comparison tests/test-copies-in-changeset.t @ 46718:ba8e508a8e69

sidedata-exchange: rewrite sidedata on-the-fly whenever possible

When a A exchanges with B, the difference of their supported sidedata categories
is made, and the responsibility is always with the client to generated it:
    - If A pushes to B and B requires category `foo` that A does not have, A
      will need to generate it when sending it to B.
    - If A pulls from B and A needs category `foo`, it will generate `foo`
      before the end of the transaction.
    - Any category that is not required is removed. If peers are not compatible,
      abort.

It is forbidden to rewrite sidedata for a rev that already has sidedata, since
that would introduce unreachable (garbage) data in the data file, something
we're not prepared for yet.

Differential Revision: https://phab.mercurial-scm.org/D10032

46717:502e795b55ac

  
#else
  $ hg ci --amend -m 'copy a to j, v2'
  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-*-amend.hg (glob)
  $ hg debugsidedata -c -v -- -1
  1 sidedata entries (missing-correct-output !)
   entry-0014 size 24 (missing-correct-output !)
    '\x00\x00\x00\x02\x00\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x02\x00\x00\x00\x00aj' (missing-correct-output !)
#endif
  $ hg showcopies --config experimental.copies.read-from=filelog-only
  a -> j (sidedata missing-correct-output !)
  a -> j (no-sidedata !)
The entries should be written to extras even if they're empty (so the client
won't have to fall back to reading from filelogs)
  $ echo x >> j
#if extra
  $ hg ci -m 'modify j' --config experimental.copies.write-to=compatibility

  rebasing 2:* tip "rename a to b" (glob)
  merging a and b to b
  saved backup bundle to $TESTTMP/rebase-rename/.hg/strip-backup/*-*-rebase.hg (glob)
  $ hg st --change . --copies
  A b
    a (sidedata missing-correct-output !)
    a (no-sidedata !)
  R a
  $ cd ..

Test splitting a commit

46718:ba8e508a8e69

  
#else
  $ hg ci --amend -m 'copy a to j, v2'
  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-*-amend.hg (glob)
  $ hg debugsidedata -c -v -- -1
  1 sidedata entries
   entry-0014 size 24
    '\x00\x00\x00\x02\x00\x00\x00\x00\x01\x00\x00\x00\x00\x06\x00\x00\x00\x02\x00\x00\x00\x00aj'
#endif
  $ hg showcopies --config experimental.copies.read-from=filelog-only
  a -> j
The entries should be written to extras even if they're empty (so the client
won't have to fall back to reading from filelogs)
  $ echo x >> j
#if extra
  $ hg ci -m 'modify j' --config experimental.copies.write-to=compatibility

  rebasing 2:* tip "rename a to b" (glob)
  merging a and b to b
  saved backup bundle to $TESTTMP/rebase-rename/.hg/strip-backup/*-*-rebase.hg (glob)
  $ hg st --change . --copies
  A b
    a
  R a
  $ cd ..

Test splitting a commit