15
15
# along with this program; if not, write to the Free Software
16
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
from sets import Set, ImmutableSet
18
20
from trace import mutter
19
21
from errors import BzrError
22
# TODO: Rather than building a changeset object, we should probably
23
# invoke callbacks on an object. That object can either accumulate a
24
# list, write them out directly, etc etc.
26
def internal_diff(old_label, oldlines, new_label, newlines, to_file):
25
def _diff_one(oldlines, newlines, to_file, **kw):
29
28
# FIXME: difflib is wrong if there is no trailing newline.
74
def external_diff(old_label, oldlines, new_label, newlines, to_file,
76
"""Display a diff by calling out to the external diff program."""
79
if to_file != sys.stdout:
80
raise NotImplementedError("sorry, can't send external diff other than to stdout yet",
83
# make sure our own output is properly ordered before the diff
86
from tempfile import NamedTemporaryFile
89
oldtmpf = NamedTemporaryFile()
90
newtmpf = NamedTemporaryFile()
93
# TODO: perhaps a special case for comparing to or from the empty
94
# sequence; can just use /dev/null on Unix
96
# TODO: if either of the files being compared already exists as a
97
# regular named file (e.g. in the working directory) then we can
98
# compare directly to that, rather than copying it.
100
oldtmpf.writelines(oldlines)
101
newtmpf.writelines(newlines)
109
'--label', old_label,
111
'--label', new_label,
114
# diff only allows one style to be specified; they don't override.
115
# note that some of these take optargs, and the optargs can be
116
# directly appended to the options.
117
# this is only an approximate parser; it doesn't properly understand
119
for s in ['-c', '-u', '-C', '-U',
124
'-y', '--side-by-side',
136
diffcmd.extend(diff_opts)
138
rc = os.spawnvp(os.P_WAIT, 'diff', diffcmd)
140
if rc != 0 and rc != 1:
141
# returns 1 if files differ; that's OK
143
msg = 'signal %d' % (-rc)
145
msg = 'exit code %d' % rc
147
raise BzrError('external diff failed with %s; command: %r' % (rc, diffcmd))
149
oldtmpf.close() # and delete
154
def show_diff(b, revision, specific_files, external_diff_options=None):
155
"""Shortcut for showing the diff to the working tree.
161
None for each, or otherwise the old revision to compare against.
163
The more general form is show_diff_trees(), where the caller
164
supplies any two trees.
70
def show_diff(b, revision, specific_files):
168
73
if revision == None:
173
78
new_tree = b.working_tree()
175
show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
176
external_diff_options)
180
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
181
external_diff_options=None):
182
"""Show in text form the changes from one tree to another.
185
If set, include only changes to these files.
187
external_diff_options
188
If set, use an external GNU diff and pass these options.
191
80
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
200
89
# TODO: Generation of pseudo-diffs for added/deleted files could
201
90
# be usefully made into a much faster special case.
203
if external_diff_options:
204
assert isinstance(external_diff_options, basestring)
205
opts = external_diff_options.split()
206
def diff_file(olab, olines, nlab, nlines, to_file):
207
external_diff(olab, olines, nlab, nlines, to_file, opts)
209
diff_file = internal_diff
212
92
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
213
93
specific_files=specific_files)
215
95
for path, file_id, kind in delta.removed:
216
print >>to_file, '*** removed %s %r' % (kind, path)
96
print '*** removed %s %r' % (kind, path)
217
97
if kind == 'file':
218
diff_file(old_label + path,
219
old_tree.get_file(file_id).readlines(),
98
_diff_one(old_tree.get_file(file_id).readlines(),
101
fromfile=old_label + path,
224
104
for path, file_id, kind in delta.added:
225
print >>to_file, '*** added %s %r' % (kind, path)
105
print '*** added %s %r' % (kind, path)
226
106
if kind == 'file':
230
new_tree.get_file(file_id).readlines(),
108
new_tree.get_file(file_id).readlines(),
111
tofile=new_label + path)
233
113
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
234
print >>to_file, '*** renamed %s %r => %r' % (kind, old_path, new_path)
114
print '*** renamed %s %r => %r' % (kind, old_path, new_path)
235
115
if text_modified:
236
diff_file(old_label + old_path,
237
old_tree.get_file(file_id).readlines(),
238
new_label + new_path,
239
new_tree.get_file(file_id).readlines(),
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)
242
122
for path, file_id, kind in delta.modified:
243
print >>to_file, '*** modified %s %r' % (kind, path)
123
print '*** modified %s %r' % (kind, path)
244
124
if kind == 'file':
245
diff_file(old_label + path,
246
old_tree.get_file(file_id).readlines(),
248
new_tree.get_file(file_id).readlines(),
253
class TreeDelta(object):
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)
254
134
"""Describes changes from one tree to another.
256
136
Contains four lists:
284
160
self.modified = []
285
161
self.unchanged = []
287
def __eq__(self, other):
288
if not isinstance(other, TreeDelta):
290
return self.added == other.added \
291
and self.removed == other.removed \
292
and self.renamed == other.renamed \
293
and self.modified == other.modified \
294
and self.unchanged == other.unchanged
296
def __ne__(self, other):
297
return not (self == other)
300
return "TreeDelta(added=%r, removed=%r, renamed=%r, modified=%r," \
301
" unchanged=%r)" % (self.added, self.removed, self.renamed,
302
self.modified, self.unchanged)
304
def has_changed(self):
305
changes = len(self.added) + len(self.removed) + len(self.renamed)
306
changes += len(self.modified)
307
return (changes != 0)
309
def touches_file_id(self, file_id):
310
"""Return True if file_id is modified by this delta."""
311
for l in self.added, self.removed, self.modified:
315
for v in self.renamed:
321
163
def show(self, to_file, show_ids=False, show_unchanged=False):
322
164
def show_list(files):
323
165
for path, fid, kind in files: