comparison tests/test-copies-chain-merge.t @ 45472:14be07d5603c

copy-tracing: test case where a merge reverted a file deletion

This case is currently broken for commit centric copy tracing. So we add an
official case for it with a note about it being broken.

Fixing it will requires multiples change in code related to merge, commit and
copy tracing, so we introduce it beforehand for simplicity.

Also, I have been sitting on this test for 3 months so I would rather have it
upstream.

45471:4b582a93316a

  A d
  $ hg status --copies --rev 'desc("c-1")' --rev 'desc("mGCm-0")'
  A d
  $ hg status --copies --rev 'desc("g-1")' --rev 'desc("mCGm-0")'
  $ hg status --copies --rev 'desc("g-1")' --rev 'desc("mGCm-0")'

45472:14be07d5603c

  A d
  $ hg status --copies --rev 'desc("c-1")' --rev 'desc("mGCm-0")'
  A d
  $ hg status --copies --rev 'desc("g-1")' --rev 'desc("mCGm-0")'
  $ hg status --copies --rev 'desc("g-1")' --rev 'desc("mGCm-0")'


Comparing with merge restoring an untouched deleted file
--------------------------------------------------------

Merge:
- one removing a file (d)
- one leaving the file untouched
- the merge actively restore the file to the same content.

In this case, the file keep on living after the merge. So we should not drop its
copy tracing chain.

  $ hg up 'desc("c-1")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge 'desc("b-1")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg revert --rev 'desc("b-1")' d
  $ hg ci -m "mCB-revert-m-0"
  created new head

  $ hg up 'desc("b-1")'
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg merge 'desc("c-1")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg revert --rev 'desc("b-1")' d
  $ hg ci -m "mBC-revert-m-0"
  created new head

  $ hg log -G --rev '::(desc("mCB-revert-m")+desc("mBC-revert-m"))'
  @    33 mBC-revert-m-0
  |\
  +---o  32 mCB-revert-m-0
  | |/
  | o  6 c-1 delete d
  | |
  o |  5 b-1: b update
  |/
  o  2 i-2: c -move-> d
  |
  o  1 i-1: a -move-> c
  |
  o  0 i-0 initial commit: a b h
  

BROKEN: 'a' should be the the source of 'd' in the changeset centric algorithm too

  $ hg status --copies --rev 'desc("i-0")' --rev 'desc("mCB-revert-m-0")'
  M b
  A d
    a (filelog !)
  R a
  $ hg status --copies --rev 'desc("i-0")' --rev 'desc("mBC-revert-m-0")'
  M b
  A d
    a (filelog !)
  R a
  $ hg status --copies --rev 'desc("c-1")' --rev 'desc("mCB-revert-m-0")'
  M b
  A d
  $ hg status --copies --rev 'desc("c-1")' --rev 'desc("mBC-revert-m-0")'
  M b
  A d
  $ hg status --copies --rev 'desc("b-1")' --rev 'desc("mCB-revert-m-0")'
  $ hg status --copies --rev 'desc("b-1")' --rev 'desc("mBC-revert-m-0")'