[PATCH v4 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.

A hopefully final re-roll to fix a memory leak I spotted in V3.

Changes since V3:
 - Fixed a memory leak added in V3. The array returned by
   split_cmdline() is allocated on the heap so we need to fee it. The
   array elements come from the string passed to split_cmdline() so do
   not need to be individually freed.

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%2Fv4
View-Changes-At: https://github.com/phillipwood/git/compare/140b9478d...7de1aa101
Fetch-It-Via: git fetch https://github.com/phillipwood/git sequencer-merge-strategy-options/v4

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                    | 58 ++++++++++------------
 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, 127 insertions(+), 191 deletions(-)

Range-diff against v3:
1:  882b403423 = 1:  882b403423 rebase: stop reading and writing unnecessary strategy state
2:  1d8e59aa16 ! 2:  4b288e883d sequencer: use struct strvec to store merge strategy options
    @@ sequencer.c: void parse_strategy_opts(struct replay_opts *opts, char *raw_opts)
     -		opts->xopts[i] = xstrdup(arg);
     +		strvec_push(&opts->xopts, arg);
      	}
    ++	free(argv);
      }
      
    + static void read_strategy_opts(struct replay_opts *opts, struct strbuf *buf)
     @@ sequencer.c: static void write_strategy_opts(struct replay_opts *opts)
      	int i;
      	struct strbuf buf = STRBUF_INIT;
3:  e98ef5ce8c = 3:  4e040c1214 rebase -m: cleanup --strategy-option handling
4:  a5e940e2d0 = 4:  671ee03503 rebase -m: fix serialization of strategy options
5:  2d1d328110 = 5:  7de1aa1016 rebase: remove a couple of redundant strategy tests