[PATCH 0/7] stash/reset/checkout -p: optionally use the add --patch backend written in pure C

At this stage on the journey to a fully built-in git add, we already have everything we need, including the --interactive and --patch options, as long as the add.interactive.useBuiltin setting is set to true. This config setting is kind of a feature flag that is currently turned off by default, and will be for a while, until we get confident enough that the built-in version does the job, and retire the Perl script.

However, the internal add--interactive helper is also used to back the --patch option of git stash, git reset, git checkout and git worktree.

This patch series (based on js/add-p-in-c) brings them "online".

Johannes Schindelin (7):
  built-in add -p: prepare for patch modes other than "stage"
  built-in add -p: implement the "stash" and "reset" patch modes
  legacy stash -p: respect the add.interactive.usebuiltin setting
  built-in stash: use the built-in `git add -p` if so configured
  built-in add -p: implement the "checkout" patch modes
  built-in add -p: implement the "worktree" patch modes
  commit --interactive: make it work with the built-in `add -i`

 add-interactive.c   |   2 +-
 add-interactive.h   |  12 +-
 add-patch.c         | 353 ++++++++++++++++++++++++++++++++++++++++----
 builtin/add.c       |  35 ++++-
 builtin/commit.c    |   8 +-
 builtin/stash.c     |  25 ++--
 git-legacy-stash.sh |   2 +-
 7 files changed, 388 insertions(+), 49 deletions(-)

base-commit: 2e4083198d1508206488af4c82093ceb6cf20f4e
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-174%2Fdscho%2Fother-command-p-in-c-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-174/dscho/other-command-p-in-c-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/174