← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/diff.py

  • Committer: Robert Collins
  • Date: 2006-01-05 22:30:59 UTC
  • mto: (1534.1.4 integration)
  • mto: This revision was merged to the branch mainline in revision 1536.
  • Revision ID: robertc@robertcollins.net-20060105223059-a8b64f7b47cf12fb
 * bzrlib.osutils.safe_unicode now exists to provide parameter coercion
   for functions that need unicode strings. (Robert Collins)

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/diff.py
1
 
#! /usr/bin/env python
2
1
# -*- coding: UTF-8 -*-
3
2
 
4
3
# This program is free software; you can redistribute it and/or modify
23
22
# invoke callbacks on an object.  That object can either accumulate a
24
23
# list, write them out directly, etc etc.
25
24
 
26
 
def internal_diff(old_label, oldlines, new_label, newlines, to_file):
 
25
def internal_diff(old_filename, oldlines, new_filename, newlines, to_file):
27
26
    import difflib
28
27
    
29
28
    # FIXME: difflib is wrong if there is no trailing newline.
43
42
        return
44
43
 
45
44
    ud = difflib.unified_diff(oldlines, newlines,
46
 
                              fromfile=old_label, tofile=new_label)
 
45
                              fromfile=old_filename+'\t', 
 
46
                              tofile=new_filename+'\t')
47
47
 
 
48
    ud = list(ud)
48
49
    # work-around for difflib being too smart for its own good
49
50
    # if /dev/null is "1,0", patch won't recognize it as /dev/null
50
51
    if not oldlines:
51
 
        ud = list(ud)
52
52
        ud[2] = ud[2].replace('-1,0', '-0,0')
53
53
    elif not newlines:
54
 
        ud = list(ud)
55
54
        ud[2] = ud[2].replace('+1,0', '+0,0')
 
55
    # work around for difflib emitting random spaces after the label
 
56
    ud[0] = ud[0][:-2] + '\n'
 
57
    ud[1] = ud[1][:-2] + '\n'
56
58
 
57
59
    for line in ud:
58
60
        to_file.write(line)
61
63
    print >>to_file
62
64
 
63
65
 
64
 
 
65
 
 
66
 
def external_diff(old_label, oldlines, new_label, newlines, to_file,
 
66
def external_diff(old_filename, oldlines, new_filename, newlines, to_file,
67
67
                  diff_opts):
68
68
    """Display a diff by calling out to the external diff program."""
69
69
    import sys
98
98
        if not diff_opts:
99
99
            diff_opts = []
100
100
        diffcmd = ['diff',
101
 
                   '--label', old_label,
 
101
                   '--label', old_filename+'\t',
102
102
                   oldtmpf.name,
103
 
                   '--label', new_label,
 
103
                   '--label', new_filename+'\t',
104
104
                   newtmpf.name]
105
105
 
106
106
        # diff only allows one style to be specified; they don't override.
140
140
    finally:
141
141
        oldtmpf.close()                 # and delete
142
142
        newtmpf.close()
143
 
    
144
 
 
145
 
 
146
 
def show_diff(b, revision, specific_files, external_diff_options=None,
147
 
              revision2=None):
 
143
 
 
144
def show_diff(b, from_spec, specific_files, external_diff_options=None,
 
145
              revision2=None, output=None, b2=None):
148
146
    """Shortcut for showing the diff to the working tree.
149
147
 
150
148
    b
151
149
        Branch.
152
150
 
153
151
    revision
154
 
        None for each, or otherwise the old revision to compare against.
 
152
        None for 'basis tree', or otherwise the old revision to compare against.
155
153
    
156
154
    The more general form is show_diff_trees(), where the caller
157
155
    supplies any two trees.
158
156
    """
159
 
    import sys
160
 
 
161
 
    if revision == None:
162
 
        old_tree = b.basis_tree()
163
 
    else:
164
 
        old_tree = b.revision_tree(b.lookup_revision(revision))
165
 
 
166
 
    if revision2 == None:
167
 
        new_tree = b.working_tree()
168
 
    else:
169
 
        new_tree = b.revision_tree(b.lookup_revision(revision2))
170
 
 
171
 
    show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
172
 
                    external_diff_options)
 
157
    if output is None:
 
158
        import sys
 
159
        output = sys.stdout
 
160
 
 
161
    if from_spec is None:
 
162
        if b2 is None:
 
163
            old_tree = b.basis_tree()
 
164
        else:
 
165
            old_tree = b.working_tree()
 
166
    else:
 
167
        old_tree = b.revision_tree(from_spec.in_history(b).rev_id)
 
168
 
 
169
    if revision2 is None:
 
