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checkcopies: add a sanity check against false-positive copies
authorGábor Stefanik <gabor.stefanik@nng.com>
Wed, 12 Oct 2016 21:33:45 +0200
changeset 30188 8a864844d5a0
parent 30187 3e86261bf110
child 30192 509d29255c04
checkcopies: add a sanity check against false-positive copies When grafting a copy backwards through a rename, a copy is wrongly detected, which causes the graft to be applied inappropriately, in a destructive way. Make sure that the old file name really exists in the common ancestor, and bail out if it doesn't. This fixes the aggravated case of bug 5343, although the basic issue (failure to duplicate the copy information) still occurs.
mercurial/copies.py file | annotate | diff | comparison | revisions
tests/test-graft.t file | annotate | diff | comparison | revisions 
--- a/mercurial/copies.py	Sun Oct 16 10:38:52 2016 -0700
+++ b/mercurial/copies.py	Wed Oct 12 21:33:45 2016 +0200
@@ -543,7 +543,8 @@
         # unrelated to the droids we are looking for.
         cr = _related(oc, c2, base.rev())
         if cr and (of == f or of == c2.path()): # non-divergent
-            data['copy'][f] = of
+            if of in mb:
+                data['copy'][f] = of
             return
 
     if of in mb:
--- a/tests/test-graft.t	Sun Oct 16 10:38:52 2016 -0700
+++ b/tests/test-graft.t	Wed Oct 12 21:33:45 2016 +0200
@@ -427,8 +427,8 @@
   $ hg graft 3 --log -u foo
   grafting 3:4c60f11aa304 "3"
   warning: can't find ancestor for 'c' copied from 'b'!
-  $ hg log --template '{rev} {parents} {desc}\n' -r tip
-  14 1:5d205f8b35b6  3
+  $ hg log --template '{rev}:{node|short} {parents} {desc}\n' -r tip
+  14:0c921c65ef1e 1:5d205f8b35b6  3
   (grafted from 4c60f11aa304a54ae1c199feb94e7fc771e51ed8)
 
 Resolve conflicted graft
@@ -620,7 +620,7 @@
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
-  changeset:   14:f64defefacee
+  changeset:   14:0c921c65ef1e
   parent:      1:5d205f8b35b6
   user:        foo
   date:        Thu Jan 01 00:00:00 1970 +0000
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