Mercurial > hg
view tests/test-empty-dir.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 | 3b165c127690 |
children |
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$ hg init $ echo 123 > a $ hg add a $ hg commit -m "first" a $ mkdir sub $ echo 321 > sub/b $ hg add sub/b $ hg commit -m "second" sub/b $ cat sub/b 321 $ hg co 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cat sub/b 2>/dev/null || echo "sub/b not present" sub/b not present $ test -d sub || echo "sub not present" sub not present