170
        if b2 is None:
 
171
            new_tree = b.working_tree()
 
172
        else:
 
173
            new_tree = b2.working_tree()
 
174
    else:
 
175
        new_tree = b.revision_tree(revision2.in_history(b).rev_id)
 
176
 
 
177
    return show_diff_trees(old_tree, new_tree, output, specific_files,
 
178
                           external_diff_options)
173
179
 
174
180
 
175
181
 
208
214
    delta = compare_trees(old_tree, new_tree, want_unchanged=False,
209
215
                          specific_files=specific_files)
210
216
 
 
217
    has_changes = 0
211
218
    for path, file_id, kind in delta.removed:
212
 
        print >>to_file, '*** removed %s %r' % (kind, path)
213
 
        if kind == 'file':
214
 
            diff_file(old_label + path,
215
 
                      old_tree.get_file(file_id).readlines(),
216
 
                      DEVNULL, 
217
 
                      [],
218
 
                      to_file)
219
 
 
 
219
        has_changes = 1
 
220
        print >>to_file, '=== removed %s %r' % (kind, path)
 
221
        old_tree.inventory[file_id].diff(diff_file, old_label + path, old_tree,
 
222
                                         DEVNULL, None, None, to_file)
220
223
    for path, file_id, kind in delta.added:
221
 
        print >>to_file, '*** added %s %r' % (kind, path)
222
 
        if kind == 'file':
223
 
            diff_file(DEVNULL,
224
 
                      [],
225
 
                      new_label + path,
226
 
                      new_tree.get_file(file_id).readlines(),
227
 
                      to_file)
228
 
 
229
 
    for old_path, new_path, file_id, kind, text_modified in delta.renamed:
230
 
        print >>to_file, '*** renamed %s %r => %r' % (kind, old_path, new_path)
 
224
        has_changes = 1
 
225
        print >>to_file, '=== added %s %r' % (kind, path)
 
226
        new_tree.inventory[file_id].diff(diff_file, new_label + path, new_tree,
 
227
                                         DEVNULL, None, None, to_file, 
 
228
                                         reverse=True)
 
229
    for (old_path, new_path, file_id, kind,
 
230
         text_modified, meta_modified) in delta.renamed:
 
231
        has_changes = 1
 
232
        prop_str = get_prop_change(meta_modified)
 
233
        print >>to_file, '=== renamed %s %r => %r%s' % (
 
234
                          kind, old_path, new_path, prop_str)
 
235
        _maybe_diff_file_or_symlink(old_label, old_path, old_tree, file_id,
 
236
                                    new_label, new_path, new_tree,
 
237
                                    text_modified, kind, to_file, diff_file)
 
238
    for path, file_id, kind, text_modified, meta_modified in delta.modified:
 
239
        has_changes = 1
 
240
        prop_str = get_prop_change(meta_modified)
 
241
        print >>to_file, '=== modified %s %r%s' % (kind, path, prop_str)
231
242
        if text_modified:
232
 
            diff_file(old_label + old_path,
233
 
                      old_tree.get_file(file_id).readlines(),
234
 
                      new_label + new_path,
235
 
                      new_tree.get_file(file_id).readlines(),
236
 
                      to_file)
237
 
 
238
 
    for path, file_id, kind in delta.modified:
239
 
        print >>to_file, '*** modified %s %r' % (kind, path)
240
 
        if kind == 'file':
241
 
            diff_file(old_label + path,
242
 
                      old_tree.get_file(file_id).readlines(),
243
 
                      new_label + path,
244
 
                      new_tree.get_file(file_id).readlines(),
245
 
                      to_file)
246
 
 
247
 
 
248
 
 
249
 
 
250
 
 
 
243
            _maybe_diff_file_or_symlink(old_label, path, old_tree, file_id,
 
244
                                        new_label, path, new_tree,
 
245
                                        True, kind, to_file, diff_file)
 
246
    return has_changes
 
247
    
 
248
 
 
249
def get_prop_change(meta_modified):
 
250
    if meta_modified:
 
251
        return " (properties changed)"
 
252
    else:
 
253
        return  ""
 
254
 
 
255
 
 
256
def _maybe_diff_file_or_symlink(old_label, old_path, old_tree, file_id,
 
257
                                new_label, new_path, new_tree, text_modified,
 
258
                                kind, to_file, diff_file):
 
259
    if text_modified:
 
260
        new_entry = new_tree.inventory[file_id]
 
261
        old_tree.inventory[file_id].diff(diff_file,
 
262
                                         old_label + old_path, old_tree,
 
263
                                         new_label + new_path, new_entry, 
 
264
                                         new_tree, to_file)