41
41
if not oldlines and not newlines:
44
ud = difflib.unified_diff(oldlines, newlines,
45
fromfile=old_label, tofile=new_label)
46
if oldlines and (oldlines[-1][-1] != '\n'):
49
if newlines and (newlines[-1][-1] != '\n'):
53
ud = difflib.unified_diff(oldlines, newlines, **kw)
48
55
# work-around for difflib being too smart for its own good
49
56
# if /dev/null is "1,0", patch won't recognize it as /dev/null
51
59
ud[2] = ud[2].replace('-1,0', '-0,0')
53
62
ud[2] = ud[2].replace('+1,0', '+0,0')
54
# work around for difflib emitting random spaces after the label
55
ud[0] = ud[0][:-2] + '\n'
56
ud[1] = ud[1][:-2] + '\n'
60
if not line.endswith('\n'):
61
to_file.write("\n\\ No newline at end of file\n")
64
to_file.writelines(ud)
66
print >>to_file, "\\ No newline at end of file"
67
def external_diff(old_label, oldlines, new_label, newlines, to_file,
69
"""Display a diff by calling out to the external diff program."""
70
def show_diff(b, revision, specific_files):
72
if to_file != sys.stdout:
73
raise NotImplementedError("sorry, can't send external diff other than to stdout yet",
76
# make sure our own output is properly ordered before the diff
79
from tempfile import NamedTemporaryFile
82
oldtmpf = NamedTemporaryFile()
83
newtmpf = NamedTemporaryFile()
86
# TODO: perhaps a special case for comparing to or from the empty
87
# sequence; can just use /dev/null on Unix
89
# TODO: if either of the files being compared already exists as a
90
# regular named file (e.g. in the working directory) then we can
91
# compare directly to that, rather than copying it.
93
oldtmpf.writelines(oldlines)
94
newtmpf.writelines(newlines)
102
'--label', old_label,
104
'--label', new_label,
107
# diff only allows one style to be specified; they don't override.
108
# note that some of these take optargs, and the optargs can be
109
# directly appended to the options.
110
# this is only an approximate parser; it doesn't properly understand
112
for s in ['-c', '-u', '-C', '-U',
117
'-y', '--side-by-side',
129
diffcmd.extend(diff_opts)
131
rc = os.spawnvp(os.P_WAIT, 'diff', diffcmd)
133
if rc != 0 and rc != 1:
134
# returns 1 if files differ; that's OK
136
msg = 'signal %d' % (-rc)
138
msg = 'exit code %d' % rc
140
raise BzrError('external diff failed with %s; command: %r' % (rc, diffcmd))
142
oldtmpf.close() # and delete
147
def show_diff(b, revision, specific_files, external_diff_options=None,
148
revision2=None, output=None):
149
"""Shortcut for showing the diff to the working tree.
155
None for each, or otherwise the old revision to compare against.
157
The more general form is show_diff_trees(), where the caller
158
supplies any two trees.
164
73
if revision == None:
165
74
old_tree = b.basis_tree()
167
76
old_tree = b.revision_tree(b.lookup_revision(revision))
169
if revision2 == None:
170
new_tree = b.working_tree()
172
new_tree = b.revision_tree(b.lookup_revision(revision2))
174
show_diff_trees(old_tree, new_tree, output, specific_files,
175
external_diff_options)
179
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
180
external_diff_options=None):
181
"""Show in text form the changes from one tree to another.
184
If set, include only changes to these files.
186
external_diff_options
187
If set, use an external GNU diff and pass these options.
78
new_tree = b.working_tree()
190
80
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
199
89
# TODO: Generation of pseudo-diffs for added/deleted files could
200
90
# be usefully made into a much faster special case.
202
if external_diff_options:
203
assert isinstance(external_diff_options, basestring)
204
opts = external_diff_options.split()
205
def diff_file(olab, olines, nlab, nlines, to_file):
206
external_diff(olab, olines, nlab, nlines, to_file, opts)
208
diff_file = internal_diff
211
92
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
212
93
specific_files=specific_files)
214
95
for path, file_id, kind in delta.removed:
215
print >>to_file, '=== removed %s %r' % (kind, path)
96
print '*** removed %s %r' % (kind, path)
216
97
if kind == 'file':
217
diff_file(old_label + path,
218
old_tree.get_file(file_id).readlines(),
98
_diff_one(old_tree.get_file(file_id).readlines(),
101
fromfile=old_label + path,
223
104
for path, file_id, kind in delta.added:
224
print >>to_file, '=== added %s %r' % (kind, path)
105
print '*** added %s %r' % (kind, path)
225
106
if kind == 'file':
229
new_tree.get_file(file_id).readlines(),
108
new_tree.get_file(file_id).readlines(),
111
tofile=new_label + path)
232
113
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
233
print >>to_file, '=== renamed %s %r => %r' % (kind, old_path, new_path)
114
print '*** renamed %s %r => %r' % (kind, old_path, new_path)
234
115
if text_modified:
235
diff_file(old_label + old_path,
236
old_tree.get_file(file_id).readlines(),
237
new_label + new_path,
238
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)
241
122
for path, file_id, kind in delta.modified:
242
print >>to_file, '=== modified %s %r' % (kind, path)
123
print '*** modified %s %r' % (kind, path)
243
124
if kind == 'file':
244
diff_file(old_label + path,
245
old_tree.get_file(file_id).readlines(),
247
new_tree.get_file(file_id).readlines(),
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, specific_files=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
217
If true, only check for changes to specified names or
221
from osutils import is_inside_any
223
old_inv = old_tree.inventory
224
new_inv = new_tree.inventory
226
mutter('start compare_trees')
228
# TODO: match for specific files can be rather smarter by finding
229
# the IDs of those files up front and then considering only that.
231
for file_id in old_tree:
232
if file_id in new_tree:
233
kind = old_inv.get_file_kind(file_id)
234
assert kind == new_inv.get_file_kind(file_id)
236
assert kind in ('file', 'directory', 'symlink', 'root_directory'), \
237
'invalid file kind %r' % kind
239
if kind == 'root_directory':
242
old_path = old_inv.id2path(file_id)
243
new_path = new_inv.id2path(file_id)
246
if (not is_inside_any(specific_files, old_path)
247
and not is_inside_any(specific_files, new_path)):
251
old_sha1 = old_tree.get_file_sha1(file_id)
252
new_sha1 = new_tree.get_file_sha1(file_id)
253
text_modified = (old_sha1 != new_sha1)
255
## mutter("no text to check for %r %r" % (file_id, kind))
256
text_modified = False
258
# TODO: Can possibly avoid calculating path strings if the
259
# two files are unchanged and their names and parents are
260
# the same and the parents are unchanged all the way up.
261
# May not be worthwhile.
263
if old_path != new_path:
264
delta.renamed.append((old_path, new_path, file_id, kind,
267
delta.modified.append((new_path, file_id, kind))
269
delta.unchanged.append((new_path, file_id, kind))
271
old_path = old_inv.id2path(file_id)
273
if not is_inside_any(specific_files, old_path):
275
delta.removed.append((old_path, file_id, kind))
277
mutter('start looking for new files')
278
for file_id in new_inv:
279
if file_id in old_inv:
281
new_path = new_inv.id2path(file_id)
283
if not is_inside_any(specific_files, new_path):
285
kind = new_inv.get_file_kind(file_id)
286
delta.added.append((new_path, file_id, kind))
291
delta.modified.sort()
292
delta.unchanged.sort()