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# -*- 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. The text_modified
applies either to the the content of the file or the target of the
symbolic link, depending of the kind of file.
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)
elif kind == 'symlink':
t1 = old_tree.get_symlink_target(file_id)
t2 = new_tree.get_symlink_target(file_id)
if t1 != t2:
mutter(" symlink target changed")
text_modified = True
else:
text_modified = False
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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