2
# -*- coding: UTF-8 -*-
4
# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License as published by
6
# the Free Software Foundation; either version 2 of the License, or
7
# (at your option) any later version.
9
# This program is distributed in the hope that it will be useful,
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
# GNU General Public License for more details.
14
# You should have received a copy of the GNU General Public License
15
# along with this program; if not, write to the Free Software
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
from sets import Set, ImmutableSet
20
from trace import mutter
21
from errors import BzrError
25
def _diff_one(oldlines, newlines, to_file, **kw):
28
# FIXME: difflib is wrong if there is no trailing newline.
29
# The syntax used by patch seems to be "\ No newline at
30
# end of file" following the last diff line from that
31
# file. This is not trivial to insert into the
32
# unified_diff output and it might be better to just fix
33
# or replace that function.
35
# In the meantime we at least make sure the patch isn't
39
# Special workaround for Python2.3, where difflib fails if
40
# both sequences are empty.
41
if not oldlines and not newlines:
46
if oldlines and (oldlines[-1][-1] != '\n'):
49
if newlines and (newlines[-1][-1] != '\n'):
53
ud = difflib.unified_diff(oldlines, newlines, **kw)
55
# work-around for difflib being too smart for its own good
56
# if /dev/null is "1,0", patch won't recognize it as /dev/null
59
ud[2] = ud[2].replace('-1,0', '-0,0')
62
ud[2] = ud[2].replace('+1,0', '+0,0')
64
to_file.writelines(ud)
66
print >>to_file, "\\ No newline at end of file"
70
def show_diff(b, revision, file_list):
74
old_tree = b.basis_tree()
76
old_tree = b.revision_tree(b.lookup_revision(revision))
78
new_tree = b.working_tree()
80
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
85
# Windows users, don't panic about this filename -- it is a
86
# special signal to GNU patch that the file should be created or
87
# deleted respectively.
89
# TODO: Generation of pseudo-diffs for added/deleted files could
90
# be usefully made into a much faster special case.
92
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
95
for path, file_id, kind in delta.removed:
96
print '*** removed %s %r' % (kind, path)
98
_diff_one(old_tree.get_file(file_id).readlines(),
101
fromfile=old_label + path,
104
for path, file_id, kind in delta.added:
105
print '*** added %s %r' % (kind, path)
108
new_tree.get_file(file_id).readlines(),
111
tofile=new_label + path)
113
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
114
print '*** renamed %s %r => %r' % (kind, old_path, new_path)
116
_diff_one(old_tree.get_file(file_id).readlines(),
117
new_tree.get_file(file_id).readlines(),
119
fromfile=old_label + old_path,
120
tofile=new_label + new_path)
122
for path, file_id, kind in delta.modified:
123
print '*** modified %s %r' % (kind, path)
125
_diff_one(old_tree.get_file(file_id).readlines(),
126
new_tree.get_file(file_id).readlines(),
128
fromfile=old_label + path,
129
tofile=new_label + path)
134
"""Describes changes from one tree to another.
143
(oldpath, newpath, id, kind, text_modified)
149
Each id is listed only once.
151
Files that are both modified and renamed are listed only in
152
renamed, with the text_modified flag true.
154
The lists are normally sorted when the delta is created.
163
def show(self, to_file, show_ids=False, show_unchanged=False):
164
def show_list(files):
165
for path, fid, kind in files:
166
if kind == 'directory':
168
elif kind == 'symlink':
172
print >>to_file, ' %-30s %s' % (path, fid)
174
print >>to_file, ' ', path
177
print >>to_file, 'removed:'
178
show_list(self.removed)
181
print >>to_file, 'added:'
182
show_list(self.added)
185
print >>to_file, 'renamed:'
186
for oldpath, newpath, fid, kind, text_modified in self.renamed:
188
print >>to_file, ' %s => %s %s' % (oldpath, newpath, fid)
190
print >>to_file, ' %s => %s' % (oldpath, newpath)
193
print >>to_file, 'modified:'
194
show_list(self.modified)
196
if show_unchanged and self.unchanged:
197
print >>to_file, 'unchanged:'
198
show_list(self.unchanged)
202
def compare_trees(old_tree, new_tree, want_unchanged, file_list=None):
203
"""Describe changes from one tree to another.
205
Returns a TreeDelta with details of added, modified, renamed, and
208
The root entry is specifically exempt.
210
This only considers versioned files.
213
If true, also list files unchanged from one version to the next.
216
If true, only check for changes to specified files.
218
old_inv = old_tree.inventory
219
new_inv = new_tree.inventory
221
mutter('start compare_trees')
224
file_list = ImmutableSet(file_list)
226
for file_id in old_tree:
227
if file_id in new_tree:
228
kind = old_inv.get_file_kind(file_id)
229
assert kind == new_inv.get_file_kind(file_id)
231
assert kind in ('file', 'directory', 'symlink', 'root_directory'), \
232
'invalid file kind %r' % kind
234
if kind == 'root_directory':
237
old_path = old_inv.id2path(file_id)
238
new_path = new_inv.id2path(file_id)
241
if (old_path not in file_list
242
and new_path not in file_list):
246
old_sha1 = old_tree.get_file_sha1(file_id)
247
new_sha1 = new_tree.get_file_sha1(file_id)
248
text_modified = (old_sha1 != new_sha1)
250
## mutter("no text to check for %r %r" % (file_id, kind))
251
text_modified = False
253
# TODO: Can possibly avoid calculating path strings if the
254
# two files are unchanged and their names and parents are
255
# the same and the parents are unchanged all the way up.
256
# May not be worthwhile.
258
if old_path != new_path:
259
delta.renamed.append((old_path, new_path, file_id, kind,
262
delta.modified.append((new_path, file_id, kind))
264
delta.unchanged.append((new_path, file_id, kind))
266
delta.removed.append((old_inv.id2path(file_id), file_id, kind))
268
mutter('start looking for new files')
269
for file_id in new_inv:
270
if file_id in old_inv:
272
new_path = new_inv.id2path(file_id)
274
if new_path not in file_list:
276
kind = new_inv.get_file_kind(file_id)
277
delta.added.append((new_path, file_id, kind))
282
delta.modified.sort()
283
delta.unchanged.sort()
added
removed
bzrlib/diff.py
