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#! /usr/bin/env python
# -*- coding: UTF-8 -*-
# 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
from bzrlib.trace import mutter
class TreeDelta(object):
"""Describes changes from one tree to another.
Contains four lists:
added
(path, id, kind)
removed
(path, id, kind)
renamed
(oldpath, newpath, id, kind, text_modified)
modified
(path, id, kind)
unchanged
(path, id, kind)
Each id is listed only once.
Files that are both modified and renamed are listed only in
renamed, with the text_modified flag true.
Files are only considered renamed if their name has changed or
their parent directory has changed. Renaming a directory
does not count as renaming all its contents.
The lists are normally sorted when the delta is created.
"""
def __init__(self):
self.added = []
self.removed = []
self.renamed = []
self.modified = []
self.unchanged = []
def __eq__(self, other):
if not isinstance(other, TreeDelta):
return False
return self.added == other.added \
and self.removed == other.removed \
and self.renamed == other.renamed \
and self.modified == other.modified \
and self.unchanged == other.unchanged
def __ne__(self, other):
return not (self == other)
def __repr__(self):
return "TreeDelta(added=%r, removed=%r, renamed=%r, modified=%r," \
" unchanged=%r)" % (self.added, self.removed, self.renamed,
self.modified, self.unchanged)
def has_changed(self):
return bool(self.modified
or self.added
or self.removed
or self.renamed)
def touches_file_id(self, file_id):
"""Return True if file_id is modified by this delta."""
for l in self.added, self.removed, self.modified:
for v in l:
if v[1] == file_id:
return True
for v in self.renamed:
if v[2] == file_id:
return True
return False
def show(self, to_file, show_ids=False, show_unchanged=False):
def show_list(files):
for path, fid, kind in files:
if kind == 'directory':
path += '/'
elif kind == 'symlink':
path += '@'
if show_ids:
print >>to_file, ' %-30s %s' % (path, fid)
else:
print >>to_file, ' ', path
if self.removed:
print >>to_file, 'removed:'
show_list(self.removed)
if self.added:
print >>to_file, 'added:'
show_list(self.added)
if self.renamed:
print >>to_file, 'renamed:'
for oldpath, newpath, fid, kind, text_modified in self.renamed:
if show_ids:
print >>to_file, ' %s => %s %s' % (oldpath, newpath, fid)
else:
print >>to_file, ' %s => %s' % (oldpath, newpath)
if self.modified:
print >>to_file, 'modified:'
show_list(self.modified)
if show_unchanged and self.unchanged:
print >>to_file, 'unchanged:'
show_list(self.unchanged)
def compare_trees(old_tree, new_tree, want_unchanged=False, specific_files=None):
"""Describe changes from one tree to another.
Returns a TreeDelta with details of added, modified, renamed, and
deleted entries.
The root entry is specifically exempt.
This only considers versioned files.
want_unchanged
If true, also list files unchanged from one version to
the next.
specific_files
If true, only check for changes to specified names or
files within them.
"""
from osutils import is_inside_any
old_inv = old_tree.inventory
new_inv = new_tree.inventory
delta = TreeDelta()
mutter('start compare_trees')
# TODO: match for specific files can be rather smarter by finding
# the IDs of those files up front and then considering only that.
for file_id in old_tree:
if file_id in new_tree:
old_ie = old_inv[file_id]
new_ie = new_inv[file_id]
kind = old_ie.kind
assert kind == new_ie.kind
assert kind in ('file', 'directory', 'symlink', 'root_directory'), \
'invalid file kind %r' % kind
if kind == 'root_directory':
continue
if specific_files:
if (not is_inside_any(specific_files, old_inv.id2path(file_id))
and not is_inside_any(specific_files, new_inv.id2path(file_id))):
continue
if kind == 'file':
old_sha1 = old_tree.get_file_sha1(file_id)
new_sha1 = new_tree.get_file_sha1(file_id)
text_modified = (old_sha1 != new_sha1)
else:
## mutter("no text to check for %r %r" % (file_id, kind))
text_modified = False
# TODO: Can possibly avoid calculating path strings if the
# two files are unchanged and their names and parents are
# the same and the parents are unchanged all the way up.
# May not be worthwhile.
if (old_ie.name != new_ie.name
or old_ie.parent_id != new_ie.parent_id):
delta.renamed.append((old_inv.id2path(file_id),
new_inv.id2path(file_id),
file_id, kind,
text_modified))
elif text_modified:
delta.modified.append((new_inv.id2path(file_id), file_id, kind))
elif want_unchanged:
delta.unchanged.append((new_inv.id2path(file_id), file_id, kind))
else:
kind = old_inv.get_file_kind(file_id)
if kind == 'root_directory':
continue
old_path = old_inv.id2path(file_id)
if specific_files:
if not is_inside_any(specific_files, old_path):
continue
delta.removed.append((old_path, file_id, kind))
mutter('start looking for new files')
for file_id in new_inv:
if file_id in old_inv:
continue
kind = new_inv.get_file_kind(file_id)
if kind == 'root_directory':
continue
new_path = new_inv.id2path(file_id)
if specific_files:
if not is_inside_any(specific_files, new_path):
continue
delta.added.append((new_path, file_id, kind))
delta.removed.sort()
delta.added.sort()
delta.renamed.sort()
delta.modified.sort()
delta.unchanged.sort()
return delta
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