Mercurial > hg
view tests/test-diff-subdir.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 | e22248f6d257 |
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$ hg init $ mkdir alpha $ touch alpha/one $ mkdir beta $ touch beta/two $ hg add alpha/one beta/two $ hg ci -m "start" $ echo 1 > alpha/one $ echo 2 > beta/two everything $ hg diff --nodates diff -r 7d5ef1aea329 alpha/one --- a/alpha/one +++ b/alpha/one @@ -0,0 +1,1 @@ +1 diff -r 7d5ef1aea329 beta/two --- a/beta/two +++ b/beta/two @@ -0,0 +1,1 @@ +2 beta only $ hg diff --nodates beta diff -r 7d5ef1aea329 beta/two --- a/beta/two +++ b/beta/two @@ -0,0 +1,1 @@ +2 inside beta $ cd beta $ hg diff --nodates . diff -r 7d5ef1aea329 beta/two --- a/beta/two +++ b/beta/two @@ -0,0 +1,1 @@ +2 $ cd ..