~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 2006 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

from bzrlib import (

    errors,

    osutils,

    )

from bzrlib.inventory import InventoryEntry

from bzrlib.trace import mutter

from bzrlib.symbol_versioning import deprecated_function, zero_nine

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, meta_modified)

    modified

        (path, id, kind, text_modified, meta_modified)

    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, short_status=False):

        """output this delta in status-like form to to_file."""

        def show_list(files, short_status_letter=''):

            for item in files:

                path, fid, kind = item[:3]

                if kind == 'directory':

                    path += '/'

                elif kind == 'symlink':

                    path += '@'

                if len(item) == 5 and item[4]:

                    path += '*'

                if show_ids:

                    print >>to_file, '%s  %-30s %s' % (short_status_letter, path, fid)

                else:

                    print >>to_file, '%s  %s' % (short_status_letter, path)

        if self.removed:

            if not short_status:

                print >>to_file, 'removed:'

                show_list(self.removed)

            else:

                show_list(self.removed, 'D')

        if self.added:

            if not short_status:

                print >>to_file, 'added:'

                show_list(self.added)

            else:

                show_list(self.added, 'A')

        extra_modified = []

        if self.renamed:

            short_status_letter = 'R'

            if not short_status:

                print >>to_file, 'renamed:'

                short_status_letter = ''

            for (oldpath, newpath, fid, kind,

                 text_modified, meta_modified) in self.renamed:

                if text_modified or meta_modified:

                    extra_modified.append((newpath, fid, kind,

                                           text_modified, meta_modified))

                if meta_modified:

                    newpath += '*'

                if show_ids:

                    print >>to_file, '%s  %s => %s %s' % (short_status_letter,

                                                          oldpath, newpath, fid)

                else:

                    print >>to_file, '%s  %s => %s' % (short_status_letter,

                                                       oldpath, newpath)

        if self.modified or extra_modified:

            short_status_letter = 'M'

            if not short_status:

                print >>to_file, 'modified:'

                short_status_letter = ''

            show_list(self.modified, short_status_letter)

            show_list(extra_modified, short_status_letter)

        if show_unchanged and self.unchanged:

            if not short_status:

                print >>to_file, 'unchanged:'

                show_list(self.unchanged)

            else:

                show_list(self.unchanged, 'S')

@deprecated_function(zero_nine)

def compare_trees(old_tree, new_tree, want_unchanged=False,

                  specific_files=None, extra_trees=None,

                  require_versioned=False):

    """compare_trees was deprecated in 0.10. Please see Tree.changes_from."""

    return new_tree.changes_from(old_tree,

        want_unchanged=want_unchanged,

        specific_files=specific_files,

        extra_trees=extra_trees,

        require_versioned=require_versioned,

        include_root=False)

def _compare_trees(old_tree, new_tree, want_unchanged, specific_file_ids,

                   include_root):

    delta = TreeDelta()

    # mutter('start compare_trees')

    for (file_id, path, content_change, versioned, parent_id, name, kind,

         executable) in new_tree._iter_changes(old_tree, want_unchanged, 

                                               specific_file_ids):

        if not include_root and (None, None) == parent_id:

            continue

        assert kind[0] == kind[1] or None in kind

        # the only 'kind change' permitted is creation/deletion

        fully_present = tuple((versioned[x] and kind[x] is not None) for

                              x in range(2))

        if fully_present[0] != fully_present[1]:

            if fully_present[1] is True:

                delta.added.append((path, file_id, kind[1]))

            else:

                assert fully_present[0] is True

                old_path = old_tree.id2path(file_id)

                delta.removed.append((old_path, file_id, kind[0]))

        elif fully_present[0] is False:

            continue

        elif name[0] != name[1] or parent_id[0] != parent_id[1]:

            # If the name changes, or the parent_id changes, we have a rename

            # (if we move a parent, that doesn't count as a rename for the

            # file)

            old_path = old_tree.id2path(file_id)

            delta.renamed.append((old_path,

                                  path,

                                  file_id, 

                                  kind[1],

                                  content_change, 

                                  (executable[0] != executable[1])))

        elif content_change is True or executable[0] != executable[1]:

            delta.modified.append((path, file_id, kind[1],

                                   content_change, 

                                   (executable[0] != executable[1])))

        else:

            delta.unchanged.append((path, file_id, kind[1]))

    delta.removed.sort()

    delta.added.sort()

    delta.renamed.sort()

    # TODO: jam 20060529 These lists shouldn't need to be sorted

    #       since we added them in alphabetical order.

    delta.modified.sort()

    delta.unchanged.sort()

    return delta

class ChangeReporter(object):

    """Report changes between two trees"""

    def __init__(self, old_inventory, output=None):

        self.old_inventory = old_inventory

        self.output = output

        if self.output is None:

            from bzrlib import trace

            self.output = trace.note

    def report(self, file_id, path, versioned, renamed, modified, exe_change,

               kind):

        """Report one change to a file

        :param file_id: The file_id of the file

        :param path: The path the file has (or would have) in the tree (as

            generated by Tree._iter_changes)

        :param versioned: may be 'added', 'removed', or 'unchanged'

        :param renamed: may be True or False

        :param modified: may be 'created', 'deleted', 'kind changed',

            'modified' or 'unchanged'.

        :param exe_change: True if the execute bit has changed

        :param kind: A pair of file kinds, as generated by Tree._iter_changes.

            None indicates no file present.

        """

        modified_map = {'kind changed': 'K',

                        'unchanged': ' ',

                        'created': 'N',

                        'modified': 'M',

                        'deleted': 'D'}

        versioned_map = {'added': '+',

                         'unchanged': ' ',

                         'removed': '-'}

        old_path = ""

        if renamed:

            old_path = self.old_inventory.id2path(file_id)

            rename = "R"

        else:

            rename = versioned_map[versioned]

        if modified == 'kind changed':

            if old_path == "":

                old_path = path

        if modified == 'deleted':

            path += osutils.kind_marker(kind[0])

        else:

            path += osutils.kind_marker(kind[1])

        if old_path != "":

            old_path += "%s => " % osutils.kind_marker(kind[0])

        if exe_change:

            exe = '*'

        else:

            exe = ' '

        self.output("%s%s%s %s%s", rename, modified_map[modified], exe,

                    old_path, path)

def report_changes(change_iterator, reporter):

    """Report the changes from a change iterator.

    This is essentially a translation from low-level to medium-level changes.

    Further processing may be required to produce a human-readable output.

    Unfortunately, some tree-changing operations are very complex

    :change_iterator: an iterator or sequence of changes in the format

        generated by Tree._iter_changes

    :param reporter: The ChangeReporter that will report the changes.

    """

    for (file_id, path, content_change, versioned, parent_id, name, kind,

         executable) in change_iterator:

        exe_change = False

        # files are "renamed" if they are moved or if name changes, as long

        # as it had a value

        if None not in name and (name[0] != name[1] or

                                 parent_id[0] != parent_id[1]):

            renamed = True

        else:

            renamed = False

        if kind[0] != kind[1]:

            if kind[0] is None:

                modified = "created"

            elif kind[1] is None:

                modified = "deleted"

            else:

                modified = "kind changed"

        else:

            if content_change:

                modified = "modified"

            else:

                modified = "unchanged"

            if kind[1] == "file":

                exe_change = (executable[0] != executable[1])

        if versioned[0] != versioned[1]:

            if versioned[0]:

                versioned_change = "removed"

            else:

                versioned_change = "added"

        else:

            versioned_change = "unchanged"

        reporter.report(file_id, path, versioned_change, renamed, modified,

                        exe_change, kind)