tests/test-rebase-transaction.t

interfaces: introduce and use a protocol class for the `charencoding` module

See f2832de2a46c for details when this was done for the `bdiff` module.

This lets us dump the hack where the `pure` implementation was imported during
the type checking phase to provide signatures for the module methods it
provides.  Now the protocol classes are starting to shine, because these methods
are provided by `pure.charencoding` and `cext.parsers`, and references to
`cffi.charencoding` and `cext.charencoding` are forwarded to them as appropriate
by the `policy` module.  But none of that matters, as long as the module
returned provides the listed methods.

The interface was copy/pasted from the `pure` module, but `jsonescapeu8fallback`
is omitted because it is accessed from the `pure` module directly when the
escaping fails in the primary module's `jsonescapeu8()`.

#testcases continuecommand continueflag
Rebasing using a single transaction

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > rebase=
  > drawdag=$TESTDIR/drawdag.py
  > 
  > [rebase]
  > singletransaction=True
  > 
  > [phases]
  > publish=False
  > 
  > [alias]
  > tglog = log -G --template "{rev}: {desc}"
  > EOF

#if continueflag
  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > continue = rebase --continue
  > EOF
#endif

Check that a simple rebase works

  $ hg init simple && cd simple
  $ hg debugdrawdag <<'EOF'
  >   Z
  >   |
  >   | D
  >   | |
  >   | C
  >   | |
  >   Y B
  >   |/
  >   A
  > EOF
- We should only see one status stored message. It comes from the start.
  $ hg rebase --debug -b D -d Z | grep 'status stored'
  rebase status stored
  $ hg tglog
  o  5: D
  |
  o  4: C
  |
  o  3: B
  |
  o  2: Z
  |
  o  1: Y
  |
  o  0: A
  
  $ cd ..

Check that --collapse works

  $ hg init collapse && cd collapse
  $ hg debugdrawdag <<'EOF'
  >   Z
  >   |
  >   | D
  >   | |
  >   | C
  >   | |
  >   Y B
  >   |/
  >   A
  > EOF
- We should only see two status stored messages. One from the start, one from
- cmdutil.commitforceeditor() which forces tr.writepending()
  $ hg rebase --collapse --debug -b D -d Z | grep 'status stored'
  rebase status stored
  rebase status stored
  $ hg tglog
  o  3: Collapsed revision
  |  * B
  |  * C
  |  * D
  o  2: Z
  |
  o  1: Y
  |
  o  0: A
  
  $ cd ..

With --collapse, check that conflicts can be resolved and rebase can then be
continued

  $ hg init collapse-conflict && cd collapse-conflict
  $ hg debugdrawdag <<'EOF'
  >   Z   # Z/conflict=Z
  >   |
  >   | D
  >   | |
  >   | C # C/conflict=C
  >   | |
  >   Y B
  >   |/
  >   A
  > EOF
  $ hg rebase --collapse -b D -d Z
  rebasing 1:112478962961 B "B"
  rebasing 3:c26739dbe603 C "C"
  merging conflict
  warning: conflicts while merging conflict! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
  [240]
  $ hg tglog
  o  5: D
  |
  | @  4: Z
  | |
  % |  3: C
  | |
  | o  2: Y
  | |
  o |  1: B
  |/
  o  0: A
  
  $ hg st
  M conflict
  A B
  A C
  ? conflict.orig
  $ echo resolved > conflict
  $ hg resolve -m
  (no more unresolved files)
  continue: hg rebase --continue
  $ hg continue
  already rebased 1:112478962961 B "B" as 79bc8f4973ce
  rebasing 3:c26739dbe603 C "C"
  rebasing 5:d24bb333861c D tip "D"
  saved backup bundle to $TESTTMP/collapse-conflict/.hg/strip-backup/112478962961-b5b34645-rebase.hg
  $ hg tglog
  o  3: Collapsed revision
  |  * B
  |  * C
  |  * D
  o  2: Z
  |
  o  1: Y
  |
  o  0: A
  
  $ cd ..

With --collapse, check that the commit message editing can be canceled and
rebase can then be continued

  $ hg init collapse-cancel-editor && cd collapse-cancel-editor
  $ hg debugdrawdag <<'EOF'
  >   Z
  >   |
  >   | D
  >   | |
  >   | C
  >   | |
  >   Y B
  >   |/
  >   A
  > EOF
  $ HGEDITOR=false hg --config ui.interactive=1 rebase --collapse -b D -d Z
  rebasing 1:112478962961 B "B"
  rebasing 3:26805aba1e60 C "C"
  rebasing 5:f585351a92f8 D tip "D"
  abort: edit failed: false exited with status 1
  [250]
  $ hg tglog
  o  5: D
  |
  | o  4: Z
  | |
  o |  3: C
  | |
  | o  2: Y
  | |
  o |  1: B
  |/
  o  0: A
  
  $ hg continue
  rebasing 1:112478962961 B "B"
  rebasing 3:26805aba1e60 C "C"
  rebasing 5:f585351a92f8 D tip "D"
  saved backup bundle to $TESTTMP/collapse-cancel-editor/.hg/strip-backup/112478962961-cb2a9b47-rebase.hg
  $ hg tglog
  o  3: Collapsed revision
  |  * B
  |  * C
  |  * D
  o  2: Z
  |
  o  1: Y
  |
  o  0: A
  
  $ cd ..