Mercurial > hg
view tests/test-1993.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 | f2719b387380 |
children |
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$ hg init a $ cd a $ echo a > a $ hg ci -Am0 adding a $ echo b > b $ hg ci -Am1 adding b $ hg tag -r0 default warning: tag default conflicts with existing branch name $ hg log changeset: 2:30a83d1e4a1e tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Added tag default for changeset f7b1eb17ad24 changeset: 1:925d80f479bb user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: 1 changeset: 0:f7b1eb17ad24 tag: default user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: 0 $ hg update 'tag(default)' 0 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg parents changeset: 0:f7b1eb17ad24 tag: default user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: 0 $ hg update 'branch(default)' 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg parents changeset: 2:30a83d1e4a1e tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Added tag default for changeset f7b1eb17ad24 $ cd ..