[PATCH 0/5] parseopt: add subcommand autocorrection

[Jiamu Sun <39@barroit.sh>]

Git currently provides auto-correction for builtins and aliases, but
lacks this functionality for subcommands parsed via the parse-options
API. Subcommands are also commands, and typos will occur, too. Like:

	git remote add-rul

So, this series introduces subcommand auto-correction.

Currently, builtins with mandatory subcommands enable autocorrection by
default. However, those using PARSE_OPT_SUBCOMMAND_OPTIONAL skip it to
avoid treating valid unknown arguments as mistyped subcommands.

This series adds PARSE_OPT_SUBCOMMAND_AUTOCORR, allowing commands with
optional subcommands to explicitly opt in to autocorrection. It then
enables this flag for git-remote and git-notes.

Additionally, it extracts the existing autocorrection logic from help.c
so subcommand handling can reuse the same config parsing and
prompt/delay logic.

Jiamu Sun (5):
  parseopt: extract subcommand handling from parse_options_step()
  help: refactor command autocorrection handling
  parseopt: autocorrect mistyped subcommands
  parseopt: enable subcommand autocorrect for remote and notes
  help: add tests for subcommand autocorrection

 Makefile                          |   1 +
 autocorrect.c                     |  92 +++++++++++++++++++
 autocorrect.h                     |  23 +++++
 builtin/notes.c                   |  10 +-
 builtin/remote.c                  |  12 +--
 help.c                            | 106 ++++-----------------
 parse-options.c                   | 147 +++++++++++++++++++++++-------
 parse-options.h                   |   1 +
 t/t9004-autocorrect-subcommand.sh |  49 ++++++++++
 9 files changed, 306 insertions(+), 135 deletions(-)
 create mode 100644 autocorrect.c
 create mode 100644 autocorrect.h
 create mode 100755 t/t9004-autocorrect-subcommand.sh


base-commit: 795c338de725e13bd361214c6b768019fc45a2c1
-- 
2.53.0