[PATCH 0/8] sequencer refactoring

This is a preparatory series for the separately posted 'rebase --rewind' patch, but I think it has value in itself.

Oswald Buddenhagen (8):
  rebase: simplify code related to imply_merge()
  rebase: move parse_opt_keep_empty() down
  sequencer: pass around rebase action explicitly
  sequencer: create enum for edit_todo_list() return value
  rebase: preserve interactive todo file on checkout failure
  sequencer: simplify allocation of result array in
    todo_list_rearrange_squash()
  sequencer: pass `onto` to complete_action() as object-id
  rebase: improve resumption from incorrect initial todo list

 builtin/rebase.c              |  63 +++++++--------
 builtin/revert.c              |   3 +-
 rebase-interactive.c          |  36 ++++-----
 rebase-interactive.h          |  27 ++++++-
 sequencer.c                   | 139 +++++++++++++++++++---------------
 sequencer.h                   |  15 ++--
 t/t3404-rebase-interactive.sh |  34 ++++++++-
 7 files changed, 196 insertions(+), 121 deletions(-)