Mercurial > hg
diff tests/test-mv-cp-st-diff.t @ 18136:f23dea2b296e
copies: do not track backward copies, only renames (issue3739)
The inverse of a rename is a rename, but the inverse of a copy is not a copy.
Presenting it as such -- in particular, stuffing it into the same dict as real
copies -- causes bugs because other code starts believing the inverse copies
are real.
The only test whose output changes is test-mv-cp-st-diff.t. When a backwards
status -C command is run where a copy is involved, the inverse copy (which was
hitherto presented as a real copy) is no longer displayed.
Keeping track of inverse copies is useful in some situations -- composability
of diffs, for example, since adding "a" followed by an inverse copy "b" to "a"
is equivalent to a rename "b" to "a". However, representing them would require
a more complex data structure than the same dict in which real copies are also
stored.
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Wed, 26 Dec 2012 15:04:07 -0800 |
parents | bc694d78d843 |
children | 243ea5ffdf31 |
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--- a/tests/test-mv-cp-st-diff.t Wed Dec 26 15:03:58 2012 -0800 +++ b/tests/test-mv-cp-st-diff.t Wed Dec 26 15:04:07 2012 -0800 @@ -670,7 +670,6 @@ % hg st -C --rev . --rev 0 M a - b R b % hg diff --git --rev . --rev 0 @@ -728,7 +727,6 @@ % hg st -C --rev . --rev 2 M a - b A x/y R b @@ -1072,7 +1070,6 @@ % hg st -C --rev . --rev 0 M a - b R b R c @@ -1148,7 +1145,6 @@ % hg st -C --rev . --rev 2 M a - b A x/y R b R c