Mercurial > hg
view tests/test-merge5.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 | 6da47b655d97 |
children | 76df01e56e7f |
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$ hg init $ echo This is file a1 > a $ echo This is file b1 > b $ hg add a b $ hg commit -m "commit #0" $ echo This is file b22 > b $ hg commit -m "comment #1" $ hg update 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ rm b $ hg commit -A -m "comment #2" removing b created new head $ hg update 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg update abort: crosses branches (merge branches or update --check to force update) [255] $ rm b $ hg update -c abort: uncommitted local changes [255] $ hg revert b $ hg update -c 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mv a c In theory, we shouldn't need the "-y" below, but it prevents this test from hanging when "hg update" erroneously prompts the user for "keep or delete". Should abort: $ hg update -y 1 abort: crosses branches (merge branches or use --clean to discard changes) [255] $ mv c a Should succeed: $ hg update -y 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved