree(root=root, in_cache=False)
 
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            return tree
 
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        self.ensure_cached()
 
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        cache_dir = self._get_cache_dir()
 
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        osutils.copy_tree(cache_dir, root,
 
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                          handlers={'file':os.link})
 
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        return tree
 
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    def _create_tree(self, root, in_cache=False):
 
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        # a kernel tree has ~10000 and 500 directory, with most files around 
 
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        # 3-4 levels deep. 
 
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        # we simulate this by three levels of dirs named 0-7, givin 512 dirs,
 
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        # and 20 files each.
 
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        files = []
 
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        for outer in range(8):
 
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            files.append("%s/" % outer)
 
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            for middle in range(8):
 
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                files.append("%s/%s/" % (outer, middle))
 
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                for inner in range(8):
 
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                    prefix = "%s/%s/%s/" % (outer, middle, inner)
 
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                    files.append(prefix)
 
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                    files.extend([prefix + str(foo) for foo in range(20)])
 
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        cwd = osutils.getcwd()
 
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        os.chdir(root)
 
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        self._test.build_tree(files)
 
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        os.chdir(cwd)
 
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        if in_cache:
 
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            self._protect_files(root)
 
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class KernelLikeAddedTreeCreator(TreeCreator):
 
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    def __init__(self, test, link_working=False, hot_cache=True):
 
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        super(KernelLikeAddedTreeCreator, self).__init__(test,
 
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            tree_name='kernel_like_added_tree',
 
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            link_working=link_working,
 
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            link_bzr=False,
 
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            hot_cache=hot_cache)
 
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    def _create_tree(self, root, in_cache=False):
 
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        """Create a kernel-like tree with the all files added
 
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        :param root: The root directory to create the files
 
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        :param in_cache: Is this being created in the cache dir?
 
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        """
 
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        kernel_creator = KernelLikeTreeCreator(self._test,
 
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                                               link_working=in_cache)
 
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        tree = kernel_creator.create(root=root)
 
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        # Add everything to it
 
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        tree.lock_write()
 
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        try:
 
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            add.smart_add_tree(tree, [root], recurse=True, save=True)
 
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            if in_cache:
 
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                self._protect_files(root+'/.bzr')
 
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        finally:
 
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            tree.unlock()
 
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        return tree
 
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class KernelLikeCommittedTreeCreator(TreeCreator):
 
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    """Create a tree with ~10K files, and a single commit adding all of them"""
 
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    def __init__(self, test, link_working=False, link_bzr=False,
 
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                 hot_cache=True):
 
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        super(KernelLikeCommittedTreeCreator, self).__init__(test,
 
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            tree_name='kernel_like_committed_tree',
 
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            link_working=link_working,
 
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            link_bzr=link_bzr,
 
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            hot_cache=hot_cache)
 
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    def _create_tree(self, root, in_cache=False):
 
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        """Create a kernel-like tree with all files committed
 
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        :param root: The root directory to create the files
 
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        :param in_cache: Is this being created in the cache dir?
 
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        """
 
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        kernel_creator = KernelLikeAddedTreeCreator(self._test,
 
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                                                    link_working=in_cache,
 
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                                                    hot_cache=(not in_cache))
 
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        tree = kernel_creator.create(root=root)
 
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        tree.commit('first post', rev_id='r1')
 
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        if in_cache:
 
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            self._protect_files(root+'/.bzr')
 
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        return tree