[PATCH v3 0/5] rebase: cleanup merge strategy option handling

From: Phillip Wood <phillip.wood@dunelm.org.uk>

Cleanup the handling of --strategy-option now that we no longer need to support "--preserve-merges" and properly quote the argument when saving it to disc.

Thanks to Elijah for his comments.

Changes since V2:

 - Added Elijah's Reviewed-by: trailer.
 - Fixed a typo in patch 4 spotted by Elijah.

Changes since V1:

I've rebased these patches onto 'master' to avoid conflicts with 'sg/parse-options-h-initializers' in the new patch 2 (this series depends on 'ab/fix-strategy-opts-parsing' but that has now been merged to master).

Patch 1 - Unchanged.

Patch 2 - New patch to store the merge strategy options in an "struct
          strvec". This patch also introduces a new macro OPT_STRVEC()
          to collect options into an "struct strvec".

Patch 3 - Small simplification due to the changes in patch 2.

Patch 4 - Moved the code to quote a list so it can split by
          split_cmdline() into a new function quote_cmdline() as
	  suggested by Elijah.

Patch 5 - Reworded the commit message as suggested by Elijah.

Base-Commit: 140b9478dad5d19543c1cb4fd293ccec228f1240
Published-As: https://github.com/phillipwood/git/releases/tag/sequencer-merge-strategy-options%2Fv3
View-Changes-At: https://github.com/phillipwood/git/compare/140b9478d...2d1d32811
Fetch-It-Via: git fetch https://github.com/phillipwood/git sequencer-merge-strategy-options/v3

Phillip Wood (5):
  rebase: stop reading and writing unnecessary strategy state
  sequencer: use struct strvec to store merge strategy options
  rebase -m: cleanup --strategy-option handling
  rebase -m: fix serialization of strategy options
  rebase: remove a couple of redundant strategy tests

 alias.c                        | 18 +++++++
 alias.h                        |  3 ++
 builtin/rebase.c               | 54 ++++-----------------
 builtin/revert.c               | 20 ++------
 parse-options-cb.c             | 16 +++++++
 parse-options.h                | 10 ++++
 sequencer.c                    | 57 ++++++++++------------
 sequencer.h                    | 12 +++--
 t/t3402-rebase-merge.sh        | 21 --------
 t/t3418-rebase-continue.sh     | 88 +++++++++++++---------------------
 t/t3436-rebase-more-options.sh | 18 -------
 11 files changed, 126 insertions(+), 191 deletions(-)

Range-diff against v2:
1:  2353c753f5 ! 1:  882b403423 rebase: stop reading and writing unnecessary strategy state
    @@ Commit message
         writing of state files between builtin/rebase.c and sequencer.c but that
         is left for a follow up series.
     
    +    Reviewed-by: Elijah Newren <newren@gmail.com>
         Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
     
      ## builtin/rebase.c ##
2:  dd7b82cdd5 ! 2:  1d8e59aa16 sequencer: use struct strvec to store merge strategy options
    @@ Commit message
         revert" as passing “--no-strategy-option” will now clear any previous
         strategy options whereas before this change it did nothing.
     
    +    Reviewed-by: Elijah Newren <newren@gmail.com>
         Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
     
      ## builtin/revert.c ##
3:  ccef0e6f4b ! 3:  e98ef5ce8c rebase -m: cleanup --strategy-option handling
    @@ Commit message
         mixed blessing but the next commit will fix the root cause of the
         parsing problem so lets not worry about that here.
     
    +    Reviewed-by: Elijah Newren <newren@gmail.com>
         Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
     
      ## builtin/rebase.c ##
4:  9a90212ef2 ! 4:  a5e940e2d0 rebase -m: fix serialization of strategy options
    @@ Commit message
         they are stored as that was an artifact of the scripted rebase.
     
         These changes are backwards compatible so the files written by an older
    -    version of git can be still be read. They are also forwards compatible,
    +    version of git can still be read. They are also forwards compatible,
         the file can still be parsed by recent versions of git as they treat the
         "--" prefix as optional.
     
    +    Reviewed-by: Elijah Newren <newren@gmail.com>
         Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
     
      ## alias.c ##
5:  3515c31b40 ! 5:  2d1d328110 rebase: remove a couple of redundant strategy tests
    @@ Commit message
         preceding test.
     
         Helped-by: Elijah Newren <newren@gmail.com>
    +    Reviewed-by: Elijah Newren <newren@gmail.com>
         Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
     
      ## t/t3402-rebase-merge.sh ##