Mercurial > hg
view tests/test-diff-copy-depth.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 | bca69641de61 |
children |
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$ for i in aaa zzz; do > hg init t > cd t > > echo > echo "-- With $i" > > touch file > hg add file > hg ci -m "Add" > > hg cp file $i > hg ci -m "a -> $i" > > hg cp $i other-file > echo "different" >> $i > hg ci -m "$i -> other-file" > > hg cp other-file somename > > echo "Status": > hg st -C > echo > echo "Diff:" > hg diff -g > > cd .. > rm -rf t > done -- With aaa Status: A somename other-file Diff: diff --git a/other-file b/somename copy from other-file copy to somename -- With zzz Status: A somename other-file Diff: diff --git a/other-file b/somename copy from other-file copy to somename