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# Copyright (C) 2005-2012 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Debug commands for the bzr formats."""
from io import BytesIO
from .. import (
errors,
osutils,
static_tuple,
transport,
)
from ..workingtree import WorkingTree
from ..commands import (
Command,
display_command,
)
from ..option import Option
from . import (
btree_index,
)
class cmd_dump_btree(Command):
__doc__ = """Dump the contents of a btree index file to stdout.
PATH is a btree index file, it can be any URL. This includes things like
.bzr/repository/pack-names, or .bzr/repository/indices/a34b3a...ca4a4.iix
By default, the tuples stored in the index file will be displayed. With
--raw, we will uncompress the pages, but otherwise display the raw bytes
stored in the index.
"""
# TODO: Do we want to dump the internal nodes as well?
# TODO: It would be nice to be able to dump the un-parsed information,
# rather than only going through iter_all_entries. However, this is
# good enough for a start
hidden = True
encoding_type = 'exact'
takes_args = ['path']
takes_options = [Option('raw', help='Write the uncompressed bytes out,'
' rather than the parsed tuples.'),
]
def run(self, path, raw=False):
dirname, basename = osutils.split(path)
t = transport.get_transport(dirname)
if raw:
self._dump_raw_bytes(t, basename)
else:
self._dump_entries(t, basename)
def _get_index_and_bytes(self, trans, basename):
"""Create a BTreeGraphIndex and raw bytes."""
bt = btree_index.BTreeGraphIndex(trans, basename, None)
bytes = trans.get_bytes(basename)
bt._file = BytesIO(bytes)
bt._size = len(bytes)
return bt, bytes
def _dump_raw_bytes(self, trans, basename):
import zlib
# We need to parse at least the root node.
# This is because the first page of every row starts with an
# uncompressed header.
bt, bytes = self._get_index_and_bytes(trans, basename)
for page_idx, page_start in enumerate(range(0, len(bytes),
btree_index._PAGE_SIZE)):
page_end = min(page_start + btree_index._PAGE_SIZE, len(bytes))
page_bytes = bytes[page_start:page_end]
if page_idx == 0:
self.outf.write('Root node:\n')
header_end, data = bt._parse_header_from_bytes(page_bytes)
self.outf.write(page_bytes[:header_end])
page_bytes = data
self.outf.write('\nPage %d\n' % (page_idx,))
if len(page_bytes) == 0:
self.outf.write('(empty)\n')
else:
decomp_bytes = zlib.decompress(page_bytes)
self.outf.write(decomp_bytes)
self.outf.write('\n')
def _dump_entries(self, trans, basename):
try:
st = trans.stat(basename)
except errors.TransportNotPossible:
# We can't stat, so we'll fake it because we have to do the 'get()'
# anyway.
bt, _ = self._get_index_and_bytes(trans, basename)
else:
bt = btree_index.BTreeGraphIndex(trans, basename, st.st_size)
for node in bt.iter_all_entries():
# Node is made up of:
# (index, key, value, [references])
try:
refs = node[3]
except IndexError:
refs_as_tuples = None
else:
refs_as_tuples = static_tuple.as_tuples(refs)
if refs_as_tuples is not None:
refs_as_tuples = tuple(
tuple(tuple(r.decode('utf-8')
for r in t1) for t1 in t2)
for t2 in refs_as_tuples)
as_tuple = (
tuple([r.decode('utf-8') for r in node[1]]),
node[2].decode('utf-8'),
refs_as_tuples)
self.outf.write('%s\n' % (as_tuple,))
class cmd_file_id(Command):
__doc__ = """Print file_id of a particular file or directory.
The file_id is assigned when the file is first added and remains the
same through all revisions where the file exists, even when it is
moved or renamed.
"""
hidden = True
_see_also = ['inventory', 'ls']
takes_args = ['filename']
@display_command
def run(self, filename):
tree, relpath = WorkingTree.open_containing(filename)
file_id = tree.path2id(relpath)
if file_id is None:
raise errors.NotVersionedError(filename)
else:
self.outf.write(file_id.decode('utf-8') + '\n')
class cmd_file_path(Command):
__doc__ = """Print path of file_ids to a file or directory.
This prints one line for each directory down to the target,
starting at the branch root.
"""
hidden = True
takes_args = ['filename']
@display_command
def run(self, filename):
tree, relpath = WorkingTree.open_containing(filename)
fid = tree.path2id(relpath)
if fid is None:
raise errors.NotVersionedError(filename)
segments = osutils.splitpath(relpath)
for pos in range(1, len(segments) + 1):
path = osutils.joinpath(segments[:pos])
self.outf.write("%s\n" % tree.path2id(path))
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