[PATCH v2 00/23] Enable options --signoff, --reset-author for pick, reword

Hi List,

this is the second reroll of the patch series fixing corner-case bugs regarding empty commits, commits with no log message and root commits, providing a uniform implementation of the to-do list commands using the `do_pick` interface.

This reroll includes the following list of changes to PATCH v1 from last week, mostly induced by Jeff's comments. However, I didn't get around the most recent discussion from tonight yet.

 - new tests: allow replaying commits with empty log messages
     - coverage of all to-do list commands
 - new patch: allow squashing empty commits without complaints
     - do not complain about an empty squash commit unless it is the
       final one and --keep-empty is not specified on the command line
 - new tests: allow rewording empty commits without complaints
     - coverage of all to-do list commands
 - new patch: hide interactive command messages in verbose mode
     - make it possible to launch an editor inside 'output'
 - new patch: allow disabling pre-commit and commit-msg separately
     - add options --no-pre-commit and --no-commit-msg to git-commit
     - redefine --no-verify as synonym for the above two
 - new patch: squash skips commit-msg hook
     - run commit-msg hook for reworded _and_ squashed commits
 - a change to 'test_commit' options and 'fake_editor' debug output

Thanks for your time and reviews,
   Fabian

Fabian Ruch (23):
  rebase -i: allow replaying commits with empty log messages
  rebase -i: allow squashing empty commits without complaints
  rebase -i: allow rewording empty commits without complaints
  rebase -i: hide interactive command messages in verbose mode
  rebase -i: failed reword prints redundant error message
  commit: allow disabling pre-commit and commit-msg separately
  rebase -i: squash skips commit-msg hook
  rebase -i: reword executes pre-commit hook on interim commit
  rebase -i: teach do_pick the option --edit
  rebase -i: implement reword in terms of do_pick
  rebase -i: log the replay of root commits
  rebase -i: root commits are replayed with an unnecessary option
  rebase -i: commit only once when rewriting picks
  rebase -i: do not die in do_pick
  rebase -i: teach do_pick the option --amend
  rebase -i: teach do_pick the option --file
  rebase -i: prepare for squash in terms of do_pick --amend
  rebase -i: implement squash in terms of do_pick
  rebase -i: explicitly distinguish replay commands and exec tasks
  rebase -i: parse to-do list command line options
  rebase -i: teach do_pick the option --reset-author
  rebase -i: teach do_pick the option --signoff
  rebase -i: enable options --signoff, --reset-author for pick, reword

 Documentation/git-commit.txt  |   8 +-
 builtin/commit.c              |  32 ++++-
 git-rebase--interactive.sh    | 288 ++++++++++++++++++++++++++++++++++--------
 git-rebase.sh                 |  12 +-
 t/lib-rebase.sh               |   8 +-
 t/t3404-rebase-interactive.sh | 234 ++++++++++++++++++++++++++++++++--
 t/t3406-rebase-message.sh     |  18 +++
 t/t3412-rebase-root.sh        |  16 +++
 t/t7503-pre-commit-hook.sh    |  65 ++++++++--
 t/t7504-commit-msg-hook.sh    |  85 ++++++++++---
 t/test-lib-functions.sh       |  23 +++-
 11 files changed, 680 insertions(+), 109 deletions(-)